TEMPORARY - DROP: Improved stm32 GPIO driver

TEMPORARY: SUBMITTED IN atomvm#836.

Complete rewrite of the stm32 gpio driver using updated APIs.

Moves all GPIO related atoms from `platform_defaultatoms.{c,h}` into `gpio_driver.c`
Improved input validation.
Adds read support port driver.
Adds nif functions to support read and write.
Adds cmake configuration options to disable nifs and/or port driver when building the VM.

Signed-off-by: Winford <winford@object.stream>

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.6.0-alpha.2] - Unreleased
 
+### Added
+
+- New gpio driver for STM32 with nif and port support for read and write functions.
+
 ## [0.6.0-alpha.1] - 2023-10-09
 
 ### Added

src/platforms/stm32/CMakeLists.txt

@@ -32,6 +32,8 @@ option(AVM_NEWLIB_NANO "Use 'nano' newlib. Saves 46kB, no `long long` support" O
 option(AVM_LOG_DISABLE "Disable log output" OFF)
 option(AVM_ENABLE_LOG_COLOR "Use color log output" OFF)
 option(AVM_ENABLE_LOG_LINES "Include source and line info for all enbled levels" OFF)
+option(AVM_DISABLE_GPIO_NIFS "Disable GPIO nifs (input and output)" OFF)
+option(AVM_DISABLE_GPIO_PORT_DRIVER "Disable GPIO 'port' driver (input, output, and interrupts)" OFF)
 
 set(AVM_DISABLE_SMP ON FORCE)
 
@@ -59,6 +61,14 @@ if (AVM_ENABLE_LOG_LINES)
     add_compile_definitions(ENABLE_LOG_LINE_INFO)
 endif()
 
+# Configure Drivers
+if (AVM_DISABLE_GPIO_NIFS)
+    add_compile_definitions(AVM_DISABLE_GPIO_NIFS)
+endif()
+if (AVM_DISABLE_GPIO_PORT_DRIVER)
+    add_compile_definitions(AVM_DISABLE_GPIO_PORT_DRIVER)
+endif()
+
 # Include an error in case the user forgets to specify ARM as a toolchain
 if (NOT CMAKE_TOOLCHAIN_FILE)
     message(FATAL_ERROR "Cross compiling only. Please use -DCMAKE_TOOLCHAIN_FILE=cmake/arm-toolchain.cmake or use\

src/platforms/stm32/src/lib/CMakeLists.txt

@@ -23,15 +23,15 @@ project (libAtomVMPlatformSTM32)
 
 set(HEADER_FILES
     avm_log.h
-    gpiodriver.h
+    gpio_driver.h
     platform_defaultatoms.h
     stm_sys.h
     ../../../../libAtomVM/platform_nifs.h
     ../../../../libAtomVM/sys.h
 )
 
 set(SOURCE_FILES
-    gpiodriver.c
+    gpio_driver.c
     platform_defaultatoms.c
     platform_nifs.c
     sys.c