136 lines
4.0 KiB
C++
136 lines
4.0 KiB
C++
#include "AT45DB.h"
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const byte Tx_Buffer[] = "STM32F10x SPI Firmware Library Example: communication with an AT45DB SPI FLASH";
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Spi* _spi;
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#define READ 0xD2 /* Read from Memory instruction */
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#define WRITE 0x82 /* Write to Memory instruction */
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#define RDID 0x9F /* Read identification */
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#define RDSR 0xD7 /* Read Status Register instruction */
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#define SE 0x7C /* Sector Erase instruction */
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#define PE 0x81 /* Page Erase instruction */
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#define RDY_Flag 0x80 /* Ready/busy(1/0) status flag */
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#define Dummy_Byte 0xA5
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void SPI_FLASH_WaitForEnd(void)
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{
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uint8_t FLASH_Status = 0;
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_spi->Start();
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/* Send "Read Status Register" instruction */
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_spi->Write(RDSR);
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/* Loop as long as the memory is busy with a write cycle */
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do
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{
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/* Send a dummy byte to generate the clock needed by the FLASH
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and put the value of the status register in FLASH_Status variable */
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FLASH_Status = _spi->Write(Dummy_Byte);
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}
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while ((FLASH_Status & RDY_Flag) == RESET); /* Busy in progress */
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_spi->Stop();
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}
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void SPI_FLASH_PageWrite(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t NumByteToWrite)
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{
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_spi->Start();
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/* Send "Write to Memory " instruction */
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_spi->Write(WRITE);
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/* Send WriteAddr high nibble address byte to write to */
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_spi->Write((WriteAddr & 0xFF0000) >> 16);
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/* Send WriteAddr medium nibble address byte to write to */
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_spi->Write((WriteAddr & 0xFF00) >> 8);
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/* Send WriteAddr low nibble address byte to write to */
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_spi->Write(WriteAddr & 0xFF);
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/* while there is data to be written on the FLASH */
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while (NumByteToWrite--)
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{
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/* Send the current byte */
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_spi->Write(*pBuffer);
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/* Point on the next byte to be written */
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pBuffer++;
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}
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_spi->Stop();
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SPI_FLASH_WaitForEnd();
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}
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void SPI_FLASH_BufferRead(uint8_t* pBuffer, uint32_t ReadAddr, uint16_t NumByteToRead)
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{
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_spi->Start();
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/* Send "Read from Memory " instruction */
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_spi->Write(READ);
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/* Send ReadAddr high nibble address byte to read from */
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_spi->Write((ReadAddr & 0xFF0000) >> 16);
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/* Send ReadAddr medium nibble address byte to read from */
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_spi->Write((ReadAddr& 0xFF00) >> 8);
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/* Send ReadAddr low nibble address byte to read from */
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_spi->Write(ReadAddr & 0xFF);
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/* Read a byte from the FLASH */
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_spi->Write(Dummy_Byte);
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/* Read a byte from the FLASH */
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_spi->Write(Dummy_Byte);
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/* Read a byte from the FLASH */
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_spi->Write(Dummy_Byte);
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/* Read a byte from the FLASH */
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_spi->Write(Dummy_Byte);
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while (NumByteToRead--) /* while there is data to be read */
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{
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/* Read a byte from the FLASH */
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*pBuffer = _spi->Write(Dummy_Byte);
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/* Point to the next location where the byte read will be saved */
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pBuffer++;
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}
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_spi->Stop();
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}
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void TestAT45DB()
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{
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Spi spi(SPI2, 9000000, true);
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_spi = &spi;
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AT45DB sf(&spi);
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debug_printf("AT45DB ID=0x%08X PageSize=%d\r\n", sf.ID, sf.PageSize);
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int size = ArrayLength(Tx_Buffer);
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debug_printf("DataSize=%d\r\n", size);
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uint addr = 0x00000;
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if(sf.ErasePage(addr))
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debug_printf("擦除0x%08x成功\r\n", addr);
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else
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debug_printf("擦除0x%08x失败\r\n", addr);
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byte Rx_Buffer[80];
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for(int i=0; i<9; i++)
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{
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//sf.ErasePage(addr);
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SPI_FLASH_PageWrite((byte*)Tx_Buffer, addr, size);
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//SPI_FLASH_BufferRead(Rx_Buffer, addr, size);
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//memset(Rx_Buffer, 0, ArrayLength(Rx_Buffer));
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//if(!sf.Write(addr, Tx_Buffer, size)) debug_printf("写入0x%08X失败！\r\n", addr);
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SPI_FLASH_BufferRead(Rx_Buffer, addr, size);
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//if(!sf.ReadPage(addr, Rx_Buffer, size)) debug_printf("读取0x%08X失败！\r\n", addr);
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memset(Rx_Buffer, 0, ArrayLength(Rx_Buffer));
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addr += size;
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}
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for(int i=0; i<size; i++)
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{
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if(Rx_Buffer[i] != Tx_Buffer[i]) debug_printf("Error %d ", i);
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}
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debug_printf("\r\nFinish!\r\n");
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}
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