Updated GPIO to new format

Makefile

@@ -5,6 +5,9 @@ BUILD_DIR    := build
 BUILD_TYPE   ?= Debug
 TOOLCHAIN    := gcc-arm-none-eabi.cmake
 
+CFLAGS_DEBUG   ?= -g3 -O0
+CXXFLAGS_DEBUG ?= -g3 -O0
+
 # MCU target (override on command line: make build MCU_MODEL=STM32F051x8)
 MCU_MODEL    ?= STM32L432xx
 MCU_FAMILY   ?= STM32L4xx
@@ -20,6 +23,8 @@ ${BUILD_DIR}/build.ninja:
 		-DCMAKE_BUILD_TYPE=${BUILD_TYPE} \
 		-DCMAKE_TOOLCHAIN_FILE=${TOOLCHAIN} \
 		-DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
+		-DCMAKE_C_FLAGS_DEBUG="${CFLAGS_DEBUG}" \
+        -DCMAKE_CXX_FLAGS_DEBUG="${CXXFLAGS_DEBUG}" \
 		-DMCU_MODEL=$(MCU_MODEL) \
 		-DMCU_FAMILY=$(MCU_FAMILY)