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stmhal/dma.c: Modify dma_init() to accept init struct as an argument

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This removes hard-coded DMA init params from dma_init(), instead defining
these parameters in a DMA_InitTypeDef struct that gets passed as an
argument to dma_init()
This makes dma_init more generic so it can be used for I2S and SD Card,
which require different initialization parameters.
This commit is contained in:
blmorris 2015-06-22 09:24:59 -04:00 committed by Damien George
parent 3299f687f5
commit c5175526dd
4 changed files with 33 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
stmhal/dma.c
View File

@ -52,6 +52,23 @@ static const uint8_t dma_irqn[NSTREAM] = {
DMA2_Stream7_IRQn,
};
// Default parameters to dma_init() shared by spi and i2c; Channel and Direction
// vary depending on the peripheral instance so they get passed separately
const DMA_InitTypeDef dma_init_struct_spi_i2c = {
.Channel = 0,
.Direction = 0,
.PeriphInc = DMA_PINC_DISABLE,
.MemInc = DMA_MINC_ENABLE,
.PeriphDataAlignment = DMA_PDATAALIGN_BYTE,
.MemDataAlignment = DMA_MDATAALIGN_BYTE,
.Mode = DMA_NORMAL,
.Priority = DMA_PRIORITY_LOW,
.FIFOMode = DMA_FIFOMODE_DISABLE,
.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL,
.MemBurst = DMA_MBURST_INC4,
.PeriphBurst = DMA_PBURST_INC4
};
static DMA_HandleTypeDef *dma_handle[NSTREAM] = {NULL};
static uint32_t dma_last_channel[NSTREAM];
@ -80,7 +97,7 @@ static int get_dma_id(DMA_Stream_TypeDef *dma_stream) {
}
}
void dma_init(DMA_HandleTypeDef *dma, DMA_Stream_TypeDef *dma_stream, uint32_t dma_channel, uint32_t direction, void *data) {
void dma_init(DMA_HandleTypeDef *dma, DMA_Stream_TypeDef *dma_stream, const DMA_InitTypeDef *dma_init, uint32_t dma_channel, uint32_t direction, void *data) {
int dma_id = get_dma_id(dma_stream);
//printf("dma_init(%p, %p(%d), 0x%x, 0x%x, %p)\n", dma, dma_stream, dma_id, (uint)dma_channel, (uint)direction, data);
@ -90,9 +107,11 @@ void dma_init(DMA_HandleTypeDef *dma, DMA_Stream_TypeDef *dma_stream, uint32_t d
// set global pointer for IRQ handler
dma_handle[dma_id] = dma;
// initialise critical parameters
// initialise parameters
dma->Instance = dma_stream;
dma->Init = *dma_init;
dma->Init.Direction = direction;
dma->Init.Channel = dma_channel;
// half of __HAL_LINKDMA(data, xxx, *dma)
// caller must implement other half by doing: data->xxx = dma
@ -105,19 +124,6 @@ void dma_init(DMA_HandleTypeDef *dma, DMA_Stream_TypeDef *dma_stream, uint32_t d
}
dma_last_channel[dma_id] = dma_channel;
// set DMA parameters (these are only used by HAL_DMA_Init)
dma->Init.Channel = dma_channel;
dma->Init.PeriphInc = DMA_PINC_DISABLE;
dma->Init.MemInc = DMA_MINC_ENABLE;
dma->Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
dma->Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
dma->Init.Mode = DMA_NORMAL;
dma->Init.Priority = DMA_PRIORITY_LOW;
dma->Init.FIFOMode = DMA_FIFOMODE_DISABLE;
dma->Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
dma->Init.MemBurst = DMA_MBURST_INC4;
dma->Init.PeriphBurst = DMA_PBURST_INC4;
// enable clock for needed DMA peripheral
if (dma_id <= 7) {
__DMA1_CLK_ENABLE();

4
stmhal/dma.h
View File

@ -24,6 +24,8 @@
* THE SOFTWARE.
*/
void dma_init(DMA_HandleTypeDef *dma, DMA_Stream_TypeDef *dma_stream, uint32_t dma_channel, uint32_t direction, void *data);
extern const DMA_InitTypeDef dma_init_struct_spi_i2c;
void dma_init(DMA_HandleTypeDef *dma, DMA_Stream_TypeDef *dma_stream, const DMA_InitTypeDef *dma_init, uint32_t dma_channel, uint32_t direction, void *data);
void dma_deinit(DMA_HandleTypeDef *dma);
void dma_invalidate_channel(DMA_Stream_TypeDef *dma_stream, uint32_t dma_channel);

