From c059d9172fdfa18ef5b2c49aa6433ad22db858fc Mon Sep 17 00:00:00 2001
From: Stephen D <webmaster@scd31.com>
Date: Sat, 3 Jun 2023 11:12:51 -0300
Subject: [PATCH] tx garbage at the start of a packet burst to give the AGC
time to calibrate
---
src/main.rs | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/src/main.rs b/src/main.rs
index 475c065..3409546 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -23,6 +23,7 @@ mod app {
use ringbuffer::{ConstGenericRingBuffer, RingBuffer, RingBufferRead, RingBufferWrite};
use crate::packet::Packet;
+ use crate::packet::PACKET_LEN;
// in # packets
const BUFFER_LEN: usize = 50;
@@ -139,14 +140,28 @@ mod app {
#[idle(local=[radio], shared=[tx_buf, radio_temp])]
fn idle(mut ctx: idle::Context) -> ! {
let mut i = 0;
+ let mut iterations_since_last_packet = 0;
loop {
if let Some(mut pkt) = ctx.shared.tx_buf.lock(|buf| buf.dequeue()) {
+ if iterations_since_last_packet >= 1000 {
+ // if we haven't transmitted in a while, the receiver's AGC is going to be messed up
+ // send 5 packets just so it can calibrate before we actually send it
+ for _ in 0..5 {
+ const GARBAGE: [u8; PACKET_LEN] = [0x00; PACKET_LEN];
+ ctx.local.radio.tx(&mut GARBAGE.clone()).unwrap();
+ }
+ }
+
ctx.local.radio.tx(&mut pkt.data).unwrap();
+
+ iterations_since_last_packet = 0;
+ } else {
+ iterations_since_last_packet += 1;
}
i += 1;
- // get temp every 500 packets, or whenever when idle TODO
+ // get temp every 500 packets, or whenever when idle
if i >= 500 {
i = 0;
--
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