add power setting

firmware/main.c

@@ -337,7 +337,7 @@ int main(void)
 
 	puts("LED dimmer up & running");
 
-	/* load settings */
+	// load (or initialize) settings
 	if (!verify_settings()) {
 		initialize_settings();
 		save_settings();
@@ -351,6 +351,13 @@ int main(void)
 		puts("settings loaded");
 	}
 	
+	// switch power supply as saved
+	if (power) {
+		PORTB &= ~(1<<nPS_ON);
+	} else {
+		PORTB |= (1<<nPS_ON);
+	}
+	
 	while (true) {
 		/* calculated PWM values */
 		while (channel_flag) {
@@ -406,15 +413,19 @@ int main(void)
 		while (power_flag) {
 			if (pwr_ok) {
 				puts("power ok");
+				power = 1;
 				/* verify if FAN is present */
 				_delay_ms(500);
 				if (0==tachometer) {
 					puts("FAN not on, switching power off");
 					PORTB |= (1<<nPS_ON);
+					power = 0;
 				}
 			} else {
 				puts("power off");
+				power = 0;
 			}
+			save_settings();
 			power_flag = false;
 		}
 		/* handle IR input */
@@ -436,13 +447,13 @@ int main(void)
 							ir_keys[to_learn][0] = ir_data.address;
 							ir_keys[to_learn][1] = ir_data.command;
 						}
-						save_settings();
 						puts("IR code learned");
 						to_learn = IR_ACTION_END;
 						learn_flag = false;
 					} else {
 						ir_action(ir_data.address,ir_data.command);
 					}
+					save_settings();
 				}
 			}
 			pulse = 0; /* reset burst */

firmware/settings.c

@@ -7,8 +7,9 @@
 #include "settings.h"
 
 /* initialize variable */
-uint8_t brightness[MODES][CHANNELS_1+CHANNELS_2];
+uint8_t power;
 uint8_t mode;
+uint8_t brightness[MODES][CHANNELS_1+CHANNELS_2];
 uint8_t ir_keys[IR_ACTION_END][2];
 
 const uint8_t MAGIC = 0x42; // magic header
@@ -18,7 +19,7 @@ bool verify_settings(void)
 	bool to_return;
 	uint8_t checksum = 0;
 	uint8_t byte;
-	uint16_t settings_size = 1+sizeof(mode)+sizeof(brightness)+sizeof(ir_keys)+1; // the byte used for the checksum (magic header and checksum included)
+	uint16_t settings_size = sizeof(MAGIC)+sizeof(power)+sizeof(mode)+sizeof(brightness)+sizeof(ir_keys)+1; // the byte used for the checksum (magic header and checksum included)
 	for (uint16_t i=0; i<settings_size; i++) {
 		byte = eeprom_read_byte((const uint8_t*)i);
 		checksum ^= byte;
@@ -33,6 +34,7 @@ bool verify_settings(void)
 
 void initialize_settings(void)
 {
+	power = 0;
 	mode = 0;
 	for (uint8_t i=0; i<MODES; i++) {
 		for (uint8_t j=0; j<CHANNELS_1+CHANNELS_2; j++) {
@@ -52,6 +54,9 @@ void save_settings(void)
 	eeprom_update_byte((uint8_t*)addr,MAGIC);
 	checksum ^= MAGIC;
 	addr++;
+	eeprom_update_byte((uint8_t*)addr,power);
+	checksum ^= power;
+	addr++;
 	eeprom_update_byte((uint8_t*)addr,mode);
 	checksum ^= mode;
 	addr++;
@@ -76,6 +81,8 @@ void save_settings(void)
 void load_settings(void)
 {
 	uint16_t addr = 1; // the address in the EEPROM (skip magic header)
+	power = eeprom_read_byte((uint8_t*)addr);
+	addr++;
 	mode = eeprom_read_byte((uint8_t*)addr);
 	addr++;
 	for (uint8_t i=0; i<MODES; i++) {

firmware/settings.h

@@ -1,6 +1,7 @@
 /* mode settings */
 #define MODES 3 /* the number of modes */
-extern uint8_t mode; /* the current mode */ //TODO load the mode
+extern uint8_t power; /* power state */
+extern uint8_t mode; /* the current mode */
 extern uint8_t brightness[MODES][CHANNELS_1+CHANNELS_2]; /* the mode brightness settings for the channels */
 
 /* IR settings */