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Updated SPI Flash write method. (Need more testing.) 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@541 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
kyle.hu.gz 2010-03-25 11:08:56 +00:00
parent 6768e183fc
commit ed3de73b65
1 changed files with 0 additions and 68 deletions
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68
bsp/stm32_radio/spi_flash.c
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@ -86,45 +86,6 @@ static void DMA_RxConfiguration(rt_uint32_t addr, rt_size_t size)
DMA_Cmd(DMA1_Channel3, ENABLE);
}
static void DMA_TxConfiguration(rt_uint32_t addr, rt_size_t size)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_ClearFlag(DMA1_FLAG_TC2 | DMA1_FLAG_TE2 | DMA1_FLAG_TC3 | DMA1_FLAG_TE3);
/* DMA Channel configuration ----------------------------------------------*/
DMA_Cmd(DMA1_Channel2, DISABLE);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&(SPI1->DR));
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)(&dummy);
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = size;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel2, &DMA_InitStructure);
/* DMA Channel configuration ----------------------------------------------*/
DMA_Cmd(DMA1_Channel3, DISABLE);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&(SPI1->DR));
DMA_InitStructure.DMA_MemoryBaseAddr = (u32) addr;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_BufferSize = size;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel3, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel3, ENABLE);
}
#endif
static uint8_t SPI_HostReadByte(void)
@ -245,29 +206,6 @@ static void read_page(uint32_t page, uint8_t *pHeader)
static void write_page(uint32_t page, uint8_t *pHeader)
{
#if SPI_FLASH_USE_DMA
rt_sem_take(&spi1_lock, RT_WAITING_FOREVER);
DMA_TxConfiguration((rt_uint32_t) pHeader, SECTOR_SIZE);
FLASH_CS_0();
SPI_HostWriteByte(AT45DB_MM_PAGE_PROG_THRU_BUFFER1);
SPI_HostWriteByte((uint8_t) (page >> 6));
SPI_HostWriteByte((uint8_t) (page << 2));
SPI_HostWriteByte(0x00);
SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
while (DMA_GetFlagStatus(DMA1_FLAG_TC3) == RESET);
FLASH_CS_1();
SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, DISABLE);
wait_busy();
rt_sem_release(&spi1_lock);
#else
uint16_t i;
rt_sem_take(&spi1_lock, RT_WAITING_FOREVER);
@ -289,7 +227,6 @@ static void write_page(uint32_t page, uint8_t *pHeader)
wait_busy();
rt_sem_release(&spi1_lock);
#endif
}
@ -348,12 +285,7 @@ static rt_size_t rt_spi_flash_write(rt_device_t dev, rt_off_t pos, const void* b
for (index = 0; index < nr; index++)
{
/* only supply single block write: block size 512Byte */
#if SPI_FLASH_USE_DMA
rt_memcpy(_spi_flash_buffer, ((rt_uint8_t *) buffer + index * SECTOR_SIZE), SECTOR_SIZE);
write_page((pos / SECTOR_SIZE + index), _spi_flash_buffer);
#else
write_page((pos / SECTOR_SIZE + index), ((rt_uint8_t *) buffer + index * SECTOR_SIZE));
#endif
}
return nr * SECTOR_SIZE;