Created
February 14, 2023 22:33
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| package main | |
| import ( | |
| "machine" | |
| "time" | |
| "unicode" | |
| ) | |
| const ( | |
| unit = time.Millisecond * 200 | |
| ) | |
| var dur = map[rune]time.Duration{ | |
| '.': 1, | |
| '-': 3, | |
| } | |
| // moreseCode is a the [A-Z] subset of the morse code characters, see | |
| // https://en.wikipedia.org/wiki/Morse_code#Letters,_numbers,_punctuation,_prosigns_for_Morse_code_and_non-Latin_variants | |
| var morseCodes = map[rune]string{ | |
| 'A': ".-", | |
| 'B': "-...", | |
| 'C': "-.-.", | |
| 'D': "-..", | |
| 'E': ".", | |
| 'F': "..-.", | |
| 'G': "--.", | |
| 'H': "....", | |
| 'I': "..", | |
| 'J': ".---", | |
| 'K': "-.-", | |
| 'L': ".-..", | |
| 'M': "--", | |
| 'N': "-.", | |
| 'O': "---", | |
| 'P': ".--.", | |
| 'Q': "--.-", | |
| 'R': ".-.", | |
| 'S': "...", | |
| 'T': "-", | |
| 'U': "..-", | |
| 'V': "...-", | |
| 'W': ".--", | |
| 'X': "-..-", | |
| 'Y': "-.--", | |
| 'Z': "--..", | |
| } | |
| func main() { | |
| machine.LED.Configure(machine.PinConfig{Mode: machine.PinOutput}) | |
| input := "hello world" | |
| for _, r := range input { | |
| blinkMorseCode(r) | |
| } | |
| } | |
| // blinkMorseCode translates a character in [a-zA-Z ] to Morse code following the | |
| // International Morse code (https://en.wikipedia.org/wiki/Morse_code#Representation,_timing,_and_speeds): | |
| // | |
| // short mark, dot or dit ( ▄ ): "dit duration" is one time unit long | |
| // long mark, dash or dah ( ▄▄▄ ): three time units long | |
| // inter-element gap between the dits and dahs within a character: one dot duration or one unit long | |
| // short gap (between letters): three time units long | |
| // medium gap (between words): seven time units long | |
| func blinkMorseCode(r rune) { | |
| if unicode.IsSpace(r) { | |
| time.Sleep(4 * unit) // We have already slept 3 units at the end of the last morseCode. | |
| return | |
| } | |
| morseCode := morseCodes[unicode.ToUpper(r)] | |
| for _, r := range morseCode { | |
| machine.LED.High() | |
| time.Sleep(dur[r] * unit) | |
| machine.LED.Low() | |
| time.Sleep(unit) | |
| } | |
| time.Sleep(2 * unit) // We have already slept 1 unit at the end of the last dot/dash. | |
| } |
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