UART echo app (#831)

* HAL: add context to UART IRQ's
* Apps: uart echo/log application
* Sync api
* Another api sync

applications/applications.c

@@ -20,6 +20,7 @@ extern int32_t desktop_srv(void* p);
 extern int32_t accessor_app(void* p);
 extern int32_t archive_app(void* p);
 extern int32_t bad_usb_app(void* p);
+extern int32_t uart_echo_app(void* p);
 extern int32_t blink_test_app(void* p);
 extern int32_t bt_debug_app(void* p);
 extern int32_t delay_test_app(void* p);
@@ -236,6 +237,10 @@ const FlipperApplication FLIPPER_DEBUG_APPS[] = {
     {.app = bad_usb_app, .name = "Bad USB test", .stack_size = 2048, .icon = NULL},
 #endif
 
+#ifdef APP_UART_ECHO
+    {.app = uart_echo_app, .name = "Uart Echo", .stack_size = 2048, .icon = NULL},
+#endif
+
 #ifdef APP_IRDA_MONITOR
     {.app = irda_monitor_app, .name = "Irda Monitor", .stack_size = 1024, .icon = NULL},
 #endif

applications/applications.mk

@@ -48,6 +48,7 @@ APP_DISPLAY_TEST = 1
 
 APP_USB_MOUSE = 1
 APP_BAD_USB = 1
+APP_UART_ECHO = 1
 endif
 
 
@@ -132,6 +133,11 @@ CFLAGS		+= -DAPP_USB_TEST
 SRV_GUI = 1
 endif
 
+APP_UART_ECHO ?= 0
+ifeq ($(APP_UART_ECHO), 1)
+CFLAGS		+= -DAPP_UART_ECHO
+SRV_GUI = 1
+endif
 
 APP_DISPLAY_TEST ?= 0
 ifeq ($(APP_DISPLAY_TEST), 1)

