57 lines
1.1 KiB
C++
57 lines
1.1 KiB
C++
namespace slip {
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void send(const char* buffer, int len) {
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// Serial.write(END); /* frame-out any possible noise on the line */
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for (int i = 0; i < len; ++i) {
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switch (buffer[i]) {
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case END:
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Serial.write(ESC);
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Serial.write(ESC_END);
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break;
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case ESC:
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Serial.write(ESC);
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Serial.write(ESC_ESC);
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break;
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default:
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Serial.write(buffer[i]);
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break;
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}
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}
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Serial.write(END);
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}
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int recv(char* buffer, int len) {
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char r;
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int i = 0;
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while (i < len) {
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if (Serial.available()) {
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r = Serial.read();
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switch (r) {
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case ESC:
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while (Serial.available() <= 0);
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r = Serial.read();
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if (r == ESC_END) {
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buffer[i++] = END;
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} else if (r == ESC_ESC) {
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buffer[i++] = ESC;
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}
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break;
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case END:
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return i;
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break;
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default:
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buffer[i++] = r;
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break;
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}
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}
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}
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return i;
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}
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} /* namespace slip */
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