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#include <stdio.h>
#include <avr/pgmspace.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include "delay.h"
#include "morse.h"
#define WORDSPACE (2*DIT_DURATION)
const uint16_t morse_mapping[60] PROGMEM =
{
// Read bits from right to left
0b110101, //+ ASCII 43
0b110101, //, ASCII 44
0b1011110, //- ASCII 45
0b1010101, //., ASCII 46
0b110110, // / ASCII 47
0b100000, // 0, ASCII 48
0b100001, // 1
0b100011,
0b100111,
0b101111,
0b111111,
0b111110,
0b111100,
0b111000,
0b110000, // 9, ASCII 57
// the colon stands in as error
0b111111111, // :
// The following are mostly invalid, but
// required to fill the gap in ASCII between
// numerals and capital letters
0b10, // ;
0b10, // <
0b10, // =
0b10, // >
0b1110011, // ?
0b1101001, //@
0b101, // A ASCII 65
0b11110,
0b11010,
0b1110,
0b11,
0b11011,
0b1100,
0b11111,
0b111,
0b10001,
0b1010,
0b11101,
0b100, //M
0b110,
0b1000,
0b11001,
0b10100,
0b1101,
0b1111,
0b10,
0b1011,
0b10111,
0b1001,
0b10110,
0b10010,
0b11100, // Z
0b101010, //Start, ASCII [
0b1010111, // SK , ASCII '\'
};
void morse_symbol(uint8_t sym)
{
uint8_t p = 0;
uint16_t val = pgm_read_word(&morse_mapping[sym]);
while((val >> p) != 0b1) {
if (((val >> p) & 0b1) == 0b1) {
dit();
}
else {
dah();
}
p++;
}
delay_ms(WORDSPACE);
}
void morse(char* text)
{
char* sym = text;
do {
if (*sym == ' ') {
delay_ms(WORDSPACE);
}
else {
morse_symbol(*sym - '+');
}
sym++;
} while (*sym != '\0');
}
void morse_char(char letter)
{
morse_symbol(letter - '+');
}
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