diff options
Diffstat (limited to 'src/stm32lib/examples/SPI/M25P64_FLASH/spi_flash.c')
| -rwxr-xr-x | src/stm32lib/examples/SPI/M25P64_FLASH/spi_flash.c | 482 |
1 files changed, 0 insertions, 482 deletions
diff --git a/src/stm32lib/examples/SPI/M25P64_FLASH/spi_flash.c b/src/stm32lib/examples/SPI/M25P64_FLASH/spi_flash.c deleted file mode 100755 index e19e7c1..0000000 --- a/src/stm32lib/examples/SPI/M25P64_FLASH/spi_flash.c +++ /dev/null @@ -1,482 +0,0 @@ -/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
-* File Name : spi_flash.c
-* Author : MCD Application Team
-* Version : V2.0.1
-* Date : 06/13/2008
-* Description : This file provides a set of functions needed to manage the
-* communication between SPI peripheral and SPI M25P64 FLASH.
-********************************************************************************
-* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
-* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
-* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
-* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
-* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
-* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
-*******************************************************************************/
-
-/* Includes ------------------------------------------------------------------*/
-#include "spi_flash.h"
-
-/* Private typedef -----------------------------------------------------------*/
-#define SPI_FLASH_PageSize 0x1006
-
-/* Private define ------------------------------------------------------------*/
-#define WRITE 0x02 /* Write to Memory instruction */
-#define WRSR 0x01 /* Write Status Register instruction */
-#define WREN 0x06 /* Write enable instruction */
-
-#define READ 0x03 /* Read from Memory instruction */
-#define RDSR 0x05 /* Read Status Register instruction */
-#define RDID 0x9F /* Read identification */
-#define SE 0xD8 /* Sector Erase instruction */
-#define BE 0xC7 /* Bulk Erase instruction */
-
-#define WIP_Flag 0x01 /* Write In Progress (WIP) flag */
-
-#define Dummy_Byte 0xA5
-
-/* Private macro -------------------------------------------------------------*/
-/* Private variables ---------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_Init
-* Description : Initializes the peripherals used by the SPI FLASH driver.
-* Input : None
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_Init(void)
-{
- SPI_InitTypeDef SPI_InitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
-
- /* Enable SPI1 and GPIO clocks */
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 | RCC_APB2Periph_GPIOA |
- RCC_APB2Periph_GPIO_CS, ENABLE);
-
- /* Configure SPI1 pins: SCK, MISO and MOSI */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- /* Configure I/O for Flash Chip select */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_CS;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_Init(GPIO_CS, &GPIO_InitStructure);
-
- /* Deselect the FLASH: Chip Select high */
- SPI_FLASH_CS_HIGH();
-
- /* SPI1 configuration */
- SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
- SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
- SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
- SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
- SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
- SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
- SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
- SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
- SPI_InitStructure.SPI_CRCPolynomial = 7;
- SPI_Init(SPI1, &SPI_InitStructure);
-
- /* Enable SPI1 */
- SPI_Cmd(SPI1, ENABLE);
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_SectorErase
-* Description : Erases the specified FLASH sector.
-* Input : SectorAddr: address of the sector to erase.
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_SectorErase(u32 SectorAddr)
-{
- /* Send write enable instruction */
- SPI_FLASH_WriteEnable();
-
- /* Sector Erase */
- /* Select the FLASH: Chip Select low */
- SPI_FLASH_CS_LOW();
- /* Send Sector Erase instruction */
- SPI_FLASH_SendByte(SE);
- /* Send SectorAddr high nibble address byte */
- SPI_FLASH_SendByte((SectorAddr & 0xFF0000) >> 16);
- /* Send SectorAddr medium nibble address byte */
- SPI_FLASH_SendByte((SectorAddr & 0xFF00) >> 8);
- /* Send SectorAddr low nibble address byte */
- SPI_FLASH_SendByte(SectorAddr & 0xFF);
- /* Deselect the FLASH: Chip Select high */
- SPI_FLASH_CS_HIGH();
-
- /* Wait the end of Flash writing */
- SPI_FLASH_WaitForWriteEnd();
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_BulkErase
-* Description : Erases the entire FLASH.
