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Code Issues Releases Activity

spi: assert on invalid SPI device

Browse Source 
TransferByte API is simplified to either assert or
return the rx byte.

git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@999 ebee16cc-31ac-478f-84a7-5cbb03baadba
This commit is contained in:
stac 2010-07-04 02:21:00 +00:00 committed by stac
parent 1169514bf9
commit 4f8d81343f
1 changed files with 1 additions and 9 deletions
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10
flight/PiOS/STM32F10x/pios_spi.c
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@ -229,10 +229,6 @@ int32_t PIOS_SPI_RC_PinSet(uint8_t spi, uint8_t pin_value)
* Transfers a byte to SPI output and reads back the return value from SPI input
* \param[in] spi SPI number (0 or 1)
* \param[in] b the byte which should be transfered
* \return >= 0: the read byte
* \return -1 if disabled SPI port selected
* \return -2 if unsupported SPI port selected
* \return -3 if unsupported SPI mode configured via PIOS_SPI_TransferModeInit()
*/
int32_t PIOS_SPI_TransferByte(uint8_t spi, uint8_t b)
{
@ -242,11 +238,7 @@ int32_t PIOS_SPI_TransferByte(uint8_t spi, uint8_t b)
/* Get a handle for the device configuration */
spi_dev = find_spi_dev_by_id(spi);
if (!spi_dev) {
/* Undefined SPI port for this board (see pios_board.c) */
return -2;
}
PIOS_DEBUG_Assert(spi_dev);
/*
* Procedure taken from STM32F10xxx Reference Manual section 23.3.5