8
stmhal/i2c.c
View File

@ -471,7 +471,7 @@ STATIC mp_obj_t pyb_i2c_send(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_
// if IRQs are enabled then we can use DMA
DMA_HandleTypeDef tx_dma;
if (query_irq() == IRQ_STATE_ENABLED) {
dma_init(&tx_dma, self->tx_dma_stream, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->i2c);
dma_init(&tx_dma, self->tx_dma_stream, &dma_init_struct_spi_i2c, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->i2c);
self->i2c->hdmatx = &tx_dma;
self->i2c->hdmarx = NULL;
}
@ -545,7 +545,7 @@ STATIC mp_obj_t pyb_i2c_recv(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_
// if IRQs are enabled then we can use DMA
DMA_HandleTypeDef rx_dma;
if (query_irq() == IRQ_STATE_ENABLED) {
dma_init(&rx_dma, self->rx_dma_stream, self->rx_dma_channel, DMA_PERIPH_TO_MEMORY, self->i2c);
dma_init(&rx_dma, self->rx_dma_stream, &dma_init_struct_spi_i2c, self->rx_dma_channel, DMA_PERIPH_TO_MEMORY, self->i2c);
self->i2c->hdmatx = NULL;
self->i2c->hdmarx = &rx_dma;
}
@ -639,7 +639,7 @@ STATIC mp_obj_t pyb_i2c_mem_read(mp_uint_t n_args, const mp_obj_t *pos_args, mp_
status = HAL_I2C_Mem_Read(self->i2c, i2c_addr, mem_addr, mem_addr_size, (uint8_t*)vstr.buf, vstr.len, args[3].u_int);
} else {
DMA_HandleTypeDef rx_dma;
dma_init(&rx_dma, self->rx_dma_stream, self->rx_dma_channel, DMA_PERIPH_TO_MEMORY, self->i2c);
dma_init(&rx_dma, self->rx_dma_stream, &dma_init_struct_spi_i2c, self->rx_dma_channel, DMA_PERIPH_TO_MEMORY, self->i2c);
self->i2c->hdmatx = NULL;
self->i2c->hdmarx = &rx_dma;
status = HAL_I2C_Mem_Read_DMA(self->i2c, i2c_addr, mem_addr, mem_addr_size, (uint8_t*)vstr.buf, vstr.len);
@ -703,7 +703,7 @@ STATIC mp_obj_t pyb_i2c_mem_write(mp_uint_t n_args, const mp_obj_t *pos_args, mp
status = HAL_I2C_Mem_Write(self->i2c, i2c_addr, mem_addr, mem_addr_size, bufinfo.buf, bufinfo.len, args[3].u_int);
} else {
DMA_HandleTypeDef tx_dma;
dma_init(&tx_dma, self->tx_dma_stream, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->i2c);
dma_init(&tx_dma, self->tx_dma_stream, &dma_init_struct_spi_i2c, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->i2c);
self->i2c->hdmatx = &tx_dma;
self->i2c->hdmarx = NULL;
status = HAL_I2C_Mem_Write_DMA(self->i2c, i2c_addr, mem_addr, mem_addr_size, bufinfo.buf, bufinfo.len);

10
stmhal/spi.c
View File

@ -458,7 +458,7 @@ STATIC mp_obj_t pyb_spi_send(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_
status = HAL_SPI_Transmit(self->spi, bufinfo.buf, bufinfo.len, args[1].u_int);
} else {
DMA_HandleTypeDef tx_dma;
dma_init(&tx_dma, self->tx_dma_stream, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->spi);
dma_init(&tx_dma, self->tx_dma_stream, &dma_init_struct_spi_i2c, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->spi);
self->spi->hdmatx = &tx_dma;
self->spi->hdmarx = NULL;
status = HAL_SPI_Transmit_DMA(self->spi, bufinfo.buf, bufinfo.len);
@ -511,12 +511,12 @@ STATIC mp_obj_t pyb_spi_recv(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_
DMA_HandleTypeDef tx_dma, rx_dma;
if (self->spi->Init.Mode == SPI_MODE_MASTER) {
// in master mode the HAL actually does a TransmitReceive call
dma_init(&tx_dma, self->tx_dma_stream, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->spi);
dma_init(&tx_dma, self->tx_dma_stream, &dma_init_struct_spi_i2c, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->spi);
self->spi->hdmatx = &tx_dma;
} else {
self->spi->hdmatx = NULL;
}
dma_init(&rx_dma, self->rx_dma_stream, self->rx_dma_channel, DMA_PERIPH_TO_MEMORY, self->spi);
dma_init(&rx_dma, self->rx_dma_stream, &dma_init_struct_spi_i2c, self->rx_dma_channel, DMA_PERIPH_TO_MEMORY, self->spi);
self->spi->hdmarx = &rx_dma;
status = HAL_SPI_Receive_DMA(self->spi, (uint8_t*)vstr.buf, vstr.len);
@ -604,9 +604,9 @@ STATIC mp_obj_t pyb_spi_send_recv(mp_uint_t n_args, const mp_obj_t *pos_args, mp
status = HAL_SPI_TransmitReceive(self->spi, bufinfo_send.buf, bufinfo_recv.buf, bufinfo_send.len, args[2].u_int);
} else {
DMA_HandleTypeDef tx_dma, rx_dma;
dma_init(&tx_dma, self->tx_dma_stream, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->spi);
dma_init(&tx_dma, self->tx_dma_stream, &dma_init_struct_spi_i2c, self->tx_dma_channel, DMA_MEMORY_TO_PERIPH, self->spi);
self->spi->hdmatx = &tx_dma;
dma_init(&rx_dma, self->rx_dma_stream, self->rx_dma_channel, DMA_PERIPH_TO_MEMORY, self->spi);
dma_init(&rx_dma, self->rx_dma_stream, &dma_init_struct_spi_i2c, self->rx_dma_channel, DMA_PERIPH_TO_MEMORY, self->spi);
self->spi->hdmarx = &rx_dma;
status = HAL_SPI_TransmitReceive_DMA(self->spi, bufinfo_send.buf, bufinfo_recv.buf, bufinfo_send.len);
if (status == HAL_OK) {