add master mode

main.c

@@ -285,6 +285,8 @@ static void nec_transmit(uint32_t code)
 
 void main(void)
 {
+	bool master = false; // if we are not a slave badge, but master controller
+
 	sim(); // disable interrupts (while we reconfigure them)
 
 	CLK->CKDIVR.fields.HSIDIV = CLK_CKDIVR_HSIDIV_DIV0; // don't divide internal 16 MHz clock
@@ -454,7 +456,7 @@ void main(void)
 			putc('t');
 			action = true; // redo main loop
 		}
-		if (time_count > 488UL * REST_TIME) {
+		if (time_count > 488UL * REST_TIME && !master) {
 			puts("rest\r\n");
 			time_count = 0; // reset counter
 			LED_UV_PORT->ODR.reg &= ~LED_UV_PIN; // switch UV LED off
@@ -484,6 +486,29 @@ void main(void)
 						timer_ir_in(); // go back to IR capture
 						puts("\r\ncode transmitted\r\n");
 					}
+				} else  if (uart_used >= 7 && 'M' == uart_cmd[0]) { // switch to master
+					bool code_valid = true; // verify it it's really a hex string
+					uint32_t code = 0x02000000; // parsed master code
+					for (uint8_t i = 0; i < 6; i++) {
+						uint32_t n = a2n(uart_cmd[1 + i]);
+						if (n > 0xf) {
+							code_valid = false;
+							break;
+						} else {
+							code |= (n << ((i + 1) * 4));
+						}
+					}
+					if (code_valid) {
+						rgb[0] = code >> 8; // save color
+						rgb[1] = code >> 16; // save color
+						rgb[2] = code >> 24; // save color
+						led_rgb(rgb); // set color
+						nec_transmit(code); // transmit code
+						if (!master) {
+							master = true; // switch to master mode
+							puts("\r\nmaster set\r\n");
+						}
+					}
 				}
 				uart_used = 0; // reset buffer
 			} else if (uart_used < ARRAY_LENGTH(uart_cmd)) {