applications/debug_tools/uart_echo.c

@@ -0,0 +1,268 @@
+#include <furi.h>
+#include <m-string.h>
+#include <gui/gui.h>
+#include <notification/notification.h>
+#include <notification/notification-messages.h>
+#include <gui/elements.h>
+#include <stream_buffer.h>
+#include <furi-hal-uart.h>
+#include <furi-hal-console.h>
+#include <gui/view_dispatcher.h>
+#include <gui/modules/dialog_ex.h>
+
+#define LINES_ON_SCREEN 6
+#define COLUMNS_ON_SCREEN 21
+
+typedef struct UartDumpModel UartDumpModel;
+
+typedef struct {
+    Gui* gui;
+    NotificationApp* notification;
+    ViewDispatcher* view_dispatcher;
+    View* view;
+    FuriThread* worker_thread;
+    StreamBufferHandle_t rx_stream;
+} UartEchoApp;
+
+typedef struct {
+    string_t text;
+} ListElement;
+
+struct UartDumpModel {
+    ListElement* list[LINES_ON_SCREEN];
+    uint8_t line;
+
+    char last_char;
+    bool escape;
+};
+
+typedef enum {
+    WorkerEventReserved = (1 << 0), // Reserved for StreamBuffer internal event
+    WorkerEventStop = (1 << 1),
+    WorkerEventRx = (1 << 2),
+} WorkerEventFlags;
+
+#define WORKER_EVENTS_MASK (WorkerEventStop | WorkerEventRx)
+
+const NotificationSequence sequence_notification = {
+    &message_display_on,
+    &message_green_255,
+    &message_delay_10,
+    NULL,
+};
+
+static void uart_echo_view_draw_callback(Canvas* canvas, void* _model) {
+    UartDumpModel* model = _model;
+
+    // Prepare canvas
+    canvas_clear(canvas);
+    canvas_set_color(canvas, ColorBlack);
+    canvas_set_font(canvas, FontKeyboard);
+
+    for(size_t i = 0; i < LINES_ON_SCREEN; i++) {
+        canvas_draw_str(
+            canvas,
+            0,
+            (i + 1) * (canvas_current_font_height(canvas) - 1),
+            string_get_cstr(model->list[i]->text));
+
+        if(i == model->line) {
+            uint8_t width = canvas_string_width(canvas, string_get_cstr(model->list[i]->text));
+
+            canvas_draw_box(
+                canvas,
+                width,
+                (i) * (canvas_current_font_height(canvas) - 1) + 2,
+                2,
+                canvas_current_font_height(canvas) - 2);
+        }
+    }
+}
+
+static bool uart_echo_view_input_callback(InputEvent* event, void* context) {
+    bool consumed = false;
+    return consumed;
+}
+
+static uint32_t uart_echo_exit(void* context) {
+    return VIEW_NONE;
+}
+
+static void uart_echo_on_irq_cb(UartIrqEvent ev, uint8_t data, void* context) {
+    furi_assert(context);
+    BaseType_t xHigherPriorityTaskWoken = pdFALSE;
+    UartEchoApp* app = context;
+
+    if(ev == UartIrqEventRXNE) {
+        xStreamBufferSendFromISR(app->rx_stream, &data, 1, &xHigherPriorityTaskWoken);
+        osThreadFlagsSet(furi_thread_get_thread_id(app->worker_thread), WorkerEventRx);
+        portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
+    }
+}
+
+static void uart_echo_push_to_list(UartDumpModel* model, const char data) {
+    if(model->escape) {
+        // escape code end with letter
+        if((data >= 'a' && data <= 'z') || (data >= 'A' && data <= 'Z')) {
+            model->escape = false;
+        }
+    } else if(data == '[' && model->last_char == '\e') {
+        // "Esc[" is a escape code
+        model->escape = true;
+    } else if((data >= ' ' && data <= '~') || (data == '\n' || data == '\r')) {
+        bool new_string_needed = false;
+        if(string_size(model->list[model->line]->text) >= COLUMNS_ON_SCREEN) {
+            new_string_needed = true;
+        } else if((data == '\n' || data == '\r')) {
+            // pack line breaks
+            if(model->last_char != '\n' && model->last_char != '\r') {
+                new_string_needed = true;
+            }
+        }
+
+        if(new_string_needed) {
+            if((model->line + 1) < LINES_ON_SCREEN) {
+                model->line += 1;
+            } else {
+                ListElement* first = model->list[0];
+
+                for(size_t i = 1; i < LINES_ON_SCREEN; i++) {
+                    model->list[i - 1] = model->list[i];
+                }
+
+                string_reset(first->text);
+                model->list[model->line] = first;
+            }
+        }
+
+        if(data != '\n' && data != '\r') {
+            string_push_back(model->list[model->line]->text, data);
+        }
+    }
+    model->last_char = data;
+}
+
+static int32_t uart_echo_worker(void* context) {
+    furi_assert(context);
+    UartEchoApp* app = context;
+
+    while(1) {
+        uint32_t events = osThreadFlagsWait(WORKER_EVENTS_MASK, osFlagsWaitAny, osWaitForever);
+        furi_check((events & osFlagsError) == 0);
+
+        if(events & WorkerEventStop) break;
+        if(events & WorkerEventRx) {
+            size_t length = 0;
+            do {
+                uint8_t data[64];
+                length = xStreamBufferReceive(app->rx_stream, data, 64, 0);
+                if(length > 0) {
+                    furi_hal_uart_tx(FuriHalUartIdUSART1, data, length);
+                    with_view_model(
+                        app->view, (UartDumpModel * model) {
+                            for(size_t i = 0; i < length; i++) {
+                                uart_echo_push_to_list(model, data[i]);
+                            }
+                            return false;
+                        });
+                }
+            } while(length > 0);
+
+            notification_message(app->notification, &sequence_notification);
+            with_view_model(
+                app->view, (UartDumpModel * model) { return true; });
+        }
+    }
+
+    return 0;
+}
+
+static UartEchoApp* uart_echo_app_alloc() {
+    UartEchoApp* app = furi_alloc(sizeof(UartEchoApp));
+
+    app->rx_stream = xStreamBufferCreate(2048, 1);
+
+    // Gui
+    app->gui = furi_record_open("gui");
+    app->notification = furi_record_open("notification");
+
+    // View dispatcher
+    app->view_dispatcher = view_dispatcher_alloc();
+    view_dispatcher_enable_queue(app->view_dispatcher);
+    view_dispatcher_attach_to_gui(app->view_dispatcher, app->gui, ViewDispatcherTypeFullscreen);
+
+    // Views
+    app->view = view_alloc();
+    view_set_draw_callback(app->view, uart_echo_view_draw_callback);
+    view_set_input_callback(app->view, uart_echo_view_input_callback);
+    view_allocate_model(app->view, ViewModelTypeLocking, sizeof(UartDumpModel));
+    with_view_model(
+        app->view, (UartDumpModel * model) {
+            for(size_t i = 0; i < LINES_ON_SCREEN; i++) {
+                model->line = 0;
+                model->escape = false;
+                model->list[i] = furi_alloc(sizeof(ListElement));
+                string_init(model->list[i]->text);
+            }
+            return true;
+        });
+
+    view_set_previous_callback(app->view, uart_echo_exit);
+    view_dispatcher_add_view(app->view_dispatcher, 0, app->view);
+    view_dispatcher_switch_to_view(app->view_dispatcher, 0);
+
+    // Enable uart listener
+    furi_hal_console_disable();
+    furi_hal_uart_set_br(FuriHalUartIdUSART1, 115200);
+    furi_hal_uart_set_irq_cb(FuriHalUartIdUSART1, uart_echo_on_irq_cb, app);
+
+    app->worker_thread = furi_thread_alloc();
+    furi_thread_set_name(app->worker_thread, "UsbUartWorker");
+    furi_thread_set_stack_size(app->worker_thread, 1024);
+    furi_thread_set_context(app->worker_thread, app);
+    furi_thread_set_callback(app->worker_thread, uart_echo_worker);
+    furi_thread_start(app->worker_thread);
+
+    return app;
+}
+
+static void uart_echo_app_free(UartEchoApp* app) {
+    furi_assert(app);
+
+    osThreadFlagsSet(furi_thread_get_thread_id(app->worker_thread), WorkerEventStop);
+    furi_thread_join(app->worker_thread);
+    furi_thread_free(app->worker_thread);
+
+    furi_hal_console_enable();
+
+    // Free views
+    view_dispatcher_remove_view(app->view_dispatcher, 0);
+
+    with_view_model(
+        app->view, (UartDumpModel * model) {
+            for(size_t i = 0; i < LINES_ON_SCREEN; i++) {
+                string_clear(model->list[i]->text);
+                free(model->list[i]);
+            }
+            return true;
+        });
+    view_free(app->view);
+    view_dispatcher_free(app->view_dispatcher);
+
+    // Close gui record
+    furi_record_close("gui");
+    furi_record_close("notification");
+    app->gui = NULL;
+
+    vStreamBufferDelete(app->rx_stream);
+
+    // Free rest
+    free(app);
+}
+
+int32_t uart_echo_app(void* p) {
+    UartEchoApp* app = uart_echo_app_alloc();
+    view_dispatcher_run(app->view_dispatcher);
+    uart_echo_app_free(app);
+    return 0;
+}

