michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: dma of the stm32 refactored macro for the dma-cells

Browse source 
The macro to set the element of the dma-cells for each peripheral
are defined in the dma_stm32 header file
and used in the periph driver (as dma client)

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2021-06-18 15:52:30 +02:00 • committed by Christopher Friedt
commit 30fd0228ae
3 changed files with 61 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

42
include/drivers/dma/dma_stm32.h
View file

@ -12,4 +12,46 @@
*/
#define STM32_DMA_HAL_OVERRIDE 0x7F
/* macro for dma slot (only for dma-v1 or dma-v2 types) */
#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_dma_v2bis)
#define STM32_DMA_SLOT(id, dir, slot) 0
#else
#define STM32_DMA_SLOT(id, dir, slot) DT_INST_DMAS_CELL_BY_NAME(id, dir, slot)
#endif
#define STM32_DMA_CHANNEL_CONFIG(id, dir) \
DT_INST_DMAS_CELL_BY_NAME(id, dir, channel_config)
#define STM32_DMA_FEATURES(id, dir) \
DT_INST_DMAS_CELL_BY_NAME(id, dir, features)
#define STM32_DMA_CTLR(id, dir) \
DT_INST_DMAS_CTLR_BY_NAME(id, dir)
/* macros for channel-config */
/* direction defined on bits 6-7 */
/* 0 -> MEM_TO_MEM, 1 -> MEM_TO_PERIPH, 2 -> PERIPH_TO_MEM */
#define STM32_DMA_CONFIG_DIRECTION(config) ((config >> 6) & 0x3)
/* periph increment defined on bit 9 as true/false */
#define STM32_DMA_CONFIG_PERIPHERAL_ADDR_INC(config) ((config >> 9) & 0x1)
/* mem increment defined on bit 10 as true/false */
#define STM32_DMA_CONFIG_MEMORY_ADDR_INC(config) ((config >> 10) & 0x1)
/* perih data size defined on bits 11-12 */
/* 0 -> 1 byte, 1 -> 2 bytes, 2 -> 4 bytes */
#define STM32_DMA_CONFIG_PERIPHERAL_DATA_SIZE(config) \
(1 << ((config >> 11) & 0x3))
/* memory data size defined on bits 13, 14 */
/* 0 -> 1 byte, 1 -> 2 bytes, 2 -> 4 bytes */
#define STM32_DMA_CONFIG_MEMORY_DATA_SIZE(config) \
(1 << ((config >> 13) & 0x3))
/* priority increment offset defined on bit 15 */
#define STM32_DMA_CONFIG_PERIPHERAL_INC_FIXED(config) ((config >> 15) & 0x1)
/* priority defined on bits 16-17 as 0, 1, 2, 3 */
#define STM32_DMA_CONFIG_PRIORITY(config) ((config >> 16) & 0x3)
/* macro for features (only for dma-v1) */
#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32_dma_v1)
#define STM32_DMA_FEATURES_FIFO_THRESHOLD(features) (features & 0x3)
#else
#define STM32_DMA_FEATURES_FIFO_THRESHOLD(features) 0
#endif
#endif /* ZEPHYR_INCLUDE_DRIVERS_DMA_STM32_H_ */