add morse code output
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4bdc673561
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f621403d8f
138
main.c
138
main.c
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@ -250,6 +250,118 @@ static void mux_select(uint8_t output)
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}
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}
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/** unit Morse code duration in frames */
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#define MORSE_DOT 10
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uint8_t morse[1*4*5*2] = {0};
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uint8_t morse_i = 0;
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static void encode_morse(void)
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{
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bool not_zero = false;
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for (uint8_t digit=0; digit<4; digit++) {
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uint16_t number = 40;
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for (uint8_t divide=digit; divide<3; divide++) {
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number /= 10;
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}
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number %= 10;
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printf("%u: %u\n", digit, number);
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// remember when we found the first non-zero digit
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if (number!=0 || digit==3) {
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not_zero = true;
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}
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// encode the number in Morse code (1=short, 3=long)
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switch (number) {
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case 1:
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morse[digit*2*5+0] = 1*MORSE_DOT;
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morse[digit*2*5+2] = 3*MORSE_DOT;
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morse[digit*2*5+4] = 3*MORSE_DOT;
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morse[digit*2*5+6] = 3*MORSE_DOT;
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morse[digit*2*5+8] = 3*MORSE_DOT;
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break;
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case 2:
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morse[digit*2*5+0] = 1*MORSE_DOT;
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morse[digit*2*5+2] = 1*MORSE_DOT;
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morse[digit*2*5+4] = 3*MORSE_DOT;
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morse[digit*2*5+6] = 3*MORSE_DOT;
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morse[digit*2*5+8] = 3*MORSE_DOT;
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break;
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case 3:
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morse[digit*2*5+0] = 1*MORSE_DOT;
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morse[digit*2*5+2] = 1*MORSE_DOT;
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morse[digit*2*5+4] = 1*MORSE_DOT;
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morse[digit*2*5+6] = 3*MORSE_DOT;
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morse[digit*2*5+8] = 3*MORSE_DOT;
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break;
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case 4:
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morse[digit*2*5+0] = 1*MORSE_DOT;
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morse[digit*2*5+2] = 1*MORSE_DOT;
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morse[digit*2*5+4] = 1*MORSE_DOT;
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morse[digit*2*5+6] = 1*MORSE_DOT;
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morse[digit*2*5+8] = 3*MORSE_DOT;
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break;
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case 5:
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morse[digit*2*5+0] = 1*MORSE_DOT;
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morse[digit*2*5+2] = 1*MORSE_DOT;
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morse[digit*2*5+4] = 1*MORSE_DOT;
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morse[digit*2*5+6] = 1*MORSE_DOT;
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morse[digit*2*5+8] = 1*MORSE_DOT;
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break;
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case 6:
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morse[digit*2*5+0] = 3*MORSE_DOT;
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morse[digit*2*5+2] = 1*MORSE_DOT;
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morse[digit*2*5+4] = 1*MORSE_DOT;
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morse[digit*2*5+6] = 1*MORSE_DOT;
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morse[digit*2*5+8] = 1*MORSE_DOT;
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break;
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case 7:
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morse[digit*2*5+0] = 3*MORSE_DOT;
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morse[digit*2*5+2] = 3*MORSE_DOT;
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morse[digit*2*5+4] = 1*MORSE_DOT;
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morse[digit*2*5+6] = 1*MORSE_DOT;
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morse[digit*2*5+8] = 1*MORSE_DOT;
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break;
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case 8:
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morse[digit*2*5+0] = 3*MORSE_DOT;
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morse[digit*2*5+2] = 3*MORSE_DOT;
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morse[digit*2*5+4] = 3*MORSE_DOT;
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morse[digit*2*5+6] = 1*MORSE_DOT;
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morse[digit*2*5+8] = 1*MORSE_DOT;
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break;
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case 9:
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morse[digit*2*5+0] = 3*MORSE_DOT;
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morse[digit*2*5+2] = 3*MORSE_DOT;
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morse[digit*2*5+4] = 3*MORSE_DOT;
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morse[digit*2*5+6] = 3*MORSE_DOT;
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morse[digit*2*5+8] = 1*MORSE_DOT;
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break;
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case 0:
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if (not_zero) {
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morse[digit*2*5+0] = 3*MORSE_DOT;
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morse[digit*2*5+2] = 3*MORSE_DOT;
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morse[digit*2*5+4] = 3*MORSE_DOT;
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morse[digit*2*5+6] = 3*MORSE_DOT;
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morse[digit*2*5+8] = 3*MORSE_DOT;
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} else { //don't encode the first digits if they are zero
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morse[digit*2*5+0] = 0;
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morse[digit*2*5+2] = 0;
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morse[digit*2*5+4] = 0;
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morse[digit*2*5+6] = 0;
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morse[digit*2*5+8] = 0;
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}
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break;
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}
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// fill the spaces between the dots
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for (uint8_t space=0; space<5; space++) {
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if (0==morse[digit*2*5+space*2]) {
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morse[digit*2*5+space*2+1] = 0;
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} else {
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morse[digit*2*5+space*2+1] = 1*MORSE_DOT;
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}
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}
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}
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morse_i = 0; // reset Morse index
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}
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/** program entry point
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* this is the firmware function started by the micro-controller
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*/
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@ -422,6 +534,9 @@ void main(void)
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timer_generate_event(TIM(BUZZER_TIMER), TIM_EGR_UG); // generate update event to reload registers and reset counter
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printf("OK\n");
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encode_morse();
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bool announce = true;
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// main loop
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printf("command input: ready\n");
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bool action = false; // if an action has been performed don't go to sleep
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@ -462,6 +577,24 @@ void main(void)
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while (frame_flag) { // a frame has passed
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frame_flag = false; // reset flag
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action = true; // action has been performed
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if (announce) { // announce the scene and take using Morse code over the buzzer
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while (morse_i<LENGTH(morse)) {
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if (morse[morse_i]) { // skip empty codes
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if (morse_i%2) { // switch buzzer on for odd code
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timer_disable_counter(TIM(BUZZER_TIMER)); // stop buzzing
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} else {
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timer_enable_counter(TIM(BUZZER_TIMER)); // start buzzing
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}
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morse[morse_i]--; // decrement beeping
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break; // buzz for one frame
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} else {
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morse_i++; // got to next code
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}
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}
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if (morse_i>=LENGTH(morse)) { // all codes done
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announce = false; // announce finished
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}
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}
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char time[] = "00000000"; // time to display
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time[0] += (rtc_ds1307_time[2]/10)%10; // display hours
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time[1] += (rtc_ds1307_time[2])%10; // display hours
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@ -484,11 +617,6 @@ void main(void)
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rtc_tick_flag = false; // reset flag
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action = true; // action has been performed
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led_toggle(); // toggle LED (good to indicate if main function is stuck)
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if (rtc_seconds%2) {
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timer_enable_counter(TIM(BUZZER_TIMER)); // start buzzing
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} else {
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timer_disable_counter(TIM(BUZZER_TIMER)); // start buzzing
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}
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if (standby_timer>=STANDBY_TIMEOUT) { // standby timeout complete
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// go into standby mode
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printf("shutting down\n");
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