applications/gpio/usb_uart_bridge.c

@@ -57,7 +57,7 @@ static CdcCallbacks cdc_cb = {
 
 static int32_t usb_uart_tx_thread(void* context);
 
-static void usb_uart_on_irq_cb(UartIrqEvent ev, uint8_t data) {
+static void usb_uart_on_irq_cb(UartIrqEvent ev, uint8_t data, void* context) {
     BaseType_t xHigherPriorityTaskWoken = pdFALSE;
 
     if(ev == UartIrqEventRXNE) {
@@ -94,10 +94,10 @@ static int32_t usb_uart_worker(void* context) {
         furi_hal_console_disable();
     } else if(usb_uart->cfg.uart_ch == FuriHalUartIdLPUART1) {
         furi_hal_uart_init(usb_uart->cfg.uart_ch, 115200);
-        furi_hal_uart_set_irq_cb(usb_uart->cfg.uart_ch, usb_uart_on_irq_cb);
+        furi_hal_uart_set_irq_cb(usb_uart->cfg.uart_ch, usb_uart_on_irq_cb, NULL);
     }
 
-    furi_hal_uart_set_irq_cb(usb_uart->cfg.uart_ch, usb_uart_on_irq_cb);
+    furi_hal_uart_set_irq_cb(usb_uart->cfg.uart_ch, usb_uart_on_irq_cb, NULL);
     if(usb_uart->cfg.baudrate != 0)
         furi_hal_uart_set_br(usb_uart->cfg.uart_ch, usb_uart->cfg.baudrate);
     else

firmware/targets/f6/furi-hal/furi-hal-console.c

@@ -24,7 +24,7 @@ void furi_hal_console_init() {
 }
 
 void furi_hal_console_enable() {
-    furi_hal_uart_set_irq_cb(FuriHalUartIdUSART1, NULL);
+    furi_hal_uart_set_irq_cb(FuriHalUartIdUSART1, NULL, NULL);
     while (!LL_USART_IsActiveFlag_TC(USART1));
     furi_hal_uart_set_br(FuriHalUartIdUSART1, CONSOLE_BAUDRATE);
     furi_hal_console_alive = true;

firmware/targets/f6/furi-hal/furi-hal-uart.c

@@ -6,7 +6,8 @@
 
 #include <furi.h>
 
-static void (*irq_cb[2])(uint8_t ev, uint8_t data);
+static void (*irq_cb[2])(uint8_t ev, uint8_t data, void* context);
+static void* irq_ctx[2];
 
 static void furi_hal_usart_init(uint32_t baud) {
     hal_gpio_init_ex(
@@ -38,7 +39,8 @@ static void furi_hal_usart_init(uint32_t baud) {
 
