From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Wed, 29 Aug 2012 14:25:00 +0000 (+0200)
Subject: pwmled.c: enabling/disabling functions
X-Git-Tag: gedasymbols-20120913~39
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=bike-lights.git;a=commitdiff_plain;h=4dcd70de690010bdf0a3489d06508f2ab624b474

pwmled.c: enabling/disabling functions
---

diff --git a/pwmled.c b/pwmled.c
index df8bc07..5c816b3 100644
--- a/pwmled.c
+++ b/pwmled.c
@@ -12,6 +12,7 @@ static unsigned char adc_vals[N_PWMLEDS*N_PWMLED_MODES] = {
 	0x04, 0x14, 0x24, 0x38,
 };
 
+// TODO: maybe convert this to bitmask to simplify pwmled_needs_adc() ?
 static unsigned char pwmled_state[N_PWMLEDS];
 #define ST_DISABLED 0
 #define ST_PROBING  1
@@ -51,6 +52,34 @@ unsigned char pwmled_needs_adc(unsigned char n)
 		return 0;
 }
 
+unsigned char pwmled_enabled(unsigned char n)
+{
+	unsigned char st = pwmled_state[n];
+	if (st == ST_OFF || st == ST_ON)
+		return 1;
+	else
+		return 0;
+}
+
+void pwmled_set_mode(unsigned char n, unsigned char mode)
+{
+	if (!pwmled_enabled(n))
+		return;
+
+	if (mode == 0) {
+		pwm_off(n);
+		pwmled_state[n] = ST_OFF;
+		return;
+	}
+
+	if (mode <= N_PWMLED_MODES) {
+		mode--;
+		pwm_set(n, pwm_vals[n*N_PWMLED_MODES+mode]);
+		pwmled_state[n] = ST_ON;
+		pwmled_mode[n] = mode;
+	}
+}
+
 static void inline probing_adc(unsigned char n, uint16_t adcval)
 {
 	unsigned char need_bigger = 0, i;