stm32: Default to --connect-under-reset if flashing via deploy-stlink.

(Can be overridden by setting STFLASH variable.)

Generalises the change from 6b13e6c to all
stm32 boards. As we're resetting the target to flash it anyway, it
shouldn't hurt to put the target into reset before trying to connect.

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>

Author: projectgus

ports/stm32/Makefile

@@ -72,7 +72,7 @@ PYDFU ?= $(TOP)/tools/pydfu.py
 DFU_UTIL ?= dfu-util
 BOOTLOADER_DFU_USB_VID ?= 0x0483
 BOOTLOADER_DFU_USB_PID ?= 0xDF11
-STFLASH ?= st-flash
+STFLASH ?= st-flash --connect-under-reset
 OPENOCD ?= openocd
 OPENOCD_CONFIG ?= boards/openocd_stm32f4.cfg
 

ports/stm32/boards/NUCLEO_H723ZG/mpconfigboard.mk

@@ -26,5 +26,4 @@ MICROPY_HW_ENABLE_ISR_UART_FLASH_FUNCS_IN_RAM = 1
 FROZEN_MANIFEST ?= $(BOARD_DIR)/manifest.py
 
 # Flash tool configuration
-STFLASH = st-flash --connect-under-reset
 OPENOCD_CONFIG = boards/openocd_stm32h7_dual_bank.cfg

ports/stm32/boards/NUCLEO_H743ZI/mpconfigboard.mk

@@ -26,5 +26,4 @@ MICROPY_HW_ENABLE_ISR_UART_FLASH_FUNCS_IN_RAM = 1
 FROZEN_MANIFEST ?= $(BOARD_DIR)/manifest.py
 
 # Flash tool configuration
-STFLASH = st-flash --connect-under-reset
 OPENOCD_CONFIG = boards/openocd_stm32h7_dual_bank.cfg

ports/stm32/mboot/Makefile

@@ -54,7 +54,7 @@ DFU=$(TOP)/tools/dfu.py
 PYDFU ?= $(TOP)/tools/pydfu.py
 BOOTLOADER_DFU_USB_VID ?= 0x0483
 BOOTLOADER_DFU_USB_PID ?= 0xDF11
-STFLASH ?= st-flash
+STFLASH ?= st-flash --connect-under-reset
 OPENOCD ?= openocd
 OPENOCD_CONFIG ?= boards/openocd_stm32f4.cfg