     LL_USART_Enable(USART1);
 
-    while(!LL_USART_IsActiveFlag_TEACK(USART1));
+    while(!LL_USART_IsActiveFlag_TEACK(USART1))
+        ;
 
     LL_USART_EnableIT_RXNE_RXFNE(USART1);
     LL_USART_EnableIT_IDLE(USART1);
@@ -74,7 +76,8 @@ static void furi_hal_lpuart_init(uint32_t baud) {
 
     LL_LPUART_Enable(LPUART1);
 
-    while((!(LL_LPUART_IsActiveFlag_TEACK(LPUART1))) || (!(LL_LPUART_IsActiveFlag_REACK(LPUART1))));
+    while((!(LL_LPUART_IsActiveFlag_TEACK(LPUART1))) || (!(LL_LPUART_IsActiveFlag_REACK(LPUART1))))
+        ;
 
     furi_hal_uart_set_br(FuriHalUartIdLPUART1, baud);
 
@@ -94,16 +97,19 @@ void furi_hal_uart_set_br(FuriHalUartId ch, uint32_t baud) {
     if(ch == FuriHalUartIdUSART1) {
         if(LL_USART_IsEnabled(USART1)) {
             // Wait for transfer complete flag
-            while (!LL_USART_IsActiveFlag_TC(USART1));
+            while(!LL_USART_IsActiveFlag_TC(USART1))
+                ;
             LL_USART_Disable(USART1);
             uint32_t uartclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART1_CLKSOURCE);
-            LL_USART_SetBaudRate(USART1, uartclk, LL_USART_PRESCALER_DIV1, LL_USART_OVERSAMPLING_16, baud);
+            LL_USART_SetBaudRate(
+                USART1, uartclk, LL_USART_PRESCALER_DIV1, LL_USART_OVERSAMPLING_16, baud);
             LL_USART_Enable(USART1);
         }
     } else if(ch == FuriHalUartIdLPUART1) {
         if(LL_LPUART_IsEnabled(LPUART1)) {
             // Wait for transfer complete flag
-            while (!LL_LPUART_IsActiveFlag_TC(LPUART1));
+            while(!LL_LPUART_IsActiveFlag_TC(LPUART1))
+                ;
             LL_LPUART_Disable(LPUART1);
             uint32_t uartclk = LL_RCC_GetLPUARTClockFreq(LL_RCC_LPUART1_CLKSOURCE);
             if(uartclk / baud > 4095) {
@@ -119,7 +125,7 @@ void furi_hal_uart_set_br(FuriHalUartId ch, uint32_t baud) {
 }
 
 void furi_hal_uart_deinit(FuriHalUartId ch) {
-    furi_hal_uart_set_irq_cb(ch, NULL);
+    furi_hal_uart_set_irq_cb(ch, NULL, NULL);
     if(ch == FuriHalUartIdUSART1) {
         LL_USART_Disable(USART1);
         hal_gpio_init(&gpio_usart_tx, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
@@ -133,11 +139,11 @@ void furi_hal_uart_deinit(FuriHalUartId ch) {
 
 void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size) {
     if(ch == FuriHalUartIdUSART1) {
-        if (LL_USART_IsEnabled(USART1) == 0)
+        if(LL_USART_IsEnabled(USART1) == 0) return;
-            return;
 
         while(buffer_size > 0) {
-            while (!LL_USART_IsActiveFlag_TXE(USART1));
+            while(!LL_USART_IsActiveFlag_TXE(USART1))
+                ;
 
             LL_USART_TransmitData8(USART1, *buffer);
             buffer++;
@@ -145,11 +151,11 @@ void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size) {
         }
 
     } else if(ch == FuriHalUartIdLPUART1) {
-        if (LL_LPUART_IsEnabled(LPUART1) == 0)
+        if(LL_LPUART_IsEnabled(LPUART1) == 0) return;
-            return;
 
         while(buffer_size > 0) {
-            while (!LL_LPUART_IsActiveFlag_TXE(LPUART1));
+            while(!LL_LPUART_IsActiveFlag_TXE(LPUART1))
+                ;
 
             LL_LPUART_TransmitData8(LPUART1, *buffer);
 
@@ -159,14 +165,19 @@ void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size) {
     }
 }
 
