qspi_sdk_zynq
线性地址模式下下，只支持读，不支持写（spi to axi是数据，AXI TO SPI是指令转换）
所以更常用I/O模，因为可以读写。
自动模式在apb下要保持不断的发送，发送速度要大于接收速度。比较困难。
通常都用手动模式
/*
* main.c
*
* Created on: 2022年2月8日
* Author: lht
*/
/******************************************************************************
*
* Copyright (C) 2010 - 2014 Xilinx, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* Use of the Software is limited solely to applications:
* (a) running on a Xilinx device, or
* (b) that interact with a Xilinx device through a bus or interconnect.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the Xilinx shall not be used
* in advertising or otherwise to promote the sale, use or other dealings in
* this Software without prior written authorization from Xilinx.
*
******************************************************************************/
/*****************************************************************************/
/**
*
* @file xqspips_flash_polled_example.c
*
*
* This file contains a design example using the QSPI driver (XQspiPs) in
* polled mode with a serial FLASH device. This examples performs
* some transfers in Auto mode and Manual start mode, to illustrate the modes
* available. It is recommended to use Manual CS + Auto start for
* best performance.
* The hardware which this example runs on. must have a serial FLASH (Numonyx
* N25Q, Winbond W25Q, or Spansion S25FL) for it to run. This example has been
* tested with the Numonyx Serial Flash (N25Q128).
*
* @note
*
* None.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- --- -------- -----------------------------------------------
* 1.00 sdm 11/25/10 First release
* 1.01 srt 06/12/12 Changed to meet frequency requirements of READ command
* for CR 663787
* 2.00a kka 22/08/12 Updated the example as XQspiPs_PolledTransfer API has
* changed. Changed the prescalar to use divide by 8.
* The user can change the prescalar to a maximum of
* divide by 2 based on the reference clock in the
* system.
* Set the Holdb_dr bit in the configuration register using
* XQSPIPS_HOLD_B_DRIVE_OPTION. Setting this bit
* drives the HOLD bit of the QSPI controller.
* This is required for QSPI to be used in Non QSPI boot
* mode else there needs to be an external pullup on this
* line.
* See http://www.xilinx.com/support/answers/47596.htm.
* 2.01a sg 02/03/13 Created a function FlashReadID. Removed multiple
* initialization using SetOptions.
* ms 04/05/17 Modified Comment lines in functions to
* recognize it as documentation block for doxygen
* generation.
*</pre>
*
******************************************************************************/
/***************************** Include Files *********************************/
#include "xparameters.h" /* SDK generated parameters */
#include "xqspips.h" /* QSPI device driver 控制qspi控制器*/
#include "xil_printf.h"
/************************** Constant Definitions *****************************/
/*
* The following constants map to the XPAR parameters created in the
* xparameters.h file. They are defined here such that a user can easily
* change all the needed parameters in one place.
*/
#define QSPI_DEVICE_ID XPAR_XQSPIPS_0_DEVICE_ID
/*
* The following constants define the commands which may be sent to the FLASH
* device.
*/
#define WRITE_STATUS_CMD 0x01
#define WRITE_CMD 0x02
#define READ_CMD 0x03
#define WRITE_DISABLE_CMD 0x04
#define READ_STATUS_CMD 0x05
#define WRITE_ENABLE_CMD 0x06
#define FAST_READ_CMD 0x0B
#define DUAL_READ_CMD 0x3B
#define QUAD_READ_CMD 0x6B
#define BULK_ERASE_CMD 0xC7
#define SEC_ERASE_CMD 0xD8
#define READ_ID 0x9F
/*
* The following constants define the offsets within a FlashBuffer data
* type for each kind of data. Note that the read data offset is not the
* same as the write data because the QSPI driver is designed to allow full
* duplex transfers such that the number of bytes received is the number
* sent and received 定义了一些偏移量.
*/
#define COMMAND_OFFSET 0 /* FLASH instruction */
#define ADDRESS_1_OFFSET 1 /* MSB byte of address to read or write */
#define ADDRESS_2_OFFSET 2 /* Middle byte of address to read or write */
#define ADDRESS_3_OFFSET 3 /* LSB byte of address to read or write */
#define DATA_OFFSET 4 /* Start of Data for Read/Write 命令是一个字节，3个地址字节，所以数据是4*/
#define DUMMY_OFFSET 4 /* Dummy byte offset for fast, dual and quad 伪操作，dummy字节在fast/dual/quad read操作才会有
reads */
#define DUMMY_SIZE 1 /* Number of dummy bytes for fast, dual and
quad reads */
#define RD_ID_SIZE 4 /* Read ID command + 3 bytes ID response */
#define BULK_ERASE_SIZE 1 /* Bulk Erase command size */
#define SEC_ERASE_SIZE 4 /* Sector Erase command + Sector address */
/*
* The following constants specify the extra bytes which are sent to the
* FLASH on the QSPI interface, that are not data, but control information
* which includes the command and address
*/
#define OVERHEAD_SIZE 4 //命令加地址总共4
/*
* The following constants specify the page size, sector size, and number of
* pages and sectors for the FLASH. The page size specifies a max number of
* bytes that can be written to the FLASH with a single transfer.
*/
#define SECTOR_SIZE 0x10000 // 扇区大小
#define NUM_SECTORS 0x100 // 多少个扇区
#define NUM_PAGES 0x10000 // 多少页
#define PAGE_SIZE 256 // 页的大小
/*
* Number of flash pages to be written.
*/
#define PAGE_COUNT 16 //页的个数，相当于后面读写测试测试16页
/*
* Flash address to which data is ot be written.
*/
#define TEST_ADDRESS 0x00055000 //定义测试的起始地址
#define UNIQUE_VALUE 0x05 // 相当于起始值，朝某个起始地址写入数据的时候这个值是多少
/*
* The following constants specify the max amount of data and the size of the
* the buffer required to hold the data and overhead to transfer the data to
* and from the FLASH.