-* Input : None
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_BulkErase(void)
-{
- /* Send write enable instruction */
- SPI_FLASH_WriteEnable();
-
- /* Bulk Erase */
- /* Select the FLASH: Chip Select low */
- SPI_FLASH_CS_LOW();
- /* Send Bulk Erase instruction */
- SPI_FLASH_SendByte(BE);
- /* Deselect the FLASH: Chip Select high */
- SPI_FLASH_CS_HIGH();
-
- /* Wait the end of Flash writing */
- SPI_FLASH_WaitForWriteEnd();
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_PageWrite
-* Description : Writes more than one byte to the FLASH with a single WRITE
-* cycle(Page WRITE sequence). The number of byte can't exceed
-* the FLASH page size.
-* Input : - pBuffer : pointer to the buffer containing the data to be
-* written to the FLASH.
-* - WriteAddr : FLASH's internal address to write to.
-* - NumByteToWrite : number of bytes to write to the FLASH,
-* must be equal or less than "SPI_FLASH_PageSize" value.
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_PageWrite(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite)
-{
- /* Enable the write access to the FLASH */
- SPI_FLASH_WriteEnable();
-
- /* Select the FLASH: Chip Select low */
- SPI_FLASH_CS_LOW();
- /* Send "Write to Memory " instruction */
- SPI_FLASH_SendByte(WRITE);
- /* Send WriteAddr high nibble address byte to write to */
- SPI_FLASH_SendByte((WriteAddr & 0xFF0000) >> 16);
- /* Send WriteAddr medium nibble address byte to write to */
- SPI_FLASH_SendByte((WriteAddr & 0xFF00) >> 8);
- /* Send WriteAddr low nibble address byte to write to */
- SPI_FLASH_SendByte(WriteAddr & 0xFF);
-
- /* while there is data to be written on the FLASH */
- while (NumByteToWrite--)
- {
- /* Send the current byte */
- SPI_FLASH_SendByte(*pBuffer);
- /* Point on the next byte to be written */
- pBuffer++;
- }
-
- /* Deselect the FLASH: Chip Select high */
- SPI_FLASH_CS_HIGH();
-
- /* Wait the end of Flash writing */
- SPI_FLASH_WaitForWriteEnd();
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_BufferWrite
-* Description : Writes block of data to the FLASH. In this function, the
-* number of WRITE cycles are reduced, using Page WRITE sequence.
-* Input : - pBuffer : pointer to the buffer containing the data to be
-* written to the FLASH.
-* - WriteAddr : FLASH's internal address to write to.
-* - NumByteToWrite : number of bytes to write to the FLASH.
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_BufferWrite(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite)
-{
- u8 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0, temp = 0;
-
- Addr = WriteAddr % SPI_FLASH_PageSize;
- count = SPI_FLASH_PageSize - Addr;
- NumOfPage = NumByteToWrite / SPI_FLASH_PageSize;
- NumOfSingle = NumByteToWrite % SPI_FLASH_PageSize;
-
- if (Addr == 0) /* WriteAddr is SPI_FLASH_PageSize aligned */
- {
- if (NumOfPage == 0) /* NumByteToWrite < SPI_FLASH_PageSize */
- {
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);
- }
- else /* NumByteToWrite > SPI_FLASH_PageSize */
- {
- while (NumOfPage--)
- {
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);
- WriteAddr += SPI_FLASH_PageSize;
- pBuffer += SPI_FLASH_PageSize;
- }
-
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);
- }
- }
- else /* WriteAddr is not SPI_FLASH_PageSize aligned */
- {
- if (NumOfPage == 0) /* NumByteToWrite < SPI_FLASH_PageSize */
- {
- if (NumOfSingle > count) /* (NumByteToWrite + WriteAddr) > SPI_FLASH_PageSize */
- {
- temp = NumOfSingle - count;
-
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);
- WriteAddr += count;
- pBuffer += count;
-
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, temp);
- }
- else
- {
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);
- }
- }
- else /* NumByteToWrite > SPI_FLASH_PageSize */
- {
- NumByteToWrite -= count;
- NumOfPage = NumByteToWrite / SPI_FLASH_PageSize;
- NumOfSingle = NumByteToWrite % SPI_FLASH_PageSize;
-
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);
- WriteAddr += count;
- pBuffer += count;
-
- while (NumOfPage--)
- {
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);
- WriteAddr += SPI_FLASH_PageSize;
- pBuffer += SPI_FLASH_PageSize;
- }
-
- if (NumOfSingle != 0)
- {
- SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);
- }
- }
- }
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_BufferRead
-* Description : Reads a block of data from the FLASH.
