X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=tinyboard.git;a=blobdiff_plain;f=projects%2Fstep-up%2Fadc.c;h=cff4527037c0bfe052a6304caeb9a422da9fd1c3;hp=fc4c7caac3a201b3526c2f5a4908aabc24c5f67b;hb=655d773afa02e2589680fa9cefd4302efa2fd2b3;hpb=37d45fd92b03b610195d7d6227140672ccc17b2b

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();
 	}
 }