add u8g2 and ui libs (#91)

* add u8g2 and ui libs

* add display driver and usage example

* not init display in test mode

* change todo text

* fix removed code

* Target f2 (#107)

* add ioc for flipperzero f2

* add generated f1 files to f2

* regenerate cubemx

* invert initial state of led

* blink backligh

* shutdown backlight on idle

target_lo/Src/flipper_hal.c

@@ -38,4 +38,20 @@ void delay_us(uint32_t time) {
 
 void pwm_set(float value, float freq, TIM_HandleTypeDef* tim, uint32_t channel) {
     printf("[TIM] set pwm %d:%d %f Hz, %f%%\n", *tim, channel, freq, value * 100.);
-}
+}
+
+void HAL_GPIO_WritePin(const char* port, uint32_t pin, HAL_GPIO_PIN_STATE state) {
+    printf("[GPIO] set pin %s:%d = %d\n", port, pin, state);
+}
+
+HAL_StatusTypeDef HAL_SPI_Transmit(SPI_HandleTypeDef* hspi, uint8_t *pData, uint16_t size, uint32_t Timeout) {
+    printf("[SPI] write %d to %s: ", size, *hspi);
+    for(size_t i = 0; i < size; i++) {
+        printf("%02X ", pData[i]);
+    }
+    printf("\n");
+    
+    return 0;
+}
+
+SPI_HandleTypeDef hspi1 = "spi1";