From 7b7b18cb148adf6a254a1f73b7fd32d68d88681c Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.de>
Date: Sat, 23 Dec 2023 16:51:26 +0100
Subject: Try to de-flicker transmission scheduling

---
 driver_fw/src/main.c | 33 +++++++++++----------------------
 1 file changed, 11 insertions(+), 22 deletions(-)

diff --git a/driver_fw/src/main.c b/driver_fw/src/main.c
index 866cde5..4502784 100644
--- a/driver_fw/src/main.c
+++ b/driver_fw/src/main.c
@@ -17,7 +17,6 @@ static void dma_tx_waveform(size_t table_size, const uint16_t *table);
 
 #define SYNC_INTERVAL 13
 
-static size_t time_to_sync = 0;
 static size_t tx_bitpos = 0;
 static size_t tx_sympos = 0;
 static int tx_last_bit = 0;
@@ -315,7 +314,6 @@ size_t cnd_pos = 0;
 void DMA1_Channel1_IRQHandler() {
     static int transfer_errors = 0;
     static int current_symbol = 0;
-    static int idle_symbol = 0;
 
     if (DMA1->ISR & DMA_ISR_TEIF1) {
         transfer_errors ++;
@@ -344,32 +342,23 @@ void DMA1_Channel1_IRQHandler() {
 
         sym_arr[sym_pos] = -255;
 
-        idle_symbol++;
-        if (idle_symbol == 3) {
-            current_symbol = xfr_8b10b_encode(&encoder_state_8b10b, -K23_7);
-            idle_symbol = 0;
-
-        } else if (tx_sympos == sizeof(struct data_packet)) {
-            if (time_to_sync > 0) {
-                current_symbol = xfr_8b10b_encode(&encoder_state_8b10b, -K27_7);
-                sym_arr[sym_pos] = current_symbol;
-                time_to_sync--;
-
-            } else { 
-                current_symbol = xfr_8b10b_encode(&encoder_state_8b10b, -K28_1);
-                sym_arr[sym_pos] = current_symbol;
-                packet_rng_state = xorshift32(1);
-                time_to_sync = SYNC_INTERVAL;
-            }
-
+        if (tx_sympos == sizeof(struct data_packet)) {
             if (idle_buf_ready) {
                 union tx_buf_union *tmp = tx_buf_idle;
                 tx_buf_idle = tx_buf_read;
                 tx_buf_read = tmp;
                 idle_buf_ready = false;
-            }
 
-            tx_sympos = 0;
+                current_symbol = xfr_8b10b_encode(&encoder_state_8b10b, -K28_1);
+                sym_arr[sym_pos] = current_symbol;
+                packet_rng_state = xorshift32(1);
+
+                tx_sympos = 0;
+
+            } else {
+                current_symbol = xfr_8b10b_encode(&encoder_state_8b10b, -K23_7);
+                sym_arr[sym_pos] = current_symbol;
+            }
 
         } else {
             uint8_t b = tx_buf_read->bytes[tx_sympos];
-- 
cgit