Add busio support, cleanup

Author: hierophect

.github/workflows/build.yml

@@ -189,6 +189,7 @@ jobs:
         - "mini_sam_m4"
         - "monster_m4sk"
         - "ndgarage_ndbit6"
+        - "nucleo_f767zi"
         - "nucleo_h743zi_2"
         - "ohs2020_badge"
         - "openbook_m4"

ports/stm/Makefile

@@ -25,11 +25,11 @@
 
 # Select the board to build for.
 ifeq ($(BOARD),)
-	$(error You must provide a BOARD parameter)
+$(error You must provide a BOARD parameter)
 else
-	ifeq ($(wildcard boards/$(BOARD)/.),)
-		$(error Invalid BOARD specified)
-	endif
+ifeq ($(wildcard boards/$(BOARD)/.),)
+$(error Invalid BOARD specified)
+endif
 endif
 
 # If the build directory is not given, make it reflect the board name.
@@ -193,7 +193,13 @@ SRC_STM32 = $(addprefix $(HAL_DIR)/Src/stm32$(MCU_SERIES_LOWER)xx_,\
 	ll_exti.c \
 )
 
-SRC_STM32 += system_stm32$(MCU_SERIES_LOWER)xx.c
+# Need this to avoid UART linker problems. TODO: rewrite to use registered callbacks.
+# Does not exist for F4 and lower
+ifeq ($(MCU_VARIANT),$(filter $(MCU_VARIANT),STM32F765xx STM32F767xx STM32F769xx STM32H743xx))
+	SRC_STM32 += $(HAL_DIR)/Src/stm32$(MCU_SERIES_LOWER)xx_hal_uart_ex.c
+endif
+
+SRC_STM32 += boards/system_stm32$(MCU_SERIES_LOWER)xx.c
 
 SRC_C += \
 	background.c \

ports/stm/boards/STM32H743ZITx_FLASH.ld

@@ -23,7 +23,7 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_D10), MP_ROM_PTR(&pin_PD14) },
     { MP_ROM_QSTR(MP_QSTR_D11), MP_ROM_PTR(&pin_PB05) },
     { MP_ROM_QSTR(MP_QSTR_D12), MP_ROM_PTR(&pin_PA06) },
-    { MP_ROM_QSTR(MP_QSTR_D13), MP_ROM_PTR(&pin_PA07) },
+    { MP_ROM_QSTR(MP_QSTR_D13), MP_ROM_PTR(&pin_PA05) },
     { MP_ROM_QSTR(MP_QSTR_D14), MP_ROM_PTR(&pin_PB09) },
     { MP_ROM_QSTR(MP_QSTR_D15), MP_ROM_PTR(&pin_PB08) },
     { MP_ROM_QSTR(MP_QSTR_D16), MP_ROM_PTR(&pin_PC06) },