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Code Issues Releases Activity

CC-6 Fixed bug in flash read write addresses

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git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@2661 ebee16cc-31ac-478f-84a7-5cbb03baadba
This commit is contained in:
peabody124 2011-02-01 02:18:08 +00:00 committed by peabody124
parent e27c9c0b7a
commit ea91042f38
1 changed files with 30 additions and 4 deletions
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34
flight/PiOS/Common/pios_flash_w25x.c
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@ -20,6 +20,7 @@
#define W25X_DEVICE_ID 0x90
#define W25X_SECTOR_ERASE 0x20
#define W25X_PAGE_WRITE 0x02
#define W25X_CHIP_ERASE 0x60
#define W25X_STATUS_BUSY 0x01
#define W25X_STATUS_WRITEPROTECT 0x02
@ -37,6 +38,7 @@ static int8_t PIOS_Flash_W25X_ClaimBus();
static void PIOS_Flash_W25X_ReleaseBus();
static uint8_t PIOS_Flash_W25X_WriteEnable();
static uint8_t PIOS_Flash_W25X_Busy() ;
//static uint8_t PIOS_Flash_W25X_EraseChip();
/**
* @brief Claim the SPI bus for flash use and assert CS pin
@ -87,7 +89,6 @@ int8_t PIOS_Flash_W25X_Init()
{
PIOS_GPIO_Enable(PIOS_FLASH_CS_PIN);
device_type = PIOS_Flash_W25X_ReadID();
PIOS_Flash_W25X_WriteEnable();
return 0;
}
@ -148,6 +149,32 @@ int8_t PIOS_Flash_W25X_EraseSector(uint32_t addr)
return 0;
}
/**
* @brief Execute the whole chip
* @returns 0 if successful, -1 if unable to claim bus
*/
/*static uint8_t PIOS_Flash_W25X_EraseChip()
{
uint8_t ret;
uint8_t out[] = {W25X_CHIP_ERASE};
if((ret = PIOS_Flash_W25X_WriteEnable()) != 0)
return ret;
if(PIOS_Flash_W25X_ClaimBus() != 0)
return -1;
PIOS_SPI_TransferBlock(PIOS_SPI_FLASH,out,NULL,sizeof(out),NULL);
PIOS_Flash_W25X_ReleaseBus();
while(PIOS_Flash_W25X_Busy()) {
//TODO: Fail on timeout
#if defined(PIOS_INCLUDE_FREERTOS)
vTaskDelay(1);
#endif
}
return 0;
}*/
/**
* @brief Write one page of data (up to 256 bytes) aligned to a page start
* @param[in] addr Address in flash to write to
@ -161,6 +188,7 @@ int8_t PIOS_Flash_W25X_EraseSector(uint32_t addr)
int8_t PIOS_Flash_W25X_WriteData(uint32_t addr, uint8_t * data, uint16_t len)
{
uint8_t ret;
uint8_t out[4] = {W25X_PAGE_WRITE, (addr >> 16) & 0xff, (addr >> 8) & 0xff , addr & 0xff};
/* Can only write one page at a time */
if(len > 0x100)
@ -176,7 +204,6 @@ int8_t PIOS_Flash_W25X_WriteData(uint32_t addr, uint8_t * data, uint16_t len)
/* Execute write page command and clock in address. Keep CS asserted */
if(PIOS_Flash_W25X_ClaimBus() != 0)
return -1;
uint8_t out[] = {W25X_PAGE_WRITE, (addr >> 16) && 0xff, (addr >> 8) && 0xff , addr && 0xff};
PIOS_SPI_TransferBlock(PIOS_SPI_FLASH,out,NULL,sizeof(out),NULL);
/* Clock out data to flash */
@ -189,7 +216,6 @@ int8_t PIOS_Flash_W25X_WriteData(uint32_t addr, uint8_t * data, uint16_t len)
vTaskDelay(1);
#endif
}
return 0;
}
@ -199,7 +225,7 @@ int8_t PIOS_Flash_W25X_ReadData(uint32_t addr, uint8_t * data, uint16_t len)
return -1;
/* Execute read command and clock in address. Keep CS asserted */
uint8_t out[] = {W25X_READ_DATA, (addr >> 16) && 0xff, (addr >> 8) && 0xff , addr && 0xff};
uint8_t out[] = {W25X_READ_DATA, (addr >> 16) & 0xff, (addr >> 8) & 0xff , addr & 0xff};
PIOS_SPI_TransferBlock(PIOS_SPI_FLASH,out,NULL,sizeof(out),NULL);
/* Copy the transfer data to the buffer */