Add FatFS hello world. Will be removed but shows, that device is functional

stm-firmware/main.c

@@ -39,6 +39,7 @@
 #include <stm-periph/uart.h>
 #include <reflow-controller/shell-uart-config.h>
 #include <helper-macros/helper-macros.h>
+#include <fatfs/ff.h>
 
 static void setup_nvic_priorities()
 {
@@ -101,8 +102,12 @@ static inline void setup_sell_uart(struct stm_uart *uart)
 	NVIC_EnableIRQ(DMA2_Stream7_IRQn);
 }
 
+const char *oven_controller_hello_world = "Hello world :)\n";
+
 int main()
 {
+	FATFS fs;
+	FIL test_file;
 	const char *uart_input;
 	size_t uart_input_len;
 	shellmatta_handle_t shell_handle;
@@ -123,6 +128,13 @@ int main()
 
 	shell_handle = shell_init(write_shell_callback);
 
+	if (f_mount(&fs, "0:/", 1) == FR_OK) {
+		f_open(&test_file, "hello-world.txt", FA_OPEN_APPEND | FA_WRITE);
+		f_write(&test_file, oven_controller_hello_world, strlen(oven_controller_hello_world), NULL);
+		f_close(&test_file);
+	}
+
+
 	while (1) {
 		pt1000_value_status = adc_pt1000_get_current_resistance(&pt1000_value);
 		rot = rotary_encoder_get_abs_val();
@@ -133,6 +145,11 @@ int main()
 
 }
 
+void sdio_wait_ms(uint32_t ms)
+{
+	systick_wait_ms(ms);
+}
+
 void DMA2_Stream7_IRQHandler()
 {
 	uint32_t hisr = DMA2->HISR;