Experiment with OOK
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parent
68ca4f14f4
commit
2732df5bc3
40
src/main.c
40
src/main.c
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@ -847,6 +847,7 @@ static void command(const char *cmd)
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puts("brx N FREQ - receive on pin N, binary output");
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puts("brx N FREQ - receive on pin N, binary output");
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puts("bpsk N FREQ - transmit on pin N with BPSK");
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puts("bpsk N FREQ - transmit on pin N with BPSK");
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puts("fsk N FREQ - transmit on pin N with FSK");
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puts("fsk N FREQ - transmit on pin N with FSK");
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puts("ook N FREQ - transmit on pin N with OOK");
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puts("sweep N F G S - sweep from F to G with given step");
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puts("sweep N F G S - sweep from F to G with given step");
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puts("noise N - transmit random noise");
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puts("noise N - transmit random noise");
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return;
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return;
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@ -970,6 +971,45 @@ static void command(const char *cmd)
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return;
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return;
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}
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}
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if (3 == sscanf(cmd, " ook %i %f %[\a]", &n, &f, tmp)) {
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float actual = rx_lo_init(f);
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printf("Frequency: %.0f\n", actual);
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rf_tx_start(n);
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puts("Transmitting, press ENTER to stop.");
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bool off = false;
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const double step_hz = (double)CLK_SYS_HZ / (LO_WORDS * 32);
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while (true) {
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int c = getchar_timeout_us(10000);
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if ('\r' == c) {
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break;
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} else if (' ' == c) {
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off = !off;
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gpio_set_oeover(n, off * 2);
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} else if ('+' == c) {
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actual = rx_lo_init(actual + step_hz);
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printf("Frequency: %.0f\n", actual);
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} else if ('-' == c) {
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actual = rx_lo_init(actual - step_hz);
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printf("Frequency: %.0f\n", actual);
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} else if ((c >= '1') && (c <= '9')) {
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for (int i = 0; i < 1000; i++) {
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off = !off;
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gpio_set_oeover(n, off * 2);
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sleep_us(1000 / (c - '0'));
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}
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}
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}
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rf_tx_stop();
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gpio_set_oeover(n, 0);
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puts("Done.");
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return;
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}
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if (5 == sscanf(cmd, " sweep %i %f %f %i %[\a]", &n, &f, &g, &x, tmp)) {
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if (5 == sscanf(cmd, " sweep %i %f %f %i %[\a]", &n, &f, &g, &x, tmp)) {
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const float step_hz = (float)CLK_SYS_HZ / (LO_WORDS * 32);
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const float step_hz = (float)CLK_SYS_HZ / (LO_WORDS * 32);
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const float start = roundf(f / step_hz) * step_hz;
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const float start = roundf(f / step_hz) * step_hz;
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