From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Mon, 3 Jun 2013 15:11:26 +0000 (+0200)
Subject: pwm.c: channels running - visible from the outside
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=bike-lights.git;a=commitdiff_plain;h=65c3ad96cf307c3b77b36e6f6a2af5201c213a3c

pwm.c: channels running - visible from the outside

Make the status of T/C1 visible from the outside, in order to
make the on-demand ADC channel selection possible, and also
to allow selecting the sleep modes in the main loop.
---

diff --git a/firmware/lights.h b/firmware/lights.h
index 0705dd1..72b719b 100644
--- a/firmware/lights.h
+++ b/firmware/lights.h
@@ -37,6 +37,9 @@ void timer_start_slow_adcs();
  * value of T/C 1, it is shifted by PWM_STEP_SHIFT as described in pwm.c
  */
 #define PWM_MAX 0x780
+extern volatile unsigned char channels_running;
+#define PWM_IS_ON(n)	(channels_running & (1 << (n)))
+#define TIMER1_IS_ON()	(channels_running)
 void init_pwm();
 void susp_pwm();
 void pwm_off(unsigned char n);
diff --git a/firmware/pwm.c b/firmware/pwm.c
index 512268c..27c8d0d 100644
--- a/firmware/pwm.c
+++ b/firmware/pwm.c
@@ -12,9 +12,11 @@
 #error PWM_TOP too high
 #endif
 
+volatile unsigned char channels_running;
+
 static uint16_t pwm[N_PWMLEDS];
 static volatile unsigned char step;
-static unsigned char channels_running, pll_enabled;
+static unsigned char pll_enabled;
 
 static void enable_pll()
 {