-void furi_hal_uart_set_irq_cb(FuriHalUartId ch, void (*cb)(UartIrqEvent ev, uint8_t data)) {
+void furi_hal_uart_set_irq_cb(
+    FuriHalUartId ch,
+    void (*cb)(UartIrqEvent ev, uint8_t data, void* ctx),
+    void* ctx) {
     if(cb == NULL) {
         if(ch == FuriHalUartIdUSART1)
             NVIC_DisableIRQ(USART1_IRQn);
         else if(ch == FuriHalUartIdLPUART1)
             NVIC_DisableIRQ(LPUART1_IRQn);
         irq_cb[ch] = cb;
+        irq_ctx[ch] = ctx;
     } else {
+        irq_ctx[ch] = ctx;
         irq_cb[ch] = cb;
         if(ch == FuriHalUartIdUSART1)
             NVIC_EnableIRQ(USART1_IRQn);
@@ -178,9 +189,9 @@ void furi_hal_uart_set_irq_cb(FuriHalUartId ch, void (*cb)(UartIrqEvent ev, uint
 void LPUART1_IRQHandler(void) {
     if(LL_LPUART_IsActiveFlag_RXNE_RXFNE(LPUART1)) {
         uint8_t data = LL_LPUART_ReceiveData8(LPUART1);
-        irq_cb[FuriHalUartIdLPUART1](UartIrqEventRXNE, data);
+        irq_cb[FuriHalUartIdLPUART1](UartIrqEventRXNE, data, irq_ctx[FuriHalUartIdLPUART1]);
     } else if(LL_LPUART_IsActiveFlag_IDLE(LPUART1)) {
-        irq_cb[FuriHalUartIdLPUART1](UartIrqEventIDLE, 0);
+        irq_cb[FuriHalUartIdLPUART1](UartIrqEventIDLE, 0, irq_ctx[FuriHalUartIdLPUART1]);
         LL_LPUART_ClearFlag_IDLE(LPUART1);
     } else if(LL_LPUART_IsActiveFlag_ORE(LPUART1)) {
         LL_LPUART_ClearFlag_ORE(LPUART1);
@@ -191,9 +202,9 @@ void LPUART1_IRQHandler(void) {
 void USART1_IRQHandler(void) {
     if(LL_USART_IsActiveFlag_RXNE_RXFNE(USART1)) {
         uint8_t data = LL_USART_ReceiveData8(USART1);
-        irq_cb[FuriHalUartIdUSART1](UartIrqEventRXNE, data);
+        irq_cb[FuriHalUartIdUSART1](UartIrqEventRXNE, data, irq_ctx[FuriHalUartIdUSART1]);
     } else if(LL_USART_IsActiveFlag_IDLE(USART1)) {
-        irq_cb[FuriHalUartIdUSART1](UartIrqEventIDLE, 0);
+        irq_cb[FuriHalUartIdUSART1](UartIrqEventIDLE, 0, irq_ctx[FuriHalUartIdUSART1]);
         LL_USART_ClearFlag_IDLE(USART1);
     } else if(LL_USART_IsActiveFlag_ORE(USART1)) {
         LL_USART_ClearFlag_ORE(USART1);

firmware/targets/f6/furi-hal/furi-hal-uart.h

@@ -1,3 +1,10 @@
+/**
+ * @file furi-hal-uart.h
+ * @version 1.0
+ * @date 2021-11-19
+ * 
+ * UART HAL api interface
+ */
 #pragma once
 
 #include <stddef.h>
@@ -7,26 +14,63 @@
 extern "C" {
 #endif
 
+/**
+ * UART channels
+ */
 typedef enum {
     FuriHalUartIdUSART1,
     FuriHalUartIdLPUART1,
 } FuriHalUartId;
 
+/**
+ * UART events
+ */
 typedef enum {
     UartIrqEventRXNE,
     UartIrqEventIDLE,
     //TODO: more events
 } UartIrqEvent;
 
-void furi_hal_uart_init(FuriHalUartId ch, uint32_t baud);
+/**
+ * Init UART
+ * Configures GPIO to UART function, сonfigures UART hardware, enables UART hardware
+ * @param channel UART channel
+ * @param baud baudrate
+ */
+void furi_hal_uart_init(FuriHalUartId channel, uint32_t baud);
 
-void furi_hal_uart_deinit(FuriHalUartId ch);
+/**
+ * Deinit UART
+ * Configures GPIO to analog, clears callback and callback context, disables UART hardware
+ * @param channel UART channel
+ */
+void furi_hal_uart_deinit(FuriHalUartId channel);
 
-void furi_hal_uart_set_br(FuriHalUartId ch, uint32_t baud);
+/**
+ * Changes UART baudrate
+ * @param channel UART channel
+ * @param baud baudrate
+ */
+void furi_hal_uart_set_br(FuriHalUartId channel, uint32_t baud);
 
