Add gpio_reader_a from https://github.com/aureli1c/flipperzero_GPIO_read

git-subtree-dir: gpio_reader_a
git-subtree-mainline: 264acbddceded74e899840e2402bd906ec7efc0f
git-subtree-split: c350d505d8c7a6a59d56de41cdc6a0cfdd878461

gpio_reader_a/.gitsubtree

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+https://github.com/aureli1c/flipperzero_GPIO_read main

gpio_reader_a/GPIO_reader.c

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+#include <furi.h>
+#include <gui/gui.h>
+#include <input/input.h>
+#include <stdlib.h>
+#include "GPIO_reader_item.h"
+
+typedef enum {
+    EventTypeTick,
+    EventTypeKey,
+} EventType;
+
+typedef struct {
+    EventType type;
+    InputEvent input;
+} PluginEvent;
+
+typedef struct {
+    int pin;
+    int pullMode;
+} PluginState;
+
+
+static void render_callback(Canvas* const canvas, void* ctx) {
+    const PluginState* plugin_state = acquire_mutex((ValueMutex*)ctx, 25);
+    
+    canvas_set_font(canvas, FontPrimary);
+    canvas_draw_str_aligned(canvas, canvas_width(canvas) / 2, canvas_height(canvas) / 10, AlignCenter, AlignCenter, "GPIO reader");
+
+    canvas_set_font(canvas, FontSecondary);
+    canvas_draw_str_aligned(canvas, canvas_width(canvas) / 2, canvas_height(canvas) / 10 * 3, AlignCenter, AlignCenter,
+                                gpio_item_get_pin_name(plugin_state->pin));
+
+    canvas_draw_str_aligned(canvas, canvas_width(canvas) / 2, canvas_height(canvas) / 10 * 5, AlignCenter, AlignCenter,
+                                gpio_item_get_pull_mode(plugin_state->pullMode));
+
+    canvas_set_font(canvas, FontPrimary);
+    canvas_draw_str_aligned(canvas, canvas_width(canvas) / 2, canvas_height(canvas) / 10 * 8, AlignCenter, AlignCenter,
+                                gpio_item_get_pin_level(plugin_state->pin));
+
+    release_mutex((ValueMutex*)ctx, plugin_state);
+}
+
+static void input_callback(InputEvent* input_event, FuriMessageQueue* event_queue) {
+    furi_assert(event_queue); 
+
+    PluginEvent event = {.type = EventTypeKey, .input = *input_event};
+    furi_message_queue_put(event_queue, &event, FuriWaitForever);
+}
+
+static void GPIO_reader_state_init(PluginState* const plugin_state) {
+    plugin_state->pin = 0;
+    plugin_state->pullMode = 0;
+    gpio_item_configure_pin(plugin_state->pin, plugin_state->pullMode);
+} 
+
+int32_t GPIO_reader_app(void* p) {
+    UNUSED(p);
+    FuriMessageQueue* event_queue = furi_message_queue_alloc(8, sizeof(PluginEvent));
+    
+    PluginState* plugin_state = malloc(sizeof(PluginState));
+    GPIO_reader_state_init(plugin_state);
+    ValueMutex state_mutex; 
+    if (!init_mutex(&state_mutex, plugin_state, sizeof(PluginState))) {
+        FURI_LOG_E("GPIO_reader", "cannot create mutex\r\n");
+        free(plugin_state); 
+        return 255;
+    }
+
+    // Set system callbacks
+    ViewPort* view_port = view_port_alloc(); 
+    view_port_draw_callback_set(view_port, render_callback, &state_mutex);
+    view_port_input_callback_set(view_port, input_callback, event_queue);
+ 
+    // Open GUI and register view_port
+    Gui* gui = furi_record_open("gui"); 
+    gui_add_view_port(gui, view_port, GuiLayerFullscreen); 
+
+   
+    PluginEvent event; 
+    for(bool processing = true; processing;) { 
+        FuriStatus event_status = furi_message_queue_get(event_queue, &event, 100);
+        PluginState* plugin_state = (PluginState*)acquire_mutex_block(&state_mutex);
+
+        if(event_status == FuriStatusOk) {
+            // press events
+            if(event.type == EventTypeKey) {
+                if(event.input.type == InputTypePress || event.input.type == InputTypeRepeat) {
+                    switch(event.input.key) {
+                    case InputKeyRight: 
+                            plugin_state->pin = (plugin_state->pin + 1) % GPIO_ITEM_COUNT;
+                            gpio_item_configure_pin(plugin_state->pin, plugin_state->pullMode);
+                        break; 
+                    case InputKeyLeft:  
+                            plugin_state->pin = (plugin_state->pin - 1 + GPIO_ITEM_COUNT) % GPIO_ITEM_COUNT;
+                            gpio_item_configure_pin(plugin_state->pin, plugin_state->pullMode);
+                        break; 
+                    case InputKeyUp:
+                            plugin_state->pullMode = (plugin_state->pullMode + 1) % GPIO_PULL_COUNT;
+                            gpio_item_configure_pin(plugin_state->pin, plugin_state->pullMode);
+                        break;
+                    case InputKeyDown:
+                            plugin_state->pullMode = (plugin_state->pullMode - 1 + GPIO_PULL_COUNT) % GPIO_PULL_COUNT;
+                            gpio_item_configure_pin(plugin_state->pin, plugin_state->pullMode);
+                        break;
+                    case InputKeyBack: 
+                        processing = false;
+                        break;
+                    default:
+                        break;
+                    }
+                }
+            } 
+        } else {
+            FURI_LOG_D("GPIO_reader", "FuriMessageQueue: event timeout");
+            // event timeout
+        }
+
+        view_port_update(view_port);
+        release_mutex(&state_mutex, plugin_state);
+    }
+
+    view_port_enabled_set(view_port, false);
+    gui_remove_view_port(gui, view_port);
+    furi_record_close("gui");
+    view_port_free(view_port);
+    furi_message_queue_free(event_queue);
+
+    return 0;
+}

