From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Wed, 1 May 2013 20:28:02 +0000 (+0200)
Subject: Make jiffies (timer) about 100 Hz.
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=commitdiff_plain;h=655d773afa02e2589680fa9cefd4302efa2fd2b3;p=tinyboard.git

Make jiffies (timer) about 100 Hz.
---

diff --git a/projects/step-up/adc.c b/projects/step-up/adc.c
index fc4c7ca..cff4527 100644
--- a/projects/step-up/adc.c
+++ b/projects/step-up/adc.c
@@ -12,6 +12,7 @@
 
 volatile static unsigned char current_adc, current_slow_adc;
 static uint16_t adc_sum, read_zero, drop_count, read_count, n_reads_log;
+volatile uint16_t jiffies;
 
 static void setup_mux(unsigned char n)
 {
@@ -146,10 +147,15 @@ static void adc1_gain20_adc(uint16_t adcsum)
 
 static void inline adc_based_timer()
 {
-	static uint16_t pattern_counter;
+	static unsigned char count;
 
-	if (++pattern_counter > 250) {
-		pattern_counter = 0;
+	if (++count < 40) // about 100 Hz jiffies
+		return;
+
+	count = 0;
+	++jiffies;
+
+	if ((jiffies & 0x0007) == 0) {
 		patterns_next_tick();
 	}
 }
diff --git a/projects/step-up/lights.h b/projects/step-up/lights.h
index d409d9d..64fce03 100644
--- a/projects/step-up/lights.h
+++ b/projects/step-up/lights.h
@@ -24,6 +24,7 @@ void inline log_word(uint16_t word) { }
 
 /* adc.c */
 #define PWMLED_ADC_SHIFT 1 /* 1<<1 measurements per single callback */
+extern volatile uint16_t jiffies;
 void init_adc();
 void susp_adc();
 void timer_start_slow_adcs();
@@ -35,11 +36,6 @@ void susp_pwm();
 void pwm_off();
 void pwm_set(uint8_t stride);
 
-/* tmr.c */
-extern volatile uint16_t jiffies;
-void init_tmr();
-void susp_tmr();
-
 /* pwmled.c */
 void init_pwmled();
 void pwmled_adc(uint16_t adcval);