From ba40f96d4482eda6623800322bd366b46f11187b Mon Sep 17 00:00:00 2001
From: Allen Hill <allenofthehills@gmail.com>
Date: Sun, 3 Sep 2023 19:32:09 -0400
Subject: [PATCH] Change sendbit timer config to optimize function length
 (insns)

---
 src/avclandrv.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/avclandrv.c b/src/avclandrv.c
index 67bfdee..f0e8766 100644
--- a/src/avclandrv.c
+++ b/src/avclandrv.c
@@ -191,10 +191,9 @@ void AVCLAN_init() {
   PORTB.DIRSET = PIN2_bm;                     // Enable AC2 OUT for LED
   PORTB.PIN2CTRL = PORT_ISC_INPUT_DISABLE_gc; // Output only
 
-  TCB1.CTRLB = TCB_ASYNC_bm | TCB_CNTMODE_SINGLE_gc;
-  TCB1.EVCTRL = TCB_CAPTEI_bm;
-  TCB1.INTCTRL = TCB_CAPT_bm;
-  EVSYS.ASYNCUSER0 = EVSYS_ASYNCUSER0_ASYNCCH0_gc;
+  // TCB1 for send bit timing
+  TCB1.CTRLB = TCB_CNTMODE_INT_gc;
+  TCB1.CCMP = 0xFFFF;
   TCB1.CTRLA = TCB_CLKSEL_CLKDIV2_gc | TCB_ENABLE_bm;
 
   answerReq = cm_Null;
@@ -225,15 +224,15 @@ uint8_t AVCLan_Read_Byte(uint8_t length, uint8_t *parity) {
 }
 
 void set_AVC_logic_for(uint8_t val, uint16_t period) {
-  if (val == 1) {
+  TCB1.CNT = 0;
+  if (val) {
     AVC_SET_LOGICAL_1();
   } else {
     AVC_SET_LOGICAL_0();
   }
-  TCB1.CCMP = period;
-  EVSYS.ASYNCSTROBE = EVSYS_ASYNCCH0_0_bm;
-  loop_until_bit_is_set(TCB1_INTFLAGS, 0);
-  TCB1_INTFLAGS = 1;
+  while (TCB1.CNT <= period) {};
+
+  return;
 }
 
 uint8_t AVCLan_Send_StartBit() {