stm32/boards/NUCLEO_H7x3: Fix st-flash and add openocd configuration.

To connect STM32H7 that is in SLEEPD1 state (e.g. during REPL)
debuggers like st-flash or openocd must assert SRST.

Signed-off-by: Oliver Joos <oliver.joos@hispeed.ch>

Author: oliver-joos

ports/stm32/boards/NUCLEO_H723ZG/mpconfigboard.mk

@@ -24,3 +24,7 @@ MICROPY_VFS_LFS2 = 1
 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

@@ -24,3 +24,7 @@ MICROPY_VFS_LFS2 = 1
 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/openocd_stm32h7_dual_bank.cfg

@@ -0,0 +1,46 @@
+# This script configures OpenOCD for use with an ST-Link V3 programmer/debugger
+# and an STM32H7 target microcontroller with 2MB RAM (dual bank).
+#
+# To flash your firmware:
+#
+#    $ openocd -f boards/openocd_stm32h7_dual_bank.cfg \
+#        -c "stm_flash build-BOARD/firmware.bin 0x08000000
+#
+# For a gdb server on port 3333:
+#
+#    $ openocd -f boards/openocd_stm32h7_dual_bank.cfg
+
+
+source [find interface/stlink-dap.cfg]
+transport select dapdirect_swd
+source [find target/stm32h7x_dual_bank.cfg]
+reset_config srst_only connect_assert_srst
+init
+
+proc stm_flash { BIN0 ADDR0 {BIN1 ""} {ADDR1 ""} } {
+    reset halt
+    sleep 100
+    wait_halt 2
+    flash write_image erase $BIN0 $ADDR0
+    sleep 100
+    verify_image $BIN0 $ADDR0
+    sleep 100
+    if {$BIN1 ne ""} {
+        flash write_image erase $BIN1 $ADDR1
+        sleep 100
+        verify_image $BIN1 $ADDR1
+        sleep 100
+    }
+    reset run
+    shutdown
+}
+
+proc stm_erase {} {
+    reset halt
+    sleep 100
+    stm32h7x mass_erase 0
+    sleep 100
+    stm32h7x mass_erase 1
+    sleep 100
+    shutdown
+}