Update GPIO driver usage (#23)

Recently the SDK removed GPIO functionality because pins are now exclusively claimed by a driver. That means the GPIO app can't claim pins that are already in use... except when it calls the ESP-IDF driver code directly, which is what the app now does.

Apps/GPIO/main/CMakeLists.txt

@@ -7,6 +7,6 @@ idf_component_register(
     # Library headers must be included directly,
     # because all regular dependencies get stripped by elf_loader's cmake script
     INCLUDE_DIRS ../../../Libraries/TactilityCpp/Include
-    REQUIRES TactilitySDK
+    REQUIRES TactilitySDK driver
 )
 

Apps/GPIO/main/Source/Gpio.cpp

@@ -3,18 +3,18 @@
 #include <Tactility/kernel/Kernel.h>
 
 #include <tt_hal.h>
-#include <tt_hal_gpio.h>
 #include <tt_lvgl.h>
 #include <tt_lvgl_toolbar.h>
 
 #include <esp_log.h>
+#include <driver/gpio.h>
 
 constexpr char* TAG = "GPIO";
 
 void Gpio::updatePinStates() {
     // Update pin states
     for (int i = 0; i < pinStates.size(); ++i) {
-        pinStates[i] = tt_hal_gpio_get_level(i);
+        pinStates[i] = gpio_get_level((gpio_num_t)i);
     }
 }
 
@@ -113,11 +113,10 @@ void Gpio::onShow(AppHandle app, lv_obj_t* parent) {
 
     mutex.lock();
 
-    auto pin_count = tt_hal_gpio_get_pin_count();
-    pinStates.resize(pin_count);
-    pinWidgets.resize(pin_count);
+    pinStates.resize(GPIO_PIN_COUNT);
+    pinWidgets.resize(GPIO_PIN_COUNT);
 
-    for (int i = 0; i < pin_count; ++i) {
+    for (int i = 0; i < GPIO_PIN_COUNT; ++i) {
         constexpr uint8_t offset_from_left_label = 4;
 
         // Add the GPIO number before the first item on a row

Apps/GPIO/manifest.properties

@@ -5,6 +5,6 @@ sdk=0.7.0-dev
 platforms=esp32,esp32s3,esp32c6,esp32p4
 [app]
 id=one.tactility.gpio
-versionName=0.3.0
-versionCode=3
+versionName=0.4.0
+versionCode=4
 name=GPIO