-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.c
532 lines (456 loc) · 16.1 KB
/
main.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
// Roberto Benjami : MIDI <-> USB átalakíto
// Compiler: Microchip C18
#include <p18cxxx.h>
#include "USB\usb.h"
#include "usb_config.h"
#include "usb_function_midi.h"
#include "hardwareprofile.h"
#include "bootloaders.h"
#include "uart.h"
#include "multitimer.h"
#define CABLENUM 0
#pragma udata USB_VARIABLES = USBBUFFERADDR
unsigned char UsbRecBuffer1[64]; // USB -> MIDI
unsigned char UsbRecBuffer2[64]; // USB -> MIDI
USB_AUDIO_MIDI_EVENT_PACKET MidiData; // 4 bájtos tömb (csatorna üzeneteknek)
USB_AUDIO_MIDI_EVENT_PACKET CommonMidiData;// 4 bájtos tömb (rendszerüzeneteknek)
#pragma udata
// unsigned char MidiRecBuffer[64]; // USB -> MIDI csomag másolat
USB_HANDLE USBTxHandle = 0;
USB_HANDLE USBRxHandle = 0;
USB_VOLATILE BYTE msCounter;
volatile unsigned char ActSenzTime = 0;
#ifdef __18F14K50_H
rom char progID[] = {"USB-Midi Interface PIC18F14K50 (by Roberto Benjami v2016.01.16)"};
#endif
#ifdef __18F2550_H
rom char progID[] = {"USB-Midi Interface PIC18F2550 (by Roberto Benjami v2016.01.16)"};
#endif
/** PRIVATE PROTOTYPES *********************************************/
void InitializeSystem(void);
void UsbToMidiProcess(void);
void MidiToUsbProcess(void);
void YourHighPriorityISRCode();
void YourLowPriorityISRCode();
void USBCBSendResume(void);
#define TRIS_(p, m) TRIS ## p ## bits.TRIS ## p ## m
#define LAT_(p, m) LAT ## p ## bits.LAT ## p ## m
#define PORT_(p, m) PORT ## p ## bits.R ## p ## m
#define IOIN(x) x(TRIS_) = 1
#define IOOUT(x) x(TRIS_) = 0
#define SET(x) x(LAT_) = 1
#define CLR(x) x(LAT_) = 0
#define GET(x) x(PORT_)
#pragma code
/******************************************************************************
* Function: void YourHighPriorityISRCode()
*****************************************************************************/
#pragma interrupt YourHighPriorityISRCode
void YourHighPriorityISRCode()
{
#if defined(USB_INTERRUPT)
USBDeviceTasks();
#endif
UartRxIntProcess();
UartTxIntProcess();
if(INTCONbits.TMR0IF)
{
Timer0Compless();
Timer0IrqAck();
ActSenzTime = 1;
}
} //This return will be a "retfie fast", since this is in a #pragma interrupt section
/******************************************************************************
* Function: YourLowPriorityISRCode()
*****************************************************************************/
#pragma interruptlow YourLowPriorityISRCode
void YourLowPriorityISRCode()
{
} //This return will be a "retfie", since this is in a #pragma interruptlow section
/******************************************************************************
* Function: void main(void)
*****************************************************************************/
void main(void)
{
InitializeSystem();
#if defined(USB_INTERRUPT)
USBDeviceAttach();
#endif
// #include "debugtestdata.h"
while(1)
{
#if defined(USB_POLLING)
// Check bus status and service USB interrupts.
USBDeviceTasks(); // Interrupt or polling method. If using polling, must call
#endif
// User Application USB tasks
if((USBDeviceState == CONFIGURED_STATE) && (!USBSuspendControl))
{ // USB üzemben van
SET(LEDUSB);
UsbToMidiProcess();
MidiToUsbProcess();
}
else
CLR(LEDUSB);
}//end while
}//end main
/******************************************************************************
* Function: void InitializeSystem(void)
*****************************************************************************/
void InitializeSystem(void)
{
ADINIT; // A/D beállítás
CLR(LEDUSB); CLR(LEDIN); CLR(LEDOUT);
IOOUT(LEDUSB); IOOUT(LEDIN); IOOUT(LEDOUT);
IOIN(BOOTLOADER);
UartInit();
USBDeviceInit(); // usb_device.c. Initializes USB module SFRs and firmware variables to known states.
