michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: dma: i2s: stm32: I2S Master DMA support

Browse source 
When configuring the I2S peripheral as a master, the DMA channel
direction must be configured to transfer data from memory to the
peripheral.

Currently the configuration of channel direction is always set for
peripheral to memory regardless of whether it is the TX or the RX
channel.

Signed-off-by: Abe Kohandel <abe@electronshepherds.com>
This commit is contained in:
Abe Kohandel 2020-04-07 23:27:57 -07:00 • committed by Carles Cufí
commit 861548f12f
2 changed files with 9 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/i2s/i2s_ll_stm32.c
View file

@ -839,7 +839,7 @@ static struct device *get_dev_from_tx_dma_channel(u32_t dma_channel)
return active_dma_tx_channel[dma_channel];
}
/* src_dev and dest_dev should be 'MEM' or 'PERIPH'. */
/* src_dev and dest_dev should be 'MEMORY' or 'PERIPHERAL'. */
#define I2S_DMA_CHANNEL_INIT(index, dir, dir_cap, src_dev, dest_dev) \
.dir = { \
.dma_name = DT_I2S_##index##_DMA_CONTROLLER_##dir_cap, \
@ -847,7 +847,7 @@ static struct device *get_dev_from_tx_dma_channel(u32_t dma_channel)
.dma_cfg = { \
.block_count = 2, \
.dma_slot = DT_I2S_##index##_DMA_SLOT_##dir_cap, \
.channel_direction = PERIPHERAL_TO_MEMORY, \
.channel_direction = src_dev##_TO_##dest_dev, \
.source_data_size = 2, /* 16bit default */ \
.dest_data_size = 2, /* 16bit default */ \
.source_burst_length = 0, /* SINGLE transfer */ \
@ -888,8 +888,8 @@ struct queue_item rx_##index##_ring_buf[CONFIG_I2S_STM32_RX_BLOCK_COUNT + 1];\
struct queue_item tx_##index##_ring_buf[CONFIG_I2S_STM32_TX_BLOCK_COUNT + 1];\
\
static struct i2s_stm32_data i2s_stm32_data_##index = { \
I2S_DMA_CHANNEL_INIT(index, rx, RX, PERIPH, MEM), \
I2S_DMA_CHANNEL_INIT(index, tx, TX, MEM, PERIPH), \
I2S_DMA_CHANNEL_INIT(index, rx, RX, PERIPHERAL, MEMORY), \
I2S_DMA_CHANNEL_INIT(index, tx, TX, MEMORY, PERIPHERAL), \
}; \
DEVICE_AND_API_INIT(i2s_stm32_##index, DT_I2S_##index##_NAME, \
&i2s_stm32_initialize, &i2s_stm32_data_##index, \