-* Input : - pBuffer : pointer to the buffer that receives the data read
-* from the FLASH.
-* - ReadAddr : FLASH's internal address to read from.
-* - NumByteToRead : number of bytes to read from the FLASH.
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_BufferRead(u8* pBuffer, u32 ReadAddr, u16 NumByteToRead)
-{
- /* Select the FLASH: Chip Select low */
- SPI_FLASH_CS_LOW();
-
- /* Send "Read from Memory " instruction */
- SPI_FLASH_SendByte(READ);
-
- /* Send ReadAddr high nibble address byte to read from */
- SPI_FLASH_SendByte((ReadAddr & 0xFF0000) >> 16);
- /* Send ReadAddr medium nibble address byte to read from */
- SPI_FLASH_SendByte((ReadAddr& 0xFF00) >> 8);
- /* Send ReadAddr low nibble address byte to read from */
- SPI_FLASH_SendByte(ReadAddr & 0xFF);
-
- while (NumByteToRead--) /* while there is data to be read */
- {
- /* Read a byte from the FLASH */
- *pBuffer = SPI_FLASH_SendByte(Dummy_Byte);
- /* Point to the next location where the byte read will be saved */
- pBuffer++;
- }
-
- /* Deselect the FLASH: Chip Select high */
- SPI_FLASH_CS_HIGH();
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_ReadID
-* Description : Reads FLASH identification.
-* Input : None
-* Output : None
-* Return : FLASH identification
-*******************************************************************************/
-u32 SPI_FLASH_ReadID(void)
-{
- u32 Temp = 0, Temp0 = 0, Temp1 = 0, Temp2 = 0;
-
- /* Select the FLASH: Chip Select low */
- SPI_FLASH_CS_LOW();
-
- /* Send "RDID " instruction */
- SPI_FLASH_SendByte(0x9F);
-
- /* Read a byte from the FLASH */
- Temp0 = SPI_FLASH_SendByte(Dummy_Byte);
-
- /* Read a byte from the FLASH */
- Temp1 = SPI_FLASH_SendByte(Dummy_Byte);
-
- /* Read a byte from the FLASH */
- Temp2 = SPI_FLASH_SendByte(Dummy_Byte);
-
- /* Deselect the FLASH: Chip Select high */
- SPI_FLASH_CS_HIGH();
-
- Temp = (Temp0 << 16) | (Temp1 << 8) | Temp2;
-
- return Temp;
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_StartReadSequence
-* Description : Initiates a read data byte (READ) sequence from the Flash.
-* This is done by driving the /CS line low to select the device,
-* then the READ instruction is transmitted followed by 3 bytes
-* address. This function exit and keep the /CS line low, so the
-* Flash still being selected. With this technique the whole
-* content of the Flash is read with a single READ instruction.
-* Input : - ReadAddr : FLASH's internal address to read from.