*/
#define MAX_DATA PAGE_COUNT * PAGE_SIZE //读写测试量
/**************************** Type Definitions *******************************/
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Function Prototypes ******************************/
void FlashErase(XQspiPs *QspiPtr, u32 Address, u32 ByteCount);
void FlashWrite(XQspiPs *QspiPtr, u32 Address, u32 ByteCount, u8 Command);
void FlashRead(XQspiPs *QspiPtr, u32 Address, u32 ByteCount, u8 Command);
int FlashReadID(void);
int QspiFlashPolledExample(XQspiPs *QspiInstancePtr, u16 QspiDeviceId);
/************************** Variable Definitions *****************************/
/*
* The instances to support the device drivers are global such that they
* are initialized to zero each time the program runs. They could be local
* but should at least be static so they are zeroed.
*/
static XQspiPs QspiInstance;
/*
* The following variable allows a test value to be added to the values that
* are written to the FLASH such that unique values can be generated to
* guarantee the writes to the FLASH were successful
*/
int Test = 5; //向flash里写数据，每次写完累加的量
/*
* The following variables are used to read and write to the flash and they
* are global to avoid having large buffers on the stack
*/
u8 ReadBuffer[MAX_DATA + DATA_OFFSET + DUMMY_SIZE]; //读出数据定义的数组
u8 WriteBuffer[PAGE_SIZE + DATA_OFFSET]; //写入数据定义的数组
/*****************************************************************************/
/**
*
* Main function to call the QSPI Flash example.
*
* @param None
*
* @return XST_SUCCESS if successful, otherwise XST_FAILURE.
*
* @note None
*
******************************************************************************/
int main(void)
{
int Status;
xil_printf("QSPI FLASH Polled Example Test \r\n");
/*
* Run the Qspi Interrupt example.
*/
Status = QspiFlashPolledExample(&QspiInstance, QSPI_DEVICE_ID);
if (Status != XST_SUCCESS) {
xil_printf("QSPI FLASH Polled Example Test Failed\r\n");
return XST_FAILURE;
}
xil_printf("Successfully ran QSPI FLASH Polled Example Test\r\n");
return XST_SUCCESS;
}
/*****************************************************************************/
/**
*
* The purpose of this function is to illustrate how to use the XQspiPs
* device driver in polled mode. This function writes and reads data
* from a serial FLASH.
*
* @param None.
*
* @return XST_SUCCESS if successful, else XST_FAILURE.
*
* @note None.
*
*****************************************************************************/
int QspiFlashPolledExample(XQspiPs *QspiInstancePtr, u16 QspiDeviceId)
{
int Status;
u8 *BufferPtr;
u8 UniqueValue;
int Count;
int Page;
XQspiPs_Config *QspiConfig;
/*
* Initialize the QSPI driver so that it's ready to use
*/
QspiConfig = XQspiPs_LookupConfig(QspiDeviceId);
if (NULL == QspiConfig) {
return XST_FAILURE;
}
Status = XQspiPs_CfgInitialize(QspiInstancePtr, QspiConfig,
QspiConfig->BaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Perform a self-test to check hardware build
*/
Status = XQspiPs_SelfTest(QspiInstancePtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Initialize the write buffer for a pattern to write to the FLASH
* and the read buffer to zero so it can be verified after the read,
* the test value that is added to the unique value allows the value
* to be changed in a debug environment to guarantee 初始化和赋值
* 一开始进来4+（5+5）【unique=5,test=5,data_offset=4】
*/
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < PAGE_SIZE;
Count++, UniqueValue++) {
WriteBuffer[DATA_OFFSET + Count] = (u8)(UniqueValue + Test);
}
memset(ReadBuffer, 0x00, sizeof(ReadBuffer));//清零readbuffer数据，方便跟writebuffer数据比较
/*
* Set Manual Start and Manual Chip select options and drive HOLD_B
* pin high. 设置成手动开始，手动片选信号。hold B是保持引脚，为低电平时暂停对flash操作
*/
XQspiPs_SetOptions(QspiInstancePtr, XQSPIPS_MANUAL_START_OPTION |
XQSPIPS_FORCE_SSELECT_OPTION |
XQSPIPS_HOLD_B_DRIVE_OPTION);
/*
* Set the prescaler for QSPI clock 分频flash时钟
*/
XQspiPs_SetClkPrescaler(QspiInstancePtr, XQSPIPS_CLK_PRESCALE_8);
/*
* Assert the FLASH chip select. 片选信号有效
*/
XQspiPs_SetSlaveSelect(QspiInstancePtr);
FlashReadID(); //读flashid
/*
* Erase the flash.
*/
FlashErase(QspiInstancePtr, TEST_ADDRESS, MAX_DATA);//写之前先擦除 此处只擦除测试范围
/*
* Write the data in the write buffer to the serial FLASH a page at a
* time, starting from TEST_ADDRESS 每个页分别写入数据
*/
for (Page = 0; Page < PAGE_COUNT; Page++) {
FlashWrite(QspiInstancePtr, (Page * PAGE_SIZE) + TEST_ADDRESS,
PAGE_SIZE, WRITE_CMD);
}
/*
* Read the contents of the FLASH from TEST_ADDRESS, using Normal Read
* command. Change the prescaler as the READ command operates at a
* lower frequency.
