diff options
Diffstat (limited to 'src/main.c')
| -rw-r--r-- | src/main.c | 41 |
1 files changed, 29 insertions, 12 deletions
@@ -14,7 +14,7 @@ // 'C' source line config statements // CONFIG1H -#pragma config FOSC = INTIO7 // Oscillator Selection bits (Internal oscillator block) +#pragma config FOSC = INTIO67 // Oscillator Selection bits (Internal oscillator block) #pragma config PLLCFG = ON // 4X PLL Enable (Oscillator multiplied by 4) #pragma config PRICLKEN = ON // Primary clock enable bit (Primary clock is always enabled) #pragma config FCMEN = OFF // Fail-Safe Clock Monitor Enable bit (Fail-Safe Clock Monitor disabled) @@ -26,7 +26,7 @@ #pragma config BORV = 190 // Brown Out Reset Voltage bits (VBOR set to 1.90 V nominal) // CONFIG2H -#pragma config WDTEN = ON // Watchdog Timer Enable bits (WDT is always enabled. SWDTEN bit has no effect) +#pragma config WDTEN = OFF // Watchdog Timer Enable bits (WDT is always enabled. SWDTEN bit has no effect) #pragma config WDTPS = 32768 // Watchdog Timer Postscale Select bits (1:32768) // CONFIG3H @@ -93,13 +93,16 @@ #define NOTES 16 -#define MIDI_CHANNEL 0x0 -#define MIDI_SCALE_START 0x34 // note C3, C4 is 0x3C -#define MIDI_NOTE_SPEED 0x0F // max is 0x7F +// note: when selecting an instrument, subtract 1 (1 - 128 => 0 - 127) +// see https://www.midi.org/specifications/item/gm-level-1-sound-set +#define MIDI_INSTRUMENT 9 +// note: when selecting a channel, subtract 1 (1 - 128 => 0 - 127) +#define MIDI_CHANNEL 0 +#define MIDI_NOTE_SPEED 127 // max is 0x7F -#define DEBUG +//#define DEBUG /* global variables */ @@ -115,11 +118,14 @@ interrupt void isr(void) { unsigned char i, data_a, data_b; +#ifdef DEBUG PORTDbits.RD3 = 0; +#endif if (PIR1bits.TMR2IF) { data_a = PORTA; data_b = PORTB; + i = 7; do { // read the data and append it at the end of keys_data[i] @@ -143,8 +149,10 @@ interrupt void isr(void) // reset interrupt flag PIR1bits.TMR2IF = 0; } - + +#ifdef DEBUG PORTDbits.RD3 = 1; +#endif } /* hardware configuration (inlined) */ @@ -216,7 +224,7 @@ inline void init_hw(void) void main(void) { unsigned i; - midi_message_t message; + midi_message_t conf_message, message; /* setup hardware */ init_hw(); @@ -229,8 +237,17 @@ void main(void) #ifdef DEBUG PORTDbits.RD1 = 0; #endif + + /* midi device configuration */ + conf_message.status = PROGRAM_CHANGE; + conf_message.channel = MIDI_CHANNEL; + conf_message.data[0] = MIDI_INSTRUMENT; + conf_message.data_size = 1; + + midi_note_on(&message, MIDI_CHANNEL, midi_notes_steps_table[0], MIDI_NOTE_SPEED); - midi_note_on(&message, MIDI_CHANNEL, MIDI_SCALE_START, MIDI_NOTE_SPEED); + __delay_ms(500); + eusart_write_midi(&conf_message); /* main loop */ while (1) { @@ -239,9 +256,9 @@ void main(void) if (keypresses & (1<<i)) { // dirty hack to avoid the slow call stack, correct version commented below - message.data[0] = MIDI_SCALE_START + i; - // midi_note_on(&message, MIDI_CHANNEL, MIDI_SCALE_START + i, 0x7F); - + message.data[0] = midi_notes_steps_table[i]; + //midi_note_on(&message, MIDI_CHANNEL, MIDI_SCALE_START + i, MIDI_NOTE_SPEED); + eusart_write_midi(&message); // wait for the minimum note length |