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/**
*********************************************************************************************************
* Copyright(c) 2015, Realtek Semiconductor Corporation. All rights reserved.
**********************************************************************************************************
* @file main.c
* @brief This file provides demo code of spi write and ead data from GD25Q128E flash.
* @details
* @author yuan
* @date 2019-07-10
* @version v1.0
*********************************************************************************************************
*/
#include "spi_flash.h"
#include "io_spi.h"
#include "trace.h"
#include <string.h>
void spi_flash_read_id(uint8_t *pFlashId)
{
uint8_t send_buf[4] = {SPI_FLASH_JEDEC_ID, 0, 0, 0};
uint8_t recv_buf[10] = {0};
uint8_t recv_len = 3;
#if (SPI_MODE_EEPROM == SPI_MODE)
SPI_SetReadLen(FLASH_SPI, 3);
SPI_SendBuffer(FLASH_SPI, send_buf, 1);
#elif (SPI_MODE_FULLDUPLEX == SPI_MODE)
SPI_SendBuffer(FLASH_SPI, send_buf, 4);
recv_len += 1;
#endif
uint8_t idx = 0;
while (recv_len--)
{
while (RESET == SPI_GetFlagState(FLASH_SPI, SPI_FLAG_RFNE));
recv_buf[idx++] = SPI_ReceiveData(FLASH_SPI);
}
#if (SPI_MODE_EEPROM == SPI_MODE)
memcpy(pFlashId, recv_buf, 3);
#elif (SPI_MODE_FULLDUPLEX == SPI_MODE)
memcpy(pFlashId, &recv_buf[1], 3);
#endif
}
void spi_flash_busy_check(void)
{
uint8_t send_buf[2] = {SPI_FLASH_READ_STATUS_REG_1, 0};
uint8_t recv_len = 0;
uint8_t recv_data[2] = {0};
while (1)
{
SPI_SendBuffer(FLASH_SPI, send_buf, 2);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_BUSY) == SET);
recv_len = SPI_GetRxFIFOLen(FLASH_SPI);
uint8_t i = 0;
while (recv_len--)
{
recv_data[i++] = SPI_ReceiveData(FLASH_SPI);
}
i = 0;
if ((recv_data[1] & 0x01) == 0)
{
break;
}
}
}
void spi_flash_write_enable(void)
{
uint8_t len = 0;
SPI_SendData(FLASH_SPI, SPI_FLASH_WRITE_ENABLE);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_BUSY) == SET);
len = SPI_GetRxFIFOLen(FLASH_SPI);
while (len--)
{
SPI_ReceiveData(FLASH_SPI);
}
}
void spi_flash_status_reg_write(uint8_t vStatus)
{
uint8_t len = 0;
uint8_t send_buf[2] = {SPI_FLASH_WRITE_STATUS_REG_1, 0};
send_buf[1] = vStatus & 0xff;
/* Enable write */
spi_flash_write_enable();
/* Write status register */
SPI_SendBuffer(FLASH_SPI, send_buf, 2);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_BUSY) == SET);
len = SPI_GetRxFIFOLen(FLASH_SPI);
while (len--)
{
SPI_ReceiveData(FLASH_SPI);
}
spi_flash_busy_check();
}
void spi_flash_sector_erase(uint32_t vAddress)
{
uint8_t send_buf[4] = {SPI_FLASH_SECTOR_ERASE, 0, 0, 0};
uint8_t recv_len = 0;
send_buf[1] = (vAddress >> 16) & 0xff;
send_buf[2] = (vAddress >> 8) & 0xff;
send_buf[3] = vAddress & 0xff;
/* enable write */
spi_flash_write_enable();
/* erase data */
SPI_SendBuffer(FLASH_SPI, send_buf, 4);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_BUSY) == SET);
recv_len = SPI_GetRxFIFOLen(FLASH_SPI);
while (recv_len--)
{
SPI_ReceiveData(FLASH_SPI);
}
spi_flash_busy_check();
}
void spi_flash_block_erase(uint32_t vAddress)
{
uint8_t send_buf[4] = {SPI_FLASH_BLOCK_ERASE_32K, 0, 0, 0};
uint8_t recv_len = 0;
send_buf[1] = (vAddress >> 16) & 0xff;
send_buf[2] = (vAddress >> 8) & 0xff;
send_buf[3] = vAddress & 0xff;
/* Enable write */
spi_flash_write_enable();
/* erase data */
SPI_SendBuffer(FLASH_SPI, send_buf, 4);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_BUSY) == SET);
recv_len = SPI_GetRxFIFOLen(FLASH_SPI);
while (recv_len--)
{
SPI_ReceiveData(FLASH_SPI);
}
spi_flash_busy_check();
}
void spi_flash_chip_erase(void)
{
uint8_t recv_len = 0;
/* Enable write */
spi_flash_write_enable();
