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ChibiOS
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I2S starts doing something. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6750 35acf78f-673a-0410-8e92-d51de3d6d3f4
This commit is contained in:
gdisirio 2014-03-04 10:43:55 +00:00
parent b5650c0457
commit b3bb01c2d2
2 changed files with 22 additions and 11 deletions
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31
os/hal/ports/STM32/LLD/SPIv1/i2s_lld.c
View File

@ -195,6 +195,7 @@ void i2s_lld_init(void) {
I2SD2.dmarx = STM32_DMA_STREAM(STM32_I2S_SPI2_RX_DMA_STREAM);
I2SD2.rxdmamode = STM32_DMA_CR_CHSEL(I2S2_RX_DMA_CHANNEL) |
STM32_DMA_CR_PL(STM32_I2S_SPI2_DMA_PRIORITY) |
STM32_DMA_CR_MSIZE_HWORD |
STM32_DMA_CR_DIR_P2M |
STM32_DMA_CR_MINC |
STM32_DMA_CR_CIRC |
@ -210,6 +211,7 @@ void i2s_lld_init(void) {
I2SD2.dmatx = STM32_DMA_STREAM(STM32_I2S_SPI2_TX_DMA_STREAM);
I2SD2.txdmamode = STM32_DMA_CR_CHSEL(I2S2_TX_DMA_CHANNEL) |
STM32_DMA_CR_PL(STM32_I2S_SPI2_DMA_PRIORITY) |
STM32_DMA_CR_MSIZE_HWORD |
STM32_DMA_CR_DIR_M2P |
STM32_DMA_CR_MINC |
STM32_DMA_CR_CIRC |
@ -231,6 +233,7 @@ void i2s_lld_init(void) {
I2SD3.dmarx = STM32_DMA_STREAM(STM32_I2S_SPI3_RX_DMA_STREAM);
I2SD3.rxdmamode = STM32_DMA_CR_CHSEL(I2S3_RX_DMA_CHANNEL) |
STM32_DMA_CR_PL(STM32_I2S_SPI3_DMA_PRIORITY) |
STM32_DMA_CR_MSIZE_HWORD |
STM32_DMA_CR_DIR_P2M |
STM32_DMA_CR_MINC |
STM32_DMA_CR_CIRC |
@ -246,6 +249,7 @@ void i2s_lld_init(void) {
I2SD3.dmatx = STM32_DMA_STREAM(STM32_I2S_SPI3_TX_DMA_STREAM);
I2SD3.txdmamode = STM32_DMA_CR_CHSEL(I2S3_TX_DMA_CHANNEL) |
STM32_DMA_CR_PL(STM32_I2S_SPI3_DMA_PRIORITY) |
STM32_DMA_CR_MSIZE_HWORD |
STM32_DMA_CR_DIR_M2P |
STM32_DMA_CR_MINC |
STM32_DMA_CR_CIRC |
@ -271,7 +275,6 @@ void i2s_lld_start(I2SDriver *i2sp) {
/* If in stopped state then enables the SPI and DMA clocks.*/
if (i2sp->state == I2S_STOP) {
uint32_t dmasize;
#if STM32_I2S_USE_SPI2
if (&I2SD2 == i2sp) {
@ -336,14 +339,14 @@ void i2s_lld_start(I2SDriver *i2sp) {
}
#endif
/* DMA configuration.*/
if ((i2sp->config->i2scfgr & (SPI_I2SCFGR_DATLEN |
SPI_I2SCFGR_CHLEN)) == 0)
dmasize = STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
else
dmasize = STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_WORD;
dmaStreamSetMode(i2sp->dmarx, i2sp->rxdmamode | dmasize);
dmaStreamSetMode(i2sp->dmatx, i2sp->txdmamode | dmasize);
if (NULL != i2sp->dmarx) {
dmaStreamSetMode(i2sp->dmarx, i2sp->rxdmamode);
dmaStreamSetPeripheral(i2sp->dmarx, &i2sp->spi->DR);
}
if (NULL != i2sp->dmatx) {
dmaStreamSetMode(i2sp->dmatx, i2sp->txdmamode);
dmaStreamSetPeripheral(i2sp->dmatx, &i2sp->spi->DR);
}
}
/* I2S (re)configuration.*/
@ -389,18 +392,24 @@ void i2s_lld_stop(I2SDriver *i2sp) {
* @notapi
*/
void i2s_lld_start_exchange(I2SDriver *i2sp) {
size_t size = i2sp->config->size;
/* In 32 bit modes the DMA has to perform double operations because fetches
are always performed using 16 bit accesses.*/
if ((i2sp->config->i2scfgr & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN)) != 0)
size *= 2;
/* RX DMA setup.*/
if (NULL != i2sp->dmarx) {
dmaStreamSetMemory0(i2sp->dmarx, i2sp->config->rx_buffer);
dmaStreamSetTransactionSize(i2sp->dmarx, i2sp->config->size);
dmaStreamSetTransactionSize(i2sp->dmarx, size);
dmaStreamEnable(i2sp->dmarx);
}
/* TX DMA setup.*/
if (NULL != i2sp->dmatx) {
dmaStreamSetMemory0(i2sp->dmatx, i2sp->config->tx_buffer);
dmaStreamSetTransactionSize(i2sp->dmatx, i2sp->config->size);
dmaStreamSetTransactionSize(i2sp->dmatx, size);
dmaStreamEnable(i2sp->dmatx);
}

2
testhal/STM32F4xx/I2S/main.c
View File

@ -58,6 +58,8 @@ int main(void) {
* Starting and configuring the I2S driver 2.
*/
i2sStart(&I2SD2, &i2scfg);
palSetPadMode(GPIOB, 10, PAL_MODE_ALTERNATE(5));
palSetPadMode(GPIOC, 3, PAL_MODE_ALTERNATE(5));
/*
* Starting continuous I2S transfer.