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Optimization to the STM32 SPI driver. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2081 35acf78f-673a-0410-8e92-d51de3d6d3f4
This commit is contained in:
gdisirio 2010-07-22 20:26:22 +00:00
parent 99badd5494
commit 0ce4d551df
2 changed files with 5 additions and 4 deletions
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8
os/hal/platforms/STM32/spi_lld.c
View File

@ -294,15 +294,15 @@ void spi_lld_start(SPIDriver *spip) {
RCC->APB1ENR |= RCC_APB1ENR_SPI3EN; RCC->APB1ENR |= RCC_APB1ENR_SPI3EN;
} }
#endif #endif
/* DMA setup.*/
spip->spd_dmarx->CPAR = (uint32_t)&spip->spd_spi->DR;
spip->spd_dmatx->CPAR = (uint32_t)&spip->spd_spi->DR;
} }
/* SPI setup.*/ /* SPI setup.*/
spip->spd_spi->CR1 = spip->spd_config->spc_cr1 | SPI_CR1_MSTR; spip->spd_spi->CR1 = spip->spd_config->spc_cr1 | SPI_CR1_MSTR;
spip->spd_spi->CR2 = SPI_CR2_SSOE | SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN; spip->spd_spi->CR2 = SPI_CR2_SSOE | SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN;
/* DMA setup.*/
spip->spd_dmarx->CPAR = (uint32_t)&spip->spd_spi->DR;
spip->spd_dmatx->CPAR = (uint32_t)&spip->spd_spi->DR;
} }
/** /**

1
readme.txt
View File

@ -81,6 +81,7 @@
option is not compatible with the 64 bits stack alignment now default in option is not compatible with the 64 bits stack alignment now default in
the Cortex-Mx port. Note that the 64 bits alignment has a cost both as the Cortex-Mx port. Note that the 64 bits alignment has a cost both as
performance and as space but it is the "standard". performance and as space but it is the "standard".
- OPT: Small speed optimization in the STM32 SPI driver.
- Fixed various documentation errors. - Fixed various documentation errors.
*** 2.1.0 *** *** 2.1.0 ***