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Add ability to check for SPI bus busy condition

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This commit is contained in:
Nicholas Sherlock 2015-10-22 17:26:16 +13:00 • committed by borisbstyle
parent 77f0fb716d
commit 264c094eef
2 changed files with 15 additions and 0 deletions
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14
src/main/drivers/bus_spi.c
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@ -422,6 +422,20 @@ uint8_t spiTransferByte(SPI_TypeDef *instance, uint8_t data)
#endif #endif
} }
/**
* Return true if the bus is currently in the middle of a transmission.
*/
bool spiIsBusBusy(SPI_TypeDef *instance)
{
#ifdef STM32F303xC
return SPI_GetTransmissionFIFOStatus(instance) != SPI_TransmissionFIFOStatus_Empty || SPI_I2S_GetFlagStatus(instance, SPI_I2S_FLAG_BSY) == SET;
#endif
#ifdef STM32F10X
return SPI_I2S_GetFlagStatus(instance, SPI_I2S_FLAG_TXE) == RESET || SPI_I2S_GetFlagStatus(instance, SPI_I2S_FLAG_BSY) == SET;
#endif
}
bool spiTransfer(SPI_TypeDef *instance, uint8_t *out, const uint8_t *in, int len) bool spiTransfer(SPI_TypeDef *instance, uint8_t *out, const uint8_t *in, int len)
{ {
uint16_t spiTimeout = 1000; uint16_t spiTimeout = 1000;

1
src/main/drivers/bus_spi.h
View file

@ -24,6 +24,7 @@
bool spiInit(SPI_TypeDef *instance); bool spiInit(SPI_TypeDef *instance);
void spiSetDivisor(SPI_TypeDef *instance, uint16_t divisor); void spiSetDivisor(SPI_TypeDef *instance, uint16_t divisor);
uint8_t spiTransferByte(SPI_TypeDef *instance, uint8_t in); uint8_t spiTransferByte(SPI_TypeDef *instance, uint8_t in);
bool spiIsBusBusy(SPI_TypeDef *instance);
bool spiTransfer(SPI_TypeDef *instance, uint8_t *out, const uint8_t *in, int len); bool spiTransfer(SPI_TypeDef *instance, uint8_t *out, const uint8_t *in, int len);