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SLIP bug: reading too fast from serial

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when the escape char was read from serial, then the escaped char was
read immediately after, but it was not available, thus resulting in
no proper escape; now fixed
This commit is contained in:
giomba 2019-12-23 21:45:25 +01:00
parent aa4a347bfb
commit 895206a046
1 changed files with 3 additions and 2 deletions
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5
slip.ino
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@ -3,7 +3,7 @@ namespace slip {
void send(const char* buffer, int len) { void send(const char* buffer, int len) {
// Serial.write(END); /* frame-out any possible noise on the line */ // Serial.write(END); /* frame-out any possible noise on the line */
for (uint8_t i = 0; i < len; ++i) { for (int i = 0; i < len; ++i) {
switch (buffer[i]) { switch (buffer[i]) {
case END: case END:
Serial.write(ESC); Serial.write(ESC);
@ -24,7 +24,7 @@ namespace slip {
int recv(char* buffer, int len) { int recv(char* buffer, int len) {
char r; char r;
uint8_t i = 0; int i = 0;
while (i < len) { while (i < len) {
if (Serial.available()) { if (Serial.available()) {
@ -32,6 +32,7 @@ namespace slip {
switch (r) { switch (r) {
case ESC: case ESC:
while (Serial.available() <= 0);
r = Serial.read(); r = Serial.read();
if (r == ESC_END) { if (r == ESC_END) {
buffer[i++] = END; buffer[i++] = END;