-void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size);
+/**
+ * Transmits data
+ * @param channel UART channel
+ * @param buffer data
+ * @param buffer_size data size (in bytes)
+ */
+void furi_hal_uart_tx(FuriHalUartId channel, uint8_t* buffer, size_t buffer_size);
 
-void furi_hal_uart_set_irq_cb(FuriHalUartId ch, void (*cb)(UartIrqEvent ev, uint8_t data));
+/**
+ * Sets UART event callback
+ * @param channel UART channel
+ * @param callback callback pointer
+ * @param context callback context
+ */
+void furi_hal_uart_set_irq_cb(
+    FuriHalUartId channel,
+    void (*callback)(UartIrqEvent event, uint8_t data, void* context),
+    void* context);
 
 #ifdef __cplusplus
 }

firmware/targets/f7/furi-hal/furi-hal-console.c

@@ -24,32 +24,33 @@ void furi_hal_console_init() {
 }
 
 void furi_hal_console_enable() {
-    furi_hal_uart_set_irq_cb(FuriHalUartIdUSART1, NULL);
+    furi_hal_uart_set_irq_cb(FuriHalUartIdUSART1, NULL, NULL);
-    while (!LL_USART_IsActiveFlag_TC(USART1));
+    while(!LL_USART_IsActiveFlag_TC(USART1))
+        ;
     furi_hal_uart_set_br(FuriHalUartIdUSART1, CONSOLE_BAUDRATE);
     furi_hal_console_alive = true;
 }
 
 void furi_hal_console_disable() {
-    while (!LL_USART_IsActiveFlag_TC(USART1));
+    while(!LL_USART_IsActiveFlag_TC(USART1))
+        ;
     furi_hal_console_alive = false;
 }
 
 void furi_hal_console_tx(const uint8_t* buffer, size_t buffer_size) {
-    if (!furi_hal_console_alive)
+    if(!furi_hal_console_alive) return;
-        return;
 
     UTILS_ENTER_CRITICAL_SECTION();
     // Transmit data
     furi_hal_uart_tx(FuriHalUartIdUSART1, (uint8_t*)buffer, buffer_size);
     // Wait for TC flag to be raised for last char
-    while (!LL_USART_IsActiveFlag_TC(USART1));
+    while(!LL_USART_IsActiveFlag_TC(USART1))
+        ;
     UTILS_EXIT_CRITICAL_SECTION();
 }
 
 void furi_hal_console_tx_with_new_line(const uint8_t* buffer, size_t buffer_size) {
-    if (!furi_hal_console_alive)
+    if(!furi_hal_console_alive) return;
-        return;
 
     UTILS_ENTER_CRITICAL_SECTION();
     // Transmit data
@@ -57,7 +58,8 @@ void furi_hal_console_tx_with_new_line(const uint8_t* buffer, size_t buffer_size
     // Transmit new line symbols
     furi_hal_uart_tx(FuriHalUartIdUSART1, (uint8_t*)"\r\n", 2);
     // Wait for TC flag to be raised for last char
-    while (!LL_USART_IsActiveFlag_TC(USART1));
+    while(!LL_USART_IsActiveFlag_TC(USART1))
+        ;
     UTILS_EXIT_CRITICAL_SECTION();
 }
 

firmware/targets/f7/furi-hal/furi-hal-uart.c

@@ -6,7 +6,8 @@
 
 #include <furi.h>
 
-static void (*irq_cb[2])(uint8_t ev, uint8_t data);
+static void (*irq_cb[2])(uint8_t ev, uint8_t data, void* context);
+static void* irq_ctx[2];
 
 static void furi_hal_usart_init(uint32_t baud) {
     hal_gpio_init_ex(
@@ -38,7 +39,8 @@ static void furi_hal_usart_init(uint32_t baud) {
 
     LL_USART_Enable(USART1);
 
-    while(!LL_USART_IsActiveFlag_TEACK(USART1));
+    while(!LL_USART_IsActiveFlag_TEACK(USART1))
+        ;
 
     LL_USART_EnableIT_RXNE_RXFNE(USART1);
     LL_USART_EnableIT_IDLE(USART1);
@@ -74,7 +76,8 @@ static void furi_hal_lpuart_init(uint32_t baud) {
 
     LL_LPUART_Enable(LPUART1);
 
-    while((!(LL_LPUART_IsActiveFlag_TEACK(LPUART1))) || (!(LL_LPUART_IsActiveFlag_REACK(LPUART1))));
+    while((!(LL_LPUART_IsActiveFlag_TEACK(LPUART1))) || (!(LL_LPUART_IsActiveFlag_REACK(LPUART1))))
+        ;
 
     furi_hal_uart_set_br(FuriHalUartIdLPUART1, baud);
 
