Store the configuration on the SD card

sdcard.c

@@ -6,6 +6,7 @@
 #include "timer.h"
 #include "event.h"
 #include "log.h"
+#include "config.h"
 
 #define spi_write_array(x) spi_write_bytes(x, sizeof(x)/sizeof(x[0]))
 
@@ -492,6 +493,7 @@ void sdcard_prepare(void)
 {
 	unsigned int magic;
 	unsigned int start_sector;
+	unsigned int config_sector;
 	unsigned int count;
 
 	if (!sdcard_read(0, log_buffer, 512))
@@ -506,10 +508,12 @@ void sdcard_prepare(void)
 		WRITE_UINT(log_buffer, 0, LOG_MAGIC);
 		start_sector = SDCARD_BOUNDARY_SIZE;
 		log_generation = 0;
+		config_sector = 1;
 		putstr("Did not find header. Formatting.\r\n");
 	} else {
 		start_sector = READ_UINT(log_buffer, 4);
 		log_generation = READ_UINT(log_buffer, 8);
+		config_sector = READ_UINT(log_buffer, 12);
 		count = 0;
 		putstr("Found header.\r\n");
 		putstr("Last started at sector ");
@@ -539,6 +543,7 @@ void sdcard_prepare(void)
 
 	WRITE_UINT(log_buffer, 4, start_sector);
 	WRITE_UINT(log_buffer, 8, log_generation);
+	WRITE_UINT(log_buffer, 12, config_sector);
 
 	putstr("Starting at sector ");
 	putint(start_sector);
@@ -551,7 +556,13 @@ void sdcard_prepare(void)
 
 	sdcard_sector = start_sector;
 	sdcard_offset = 0;
+
+	if (!sdcard_read(config_sector, log_buffer, 512))
+		return;
+
 	log_enabled = TRUE;
+
+	config_init(log_buffer);
 }