add sound-reactive mode and pattern-cycling interrupt

1 files changed, 10 insertions, 10 deletions

diff --git a/led.c b/led.c
index 5ea9923..8d53dea 100644
--- a/led.c
+++ b/led.c
@@ -3,7 +3,7 @@
 
 #include <avr/io.h>
 
-void signal_bit_0() {
+static void signal_bit_0() {
 	asm volatile (
 		"sbi %0, %1\n\t"
 		"cbi %0, %1\n\t"
@@ -11,11 +11,11 @@ void signal_bit_0() {
 		"rjmp .+0\n\t"
 		"rjmp .+0\n\t"
 		:
-		: "I" (_SFR_IO_ADDR(PORTB)), "I" (PIN_LED)
+		: "I" (_SFR_IO_ADDR(PORTB)), "I" (LED_PIN)
 	);
 }
 
-void signal_bit_1() {
+static void signal_bit_1() {
 	asm volatile (
 		"sbi %0, %1\n\t"
 		"rjmp .+0\n\t"
@@ -24,11 +24,11 @@ void signal_bit_1() {
 		"rjmp .+0\n\t"
 		"nop\n\t"
 		:
-		: "I" (_SFR_IO_ADDR(PORTB)), "I" (PIN_LED)
+		: "I" (_SFR_IO_ADDR(PORTB)), "I" (LED_PIN)
 	);
 }
 
-void signal_byte(unsigned char byte) {
+static void signal_byte(unsigned char byte) {
 	for (unsigned char mask = 0x80; mask != 0; mask >>= 1) {
 		if (byte & mask)
 			signal_bit_1();
@@ -37,20 +37,20 @@ void signal_byte(unsigned char byte) {
 	}
 }
 
-void signal_led(struct colour *c) {
+static void signal_led(struct colour *c) {
 	signal_byte(c->r);
 	signal_byte(c->g);
 	signal_byte(c->b);
 }
 
-void signal_led_sequence(int num_leds, struct colour *seq, int num_seq, int width, int start) {
+void led_signal_sequence(int num_leds, struct colour *seq, int num_seq, int col_width, int seq_start) {
 	for(int i = 0; i < num_leds; ++i) {
-		int j, p = i - start;
+		int j, p = i - seq_start;
 
 		if (p >= 0)
-			j = (p / width % num_seq);
+			j = (p / col_width % num_seq);
 		else
-			j = (num_seq - ((p + 1) / -width % num_seq) - 1);
+			j = (num_seq - ((p + 1) / -col_width % num_seq) - 1);
 
 		signal_led(&seq[j]);
 	}