gpio_reader_a/GPIO_reader_item.c

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+#include "GPIO_reader_item.h"
+
+const char* gpio_item_get_pin_name(uint8_t index) {
+    furi_assert(index < GPIO_ITEM_COUNT);
+    return gpio_item[index].name;
+}
+
+const char* gpio_item_get_pull_mode(uint8_t pull_mode) {
+    furi_assert(pull_mode < GPIO_PULL_COUNT);
+    return gpio_pull_mode[pull_mode].name;
+}
+
+const char* gpio_item_get_pin_level(uint8_t index) {
+    furi_assert(index < GPIO_ITEM_COUNT);
+    //furi_hal_gpio_write(gpio_item[index].pin, level);
+    if (furi_hal_gpio_read(gpio_item[index].pin)){
+        return "High";
+    }else{
+        return "Low";
+    }
+}
+
+void gpio_item_configure_pin(uint8_t index, uint8_t pull_mode) {
+    furi_assert(index < GPIO_ITEM_COUNT);
+    furi_hal_gpio_init(gpio_item[index].pin, GpioModeInput, gpio_pull_mode[pull_mode].pull, GpioSpeedVeryHigh);
+}

gpio_reader_a/GPIO_reader_item.h

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+#ifndef GPIO_READER_ITEM
+#define GPIO_READER_ITEM
+
+#include <furi.h>
+#include <furi_hal_resources.h>
+
+#define GPIO_ITEM_COUNT 8
+#define GPIO_PULL_COUNT 3
+
+typedef struct {
+    const char* name;
+    const GpioPin* pin;
+} GpioItem;
+
+static const GpioItem gpio_item[GPIO_ITEM_COUNT] = {
+    {"2: PA7", &gpio_ext_pa7},
+    {"3: PA6", &gpio_ext_pa6},
+    {"4: PA4", &gpio_ext_pa4},
+    {"5: PB3", &gpio_ext_pb3},
+    {"6: PB2", &gpio_ext_pb2},
+    {"7: PC3", &gpio_ext_pc3},
+    {"15: PC1", &gpio_ext_pc1},
+    {"16: PC0", &gpio_ext_pc0},
+};
+
+typedef struct {
+    const char* name;
+    const GpioPull pull;
+} GpioPullMode;
+
+static const GpioPullMode gpio_pull_mode[3] = {
+    {"high impedence", GpioPullNo},
+    {"pull up", GpioPullUp},
+    {"pull down", GpioPullDown},
+};
+
+const char* gpio_item_get_pin_name(uint8_t index);
+const char* gpio_item_get_pin_level(uint8_t index);
+void gpio_item_configure_pin(uint8_t index, uint8_t pullMode);
+const char* gpio_item_get_pull_mode(uint8_t pull_mode);
+
+#endif

gpio_reader_a/README.md

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+# flipperzero_GPIO_read
+
+Plugin to read the GPIOs on the Flipper Zero.

gpio_reader_a/application.fam

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+App(
+    appid="GPIO_reader",
+    name="GPIO reader",
+    apptype=FlipperAppType.EXTERNAL,
+    entry_point="GPIO_reader_app",
+    requires=["gui"],
+    stack_size=1 * 1024,
+    fap_category="Tools",
+    fap_icon="icon.png",
+    order=1,
+)