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arch/arm/stm32h7: dma and serial: add TRBUFF flag. It is obligatory for uart.

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This commit is contained in:
Alexander Vasiljev 2021-08-12 13:04:15 +03:00 committed by Alan Carvalho de Assis
parent 6b6c11f0ad
commit 4229099944
3 changed files with 4 additions and 3 deletions
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2
arch/arm/src/stm32h7/hardware/stm32_dma.h
View File

@ -319,7 +319,7 @@
#define DMA_SCR_DBM (1 << 18) /* Bit 15: Double buffer mode */
#define DMA_SCR_CT (1 << 19) /* Bit 19: Current target */
/* Bit 20: Reserved */
#define DMA_TRBUFF (1 << 20) /* Bit 20: Enable the DMA to handle bufferable transfers*/
#define DMA_SCR_PBURST_SHIFT (21) /* Bits 21-22: Peripheral burst transfer configuration */
#define DMA_SCR_PBURST_MASK (3 << DMA_SCR_PBURST_SHIFT)
# define DMA_SCR_PBURST_SINGLE (0 << DMA_SCR_PBURST_SHIFT) /* 00: Single transfer */

2
arch/arm/src/stm32h7/stm32_dma.c
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@ -1350,7 +1350,7 @@ static void stm32_sdma_setup(DMA_HANDLE handle, FAR stm32_dmacfg_t *cfg)
scr &= (DMA_SCR_PFCTRL | DMA_SCR_DIR_MASK | DMA_SCR_PINC |
DMA_SCR_MINC | DMA_SCR_PSIZE_MASK | DMA_SCR_MSIZE_MASK |
DMA_SCR_PINCOS | DMA_SCR_DBM | DMA_SCR_CIRC |
DMA_SCR_PBURST_MASK | DMA_SCR_MBURST_MASK);
DMA_SCR_PBURST_MASK | DMA_SCR_MBURST_MASK | DMA_TRBUFF);
regval |= scr;
dmachan_putreg(dmachan, STM32_DMA_SCR_OFFSET, regval);
}

3
arch/arm/src/stm32h7/stm32_serial.c
View File

@ -467,7 +467,8 @@
DMA_SCR_MSIZE_8BITS | \
DMA_SCR_PBURST_SINGLE | \
DMA_SCR_MBURST_SINGLE | \
CONFIG_USART_TXDMAPRIO)
CONFIG_USART_TXDMAPRIO | \
DMA_TRBUFF)
#endif /* SERIAL_HAVE_TXDMA */