*/
FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, READ_CMD);//把数据从falsh里读出来，读出的数据存放在readbuffer
/*
* Setup a pointer to the start of the data that was read into the read
* buffer and verify the data read is the data that was written
*/
BufferPtr = &ReadBuffer[DATA_OFFSET];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA;
Count++, UniqueValue++) {
if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {
return XST_FAILURE;
}
} //读到的数据跟测试的数据做比较，不一致返回错误的标志
//后面都是读的操作了
/*
* Read the contents of the FLASH from TEST_ADDRESS, using Fast Read
* command
*/
memset(ReadBuffer, 0x00, sizeof(ReadBuffer));
FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, FAST_READ_CMD);
/*
* Setup a pointer to the start of the data that was read into the read
* buffer and verify the data read is the data that was written
*/
BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA;
Count++, UniqueValue++) {
if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {
return XST_FAILURE;
}
}
/*
* Read the contents of the FLASH from TEST_ADDRESS, using Dual Read
* command
*/
memset(ReadBuffer, 0x00, sizeof(ReadBuffer));
FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, DUAL_READ_CMD);
/*
* Setup a pointer to the start of the data that was read into the read
* buffer and verify the data read is the data that was written
*/
BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA;
Count++, UniqueValue++) {
if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {
return XST_FAILURE;
}
}
/*
* Read the contents of the FLASH from TEST_ADDRESS, using Quad Read
* command
*/
memset(ReadBuffer, 0x00, sizeof(ReadBuffer));
FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, QUAD_READ_CMD);
/*
* Setup a pointer to the start of the data that was read into the read
* buffer and verify the data read is the data that was written
*/
BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA;
Count++, UniqueValue++) {
if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {
return XST_FAILURE;
}
}
/*
* Initialize the write buffer for a pattern to write to the FLASH
* and the read buffer to zero so it can be verified after the read,
* the test value that is added to the unique value allows the value
* to be changed in a debug environment to guarantee
*/
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < PAGE_SIZE;
Count++, UniqueValue++) {
WriteBuffer[DATA_OFFSET + Count] = (u8)(UniqueValue + Test);
}
memset(ReadBuffer, 0x00, sizeof(ReadBuffer));
/*
* Set Auto Start and Manual Chip select options and drive HOLD_B
* pin high.
*/
XQspiPs_SetOptions(QspiInstancePtr, XQSPIPS_FORCE_SSELECT_OPTION |
XQSPIPS_HOLD_B_DRIVE_OPTION);
/*
* Erase the flash.
*/
FlashErase(QspiInstancePtr, TEST_ADDRESS, MAX_DATA);
/*
* Write the data in the write buffer to the serial FLASH a page at a
* time, starting from TEST_ADDRESS
*/
for (Page = 0; Page < PAGE_COUNT; Page++) {
FlashWrite(QspiInstancePtr, (Page * PAGE_SIZE) + TEST_ADDRESS,
PAGE_SIZE, WRITE_CMD);
}
/*
* Read the contents of the FLASH from TEST_ADDRESS, using Normal Read
* command. Change the prescaler as the READ command operates at a
* lower frequency.
*/
FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, READ_CMD);
/*
* Setup a pointer to the start of the data that was read into the read
* buffer and verify the data read is the data that was written
*/
BufferPtr = &ReadBuffer[DATA_OFFSET];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA;
Count++, UniqueValue++) {
if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {
return XST_FAILURE;
}
}
/*
* Read the contents of the FLASH from TEST_ADDRESS, using Fast Read
* command
*/
memset(ReadBuffer, 0x00, sizeof(ReadBuffer));
FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, FAST_READ_CMD);
/*
* Setup a pointer to the start of the data that was read into the read
* buffer and verify the data read is the data that was written
*/
BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA;
Count++, UniqueValue++) {
if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {
return XST_FAILURE;
}
}
/*
* Read the contents of the FLASH from TEST_ADDRESS, using Dual Read
* command
*/
memset(ReadBuffer, 0x00, sizeof(ReadBuffer));
FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, DUAL_READ_CMD);
/*
* Setup a pointer to the start of the data that was read into the read
* buffer and verify the data read is the data that was written
*/
BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA;
Count++, UniqueValue++) {
if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {
return XST_FAILURE;
}
}
/*
* Read the contents of the FLASH from TEST_ADDRESS, using Quad Read
* command
*/
memset(ReadBuffer, 0x00, sizeof(ReadBuffer));
FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, QUAD_READ_CMD);
/*
* Setup a pointer to the start of the data that was read into the read
* buffer and verify the data read is the data that was written
*/
BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA;
Count++, UniqueValue++) {
if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {
return XST_FAILURE;
}
}
return XST_SUCCESS;
}
/*****************************************************************************/
/**
*
* This function writes to the serial FLASH connected to the QSPI interface.
* All the data put into the buffer must be in the same page of the device with
* page boundaries being on 256 byte boundaries.
*
* @param QspiPtr is a pointer to the QSPI driver component to use.
* @param Address contains the address to write data to in the FLASH.
* @param ByteCount contains the number of bytes to write.
* @param Command is the command used to write data to the flash. QSPI
* device supports only Page Program command to write data to the
* flash.
*
* @return None.
*
* @note None.
*
******************************************************************************/
void FlashWrite(XQspiPs *QspiPtr, u32 Address, u32 ByteCount, u8 Command)
{
u8 WriteEnableCmd = { WRITE_ENABLE_CMD };
u8 ReadStatusCmd[] = { READ_STATUS_CMD, 0 }; /* must send 2 bytes */
u8 FlashStatus[2];
/*
* Send the write enable command to the FLASH so that it can be
* written to, this needs to be sent as a seperate transfer before
* the write
*/
XQspiPs_PolledTransfer(QspiPtr, &WriteEnableCmd, NULL,
sizeof(WriteEnableCmd));
/*
* Setup the write command with the specified address and data for the
* FLASH
*/
WriteBuffer[COMMAND_OFFSET] = Command;
WriteBuffer[ADDRESS_1_OFFSET] = (u8)((Address & 0xFF0000) >> 16);
WriteBuffer[ADDRESS_2_OFFSET] = (u8)((Address & 0xFF00) >> 8);
WriteBuffer[ADDRESS_3_OFFSET] = (u8)(Address & 0xFF);
/*
* Send the write command, address, and data to the FLASH to be
* written, no receive buffer is specified since there is nothing to
* receive
*/
XQspiPs_PolledTransfer(QspiPtr, WriteBuffer, NULL,
ByteCount + OVERHEAD_SIZE);
/*
* Wait for the write command to the FLASH to be completed, it takes
* some time for the data to be written
*/
while (1) {
/*
* Poll the status register of the FLASH to determine when it
* completes, by sending a read status command and receiving the
* status byte
*/
XQspiPs_PolledTransfer(QspiPtr, ReadStatusCmd, FlashStatus,
sizeof(ReadStatusCmd));
/*
* If the status indicates the write is done, then stop waiting,
* if a value of 0xFF in the status byte is read from the
* device and this loop never exits, the device slave select is
* possibly incorrect such that the device status is not being
* read
*/
if ((FlashStatus[1] & 0x01) == 0) {
break;
}
}
}
/*****************************************************************************/
/**
*
* This function reads from the serial FLASH connected to the
* QSPI interface.
