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Raise host frame payload limit so multi-client UART replies fit.

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Use a uint16 LE length and 1024-byte max payload so CLIENT_INFO and BATTERY_STATUS no longer fail encoding past ~10 connected pods.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
skruecken
2026-11-01 23:43:33 +01:00
co-authored by Cursor
parent 73f48c8002
commit 9046677460
11 changed files with 72 additions and 39 deletions
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goTool/uart/frame.go
+21 -11
View File
@@ -10,8 +10,10 @@ import (
const (
StartMarker = 0xAA
StopMarker = 0xCC
// Must match main/uart.h MAX_PAYLOAD_SIZE (MAX_BUF_SIZE - 4).
MaxPayload = 248
// Must match main/uart.h MAX_PAYLOAD_SIZE.
MaxPayload = 1024
// AA | len_lo | len_hi | payload | xor | CC
FrameOverhead = 5
)
var (
@@ -19,14 +21,15 @@ var (
ErrTimeout = errors.New("read timeout")
)
// EncodeFrame builds a framed packet: 0xAA len payload xor(payload) 0xCC.
// EncodeFrame builds a framed packet: 0xAA len_lo len_hi payload xor(payload) 0xCC.
func EncodeFrame(payload []byte) ([]byte, error) {
if len(payload) == 0 || len(payload) > MaxPayload {
return nil, fmt.Errorf("payload length %d out of range 1..%d", len(payload), MaxPayload)
}
frame := make([]byte, 0, 4+len(payload))
frame = append(frame, StartMarker, byte(len(payload)))
n := len(payload)
frame := make([]byte, 0, FrameOverhead+n)
frame = append(frame, StartMarker, byte(n&0xff), byte((n>>8)&0xff))
var checksum byte
for _, b := range payload {
frame = append(frame, b)
@@ -39,6 +42,7 @@ func EncodeFrame(payload []byte) ([]byte, error) {
type Parser struct {
state int
len int
lenLo byte
payload []byte
index int
checksum byte
@@ -46,7 +50,8 @@ type Parser struct {
const (
stateStart = iota
stateLen
stateLenLo
stateLenHi
stateData
stateChecksum
stateStop
@@ -63,14 +68,19 @@ func (p *Parser) Feed(b byte) (payload []byte, ok bool, err error) {
if b == StartMarker {
p.index = 0
p.checksum = 0
p.state = stateLen
p.state = stateLenLo
}
case stateLen:
if b == 0 || b > MaxPayload {
case stateLenLo:
p.lenLo = b
p.state = stateLenHi
case stateLenHi:
n := int(p.lenLo) | (int(b) << 8)
if n == 0 || n > MaxPayload {
p.state = stateStart
} else {
p.len = int(b)
p.len = n
p.payload = make([]byte, p.len)
p.index = 0
p.state = stateData
}
case stateData:
@@ -102,7 +112,7 @@ func (p *Parser) Feed(b byte) (payload []byte, ok bool, err error) {
// maxWait bounds total wait time; zero means no limit (serial read timeouts retry forever).
func ReadFrame(r io.Reader, buf []byte, maxWait time.Duration) ([]byte, error) {
if buf == nil {
buf = make([]byte, 256)
buf = make([]byte, 1024)
}
parser := NewParser()