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Code Issues Releases Activity

PiOS BMA180: Increase the comms speed for BMA180 and perfom SPI without

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callback.  This takes less time.
This commit is contained in:
James Cotton 2011-09-08 02:15:08 -05:00
parent d7ea1fc306
commit 0eb4fd113b
2 changed files with 12 additions and 3 deletions
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2
flight/INS/pios_board.c
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@ -176,7 +176,7 @@ static const struct pios_spi_cfg pios_spi_accel_cfg = {
.SPI_CRCPolynomial = 7,
.SPI_CPOL = SPI_CPOL_High,
.SPI_CPHA = SPI_CPHA_2Edge,
.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128,
.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4,
},
.use_crc = false,
.dma = {

13
flight/PiOS/STM32F2xx/pios_bma180.c
View File

@ -352,7 +352,12 @@ int32_t PIOS_BMA180_Test()
}
static uint8_t pios_bma180_dmabuf[8];
static void PIOS_BMA180_SPI_Callback()
/**
* @brief Take data from BMA180 read and parse it into structure
* Leaving this function here in case I want to go back to using
* callback but at higher speed this it is faster to just transfer
*/
static inline void PIOS_BMA180_SPI_Callback()
{
// TODO: Make this conversion depend on configuration scale
struct pios_bma180_data data;
@ -381,12 +386,16 @@ static void PIOS_BMA180_SPI_Callback()
* @brief IRQ Handler
*/
const static uint8_t pios_bma180_req_buf[7] = {BMA_X_LSB_ADDR | 0x80,0,0,0,0,0};
int32_t setup_time;
static void PIOS_BMA180_IRQHandler(void)
{
uint32_t timeval = PIOS_DELAY_GetRaw();
// If we can't get the bus then just move on for efficiency
if(PIOS_BMA180_ClaimBus() == 0)
PIOS_SPI_TransferBlock(PIOS_SPI_ACCEL,pios_bma180_req_buf,(uint8_t *) pios_bma180_dmabuf,
sizeof(pios_bma180_dmabuf), PIOS_BMA180_SPI_Callback);
sizeof(pios_bma180_dmabuf), NULL);
setup_time = PIOS_DELAY_DiffuS(timeval);
PIOS_BMA180_SPI_Callback();
}