@@ -94,16 +97,19 @@ void furi_hal_uart_set_br(FuriHalUartId ch, uint32_t baud) {
     if(ch == FuriHalUartIdUSART1) {
         if(LL_USART_IsEnabled(USART1)) {
             // Wait for transfer complete flag
-            while (!LL_USART_IsActiveFlag_TC(USART1));
+            while(!LL_USART_IsActiveFlag_TC(USART1))
+                ;
             LL_USART_Disable(USART1);
             uint32_t uartclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART1_CLKSOURCE);
-            LL_USART_SetBaudRate(USART1, uartclk, LL_USART_PRESCALER_DIV1, LL_USART_OVERSAMPLING_16, baud);
+            LL_USART_SetBaudRate(
+                USART1, uartclk, LL_USART_PRESCALER_DIV1, LL_USART_OVERSAMPLING_16, baud);
             LL_USART_Enable(USART1);
         }
     } else if(ch == FuriHalUartIdLPUART1) {
         if(LL_LPUART_IsEnabled(LPUART1)) {
             // Wait for transfer complete flag
-            while (!LL_LPUART_IsActiveFlag_TC(LPUART1));
+            while(!LL_LPUART_IsActiveFlag_TC(LPUART1))
+                ;
             LL_LPUART_Disable(LPUART1);
             uint32_t uartclk = LL_RCC_GetLPUARTClockFreq(LL_RCC_LPUART1_CLKSOURCE);
             if(uartclk / baud > 4095) {
@@ -119,7 +125,7 @@ void furi_hal_uart_set_br(FuriHalUartId ch, uint32_t baud) {
 }
 
 void furi_hal_uart_deinit(FuriHalUartId ch) {
-    furi_hal_uart_set_irq_cb(ch, NULL);
+    furi_hal_uart_set_irq_cb(ch, NULL, NULL);
     if(ch == FuriHalUartIdUSART1) {
         LL_USART_Disable(USART1);
         hal_gpio_init(&gpio_usart_tx, GpioModeAnalog, GpioPullNo, GpioSpeedLow);
@@ -133,11 +139,11 @@ void furi_hal_uart_deinit(FuriHalUartId ch) {
 
 void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size) {
     if(ch == FuriHalUartIdUSART1) {
-        if (LL_USART_IsEnabled(USART1) == 0)
+        if(LL_USART_IsEnabled(USART1) == 0) return;
-            return;
 
         while(buffer_size > 0) {
-            while (!LL_USART_IsActiveFlag_TXE(USART1));
+            while(!LL_USART_IsActiveFlag_TXE(USART1))
+                ;
 
             LL_USART_TransmitData8(USART1, *buffer);
             buffer++;
@@ -145,11 +151,11 @@ void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size) {
         }
 
     } else if(ch == FuriHalUartIdLPUART1) {
-        if (LL_LPUART_IsEnabled(LPUART1) == 0)
+        if(LL_LPUART_IsEnabled(LPUART1) == 0) return;
-            return;
 
         while(buffer_size > 0) {
-            while (!LL_LPUART_IsActiveFlag_TXE(LPUART1));
+            while(!LL_LPUART_IsActiveFlag_TXE(LPUART1))
+                ;
 
             LL_LPUART_TransmitData8(LPUART1, *buffer);
 
@@ -159,14 +165,19 @@ void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size) {
     }
 }
 
