#FL-303 fix for some spi bugs, test app for sd-nfc interconnection (#247)

* sd-nfc test app

* do not hold spi in disable mode

* disable pullups in nfc chip

applications/sd-nfc/sdnfc.cpp

@@ -0,0 +1,164 @@
+#include "app-template.h"
+
+extern "C" {
+#include <rfal_analogConfig.h>
+#include <rfal_rf.h>
+#include <rfal_nfc.h>
+#include <rfal_nfca.h>
+#include <st25r3916.h>
+#include <st25r3916_irq.h>
+}
+
+#include "fatfs/ff.h"
+#include "stm32_adafruit_sd.h"
+
+// event enumeration type
+typedef uint8_t event_t;
+
+// app state class
+class AppSdNFCState {
+public:
+    // state data
+    const char* name;
+
+    // state initializer
+    AppSdNFCState() {
+        name = "sd nfc test";
+    }
+};
+
+// app events class
+class AppSdNFCEvent {
+public:
+    // events enum
+    static const event_t EventTypeTick = 0;
+    static const event_t EventTypeKey = 1;
+
+    // payload
+    union {
+        InputEvent input;
+    } value;
+
+    // event type
+    event_t type;
+};
+
+// our app derived from base AppTemplate class
+// with template variables <state, events>
+class AppSdNFC : public AppTemplate<AppSdNFCState, AppSdNFCEvent> {
+public:
+    GpioPin* red_led_record;
+    GpioPin* green_led_record;
+
+    void run();
+    void render(CanvasApi* canvas);
+    void set_error(const char* text);
+    void set_text(const char* text);
+    void light_red();
+    void light_green();
+    void blink_red();
+    void blink_green();
+};
+
+FATFS sd_fat_fs;
+char sd_path[6] = "";
+
+// start app
+void AppSdNFC::run() {
+    // create pin
+    GpioPin red_led = led_gpio[0];
+    GpioPin green_led = led_gpio[1];
+
+    // TODO open record
+    red_led_record = &red_led;
+    green_led_record = &green_led;
+
+    // configure pin
+    gpio_init(red_led_record, GpioModeOutputOpenDrain);
+    gpio_init(green_led_record, GpioModeOutputOpenDrain);
+
+    uint8_t rfal_result = rfalNfcInitialize();
+    if(rfal_result) {
+        set_text("rfal init fail");
+        blink_red();
+    }
+
+    uint8_t bsp_result = BSP_SD_Init();
+    if(bsp_result) {
+        set_error("sd init fail");
+    }
+
+    FRESULT result;
+
+    result = f_mount(&sd_fat_fs, sd_path, 1);
+    if(result) {
+        set_error("sd mount fail");
+    }
+
+    light_green();
+    set_text("all good");
+
+    AppSdNFCEvent event;
+    while(1) {
+        if(get_event(&event, 1000)) {
+            if(event.type == AppSdNFCEvent::EventTypeKey) {
+                // press events
+                if(event.value.input.state && event.value.input.input == InputBack) {
+                    exit();
+                }
+            }
+        }
+
+        // signal to force gui update
+        update_gui();
+    };
+}
+
+// render app
+void AppSdNFC::render(CanvasApi* canvas) {
+    canvas->set_color(canvas, ColorBlack);
+    canvas->set_font(canvas, FontPrimary);
+    canvas->draw_str(canvas, 2, 12, state.name);
+}
+
+void AppSdNFC::set_error(const char* text) {
+    light_red();
+    set_text(text);
+    update_gui();
+    while(1)
+        ;
+}
+
+void AppSdNFC::set_text(const char* text) {
+    acquire_state();
+    state.name = text;
+    release_state();
+}
+
+void AppSdNFC::light_red() {
+    gpio_write(red_led_record, false);
+}
+
+void AppSdNFC::light_green() {
+    gpio_write(green_led_record, false);
+}
+
+void AppSdNFC::blink_red() {
+    gpio_write(red_led_record, false);
+    delay(500);
+    gpio_write(red_led_record, true);
+    delay(500);
+}
+
+void AppSdNFC::blink_green() {
+    gpio_write(green_led_record, false);
+    delay(500);
+    gpio_write(green_led_record, true);
+    delay(500);
+}
+
+// app enter function
+extern "C" void sdnfc(void* p) {
+    AppSdNFC* app = new AppSdNFC();
+    app->run();
+}