From 8e42ca09787ab7698a068df71e37f388ca1b2e9f Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.de>
Date: Mon, 2 Oct 2023 14:50:03 +0200
Subject: Transmission works including sync and whitening

---
 center_fw/src/main.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

(limited to 'center_fw/src')

diff --git a/center_fw/src/main.c b/center_fw/src/main.c
index a4f7d9e..68a787f 100644
--- a/center_fw/src/main.c
+++ b/center_fw/src/main.c
@@ -155,11 +155,15 @@ int main(void) {
         if (packet_received) {
             if (rng_reset) {
                 packet_rng_state = xorshift32(1);
+                rng_reset = false;
+                GPIOB->BSRR = (1<<7);
+            } else {
+                GPIOB->BRR = (1<<7);
             }
 
             for(size_t i=0; i<sizeof(rx_buf.packet); i++) {
                 packet_rng_state = xorshift32(packet_rng_state);
-                // rx_buf.bytes[i] ^= packet_rng_state; FIXME DEBUG
+                rx_buf.bytes[i] ^= packet_rng_state;
             }
 
             uint32_t crc_state = crc32_reset();
@@ -169,6 +173,7 @@ int main(void) {
             crc_state = crc32_finalize(crc_state);
 
             if (crc_state == rx_buf.packet.crc) {
+                GPIOA->BSRR = (1<<6);
                 /* good packet received */
                 int val = rx_buf.packet.brightness[CONFIG_MODULE_ADDRESS/2];
                 if (CONFIG_MODULE_ADDRESS & 1) {
@@ -178,6 +183,7 @@ int main(void) {
                 channel_mask = rx_buf.packet.channels[CONFIG_MODULE_ADDRESS];
 
             } else {
+                GPIOA->BRR = (1<<6);
                 errors.crc_errors++;
             }
 
@@ -203,7 +209,6 @@ void gdb_dump(void) {
 void ADC1_IRQHandler(void) {
     static int phase = 0;
     static int last_bit = 0;
-    GPIOB->BSRR = (1<<7);
 
     /* Read sample and apply threshold */
     int sample = ADC1->DR; /* resets the EOC interrupt flag */
@@ -300,11 +305,9 @@ void ADC1_IRQHandler(void) {
     if (phase == SAMPLES_PER_BAUD - LED_DEAD_TIME || bit != last_bit || bit_margin < MIN_RECTIFIER_MARGIN) { /* reset */
         GPIOA->BRR = (1<<11); /* RECT1 */
         GPIOC->BRR = (1<<15); /* RECT2 */
-        GPIOA->BRR = (1<<6);
 
     } else if (phase == LED_DEAD_TIME) { /* set */
         if (bit) {
-            GPIOA->BSRR = (1<<6);
 #ifndef DEBUG_DISABLE_DRIVERS
             GPIOC->BSRR = (1<<15); /* RECT2 */
 #endif
@@ -329,7 +332,6 @@ void ADC1_IRQHandler(void) {
     }
 
     last_bit = bit;
-    GPIOB->BRR = (1<<7);
 }
 
 void TIM14_IRQHandler(void) {
-- 
cgit