int readfromspi_dma
(
uint16 headerLength,
const uint8 *headerBuffer,
uint32 readlength,
uint8 *readBuffer
)
{
uint8 spiBuffer[64] = "";
uint16 counter;
int stat ;
#ifdef SAFE_DMA_AND_BUFF
uint16 count;
count = (uint16)(headerLength + readlength);
if (count > MAX_DMABUF_SIZE )
{
return DWT_ERROR;
}
#endif
stat = decamutexon() ;
//PORT_SPI_CLEAR_CS_FAST // give extra time for SPI slave device
port_SPI3_set_chip_select();
HAL_SPI_TransmitReceive_DMA(&hspi3, headerBuffer, tmp_buf, count);
while(DMA_RX_CH->NDTR !=0); //pool until last clock from SPI_RX
while((SPI3->SR & (1 << 0)) != 0); // wait while RXNE flag is not 1 (RX is not empty)
//while((SPI3->SR & (1 << 7)) != 0); // wait while BSY flag is 1 (SPI is busy)
//result of read operation
for (count=headerLength; count<(headerLength+readlength); count++)
{
*readBuffer++ = tmp_buf[count];
}
port_SPI3_clear_chip_select();
//PORT_SPI_SET_CS_FAST
decamutexoff(stat);
return DWT_SUCCESS;
}
int writetospi_dma
(
uint16 headerLength,
const uint8 *headerBuffer,
uint32 bodylength,
const uint8 *bodyBuffer
)
{
int stat ;
#ifdef SAFE_DMA_AND_BUFF
if ((headerLength + bodylength) > MAX_DMABUF_SIZE)
{
return DWT_ERROR;
}
#endif
stat = decamutexon() ;
/* check spi_transaction finished */
// while((SPIx->SR & SPI_I2S_FLAG_BSY) !=0 );
PORT_SPI_CLEAR_CS_FAST // give extra time for SPI slave device
DMA_TX_CH->CPAR =(uint32) &(SPIx->DR) ;
/*header*/
DMA_TX_CH->CMAR = (uint32)(headerBuffer) ;
DMA_TX_CH->CNDTR = headerLength ;
PORT_DMA_START_TX_FAST /* Start transfer */
while((DMA_TX_CH->CNDTR) !=0);/* pool until last clock from SPI_TX register done */
PORT_DMA_STOP_TX_FAST /* do not wait SPI finished cause SPI slow. perform switching on next buffer while spi transaction in wire */
/*data*/
DMA_TX_CH->CMAR = (uint32)(bodyBuffer);
DMA_TX_CH->CNDTR = bodylength ;
PORT_DMA_START_TX_FAST /* Start transfer */
while((DMA_TX_CH->CNDTR) !=0);/* pool until last clock from SPI_TX register done */
while((SPIx->SR & SPI_I2S_FLAG_BSY) !=0 );/* Wait until last byte of transmission will leave SPI wire */
PORT_DMA_STOP_TX_FAST
/* finish */
PORT_SPI_SET_CS_FAST
SPIx->DR; // perform a dummy read operation to clear OverRun & RxNe flags in SPI SR register
decamutexoff(stat);
return DWT_SUCCESS;
}
/*! ------------------------------------------------------------------------------------------------------------------
* Function: writetospi()
*
* Low level abstract function to write to the SPI
* Takes two separate byte buffers for write header and write data
* returns 0 for success, or -1 for error
*/
int writetospi
(
uint16 headerLength,
const uint8 *headerBuffer,
uint32 bodylength,
const uint8 *bodyBuffer
)
{
int i=0;
decaIrqStatus_t stat ;
stat = decamutexon() ;
/* Wait for SPIx Tx buffer empty */
//while (port_SPIx_busy_sending());
dw_set_device_select(); //cs low
for(i=0; i<headerLength; i++)
{
while (SPI_I2S_GetFlagStatus(DW1000_SPI, SPI_I2S_FLAG_TXE) == RESET){}
SPI_I2S_SendData(DW1000_SPI, headerBuffer[i]);
//port_SPIx_send_data(headerBuffer[i]); //send data on the SPI
while (SPI_I2S_GetFlagStatus(DW1000_SPI, SPI_I2S_FLAG_RXNE) == RESET){}
SPI_I2S_ReceiveData(DW1000_SPI);