-void furi_hal_uart_set_irq_cb(FuriHalUartId ch, void (*cb)(UartIrqEvent ev, uint8_t data)) {
+void furi_hal_uart_set_irq_cb(
+    FuriHalUartId ch,
+    void (*cb)(UartIrqEvent ev, uint8_t data, void* ctx),
+    void* ctx) {
     if(cb == NULL) {
         if(ch == FuriHalUartIdUSART1)
             NVIC_DisableIRQ(USART1_IRQn);
         else if(ch == FuriHalUartIdLPUART1)
             NVIC_DisableIRQ(LPUART1_IRQn);
         irq_cb[ch] = cb;
+        irq_ctx[ch] = ctx;
     } else {
+        irq_ctx[ch] = ctx;
         irq_cb[ch] = cb;
         if(ch == FuriHalUartIdUSART1)
             NVIC_EnableIRQ(USART1_IRQn);
@@ -178,9 +189,9 @@ void furi_hal_uart_set_irq_cb(FuriHalUartId ch, void (*cb)(UartIrqEvent ev, uint
 void LPUART1_IRQHandler(void) {
     if(LL_LPUART_IsActiveFlag_RXNE_RXFNE(LPUART1)) {
         uint8_t data = LL_LPUART_ReceiveData8(LPUART1);
-        irq_cb[FuriHalUartIdLPUART1](UartIrqEventRXNE, data);
+        irq_cb[FuriHalUartIdLPUART1](UartIrqEventRXNE, data, irq_ctx[FuriHalUartIdLPUART1]);
     } else if(LL_LPUART_IsActiveFlag_IDLE(LPUART1)) {
-        irq_cb[FuriHalUartIdLPUART1](UartIrqEventIDLE, 0);
+        irq_cb[FuriHalUartIdLPUART1](UartIrqEventIDLE, 0, irq_ctx[FuriHalUartIdLPUART1]);
         LL_LPUART_ClearFlag_IDLE(LPUART1);
     } else if(LL_LPUART_IsActiveFlag_ORE(LPUART1)) {
         LL_LPUART_ClearFlag_ORE(LPUART1);
@@ -191,9 +202,9 @@ void LPUART1_IRQHandler(void) {
 void USART1_IRQHandler(void) {
     if(LL_USART_IsActiveFlag_RXNE_RXFNE(USART1)) {
         uint8_t data = LL_USART_ReceiveData8(USART1);
-        irq_cb[FuriHalUartIdUSART1](UartIrqEventRXNE, data);
+        irq_cb[FuriHalUartIdUSART1](UartIrqEventRXNE, data, irq_ctx[FuriHalUartIdUSART1]);
     } else if(LL_USART_IsActiveFlag_IDLE(USART1)) {
-        irq_cb[FuriHalUartIdUSART1](UartIrqEventIDLE, 0);
+        irq_cb[FuriHalUartIdUSART1](UartIrqEventIDLE, 0, irq_ctx[FuriHalUartIdUSART1]);
         LL_USART_ClearFlag_IDLE(USART1);
     } else if(LL_USART_IsActiveFlag_ORE(USART1)) {
         LL_USART_ClearFlag_ORE(USART1);

firmware/targets/f7/furi-hal/furi-hal-uart.h

@@ -1,3 +1,10 @@
+/**
+ * @file furi-hal-uart.h
+ * @version 1.0
+ * @date 2021-11-19
+ * 
+ * UART HAL api interface
+ */
 #pragma once
 
 #include <stddef.h>
@@ -7,26 +14,63 @@
 extern "C" {
 #endif
 
+/**
+ * UART channels
+ */
 typedef enum {
     FuriHalUartIdUSART1,
     FuriHalUartIdLPUART1,
 } FuriHalUartId;
 
+/**
+ * UART events
+ */
 typedef enum {
     UartIrqEventRXNE,
     UartIrqEventIDLE,
     //TODO: more events
 } UartIrqEvent;
 
-void furi_hal_uart_init(FuriHalUartId ch, uint32_t baud);
+/**
+ * Init UART
+ * Configures GPIO to UART function, сonfigures UART hardware, enables UART hardware
+ * @param channel UART channel
+ * @param baud baudrate
+ */
+void furi_hal_uart_init(FuriHalUartId channel, uint32_t baud);
 
-void furi_hal_uart_deinit(FuriHalUartId ch);
+/**
+ * Deinit UART
+ * Configures GPIO to analog, clears callback and callback context, disables UART hardware
+ * @param channel UART channel
+ */
+void furi_hal_uart_deinit(FuriHalUartId channel);
 
-void furi_hal_uart_set_br(FuriHalUartId ch, uint32_t baud);
+/**
+ * Changes UART baudrate
+ * @param channel UART channel
+ * @param baud baudrate
+ */
+void furi_hal_uart_set_br(FuriHalUartId channel, uint32_t baud);
 
-void furi_hal_uart_tx(FuriHalUartId ch, uint8_t* buffer, size_t buffer_size);
+/**
+ * Transmits data
+ * @param channel UART channel
+ * @param buffer data
+ * @param buffer_size data size (in bytes)
+ */
+void furi_hal_uart_tx(FuriHalUartId channel, uint8_t* buffer, size_t buffer_size);
 
-void furi_hal_uart_set_irq_cb(FuriHalUartId ch, void (*cb)(UartIrqEvent ev, uint8_t data));
+/**
+ * Sets UART event callback
+ * @param channel UART channel
+ * @param callback callback pointer
+ * @param context callback context
+ */
+void furi_hal_uart_set_irq_cb(
+    FuriHalUartId channel,
+    void (*callback)(UartIrqEvent event, uint8_t data, void* context),
+    void* context);
 
 #ifdef __cplusplus
 }