*
* @param QspiPtr is a pointer to the QSPI driver component to use.
* @param Address contains the address to read data from in the FLASH.
* @param ByteCount contains the number of bytes to read.
* @param Command is the command used to read data from the flash. QSPI
* device supports one of the Read, Fast Read, Dual Read and Fast
* Read commands to read data from the flash.
*
* @return None.
*
* @note None.
*
******************************************************************************/
void FlashRead(XQspiPs *QspiPtr, u32 Address, u32 ByteCount, u8 Command)
{
/*
* Setup the write command with the specified address and data for the
* FLASH
*/
WriteBuffer[COMMAND_OFFSET] = Command;
WriteBuffer[ADDRESS_1_OFFSET] = (u8)((Address & 0xFF0000) >> 16);
WriteBuffer[ADDRESS_2_OFFSET] = (u8)((Address & 0xFF00) >> 8);
WriteBuffer[ADDRESS_3_OFFSET] = (u8)(Address & 0xFF);
if ((Command == FAST_READ_CMD) || (Command == DUAL_READ_CMD) ||
(Command == QUAD_READ_CMD)) {
ByteCount += DUMMY_SIZE;
}
/*
* Send the read command to the FLASH to read the specified number
* of bytes from the FLASH, send the read command and address and
* receive the specified number of bytes of data in the data buffer
*/
XQspiPs_PolledTransfer(QspiPtr, WriteBuffer, ReadBuffer,//flash读出的数据存在readbuffer
ByteCount + OVERHEAD_SIZE);
}
/*****************************************************************************/
/**
*
* This function erases the sectors in the serial FLASH connected to the
* QSPI interface.
*
* @param QspiPtr is a pointer to the QSPI driver component to use.
* @param Address contains the address of the first sector which needs to
* be erased.
* @param ByteCount contains the total size to be erased.
*
* @return None.
*
* @note None.
*
******************************************************************************/
void FlashErase(XQspiPs *QspiPtr, u32 Address, u32 ByteCount)
{
u8 WriteEnableCmd = { WRITE_ENABLE_CMD };
u8 ReadStatusCmd[] = { READ_STATUS_CMD, 0 }; /* must send 2 bytes */
u8 FlashStatus[2];
int Sector;
/*
* If erase size is same as the total size of the flash, use bulk erase
* command
*/
if (ByteCount == (NUM_SECTORS * SECTOR_SIZE)) {
/*
* Send the write enable command to the FLASH so that it can be
* written to, this needs to be sent as a seperate transfer
* before the erase
*/
XQspiPs_PolledTransfer(QspiPtr, &WriteEnableCmd, NULL,
sizeof(WriteEnableCmd));
/*
* Setup the bulk erase command
*/
WriteBuffer[COMMAND_OFFSET] = BULK_ERASE_CMD;
/*
* Send the bulk erase command; no receive buffer is specified
* since there is nothing to receive
*/
XQspiPs_PolledTransfer(QspiPtr, WriteBuffer, NULL,
BULK_ERASE_SIZE);
/*
* Wait for the erase command to the FLASH to be completed
*/
while (1) {
/*
* Poll the status register of the device to determine
* when it completes, by sending a read status command
* and receiving the status byte
*/
XQspiPs_PolledTransfer(QspiPtr, ReadStatusCmd,
FlashStatus,
sizeof(ReadStatusCmd));
/*
* If the status indicates the write is done, then stop
* waiting; if a value of 0xFF in the status byte is
* read from the device and this loop never exits, the
* device slave select is possibly incorrect such that
* the device status is not being read
*/
if ((FlashStatus[1] & 0x01) == 0) {
break;
}
}
return;
}
/*
* If the erase size is less than the total size of the flash, use
* sector erase command
*/
for (Sector = 0; Sector < ((ByteCount / SECTOR_SIZE) + 1); Sector++) {
/*
* Send the write enable command to the SEEPOM so that it can be
* written to, this needs to be sent as a seperate transfer
* before the write
*/
XQspiPs_PolledTransfer(QspiPtr, &WriteEnableCmd, NULL,
sizeof(WriteEnableCmd));
/*
* Setup the write command with the specified address and data
* for the FLASH
*/
WriteBuffer[COMMAND_OFFSET] = SEC_ERASE_CMD;
WriteBuffer[ADDRESS_1_OFFSET] = (u8)(Address >> 16);
WriteBuffer[ADDRESS_2_OFFSET] = (u8)(Address >> 8);
WriteBuffer[ADDRESS_3_OFFSET] = (u8)(Address & 0xFF);
/*
* Send the sector erase command and address; no receive buffer
* is specified since there is nothing to receive
*/
XQspiPs_PolledTransfer(QspiPtr, WriteBuffer, NULL,
SEC_ERASE_SIZE);
/*
* Wait for the sector erse command to the FLASH to be completed
*/
while (1) {
/*
* Poll the status register of the device to determine
* when it completes, by sending a read status command
* and receiving the status byte
*/
XQspiPs_PolledTransfer(QspiPtr, ReadStatusCmd,
FlashStatus,
sizeof(ReadStatusCmd));
/*
* If the status indicates the write is done, then stop
* waiting, if a value of 0xFF in the status byte is
* read from the device and this loop never exits, the
* device slave select is possibly incorrect such that
* the device status is not being read
*/
if ((FlashStatus[1] & 0x01) == 0) {
break;
}
}
Address += SECTOR_SIZE;
}
}
/*****************************************************************************/
/**
*
* This function reads serial FLASH ID connected to the SPI interface.
*
* @param None.
*
* @return XST_SUCCESS if read id, otherwise XST_FAILURE.
*
* @note None.
*
******************************************************************************/
int FlashReadID(void)
{
int Status;
/*
* Read ID in Auto mode.
