unleashed-firmware/applications/examples/example_adc/example_adc.c

177 lines
7.2 KiB
C

/**
* @file example_adc.c
* @brief ADC example.
*/
#include <furi.h>
#include <furi_hal.h>
#include <gui/gui.h>
#include <gui/elements.h>
#include <input/input.h>
const uint8_t font[] =
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"\315\364II;\13\0\177\6\315\364\371\6\0\0\0\4\377\377\0";
#define FONT_HEIGHT (8u)
typedef float (*ValueConverter)(FuriHalAdcHandle* handle, uint16_t value);
typedef struct {
const GpioPinRecord* pin;
float value;
ValueConverter converter;
const char* suffix;
} DataItem;
typedef struct {
size_t count;
DataItem* items;
} Data;
const GpioPinRecord item_vref = {.name = "VREF", .channel = FuriHalAdcChannelVREFINT};
const GpioPinRecord item_temp = {.name = "TEMP", .channel = FuriHalAdcChannelTEMPSENSOR};
const GpioPinRecord item_vbat = {.name = "VBAT", .channel = FuriHalAdcChannelVBAT};
static void app_draw_callback(Canvas* canvas, void* ctx) {
furi_assert(ctx);
Data* data = ctx;
canvas_set_custom_u8g2_font(canvas, font);
char buffer[64];
int32_t x = 0, y = FONT_HEIGHT;
for(size_t i = 0; i < data->count; i++) {
if(i == canvas_height(canvas) / FONT_HEIGHT) {
x = 64;
y = FONT_HEIGHT;
}
snprintf(
buffer,
sizeof(buffer),
"%4s: %4.0f%s\n",
data->items[i].pin->name,
(double)data->items[i].value,
data->items[i].suffix);
canvas_draw_str(canvas, x, y, buffer);
y += FONT_HEIGHT;
}
}
static void app_input_callback(InputEvent* input_event, void* ctx) {
furi_assert(ctx);
FuriMessageQueue* event_queue = ctx;
furi_message_queue_put(event_queue, input_event, FuriWaitForever);
}
int32_t example_adc_main(void* p) {
UNUSED(p);
// Data
Data data = {};
for(size_t i = 0; i < gpio_pins_count; i++) {
if(gpio_pins[i].channel != FuriHalAdcChannelNone) {
data.count++;
}
}
data.count += 3; // Special channels
data.items = malloc(data.count * sizeof(DataItem));
size_t item_pos = 0;
for(size_t i = 0; i < gpio_pins_count; i++) {
if(gpio_pins[i].channel != FuriHalAdcChannelNone) {
furi_hal_gpio_init(gpio_pins[i].pin, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
data.items[item_pos].pin = &gpio_pins[i];
data.items[item_pos].converter = furi_hal_adc_convert_to_voltage;
data.items[item_pos].suffix = "mV";
item_pos++;
}
}
data.items[item_pos].pin = &item_vref;
data.items[item_pos].converter = furi_hal_adc_convert_vref;
data.items[item_pos].suffix = "mV";
item_pos++;
data.items[item_pos].pin = &item_temp;
data.items[item_pos].converter = furi_hal_adc_convert_temp;
data.items[item_pos].suffix = "C";
item_pos++;
data.items[item_pos].pin = &item_vbat;
data.items[item_pos].converter = furi_hal_adc_convert_vbat;
data.items[item_pos].suffix = "mV";
item_pos++;
furi_assert(item_pos == data.count);
// Alloc message queue
FuriMessageQueue* event_queue = furi_message_queue_alloc(8, sizeof(InputEvent));
// Configure view port
ViewPort* view_port = view_port_alloc();
view_port_draw_callback_set(view_port, app_draw_callback, &data);
view_port_input_callback_set(view_port, app_input_callback, event_queue);
// Register view port in GUI
Gui* gui = furi_record_open(RECORD_GUI);
gui_add_view_port(gui, view_port, GuiLayerFullscreen);
// Initialize ADC
FuriHalAdcHandle* adc_handle = furi_hal_adc_acquire();
furi_hal_adc_configure(adc_handle);
// Process events
InputEvent event;
bool running = true;
while(running) {
if(furi_message_queue_get(event_queue, &event, 100) == FuriStatusOk) {
if(event.type == InputTypePress && event.key == InputKeyBack) {
running = false;
}
} else {
for(size_t i = 0; i < data.count; i++) {
data.items[i].value = data.items[i].converter(
adc_handle, furi_hal_adc_read(adc_handle, data.items[i].pin->channel));
}
view_port_update(view_port);
}
}
furi_hal_adc_release(adc_handle);
view_port_enabled_set(view_port, false);
gui_remove_view_port(gui, view_port);
view_port_free(view_port);
furi_message_queue_free(event_queue);
furi_record_close(RECORD_GUI);
free(data.items);
return 0;
}