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jsut minor changes, UNTESTED DMA TIMER CHANGE

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Priec
2025-11-20 13:28:09 +01:00
parent 179bec6ed6
commit 685067a75f
5 changed files with 21 additions and 26 deletions
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18
semestralka_1_connected/src/software_uart/uart_emulation.rs
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@@ -115,7 +115,7 @@ pub fn decode_uart_samples(
let frame_bits = 1 + nbits + parity_bits + stop_bits_count;
let frame_len = frame_bits * ovs;
// Helper: Majority vote over 3 samples centered at `i`
// Majority vote over 3 samples centered at `i`
let get_bit = |i: usize| -> u8 {
let mut votes = 0;
// Check i-1, i, i+1. Saturating sub/add handles boundaries roughly.
@@ -136,7 +136,7 @@ pub fn decode_uart_samples(
}
};
// We loop while we have enough remaining samples for a full frame
// Loop while we have enough remaining samples for a full frame
while idx + frame_len <= samples.len() {
// Wait for falling edge (High -> Low)
// samples[idx] == 1 (Idle/Stop) && samples[idx+1] == 0 (Start)
@@ -146,7 +146,7 @@ pub fn decode_uart_samples(
let center_offset = 1 + (ovs / 2);
let mut scan_idx = idx + center_offset;
// 1. Validate Start Bit (Must be 0)
// Validate Start Bit
if get_bit(scan_idx) != 0 {
idx += 1; // False start (noise), move on
continue;
@@ -155,7 +155,7 @@ pub fn decode_uart_samples(
// Move to center of first data bit
scan_idx += ovs;
// 2. Read Data Bits
// Read Data Bits
let mut data: u8 = 0;
for bit in 0..nbits {
if get_bit(scan_idx) == 1 {
@@ -164,22 +164,22 @@ pub fn decode_uart_samples(
scan_idx += ovs;
}
// 3. Skip Parity (if any)
// Skip Parity
if cfg.parity != Parity::None {
scan_idx += ovs;
}
// 4. Validate Stop Bit (Must be 1)
// Validate Stop Bit (Must be 1)
// If stop bit is 0, it's a framing error. We reject the whole byte.
if get_bit(scan_idx) == 0 {
idx += 1; // Try to find a real start bit on the next sample
idx += 1; // Next sample
continue;
}
// 5. Byte is valid
// Byte is valid
let _ = out.push(data);
// 6. Active Resync: Fast-forward through the stop bit(s) and idle time
// Active Resync: Fast-forward through the stop bit(s) and idle time
// scan_idx is currently at the center of the Stop bit.
idx = scan_idx;
// Advance while we are reading High (1).