jepler/circuitpython
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

stm32/uart: Enable UART FIFO for H7 MCUs.

Browse source 
The H7 has a hardware UART FIFO, so it's worth enabling it, to reduce the
chance of missed incoming characters.  Note that `HAL_UART_Init(&huart)`
does not activate the FIFO, it must be done explicitly by calling
`HAL_UARTEx_EnableFifoMode(&huart)`.

Signed-off-by: ennyKey <ennyKey@fn.de>
This commit is contained in:
ennyKey 2024-12-04 22:33:17 +01:00 committed by Damien George
parent 5c6da11799
commit 2a46759fe8
3 changed files with 17 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
ports/stm32/Makefile
View file

@ -417,6 +417,12 @@ HAL_SRC_C += $(addprefix $(STM32LIB_HAL_BASE)/Src/stm32$(MCU_SERIES)xx_,\
)
endif
ifeq ($(MCU_SERIES),$(filter $(MCU_SERIES),h7))
HAL_SRC_C += $(addprefix $(STM32LIB_HAL_BASE)/Src/stm32$(MCU_SERIES)xx_,\
hal_uart_ex.c \
)
endif
USBDEV_SRC_C += $(addprefix $(USBDEV_DIR)/,\
core/src/usbd_core.c \
core/src/usbd_ctlreq.c \

1
ports/stm32/boards/stm32h7xx_hal_conf_base.h
View file

@ -90,6 +90,7 @@
#include "stm32h7xx_hal_spi.h"
#include "stm32h7xx_hal_tim.h"
#include "stm32h7xx_hal_uart.h"
#include "stm32h7xx_hal_uart_ex.h"
#include "stm32h7xx_hal_usart.h"
#include "stm32h7xx_hal_wwdg.h"
#include "stm32h7xx_ll_adc.h"

11
ports/stm32/uart.c
View file

@ -653,7 +653,7 @@ bool uart_init(machine_uart_obj_t *uart_obj,
huart.Init.HwFlowCtl = flow;
huart.Init.OverSampling = UART_OVERSAMPLING_16;
#if defined(STM32G4) // H7 and WB also have fifo..
#if defined(STM32G4) || defined(STM32H7) // WB also has a fifo..
huart.FifoMode = UART_FIFOMODE_ENABLE;
#endif
@ -701,6 +701,12 @@ bool uart_init(machine_uart_obj_t *uart_obj,
uart_obj->char_width = CHAR_WIDTH_8BIT;
}
#if defined(STM32H7)
HAL_UARTEx_SetTxFifoThreshold(&huart, UART_TXFIFO_THRESHOLD_1_8);
HAL_UARTEx_SetRxFifoThreshold(&huart, UART_RXFIFO_THRESHOLD_1_8);
HAL_UARTEx_EnableFifoMode(&huart);
#endif
uart_obj->mp_irq_trigger = 0;
uart_obj->mp_irq_obj = NULL;
@ -1141,6 +1147,9 @@ size_t uart_tx_data(machine_uart_obj_t *self, const void *src_in, size_t num_cha
// timeout_char by FIFO size + 1.
// STM32G4 has 8 words FIFO.
timeout = (8 + 1) * self->timeout_char;
#elif defined(STM32H7)
// STM32H7 has 16 words FIFO.
timeout = (16 + 1) * self->timeout_char;
#else
// The timeout specified here is for waiting for the TX data register to
// become empty (ie between chars), as well as for the final char to be