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authorjaseg <git@jaseg.de>2023-09-30 18:25:10 +0200
committerjaseg <git@jaseg.de>2023-09-30 18:25:10 +0200
commit67e30fa91e12b452c1a18f6c5eb8a33cdb9ec625 (patch)
tree583a3e944cb266248a6011d33bebe58cc55ee23c /center_fw/src
parentee1d1bd0c2c944643596af85b935a128db847117 (diff)
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8b/10b tx/rx works
Diffstat (limited to 'center_fw/src')
-rw-r--r--center_fw/src/main.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/center_fw/src/main.c b/center_fw/src/main.c
index 53b6aae..274abad 100644
--- a/center_fw/src/main.c
+++ b/center_fw/src/main.c
@@ -124,7 +124,7 @@ void TIM1_CC_IRQHandler(void) {
}
*/
static size_t received_symbols = 0;
-static int symbol_buf[32];
+static int symbol_buf[64];
static size_t received_bits = 0;
static int16_t bit_buf[256];
size_t adc_reduced_pos = 0;
@@ -145,16 +145,13 @@ void DMA1_Channel1_IRQHandler(void) {
int sample = buf[i];
adc_reduced[adc_reduced_pos] = (sample & 0xffff)>>9;
- if (adc_reduced_pos == 0) {
- asm volatile ("bkpt");
- }
if ((last_sample <= threshold_adc_counts && sample >= threshold_adc_counts) ||
(last_sample >= threshold_adc_counts && sample <= threshold_adc_counts)){
sampling_phase = sample_per_baud / 4; /* /2 for half baud sampling point, /2 for sinusoidal edge shape */
} else if (sampling_phase == 0) {
- int bit = sample < threshold_adc_counts;
+ int bit = sample > threshold_adc_counts;
adc_reduced[adc_reduced_pos] |= 0x80;
bit_buf[received_bits] = bit;
@@ -171,7 +168,10 @@ void DMA1_Channel1_IRQHandler(void) {
sampling_phase--;
}
- adc_reduced_pos = (adc_reduced_pos+1) % COUNT_OF(adc_reduced);
+ adc_reduced_pos++;
+ if (adc_reduced_pos == COUNT_OF(adc_reduced)) {
+ adc_reduced_pos =0;
+ }
last_sample = sample;
}