sd detect pin feature (#222)

* test sd detect pin
* sd detect support for f2 board

firmware/Makefile

@@ -7,6 +7,7 @@ CPPFLAGS += -Werror
 include 		$(PROJECT_ROOT)/make/base.mk
 include			$(PROJECT_ROOT)/assets/assets.mk
 include			$(PROJECT_ROOT)/core/core.mk
+include			$(PROJECT_ROOT)/make/git.mk
 include 		$(PROJECT_ROOT)/applications/applications.mk
 include			$(PROJECT_ROOT)/lib/lib.mk
 

firmware/targets/f2/api-hal/api-hal-gpio.c

@@ -12,3 +12,7 @@ void hal_gpio_init(GpioPin* gpio, GpioMode mode, GpioPull pull, GpioSpeed speed)
 
     HAL_GPIO_Init(gpio->port, &GPIO_InitStruct);
 }
+
+bool hal_gpio_read_sd_detect(void) {
+    return true;
+}

firmware/targets/f2/api-hal/api-hal-gpio.h

@@ -58,4 +58,6 @@ static inline bool hal_gpio_read(const GpioPin* gpio) {
     } else {
         return false;
     }
-}
+}
+
+bool hal_gpio_read_sd_detect(void);

firmware/targets/f3/api-hal/api-hal-gpio.c

@@ -1,4 +1,5 @@
 #include "api-hal-gpio.h"
+#include "api-hal-resources.h"
 
 // init GPIO
 void hal_gpio_init(GpioPin* gpio, GpioMode mode, GpioPull pull, GpioSpeed speed) {
@@ -12,3 +13,24 @@ void hal_gpio_init(GpioPin* gpio, GpioMode mode, GpioPull pull, GpioSpeed speed)
 
     HAL_GPIO_Init(gpio->port, &GPIO_InitStruct);
 }
+
+bool hal_gpio_read_sd_detect(void) {
+    bool result = false;
+    // create pin
+    GpioPin sd_cs_pin = sd_cs_gpio;
+    // TODO open record
+    GpioPin* sd_cs_record = &sd_cs_pin;
+
+    // configure pin as input
+    gpio_init_ex(sd_cs_record, GpioModeInput, GpioPullUp, GpioSpeedVeryHigh);
+    delay(50);
+
+    // if gpio_read == 0 return true else return false
+    result = !gpio_read(sd_cs_record);
+
+    // configure pin back
+    gpio_init_ex(sd_cs_record, GpioModeOutputPushPull, GpioPullNo, GpioSpeedVeryHigh);
+    delay(50);
+
+    return result;
+}

firmware/targets/f3/api-hal/api-hal-gpio.h

@@ -58,4 +58,6 @@ static inline bool hal_gpio_read(const GpioPin* gpio) {
     } else {
         return false;
     }
-}
+}
+
+bool hal_gpio_read_sd_detect(void);

firmware/targets/f3/api-hal/api-hal-resources.c

@@ -24,4 +24,5 @@ const GpioPin led_gpio[3] = {
     {LED_GREEN_GPIO_Port, LED_GREEN_Pin},
     {LED_BLUE_GPIO_Port, LED_BLUE_Pin}};
 
-const GpioPin backlight_gpio = {DISPLAY_BACKLIGHT_GPIO_Port, DISPLAY_BACKLIGHT_Pin};
+const GpioPin backlight_gpio = {DISPLAY_BACKLIGHT_GPIO_Port, DISPLAY_BACKLIGHT_Pin};
+const GpioPin sd_cs_gpio = {SD_CS_GPIO_Port, SD_CS_Pin};

firmware/targets/f3/api-hal/api-hal-resources.h

@@ -9,4 +9,5 @@ extern const GpioPin input_gpio[GPIO_INPUT_PINS_COUNT];
 extern const bool input_invert[GPIO_INPUT_PINS_COUNT];
 
 extern const GpioPin led_gpio[3];
-extern const GpioPin backlight_gpio;
+extern const GpioPin backlight_gpio;
+extern const GpioPin sd_cs_gpio;