Implement flash config storage

Calibration needs to be saved for each badge in continuity mode. Added a flash-backed user config storing option with basic wear leveling. Have NOT yet tested the write and erase functions.

include/flash.h

@@ -16,9 +16,39 @@
 #define FLASH_HSI_24MHz		(uint32_t *)0x1FFF0F6C
 
 
+#define UCONF_FLASH_SIZE	512
+#define UCONF_FLASH_START	(FLASH_END + 1) - UCONF_FLASH_SIZE
+
+#define UCONF_SIZE			64		// size in bytes
+#define UCONF_COUNT			(UCONF_FLASH_SIZE / UCONF_SIZE)
+
+#define UCONF_KEY			0x3713
+
+
+
+typedef struct UConf {
+	uint16_t conf_key;				// should read 0x3713
+	uint8_t  cont_buzzer;			// continuity buzzer on/off
+	uint8_t  cont_sensitivity;		// continuity sensitivity high/low
+	uint16_t cont_shorted;			// ADC counts when probes shorted in continuity mode
+	uint16_t diode_shorted;			// unused, unneeded
+	uint32_t rsvd_1[4];
+	uint32_t rsvd_2[8];
+	uint32_t vctr;					// increment every update of config
+	uint32_t crc32;					// CRC of preceding 60 bytes
+} UConf;							// 64 bytes
+
+
+
+extern struct UConf conf;
+
+
 
 void flash_init();
 
+void flash_load_conf();
+void flash_commit_conf();
+
 
 
 #endif /* _INC_FLASH_H */

include/rgbprog.h

@@ -14,7 +14,7 @@
 
 void rgbprog_run();
 
-void rgbprog_error_flasher(uint8_t r, uint8_t g, uint8_t b);
+void rgbprog_error_flasher(uint8_t scale, uint8_t r, uint8_t g, uint8_t b);