*/
WriteBuffer[COMMAND_OFFSET] = READ_ID;
WriteBuffer[ADDRESS_1_OFFSET] = 0x23; /* 3 dummy bytes */
WriteBuffer[ADDRESS_2_OFFSET] = 0x08;
WriteBuffer[ADDRESS_3_OFFSET] = 0x09;
Status = XQspiPs_PolledTransfer(&QspiInstance, WriteBuffer, ReadBuffer,
RD_ID_SIZE);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
xil_printf("FlashID=0x%x 0x%x 0x%x\n\r", ReadBuffer[1], ReadBuffer[2],
ReadBuffer[3]);
return XST_SUCCESS;
}
/* * main.c * * Created on: 2022年2月8日 * Author: lht *//******************************************************************************** Copyright (C) 2010 - 2014 Xilinx, Inc. All rights reserved.** Permission is hereby granted, free of charge, to any person obtaining a copy* of this software and associated documentation files (the "Software"), to deal* in the Software without restriction, including without limitation the rights* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell* copies of the Software, and to permit persons to whom the Software is* furnished to do so, subject to the following conditions:** The above copyright notice and this permission notice shall be included in* all copies or substantial portions of the Software.** Use of the Software is limited solely to applications:* (a) running on a Xilinx device, or* (b) that interact with a Xilinx device through a bus or interconnect.** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE* SOFTWARE.** Except as contained in this notice, the name of the Xilinx shall not be used* in advertising or otherwise to promote the sale, use or other dealings in* this Software without prior written authorization from Xilinx.*******************************************************************************//*****************************************************************************//**** @file xqspips_flash_polled_example.c*** This file contains a design example using the QSPI driver (XQspiPs) in* polled mode with a serial FLASH device. This examples performs* some transfers in Auto mode and Manual start mode, to illustrate the modes* available. It is recommended to use Manual CS + Auto start for* best performance.* The hardware which this example runs on. must have a serial FLASH (Numonyx* N25Q, Winbond W25Q, or Spansion S25FL) for it to run. This example has been* tested with the Numonyx Serial Flash (N25Q128).** @note** None.** <pre>* MODIFICATION HISTORY:** Ver Who Date Changes* ----- --- -------- -----------------------------------------------* 1.00 sdm 11/25/10 First release* 1.01 srt 06/12/12 Changed to meet frequency requirements of READ command* for CR 663787* 2.00akka 22/08/12 Updated the example as XQspiPs_PolledTransfer API has* changed. Changed the prescalar to use divide by 8.* The user can change the prescalar to a maximum of* divide by 2 based on the reference clock in the* system.* Set the Holdb_dr bit in the configuration register using* XQSPIPS_HOLD_B_DRIVE_OPTION. Setting this bit* drives the HOLD bit of the QSPI controller.* This is required for QSPI to be used in Non QSPI boot* mode else there needs to be an external pullup on this* line.* See http://www.xilinx.com/support/answers/47596.htm.* 2.01a sg 02/03/13 Created a function FlashReadID. Removed multiple* initialization using SetOptions.* ms 04/05/17 Modified Comment lines in functions to* recognize it as documentation block for doxygen* generation.*</pre>*******************************************************************************/
/***************************** Include Files *********************************/
#include "xparameters.h"/* SDK generated parameters */#include "xqspips.h"/* QSPI device driver 控制qspi控制器*/#include "xil_printf.h"
/************************** Constant Definitions *****************************/
/* * The following constants map to the XPAR parameters created in the * xparameters.h file. They are defined here such that a user can easily * change all the needed parameters in one place. */#define QSPI_DEVICE_IDXPAR_XQSPIPS_0_DEVICE_ID
/* * The following constants define the commands which may be sent to the FLASH * device. */#define WRITE_STATUS_CMD0x01#define WRITE_CMD0x02#define READ_CMD0x03#define WRITE_DISABLE_CMD0x04#define READ_STATUS_CMD0x05#define WRITE_ENABLE_CMD0x06#define FAST_READ_CMD0x0B#define DUAL_READ_CMD0x3B#define QUAD_READ_CMD0x6B#define BULK_ERASE_CMD0xC7#defineSEC_ERASE_CMD0xD8#define READ_ID0x9F
/* * The following constants define the offsets within a FlashBuffer data * type for each kind of data. Note that the read data offset is not the * same as the write data because the QSPI driver is designed to allow full * duplex transfers such that the number of bytes received is the number * sent and received定义了一些偏移量. */#define COMMAND_OFFSET0 /* FLASH instruction */#define ADDRESS_1_OFFSET1 /* MSB byte of address to read or write */#define ADDRESS_2_OFFSET2 /* Middle byte of address to read or write */#define ADDRESS_3_OFFSET3 /* LSB byte of address to read or write */#define DATA_OFFSET4 /* Start of Data for Read/Write 命令是一个字节，3个地址字节，所以数据是4*/#define DUMMY_OFFSET4 /* Dummy byte offset for fast, dual and quad 伪操作，dummy字节在fast/dual/quad read操作才会有 reads */#define DUMMY_SIZE1 /* Number of dummy bytes for fast, dual and quad reads */#define RD_ID_SIZE4 /* Read ID command + 3 bytes ID response */#define BULK_ERASE_SIZE1 /* Bulk Erase command size */#define SEC_ERASE_SIZE4 /* Sector Erase command + Sector address */
/* * The following constants specify the extra bytes which are sent to the * FLASH on the QSPI interface, that are not data, but control information * which includes the command and address */#define OVERHEAD_SIZE4//命令加地址总共4
/* * The following constants specify the page size, sector size, and number of * pages and sectors for the FLASH. The page size specifies a max number of * bytes that can be written to the FLASH with a single transfer. */#define SECTOR_SIZE0x10000 //扇区大小#define NUM_SECTORS0x100//多少个扇区#define NUM_PAGES0x10000 //多少页#define PAGE_SIZE256// 页的大小
