Move plugins to external folder

applications/external/flipper_i2ctools/i2csniffer.c

@@ -0,0 +1,101 @@
+#include "i2csniffer.h"
+
+void clear_sniffer_buffers(i2cSniffer* i2c_sniffer) {
+    furi_assert(i2c_sniffer);
+    for(uint8_t i = 0; i < MAX_RECORDS; i++) {
+        for(uint8_t j = 0; j < MAX_MESSAGE_SIZE; j++) {
+            i2c_sniffer->frames[i].ack[j] = false;
+            i2c_sniffer->frames[i].data[j] = 0;
+        }
+        i2c_sniffer->frames[i].bit_index = 0;
+        i2c_sniffer->frames[i].data_index = 0;
+    }
+    i2c_sniffer->frame_index = 0;
+    i2c_sniffer->state = I2C_BUS_FREE;
+    i2c_sniffer->first = true;
+}
+
+void start_interrupts(i2cSniffer* i2c_sniffer) {
+    furi_assert(i2c_sniffer);
+    furi_hal_gpio_init(pinSCL, GpioModeInterruptRise, GpioPullNo, GpioSpeedHigh);
+    furi_hal_gpio_add_int_callback(pinSCL, SCLcallback, i2c_sniffer);
+
+    // Add Rise and Fall Interrupt on SDA pin
+    furi_hal_gpio_init(pinSDA, GpioModeInterruptRiseFall, GpioPullNo, GpioSpeedHigh);
+    furi_hal_gpio_add_int_callback(pinSDA, SDAcallback, i2c_sniffer);
+}
+
+void stop_interrupts() {
+    furi_hal_gpio_remove_int_callback(pinSCL);
+    furi_hal_gpio_remove_int_callback(pinSDA);
+    // Reset GPIO pins to default state
+    furi_hal_gpio_init(pinSCL, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
+    furi_hal_gpio_init(pinSDA, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
+}
+
+// Called on Fallin/Rising SDA
+// Used to monitor i2c bus state
+void SDAcallback(void* _i2c_sniffer) {
+    i2cSniffer* i2c_sniffer = _i2c_sniffer;
+    // SCL is low maybe cclock strecching
+    if(furi_hal_gpio_read(pinSCL) == false) {
+        return;
+    }
+    // Check for stop condition: SDA rising while SCL is High
+    if(i2c_sniffer->state == I2C_BUS_STARTED) {
+        if(furi_hal_gpio_read(pinSDA) == true) {
+            i2c_sniffer->state = I2C_BUS_FREE;
+        }
+    }
+    // Check for start condition: SDA falling while SCL is high
+    else if(furi_hal_gpio_read(pinSDA) == false) {
+        i2c_sniffer->state = I2C_BUS_STARTED;
+        if(i2c_sniffer->first) {
+            i2c_sniffer->first = false;
+            return;
+        }
+        i2c_sniffer->frame_index++;
+        if(i2c_sniffer->frame_index >= MAX_RECORDS) {
+            clear_sniffer_buffers(i2c_sniffer);
+        }
+    }
+    return;
+}
+
+// Called on Rising SCL
+// Used to read bus datas
+void SCLcallback(void* _i2c_sniffer) {
+    i2cSniffer* i2c_sniffer = _i2c_sniffer;
+    if(i2c_sniffer->state == I2C_BUS_FREE) {
+        return;
+    }
+    uint8_t frame = i2c_sniffer->frame_index;
+    uint8_t bit = i2c_sniffer->frames[frame].bit_index;
+    uint8_t data_idx = i2c_sniffer->frames[frame].data_index;
+    if(bit < 8) {
+        i2c_sniffer->frames[frame].data[data_idx] <<= 1;
+        i2c_sniffer->frames[frame].data[data_idx] |= (int)furi_hal_gpio_read(pinSDA);
+        i2c_sniffer->frames[frame].bit_index++;
+    } else {
+        i2c_sniffer->frames[frame].ack[data_idx] = !furi_hal_gpio_read(pinSDA);
+        i2c_sniffer->frames[frame].data_index++;
+        i2c_sniffer->frames[frame].bit_index = 0;
+    }
+}
+
+i2cSniffer* i2c_sniffer_alloc() {
+    i2cSniffer* i2c_sniffer = malloc(sizeof(i2cSniffer));
+    i2c_sniffer->started = false;
+    i2c_sniffer->row_index = 0;
+    i2c_sniffer->menu_index = 0;
+    clear_sniffer_buffers(i2c_sniffer);
+    return i2c_sniffer;
+}
+
+void i2c_sniffer_free(i2cSniffer* i2c_sniffer) {
+    furi_assert(i2c_sniffer);
+    if(i2c_sniffer->started) {
+        stop_interrupts();
+    }
+    free(i2c_sniffer);
+}