1 files changed, 12 insertions, 16 deletions

diff --git a/src/main.c b/src/main.c
index 8fc4dba..352fe41 100644
--- a/src/main.c
+++ b/src/main.c
@@ -56,15 +56,9 @@ void shieldConfig() {
 	GPIOB->PUPDR &= ~(0b11 << (PINOUT_BTN * 2));
 	GPIOB->PUPDR |=  (0b01 << (PINOUT_BTN * 2));
 
-	ADC1->SMPR &= ~(0x7);
-	// ADC1->SMPR |=  (0x7);
-
 	// calirate ADC1
   ADC1->CR |= ADC_CR_ADCAL;
-  while ((ADC1->CR & ADC_CR_ADCAL));
-
-	// enable ADC V_REFINT
-  ADC->CCR |= ADC_CCR_VREFEN;
+  while (ADC1->CR & ADC_CR_ADCAL);
 
 	// enable ADC1
   ADC1->CR |= ADC_CR_ADEN;
@@ -101,10 +95,6 @@ unsigned int potRead() {
 	return result;
 }
 
-void delay(int amount) {
-	for (int i = 0; i < 500 * amount; i++) asm("nop");
-}
-
 int mod(int a, int b) {
   int m = a % b;
   return m < 0 ? (b < 0) ? m - b : m + b : m;
@@ -121,6 +111,7 @@ int main() {
 
 	uint8_t reverse = 0;
 	uint8_t led = 0;
+	unsigned long cycles = 0;
 	button_state state = up_idle;
 
 	while (1) {
@@ -143,13 +134,18 @@ int main() {
 		
 		if (state == pressed) reverse ^= 1;
 
-		for(int j = 0; j < 4; j++) ledWrite(j, 0);
+		unsigned int delay_amount = 4e3 + 8e3 * potRead();
+		if (cycles >= delay_amount) {
+			for(int j = 0; j < 4; j++) ledWrite(j, 0);
+
+			// calculate next led index
+			led = mod(led + ((2 * reverse) - 1), 4);
 
-		// calculate next led index
-		led = mod(led + ((2 * reverse) - 1), 4);
+			ledWrite(led, 1);
 
-		ledWrite(led, 1);
+			cycles = 0;
+		}
 
-		delay(100 + 300 * potRead());
+		cycles += 1;
 	}
 }