}
for(i=0; i<bodylength; i++)
{
while (SPI_I2S_GetFlagStatus(DW1000_SPI, SPI_I2S_FLAG_TXE) == RESET){}
SPI_I2S_SendData(DW1000_SPI, bodyBuffer[i]);
//port_SPIx_send_data(bodyBuffer[i]); //send data on the SPI
while (SPI_I2S_GetFlagStatus(DW1000_SPI, SPI_I2S_FLAG_RXNE) == RESET){}
SPI_I2S_ReceiveData(DW1000_SPI);
//while (port_SPIx_no_data()); //wait for rx buffer to fill
//port_SPIx_receive_data(); //this clears RXNE bit
}
dw_reset_device_select(); //CS high
decamutexoff(stat) ;
return 0;
} // end writetospi()
/*! ------------------------------------------------------------------------------------------------------------------
* Function: readfromspi()
*
* Low level abstract function to read from the SPI
* Takes two separate byte buffers for write header and read data
* returns the offset into read buffer where first byte of read data may be found,
* or returns -1 if there was an error
*/
int readfromspi
(
uint16 headerLength,
const uint8 *headerBuffer,
uint32 readlength,
uint8 *readBuffer
)
{
int i=0;
decaIrqStatus_t stat ;
stat = decamutexon() ;
/* Wait for SPIx Tx buffer empty */
//while (port_SPIx_busy_sending());
dw_set_device_select(); //CS low
for(i=0; i<headerLength; i++)
{
while (SPI_I2S_GetFlagStatus(DW1000_SPI, SPI_I2S_FLAG_TXE) == RESET){}
SPI_I2S_SendData(DW1000_SPI, headerBuffer[i]);
//port_SPIx_send_data(headerBuffer[i]); //send data on the SPI
while (SPI_I2S_GetFlagStatus(DW1000_SPI, SPI_I2S_FLAG_RXNE) == RESET){}
SPI_I2S_ReceiveData(DW1000_SPI);
}
for(i=0; i<readlength; i++)
{
while (SPI_I2S_GetFlagStatus(DW1000_SPI, SPI_I2S_FLAG_TXE) == RESET){}
SPI_I2S_SendData(DW1000_SPI, 0);
//port_SPIx_send_data(headerBuffer[i]); //send data on the SPI
while (SPI_I2S_GetFlagStatus(DW1000_SPI, SPI_I2S_FLAG_RXNE) == RESET){}
readBuffer[i] = SPI_I2S_ReceiveData(DW1000_SPI);
}
dw_reset_device_select(); //CS high
decamutexoff(stat) ;
return 0;
} // end readfromspi()
int readfromspi_serial
(
uint16 headerLength,
const uint8 *headerBuffer,
uint32 readlength,
uint8 *readBuffer
)
{
int i=0;
uint8 temp;
decaIrqStatus_t stat ;
stat = decamutexon() ;
/* Wait for SPIx Tx buffer empty */
//while (port_SPIx_busy_sending());
SPIx_CS_GPIO->BSRR = SPIx_CS;
for(i=0; i<headerLength; i++)
{
SPIx->DR = headerBuffer[i];
while((SPIx->SR & SPI_FLAG_RXNE) == (uint16_t)RESET);
temp = SPIx->DR ;
}
for(i=0; i<readlength; i++)
{
SPIx->DR = 0;
while((SPIx->SR & SPI_FLAG_RXNE) == (uint16_t)RESET);
readBuffer[i] = SPIx->DR ;//port_SPIx_receive_data(); //this clears RXNE bit
}
SPIx_CS_GPIO->BSRR = SPIx_CS;
decamutexoff(stat) ;
return 0;
} // end readfromspi()
int writetospi_serial
(
uint16 headerLength,
const uint8 *headerBuffer,
uint32 bodylength,
const uint8 *bodyBuffer
)
{
int i=0;
decaIrqStatus_t stat ;
stat = decamutexon() ;
SPIx_CS_GPIO->BSRR = SPIx_CS;
for(i=0; i<headerLength; i++)
{
SPIx->DR = headerBuffer[i];
while ((SPIx->SR & SPI_FLAG_RXNE) == (uint16_t)RESET);
SPIx->DR ;
}
for(i=0; i<bodylength; i++)
{
SPIx->DR = bodyBuffer[i];
while((SPIx->SR & SPI_FLAG_RXNE) == (uint16_t)RESET);
SPIx->DR ;
}
SPIx_CS_GPIO->BSRR = SPIx_CS;
decamutexoff(stat) ;
return 0;
} // end writetospi()
int writetospi_dma
(
