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STM32 SPI driver optimization. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2427 35acf78f-673a-0410-8e92-d51de3d6d3f4
This commit is contained in:
gdisirio 2010-11-25 20:45:15 +00:00
parent c852dcb3c9
commit 06593fd396
2 changed files with 14 additions and 12 deletions
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24
os/hal/platforms/STM32/spi_lld.c
View File

@ -391,10 +391,9 @@ void spi_lld_unselect(SPIDriver *spip) {
void spi_lld_ignore(SPIDriver *spip, size_t n) {
dmaChannelSetup(spip->spd_dmarx, n, &dummyrx,
spip->spd_dmaccr | DMA_CCR1_TCIE);
spip->spd_dmaccr | DMA_CCR1_TCIE | DMA_CCR1_EN);
dmaChannelSetup(spip->spd_dmatx, n, &dummytx,
spip->spd_dmaccr | DMA_CCR1_DIR);
dma_start(spip);
spip->spd_dmaccr | DMA_CCR1_DIR | DMA_CCR1_EN);
}
/**
@ -416,10 +415,11 @@ void spi_lld_exchange(SPIDriver *spip, size_t n,
const void *txbuf, void *rxbuf) {
dmaChannelSetup(spip->spd_dmarx, n, rxbuf,
spip->spd_dmaccr | DMA_CCR1_TCIE | DMA_CCR1_MINC);
spip->spd_dmaccr | DMA_CCR1_TCIE | DMA_CCR1_MINC |
DMA_CCR1_EN);
dmaChannelSetup(spip->spd_dmatx, n, txbuf,
spip->spd_dmaccr | DMA_CCR1_DIR | DMA_CCR1_MINC);
dma_start(spip);
spip->spd_dmaccr | DMA_CCR1_DIR | DMA_CCR1_MINC |
DMA_CCR1_EN);
}
/**
@ -438,10 +438,10 @@ void spi_lld_exchange(SPIDriver *spip, size_t n,
void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf) {
dmaChannelSetup(spip->spd_dmarx, n, &dummyrx,
spip->spd_dmaccr | DMA_CCR1_TCIE);
spip->spd_dmaccr | DMA_CCR1_TCIE | DMA_CCR1_EN);
dmaChannelSetup(spip->spd_dmatx, n, txbuf,
spip->spd_dmaccr | DMA_CCR1_DIR | DMA_CCR1_MINC);
dma_start(spip);
spip->spd_dmaccr | DMA_CCR1_DIR | DMA_CCR1_MINC |
DMA_CCR1_EN);
}
/**
@ -460,10 +460,10 @@ void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf) {
void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf) {
dmaChannelSetup(spip->spd_dmarx, n, rxbuf,
spip->spd_dmaccr | DMA_CCR1_TCIE | DMA_CCR1_MINC);
spip->spd_dmaccr | DMA_CCR1_TCIE | DMA_CCR1_MINC |
DMA_CCR1_EN);
dmaChannelSetup(spip->spd_dmatx, n, &dummytx,
spip->spd_dmaccr | DMA_CCR1_DIR);
dma_start(spip);
spip->spd_dmaccr | DMA_CCR1_DIR | DMA_CCR1_EN);
}
/**

2
readme.txt
View File

@ -92,6 +92,8 @@
- NEW: Added demo for the ST STM8L-Discovery kit.
- NEW: Added support for the STM32 Value Line to the HAL.
- NEW: Added demo for the ST STM32VL-Discovery kit.
- OPT: STM32 SPI driver implementation improved, reduced latency when
starting a transfer.
- CHANGE: Improved the STM32 HAL to support multiple sub-families, at compile
time now it is possible to test the presence of any single peripheral into
the specified STM32 device.