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_StartReadSequence(u32 ReadAddr)
-{
- /* Select the FLASH: Chip Select low */
- SPI_FLASH_CS_LOW();
-
- /* Send "Read from Memory " instruction */
- SPI_FLASH_SendByte(READ);
-
- /* Send the 24-bit address of the address to read from -----------------------*/
- /* Send ReadAddr high nibble address byte */
- SPI_FLASH_SendByte((ReadAddr & 0xFF0000) >> 16);
- /* Send ReadAddr medium nibble address byte */
- SPI_FLASH_SendByte((ReadAddr& 0xFF00) >> 8);
- /* Send ReadAddr low nibble address byte */
- SPI_FLASH_SendByte(ReadAddr & 0xFF);
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_ReadByte
-* Description : Reads a byte from the SPI Flash.
-* This function must be used only if the Start_Read_Sequence
-* function has been previously called.
-* Input : None
-* Output : None
-* Return : Byte Read from the SPI Flash.
-*******************************************************************************/
-u8 SPI_FLASH_ReadByte(void)
-{
- return (SPI_FLASH_SendByte(Dummy_Byte));
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_SendByte
-* Description : Sends a byte through the SPI interface and return the byte
-* received from the SPI bus.
-* Input : byte : byte to send.
-* Output : None
-* Return : The value of the received byte.
-*******************************************************************************/
-u8 SPI_FLASH_SendByte(u8 byte)
-{
- /* Loop while DR register in not emplty */
- while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
-
- /* Send byte through the SPI1 peripheral */
- SPI_I2S_SendData(SPI1, byte);
-
- /* Wait to receive a byte */
- while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
-
- /* Return the byte read from the SPI bus */
- return SPI_I2S_ReceiveData(SPI1);
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_SendHalfWord
-* Description : Sends a Half Word through the SPI interface and return the
-* Half Word received from the SPI bus.
-* Input : Half Word : Half Word to send.
-* Output : None
-* Return : The value of the received Half Word.
-*******************************************************************************/
-u16 SPI_FLASH_SendHalfWord(u16 HalfWord)
-{
- /* Loop while DR register in not emplty */
- while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
-
- /* Send Half Word through the SPI1 peripheral */
- SPI_I2S_SendData(SPI1, HalfWord);
-
- /* Wait to receive a Half Word */
- while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
-
- /* Return the Half Word read from the SPI bus */
- return SPI_I2S_ReceiveData(SPI1);
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_WriteEnable
-* Description : Enables the write access to the FLASH.
-* Input : None
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_WriteEnable(void)
-{
- /* Select the FLASH: Chip Select low */
- SPI_FLASH_CS_LOW();
-
- /* Send "Write Enable" instruction */
- SPI_FLASH_SendByte(WREN);
-
- /* Deselect the FLASH: Chip Select high */
- SPI_FLASH_CS_HIGH();
-}
-
-/*******************************************************************************
-* Function Name : SPI_FLASH_WaitForWriteEnd
-* Description : Polls the status of the Write In Progress (WIP) flag in the
-* FLASH's status register and loop until write opertaion
-* has completed.
-* Input : None
-* Output : None
-* Return : None
-*******************************************************************************/
-void SPI_FLASH_WaitForWriteEnd(void)
-{
- u8 FLASH_Status = 0;
-
- /* Select the FLASH: Chip Select low */
- SPI_FLASH_CS_LOW();
-
- /* Send "Read Status Register" instruction */
- SPI_FLASH_SendByte(RDSR);
-
- /* Loop as long as the memory is busy with a write cycle */
- do
- {
- /* Send a dummy byte to generate the clock needed by the FLASH
- and put the value of the status register in FLASH_Status variable */
- FLASH_Status = SPI_FLASH_SendByte(Dummy_Byte);
-
- }
- while ((FLASH_Status & WIP_Flag) == SET); /* Write in progress */
-
- /* Deselect the FLASH: Chip Select high */
- SPI_FLASH_CS_HIGH();
-}
-
-/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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