Make jiffies (timer) about 100 Hz.

[tinyboard.git] / projects / step-up / adc.c

diff --git a/projects/step-up/adc.c b/projects/step-up/adc.c
index fc4c7caac3a201b3526c2f5a4908aabc24c5f67b..cff4527037c0bfe052a6304caeb9a422da9fd1c3 100644 (file)
--- 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();
        }
 }