uint16 headerLength,
const uint8 *headerBuffer,
uint32 bodylength,
const uint8 *bodyBuffer
)
{
int stat ;
#ifdef SAFE_DMA_AND_BUFF
if ((headerLength + bodylength) > MAX_DMABUF_SIZE)
{
return DWT_ERROR;
}
#endif
stat = decamutexon() ;
memcpy(&tmp_buf[0], headerBuffer, headerLength);
memcpy(&tmp_buf[headerLength], bodyBuffer, bodylength);
port_SPI3_set_chip_select();
HAL_SPI_Transmit_DMA(&hspi3, tmp_buf, headerLength+bodylength);
while(DMA_TX_CH->NDTR !=0); //pool until last clock from SPI_RX
while((SPI3->SR & (1 << 1)) == 0); // wait while TXE flag is 0 (TX is not empty)
//while((SPI3->SR & (1 << 7)) != 0); // wait while BSY flag is 1 (SPI is busy)
port_SPI3_clear_chip_select();
//PORT_SPI_SET_CS_FAST
decamutexoff(stat);
return DWT_SUCCESS;
}
int readfromspi_dma
(
uint16 headerLength,
const uint8 *headerBuffer,
uint32 readlength,
uint8 *readBuffer
)
{
int stat ;
#ifdef SAFE_DMA_AND_BUFF
uint16 count;
count = (uint16)(headerLength + readlength);
if (count > MAX_DMABUF_SIZE )
{
return DWT_ERROR;
}
#endif
stat = decamutexon() ;
/* check any spi_transaction finished */
// while((SPIx->SR & SPI_I2S_FLAG_BSY) !=0 );
// do not use library function cause it slow
PORT_SPI_CLEAR_CS_FAST // give extra time for SPI slave device
DMA_TX_CH->CMAR = (uint32)(headerBuffer); // no matter what we send to spi after header when perform a reading operation
DMA_RX_CH->CPAR = DMA_TX_CH->CPAR = (uint32)&(SPIx->DR);
#ifdef SAFE_DMA_AND_BUFF
SPIx->CR2 |= (SPI_I2S_DMAReq_Tx | SPI_I2S_DMAReq_Rx) ; /* connect SPI_Tx & SPI_Rx to DMA */
DMA_RX_CH->CMAR = (uint32)(&tmp_buf) ; /* read buffer */
DMA_RX_CH->CNDTR = DMA_TX_CH->CNDTR = count ; //length
/* Start write/read transfer*/
/* read data */
PORT_DMA_START_RX_FAST
PORT_DMA_START_TX_FAST
while(DMA_RX_CH->CNDTR !=0); /* pool until last clock from SPI_RX */
PORT_DMA_STOP_TX_FAST
PORT_DMA_STOP_RX_FAST
/* result of read operation*/
for (count=headerLength; count<(headerLength+readlength); count++)
{
*readBuffer++ = tmp_buf[count];
}
#else
SPIx->CR2 |= (SPI_I2S_DMAReq_Tx | SPI_I2S_DMAReq_Rx) ; /* connect SPI_Tx & SPI_Rx to DMA */
DMA_RX_CH->CMAR = (uint32) readBuffer ; /* read buffer addr */
DMA_TX_CH->CNDTR = headerLength+readlength;
DMA_RX_CH->CNDTR = headerLength;
/* Start. write command */
/* DMA_RX Disable Memory increment and Start */
DMA_RX_CH->CCR = DMA_CCR1_EN | /* start Rx */
DMA_DIR_PeripheralSRC | DMA_PeripheralInc_Disable | DMA_MemoryInc_Disable |\
DMA_PeripheralDataSize_Byte | DMA_MemoryDataSize_Byte | DMA_Mode_Normal |\
DMA_Priority_High | DMA_M2M_Disable ;
PORT_DMA_START_TX_FAST
while(DMA_RX_CH->CNDTR !=0); /* pool until last clock from SPI_RX */
PORT_DMA_STOP_RX_FAST
DMA_RX_CH->CNDTR = readlength; /* read data length */
DMA_RX_CH->CCR |= (DMA_MemoryInc_Enable); /* DMA_Rx Enable Memory increment */
/* DMA_Rx should be started after new readlength and changing of Memory increment mode */
PORT_DMA_START_RX_FAST
while(DMA_RX_CH->CNDTR !=0); /* pool until last clock from SPI_RX */
PORT_DMA_STOP_TX_FAST
PORT_DMA_STOP_RX_FAST
#endif
PORT_SPI_SET_CS_FAST
SPIx->CR2 &= ~(SPI_I2S_DMAReq_Rx) ; //Disconnect Rx from DMA_SPI !
decamutexoff(stat);
return DWT_SUCCESS;
}