Implement EEPROM and use it for saving the calibration

stm-firmware/main.c

@@ -46,6 +46,7 @@
 #include <reflow-controller/safety/safety-memory.h>
 #include <reflow-controller/safety/fault.h>
 #include <reflow-controller/updater/updater.h>
+
 #include <reflow-controller/settings/spi-eeprom.h>
 
 static void setup_nvic_priorities(void)
@@ -179,7 +180,7 @@ static inline void setup_system(void)
 	loudspeaker_setup();
 	gui_init();
 	uart_gpio_config();
-	spi_eeprom_init();
+	settings_setup();
 
 	handle_boot_status();
 
@@ -210,8 +211,15 @@ int main(void)
 	shellmatta_handle_t shell_handle;
 	int menu_wait_request;
 	uint64_t quarter_sec_timestamp = 0ULL;
+
 	setup_system();
 
+	/* Try load the calibration. This will only succeed if there's an EEPROM */
+	status = settings_load_calibration(&sens, &offset);
+	if (!status) {
+		adc_pt1000_set_resistance_calibration(offset, sens, true);
+	}
+
 	shell_handle = shell_init(write_shell_callback);
 	shell_print_motd(shell_handle);