/* * Number of flash pages to be written. */#define PAGE_COUNT16//页的个数，相当于后面读写测试测试16页
/* * Flash address to which data is ot be written. */#define TEST_ADDRESS0x00055000//定义测试的起始地址#define UNIQUE_VALUE0x05//相当于起始值，朝某个起始地址写入数据的时候这个值是多少/* * The following constants specify the max amount of data and the size of the * the buffer required to hold the data and overhead to transfer the data to * and from the FLASH. */#define MAX_DATAPAGE_COUNT * PAGE_SIZE //读写测试量
/**************************** Type Definitions *******************************/
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Function Prototypes ******************************/
void FlashErase(XQspiPs *QspiPtr, u32 Address, u32 ByteCount);
void FlashWrite(XQspiPs *QspiPtr, u32 Address, u32 ByteCount, u8 Command);
void FlashRead(XQspiPs *QspiPtr, u32 Address, u32 ByteCount, u8 Command);
int FlashReadID(void);
int QspiFlashPolledExample(XQspiPs *QspiInstancePtr, u16 QspiDeviceId);
/************************** Variable Definitions *****************************/
/* * The instances to support the device drivers are global such that they * are initialized to zero each time the program runs. They could be local * but should at least be static so they are zeroed. */static XQspiPs QspiInstance;
/* * The following variable allows a test value to be added to the values that * are written to the FLASH such that unique values can be generated to * guarantee the writes to the FLASH were successful */int Test = 5;//向flash里写数据，每次写完累加的量
/* * The following variables are used to read and write to the flash and they * are global to avoid having large buffers on the stack */u8 ReadBuffer[MAX_DATA + DATA_OFFSET + DUMMY_SIZE]; //读出数据定义的数组u8 WriteBuffer[PAGE_SIZE + DATA_OFFSET];//写入数据定义的数组
/*****************************************************************************//**** Main function to call the QSPI Flash example.** @paramNone** @returnXST_SUCCESS if successful, otherwise XST_FAILURE.** @noteNone*******************************************************************************/int main(void){int Status;
xil_printf("QSPI FLASH Polled Example Test \r\n");
/* * Run the Qspi Interrupt example. */Status = QspiFlashPolledExample(&QspiInstance, QSPI_DEVICE_ID);if (Status != XST_SUCCESS) {xil_printf("QSPI FLASH Polled Example Test Failed\r\n");return XST_FAILURE;}
xil_printf("Successfully ran QSPI FLASH Polled Example Test\r\n");return XST_SUCCESS;}
/*****************************************************************************//**** The purpose of this function is to illustrate how to use the XQspiPs* device driver in polled mode. This function writes and reads data* from a serial FLASH.** @paramNone.** @returnXST_SUCCESS if successful, else XST_FAILURE.** @noteNone.******************************************************************************/int QspiFlashPolledExample(XQspiPs *QspiInstancePtr, u16 QspiDeviceId){int Status;u8 *BufferPtr;u8 UniqueValue;int Count;int Page;XQspiPs_Config *QspiConfig;
/* * Initialize the QSPI driver so that it's ready to use */QspiConfig = XQspiPs_LookupConfig(QspiDeviceId);if (NULL == QspiConfig) {return XST_FAILURE;}
Status = XQspiPs_CfgInitialize(QspiInstancePtr, QspiConfig,QspiConfig->BaseAddress);if (Status != XST_SUCCESS) {return XST_FAILURE;}
/* * Perform a self-test to check hardware build */Status = XQspiPs_SelfTest(QspiInstancePtr);if (Status != XST_SUCCESS) {return XST_FAILURE;}
/* * Initialize the write buffer for a pattern to write to the FLASH * and the read buffer to zero so it can be verified after the read, * the test value that is added to the unique value allows the value * to be changed in a debug environment to guarantee 初始化和赋值 * 一开始进来4+（5+5）【unique=5,test=5,data_offset=4】 */for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < PAGE_SIZE; Count++, UniqueValue++) {WriteBuffer[DATA_OFFSET + Count] = (u8)(UniqueValue + Test);}memset(ReadBuffer, 0x00, sizeof(ReadBuffer));//清零readbuffer数据，方便跟writebuffer数据比较
/* * Set Manual Start and Manual Chip select options and drive HOLD_B * pin high.设置成手动开始，手动片选信号。hold B是保持引脚，为低电平时暂停对flash操作 */XQspiPs_SetOptions(QspiInstancePtr, XQSPIPS_MANUAL_START_OPTION |XQSPIPS_FORCE_SSELECT_OPTION |XQSPIPS_HOLD_B_DRIVE_OPTION);
/* * Set the prescaler for QSPI clock 分频flash时钟 */XQspiPs_SetClkPrescaler(QspiInstancePtr, XQSPIPS_CLK_PRESCALE_8);
/* * Assert the FLASH chip select.片选信号有效 */XQspiPs_SetSlaveSelect(QspiInstancePtr);
FlashReadID();//读flashid
/* * Erase the flash. */FlashErase(QspiInstancePtr, TEST_ADDRESS, MAX_DATA);//写之前先擦除 此处只擦除测试范围
/* * Write the data in the write buffer to the serial FLASH a page at a * time, starting from TEST_ADDRESS每个页分别写入数据 */for (Page = 0; Page < PAGE_COUNT; Page++) {FlashWrite(QspiInstancePtr, (Page * PAGE_SIZE) + TEST_ADDRESS, PAGE_SIZE, WRITE_CMD);}
/* * Read the contents of the FLASH from TEST_ADDRESS, using Normal Read * command. Change the prescaler as the READ command operates at a * lower frequency. */FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, READ_CMD);//把数据从falsh里读出来，读出的数据存放在readbuffer
/* * Setup a pointer to the start of the data that was read into the read * buffer and verify the data read is the data that was written */BufferPtr = &ReadBuffer[DATA_OFFSET];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA; Count++, UniqueValue++) {if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {return XST_FAILURE;}}//读到的数据跟测试的数据做比较，不一致返回错误的标志//后面都是读的操作了/* * Read the contents of the FLASH from TEST_ADDRESS, using Fast Read * command */memset(ReadBuffer, 0x00, sizeof(ReadBuffer));FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, FAST_READ_CMD);
/* * Setup a pointer to the start of the data that was read into the read * buffer and verify the data read is the data that was written */BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA; Count++, UniqueValue++) {if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {return XST_FAILURE;}}
/* * Read the contents of the FLASH from TEST_ADDRESS, using Dual Read * command */memset(ReadBuffer, 0x00, sizeof(ReadBuffer));FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, DUAL_READ_CMD);