SPI_SendData(FLASH_SPI, SPI_FLASH_CHIP_ERASE);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_BUSY) == SET);
recv_len = SPI_GetRxFIFOLen(FLASH_SPI);
while (recv_len--)
{
SPI_ReceiveData(FLASH_SPI);
}
spi_flash_busy_check();
}
void spi_flash_page_write(uint32_t vWriteAddr, uint8_t *pBuffer, uint16_t vLength)
{
uint16_t send_data_len = vLength;
uint8_t recv_data_len = 0;
uint8_t send_buf[4] = {SPI_FLASH_PAGE_PROGRAM, 0, 0, 0};
send_buf[1] = (vWriteAddr >> 16) & 0xff;
send_buf[2] = (vWriteAddr >> 8) & 0xff;
send_buf[3] = vWriteAddr & 0xff;
if (vLength > SPI_FLASH_PAGE_SIZE)
{
send_data_len = SPI_FLASH_PAGE_SIZE;
}
/* Enable write */
spi_flash_write_enable();
SPI_SendBuffer(FLASH_SPI, send_buf, 4);
SPI_SendBuffer(FLASH_SPI, pBuffer, send_data_len);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_BUSY) == SET);
recv_data_len = SPI_GetRxFIFOLen(FLASH_SPI);
while (recv_data_len--)
{
SPI_ReceiveData(FLASH_SPI);
}
spi_flash_busy_check();
}
void spi_flash_buffer_write(uint32_t vWriteAddr, uint8_t *pBuffer, uint16_t vLength)
{
uint32_t write_addr = vWriteAddr;
uint8_t *p_write_data = pBuffer;
uint16_t write_data_len = vLength;
uint8_t offset = vWriteAddr % SPI_FLASH_PAGE_SIZE;
uint8_t free_len = SPI_FLASH_PAGE_SIZE - offset;
uint8_t page_num = vLength / SPI_FLASH_PAGE_SIZE;
uint8_t remain_len = vLength % SPI_FLASH_PAGE_SIZE;
if (offset == 0)
{
if (page_num == 0) // write_data_len < SPI_FLASH_PAGE_SIZE
{
spi_flash_page_write(write_addr, p_write_data, remain_len);
}
else // write_data_len > SPI_FLASH_PAGE_SIZE
{
while (page_num--)
{
spi_flash_page_write(write_addr, p_write_data, SPI_FLASH_PAGE_SIZE);
write_addr += SPI_FLASH_PAGE_SIZE;
p_write_data += SPI_FLASH_PAGE_SIZE;
}
spi_flash_page_write(write_addr, p_write_data, remain_len);
}
}
else // write_addr is not SPI_FLASH_PAGE_SIZE aligned
{
if (page_num == 0)
{
if (remain_len > free_len) /* (write_data_len + write_addr) > SPI_FLASH_PAGE_SIZE */
{
uint8_t temp = remain_len - free_len;
spi_flash_page_write(write_addr, p_write_data, free_len);
write_addr += free_len;
p_write_data += free_len;
spi_flash_page_write(vWriteAddr, p_write_data, temp);
}
else
{
spi_flash_page_write(write_addr, p_write_data, write_data_len);
}
}
else /* NumByteToWrite > SPI_FLASH_PAGE_SIZE */
{
write_data_len -= free_len;
page_num = write_data_len / SPI_FLASH_PAGE_SIZE;
remain_len = write_data_len % SPI_FLASH_PAGE_SIZE;
spi_flash_page_write(write_addr, p_write_data, free_len);
write_addr += free_len;
p_write_data += free_len;
while (page_num--)
{
spi_flash_page_write(write_addr, p_write_data, SPI_FLASH_PAGE_SIZE);
write_addr += SPI_FLASH_PAGE_SIZE;
p_write_data += SPI_FLASH_PAGE_SIZE;
}
if (remain_len != 0)
{
spi_flash_page_write(write_addr, p_write_data, remain_len);
}
}
}
}
void spi_flash_read(uint8_t vReadCmd, uint32_t vReadAddr, uint8_t *pBuffer, uint16_t vLength)
{
uint8_t send_buf[10] = {0};
uint8_t send_len = 0;
uint16_t recv_len = 0;
if (SPI_FLASH_READ_DATA == vReadCmd)
{
send_len = 4;
}
else if (SPI_FLASH_FAST_READ == vReadCmd)
{
send_len = 5;
}
send_buf[0] = vReadCmd;
send_buf[1] = (vReadAddr >> 16) & 0xFF;
send_buf[2] = (vReadAddr >> 8) & 0xFF;
send_buf[3] = (vReadAddr) & 0xFF;
SPI_SendBuffer(FLASH_SPI, send_buf, send_len);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_RFNE) == RESET);
for (uint8_t i = 0; i < send_len; i++)
{
SPI_ReceiveData(FLASH_SPI);//dummy read data
}
recv_len = vLength;
while (recv_len--)
{
SPI_SendBuffer(FLASH_SPI, &send_buf[9], 1);
while (SPI_GetFlagState(FLASH_SPI, SPI_FLAG_RFNE) == RESET);
*pBuffer++ = SPI_ReceiveData(FLASH_SPI);
}
}
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