From 63ca975f6f54d86116715a43c05244636037fb00 Mon Sep 17 00:00:00 2001
From: Maciej Bowszys <maciek@makemore.cloud>
Date: Tue, 9 Dec 2025 21:54:25 +0100
Subject: [PATCH] 251209_main_test

---
 recv/pixmod_recv_1v0/main.c | 121 ++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)

diff --git a/recv/pixmod_recv_1v0/main.c b/recv/pixmod_recv_1v0/main.c
index f9b8416..e2982b0 100644
--- a/recv/pixmod_recv_1v0/main.c
+++ b/recv/pixmod_recv_1v0/main.c
@@ -154,3 +154,124 @@ int uart_putchar(char c, FILE *stream) {
 
 
 
+uint16_t tim1_ic_val = 0;
+char tim1_ic_flag = 0;
+
+uint16_t read_chained_timer(void) {
+    uint8_t sreg = SREG;
+    cli();
+    
+    uint8_t high_byte = TCNT0;
+    uint8_t low_byte = TCNT1;
+    
+    SREG = sreg;
+    sei();
+    
+    return ((uint16_t)high_byte << 8) | low_byte;
+}
+
+ISR(TIMER1_OVF_vect) {
+    TCNT0++; 
+}
+
+ISR(PCINT0_vect) {
+    if(!(PINB & (1 << PULSE_IN_PIN))){ // pulsein pin is low
+        TCNT0 = 0x00; // reset tim0
+        TCNT1 = 0x00; // reset tim1
+    }else{ // pulsein pin is high
+        tim1_ic_val = read_chained_timer(); 
+        tim1_ic_flag = 1;
+        //GIFR |= (1 << PCIF); // Clear the PCINT Flag (PCIF) after processing the interrupt
+    }
+}
+
+
+
+int main() {
+    int d = 0;
+    int code = 0;
+
+    DDRB &= ~(1 << PULSE_IN_PIN); // set to input
+    // PORTB |= (1 << PULSE_IN_PIN); // enable pullup
+    PCMSK |= (1 << PCINT4); // enable pin change interrupt 4
+    GIMSK |= (1 << PCIE); // enable pin change interrupts
+
+    //TCCR1B |= (1 << CS10); // clk/1 prescaler
+    TCNT1 = 0x00; // reset tim1
+    TCCR1 &= ~((1 << CS13) | (1 << CS12) | (1 << CS11) | (1 << CS10)); // clear prescalers - stop tim1
+    TCCR1 |= (1 << CS12); // CS12 high for clk/8 prescaler
+    //TCCR1 |= (1 << CS11) | (1 << CS10);
+    TIMSK |= (1 << TOIE1); // enable tim1 overflow int
+
+    TCCR0B = 0x00; // clear prescalers to stop tim0
+    TCNT0 = 0x00; 
+    
+    sei(); // enable int
+
+
+    //if(SERIAL_OUT){
+        uart_init();
+        _delay_ms(500);
+    //}else{
+        // Initialize I/O: Set the NeoPixel pin as an output
+        DDRB |= (1 << NEOPIXEL_PIN);
+    //}
+
+
+
+    //if(SERIAL_OUT){
+        printf("starting..\n");
+    //}else{
+        //setPixelColor(0, 0, 255, 0);
+        ws2812_send();
+    //}
+
+    while(1){
+        if(tim1_ic_flag){
+            //if(SERIAL_OUT){
+                //printf("%d\n", (int)tim1_ic_val);
+            //}
+
+            if(tim1_ic_val >= 400){
+                if(tim1_ic_val > 2000){
+                    //if(SERIAL_OUT){
+                        printf(" %d\n", code);
+                    //}
+
+                    if(code == 7774){
+                        //if(SERIAL_OUT){
+                            printf("+\n");
+                        //}else{
+                            setPixelColor(1, 0, 255, 0);
+                            ws2812_send();
+                        //}
+                    }else if(code == 15964){
+                        //if(SERIAL_OUT){
+                            printf("-\n");
+                        //}else{
+                            setPixelColor(1, 255, 0, 0);
+                            ws2812_send();
+                        //}
+                    }
+
+                    code = 0;
+                }else if(tim1_ic_val > 605){
+                    //if(SERIAL_OUT){
+                        printf("1");
+                    //}
+                    ++code;
+                }else{
+                    //if(SERIAL_OUT){
+                        printf("0");
+                    //}
+                }
+                code *=2;
+            }
+
+            tim1_ic_flag = 0;
+        }
+        _delay_us(10);
+    }
+
+    return 0;
+}