/* * Setup a pointer to the start of the data that was read into the read * buffer and verify the data read is the data that was written */BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA; Count++, UniqueValue++) {if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {return XST_FAILURE;}}
/* * Read the contents of the FLASH from TEST_ADDRESS, using Quad Read * command */memset(ReadBuffer, 0x00, sizeof(ReadBuffer));FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, QUAD_READ_CMD);
/* * Setup a pointer to the start of the data that was read into the read * buffer and verify the data read is the data that was written */BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA; Count++, UniqueValue++) {if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {return XST_FAILURE;}}
/* * Initialize the write buffer for a pattern to write to the FLASH * and the read buffer to zero so it can be verified after the read, * the test value that is added to the unique value allows the value * to be changed in a debug environment to guarantee */for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < PAGE_SIZE; Count++, UniqueValue++) {WriteBuffer[DATA_OFFSET + Count] = (u8)(UniqueValue + Test);}memset(ReadBuffer, 0x00, sizeof(ReadBuffer));
/* * Set Auto Start and Manual Chip select options and drive HOLD_B * pin high. */XQspiPs_SetOptions(QspiInstancePtr, XQSPIPS_FORCE_SSELECT_OPTION |XQSPIPS_HOLD_B_DRIVE_OPTION);
/* * Erase the flash. */FlashErase(QspiInstancePtr, TEST_ADDRESS, MAX_DATA);
/* * Write the data in the write buffer to the serial FLASH a page at a * time, starting from TEST_ADDRESS */for (Page = 0; Page < PAGE_COUNT; Page++) {FlashWrite(QspiInstancePtr, (Page * PAGE_SIZE) + TEST_ADDRESS, PAGE_SIZE, WRITE_CMD);}
/* * Read the contents of the FLASH from TEST_ADDRESS, using Normal Read * command. Change the prescaler as the READ command operates at a * lower frequency. */FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, READ_CMD);
/* * Setup a pointer to the start of the data that was read into the read * buffer and verify the data read is the data that was written */BufferPtr = &ReadBuffer[DATA_OFFSET];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA; Count++, UniqueValue++) {if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {return XST_FAILURE;}}
/* * Read the contents of the FLASH from TEST_ADDRESS, using Fast Read * command */memset(ReadBuffer, 0x00, sizeof(ReadBuffer));FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, FAST_READ_CMD);
/* * Setup a pointer to the start of the data that was read into the read * buffer and verify the data read is the data that was written */BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA; Count++, UniqueValue++) {if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {return XST_FAILURE;}}
/* * Read the contents of the FLASH from TEST_ADDRESS, using Dual Read * command */memset(ReadBuffer, 0x00, sizeof(ReadBuffer));FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, DUAL_READ_CMD);
/* * Setup a pointer to the start of the data that was read into the read * buffer and verify the data read is the data that was written */BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA; Count++, UniqueValue++) {if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {return XST_FAILURE;}}
/* * Read the contents of the FLASH from TEST_ADDRESS, using Quad Read * command */memset(ReadBuffer, 0x00, sizeof(ReadBuffer));FlashRead(QspiInstancePtr, TEST_ADDRESS, MAX_DATA, QUAD_READ_CMD);
/* * Setup a pointer to the start of the data that was read into the read * buffer and verify the data read is the data that was written */BufferPtr = &ReadBuffer[DATA_OFFSET + DUMMY_SIZE];
for (UniqueValue = UNIQUE_VALUE, Count = 0; Count < MAX_DATA; Count++, UniqueValue++) {if (BufferPtr[Count] != (u8)(UniqueValue + Test)) {return XST_FAILURE;}}
return XST_SUCCESS;}
/*****************************************************************************//**** This function writes to the serial FLASH connected to the QSPI interface.* All the data put into the buffer must be in the same page of the device with* page boundaries being on 256 byte boundaries.** @paramQspiPtr is a pointer to the QSPI driver component to use.* @paramAddress contains the address to write data to in the FLASH.* @paramByteCount contains the number of bytes to write.* @paramCommand is the command used to write data to the flash. QSPI*device supports only Page Program command to write data to the*flash.** @returnNone.** @noteNone.*******************************************************************************/void FlashWrite(XQspiPs *QspiPtr, u32 Address, u32 ByteCount, u8 Command){u8 WriteEnableCmd = { WRITE_ENABLE_CMD };u8 ReadStatusCmd[] = { READ_STATUS_CMD, 0 }; /* must send 2 bytes */u8 FlashStatus[2];
/* * Send the write enable command to the FLASH so that it can be * written to, this needs to be sent as a seperate transfer before * the write */XQspiPs_PolledTransfer(QspiPtr, &WriteEnableCmd, NULL,sizeof(WriteEnableCmd));
/* * Setup the write command with the specified address and data for the * FLASH */WriteBuffer[COMMAND_OFFSET] = Command;WriteBuffer[ADDRESS_1_OFFSET] = (u8)((Address & 0xFF0000) >> 16);WriteBuffer[ADDRESS_2_OFFSET] = (u8)((Address & 0xFF00) >> 8);WriteBuffer[ADDRESS_3_OFFSET] = (u8)(Address & 0xFF);
/* * Send the write command, address, and data to the FLASH to be * written, no receive buffer is specified since there is nothing to * receive */XQspiPs_PolledTransfer(QspiPtr, WriteBuffer, NULL,ByteCount + OVERHEAD_SIZE);
/* * Wait for the write command to the FLASH to be completed, it takes * some time for the data to be written */while (1) {/* * Poll the status register of the FLASH to determine when it * completes, by sending a read status command and receiving the * status byte */XQspiPs_PolledTransfer(QspiPtr, ReadStatusCmd, FlashStatus,sizeof(ReadStatusCmd));
/* * If the status indicates the write is done, then stop waiting, * if a value of 0xFF in the status byte is read from the * device and this loop never exits, the device slave select is * possibly incorrect such that the device status is not being * read */if ((FlashStatus[1] & 0x01) == 0) {break;}}}
/*****************************************************************************//**** This function reads from the serial FLASH connected to the* QSPI interface.** @paramQspiPtr is a pointer to the QSPI driver component to use.* @paramAddress contains the address to read data from in the FLASH.* @paramByteCount contains the number of bytes to read.* @paramCommand is the command used to read data from the flash. QSPI*device supports one of the Read, Fast Read, Dual Read and Fast*Read commands to read data from the flash.** @returnNone.** @noteNone.*******************************************************************************/void FlashRead(XQspiPs *QspiPtr, u32 Address, u32 ByteCount, u8 Command){/* * Setup the write command with the specified address and data for the * FLASH */WriteBuffer[COMMAND_OFFSET] = Command;WriteBuffer[ADDRESS_1_OFFSET] = (u8)((Address & 0xFF0000) >> 16);WriteBuffer[ADDRESS_2_OFFSET] = (u8)((Address & 0xFF00) >> 8);WriteBuffer[ADDRESS_3_OFFSET] = (u8)(Address & 0xFF);
if ((Command == FAST_READ_CMD) || (Command == DUAL_READ_CMD) || (Command == QUAD_READ_CMD)) {ByteCount += DUMMY_SIZE;}/* * Send the read command to the FLASH to read the specified number * of bytes from the FLASH, send the read command and address and * receive the specified number of bytes of data in the data buffer */XQspiPs_PolledTransfer(QspiPtr, WriteBuffer, ReadBuffer,//flash读出的数据存在readbufferByteCount + OVERHEAD_SIZE);}
/*****************************************************************************//**** This function erases the sectors in the serial FLASH connected to the* QSPI interface.** @paramQspiPtr is a pointer to the QSPI driver component to use.* @paramAddress contains the address of the first sector which needs to*be erased.* @paramByteCount contains the total size to be erased.** @returnNone.** @noteNone.*******************************************************************************/void FlashErase(XQspiPs *QspiPtr, u32 Address, u32 ByteCount){u8 WriteEnableCmd = { WRITE_ENABLE_CMD };u8 ReadStatusCmd[] = { READ_STATUS_CMD, 0 }; /* must send 2 bytes */u8 FlashStatus[2];int Sector;
/* * If erase size is same as the total size of the flash, use bulk erase * command */if (ByteCount == (NUM_SECTORS * SECTOR_SIZE)) {/* * Send the write enable command to the FLASH so that it can be * written to, this needs to be sent as a seperate transfer * before the erase */XQspiPs_PolledTransfer(QspiPtr, &WriteEnableCmd, NULL, sizeof(WriteEnableCmd));
/* * Setup the bulk erase command */WriteBuffer[COMMAND_OFFSET] = BULK_ERASE_CMD;
/* * Send the bulk erase command; no receive buffer is specified * since there is nothing to receive */XQspiPs_PolledTransfer(QspiPtr, WriteBuffer, NULL,BULK_ERASE_SIZE);
/* * Wait for the erase command to the FLASH to be completed */while (1) {/* * Poll the status register of the device to determine * when it completes, by sending a read status command * and receiving the status byte */XQspiPs_PolledTransfer(QspiPtr, ReadStatusCmd,FlashStatus,sizeof(ReadStatusCmd));
/* * If the status indicates the write is done, then stop * waiting; if a value of 0xFF in the status byte is * read from the device and this loop never exits, the * device slave select is possibly incorrect such that * the device status is not being read */if ((FlashStatus[1] & 0x01) == 0) {break;}}
return;}
/* * If the erase size is less than the total size of the flash, use * sector erase command */for (Sector = 0; Sector < ((ByteCount / SECTOR_SIZE) + 1); Sector++) {/* * Send the write enable command to the SEEPOM so that it can be * written to, this needs to be sent as a seperate transfer * before the write */XQspiPs_PolledTransfer(QspiPtr, &WriteEnableCmd, NULL,sizeof(WriteEnableCmd));
/* * Setup the write command with the specified address and data * for the FLASH */WriteBuffer[COMMAND_OFFSET] = SEC_ERASE_CMD;WriteBuffer[ADDRESS_1_OFFSET] = (u8)(Address >> 16);WriteBuffer[ADDRESS_2_OFFSET] = (u8)(Address >> 8);WriteBuffer[ADDRESS_3_OFFSET] = (u8)(Address & 0xFF);
/* * Send the sector erase command and address; no receive buffer * is specified since there is nothing to receive */XQspiPs_PolledTransfer(QspiPtr, WriteBuffer, NULL,SEC_ERASE_SIZE);
/* * Wait for the sector erse command to the FLASH to be completed */while (1) {/* * Poll the status register of the device to determine * when it completes, by sending a read status command * and receiving the status byte */XQspiPs_PolledTransfer(QspiPtr, ReadStatusCmd,FlashStatus,sizeof(ReadStatusCmd));
/* * If the status indicates the write is done, then stop * waiting, if a value of 0xFF in the status byte is * read from the device and this loop never exits, the * device slave select is possibly incorrect such that * the device status is not being read */if ((FlashStatus[1] & 0x01) == 0) {break;}}
Address += SECTOR_SIZE;}}
/*****************************************************************************//**** This function reads serial FLASH ID connected to the SPI interface.** @paramNone.** @returnXST_SUCCESS if read id, otherwise XST_FAILURE.** @noteNone.*******************************************************************************/int FlashReadID(void){int Status;
/* * Read ID in Auto mode. */WriteBuffer[COMMAND_OFFSET] = READ_ID;WriteBuffer[ADDRESS_1_OFFSET] = 0x23;/* 3 dummy bytes */WriteBuffer[ADDRESS_2_OFFSET] = 0x08;WriteBuffer[ADDRESS_3_OFFSET] = 0x09;
Status = XQspiPs_PolledTransfer(&QspiInstance, WriteBuffer, ReadBuffer,RD_ID_SIZE);if (Status != XST_SUCCESS) {return XST_FAILURE;}
xil_printf("FlashID=0x%x 0x%x 0x%x\n\r", ReadBuffer[1], ReadBuffer[2], ReadBuffer[3]);
return XST_SUCCESS;}
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