Timer0Init();
INTCONbits.GIE = 1; INTCONbits.PEIE = 1;
}//end InitializeSystem
//*******************************************************************
void UsbToMidiProcess(void)
{
// csomag index szám 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F
static rom unsigned char CinToLengt[] = {0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1}; // üzenet hosszak
static unsigned char packcount = 0; // ennyi adatcsomag érkezett eddig az USB-n *******
static unsigned char packetcounter = 0; // csomagon belüli bájtszámláló
static unsigned char packetsize = 0; // aktuális csomag mérete
static unsigned char* packetpointer = (char *)&UsbRecBuffer1; // mutató a csomag olvasásához
static unsigned char i = 0; // MIDI üzenet bájt számláló (0..3)
unsigned char c; // aktuális MIDI bájt
if(!packetsize)
{ // csomagméret == 0
// Active senzing küldése
if(ActSenzTime && uTxBufFree)
{
UartTx(0xFE);
ActSenzTime = 0;
}
CLR(LEDOUT);
if(!USBHandleBusy(USBRxHandle))
{ // USB nem foglalt
SET(LEDOUT);
packetsize = USBHandleGetLength(USBRxHandle);
packetpointer = USBHandleGetAddr(USBRxHandle);
packcount++;
packetcounter = 0;
if(packetpointer == UsbRecBuffer1)
USBRxHandle = USBRxOnePacket(MIDI_EP, (BYTE*)&UsbRecBuffer2, 64);
else
USBRxHandle = USBRxOnePacket(MIDI_EP, (BYTE*)&UsbRecBuffer1, 64);
}
}
else
{ // van küldeni való csomag
// ------------------------- adatcsomag elküldése MIDI OUT-ra
if(uTxBufFree) // lehet irni az UART kimenetre
{
c = *packetpointer;
if(!(packetcounter & 0x03)) // 0, 4, 8, ... 60. bájt a csomag
{ // csomag azonosító (CIN, CN)
i = CinToLengt[c & 0x0F]; // hossz táblázat
}
else
{ // adat bájtok
if(i)
{ // ------------------------- még tart a csomag
// spiDebugPutChar(c);
UartTx(c);
i--;
}
}
packetpointer++;
if(++packetcounter == packetsize)
packetsize = 0;
}
}
}
//********************************************************************
void MidiToUsbProcess(void)
{
// index 8, 9, A, B, C, D, E, F
static rom unsigned char MidiMsgChnToLen[] = {3, 3, 3, 3, 2, 2, 3, 0};
// Midi adat, USB Midi csomag legels? adatbájtja
union
{
struct
{
unsigned chn: 4;
unsigned cmd: 3;
unsigned st: 1;
};
unsigned char chr;
}ch;
// Midi forrás jelzések
static union
{
struct
{
unsigned work: 1;
unsigned midiin: 1;
unsigned sysex: 1;
};
unsigned char ch;
}Source = 0;
// static unsigned char cnt = 0;
static unsigned char MidiStatus = 0;
static unsigned char MidiMsgLen = 0;
static unsigned char i = 0;
// ha USB módban az USB foglalt akkor kilépünk
if(USBHandleBusy(USBTxHandle))
return;
// Midi forrás olvasása
if(!uRxLength)
{
CLR(LEDIN);
return; // nem jött MIDI adat -> nincs mit feldolgozni
}
SET(LEDIN);
ch.chr = UartRx();
// spiDebugPutHex8(ch.chr);
if(ch.st)
{ // státuszbájt érkezett ( >=0x80 )
if(ch.chr < 0xF0)
{ // ------------------------- Channel Voice Messages (0x80..0xEF)
Source.sysex = 0;
MidiStatus = ch.chr;
MidiData.v[0] = (ch.chr >> 4) + (CABLENUM << 4); // CIN
MidiData.v[1] = ch.chr;
MidiMsgLen = MidiMsgChnToLen[(ch.chr >> 4) & 0x07];
i = 1;
}
else
{ // Egyszerü rendszerüzenetek (0xF0..0xF7) és valós idejü rendszerüzenetek (0xF8..0xFF)
if(ch.chr < 0xF8)
{ // Egyszerü rendszerüzenetek (0xF0..0xF7) státusztartás törlés
MidiStatus = ch.chr;
}
if(ch.chr == 0xF0)
{ // --------------------------------------------------------- SYSEX start
Source.sysex = 1;
MidiData.v[0] = MIDI_CIN_SYSEX_START + i + (CABLENUM << 4);
MidiData.v[1] = 0xF0;
MidiMsgLen = 3;
i = 1;
}
else if(ch.chr == 0xF7)
{ // ---------------------------------------------------------- SYSEX stop
MidiStatus = 0;
Source.sysex = 0;
MidiData.v[0] = MIDI_CIN_SYSEX_ENDS_1 + i + (CABLENUM << 4);
i++;
MidiData.v[i] = 0xF7;
USBTxHandle = USBTxOnePacket(MIDI_EP, (BYTE*)&MidiData, 4);
MidiMsgLen = 0;
MidiStatus = 0;
Source.work = 0;
i = 0;
}
else if(ch.chr == 0xF1)
{ // --------------------------------------------------- MTC Quarter-Frame
MidiMsgLen = 2;
i = 1;
}
else if(ch.chr == 0xF2)
{ // ----------------------------------------------- Song Position Pointer
MidiMsgLen = 3;
i = 1;
}
else if(ch.chr == 0xF3)
{ // --------------------------------------------------------- Song Select
MidiMsgLen = 2;
i = 1;
}
else
{ //----------------------------------------------------------- 0xF4..0xFF
CommonMidiData.v[0] = 5 + (CABLENUM << 4); // CIN
CommonMidiData.v[1] = ch.chr;
CommonMidiData.v[2] = 0;
CommonMidiData.v[3] = 0;
USBTxHandle = USBTxOnePacket(MIDI_EP, (BYTE*)&CommonMidiData, 4);
Source.work = 0;
if(ch.chr < 0xF8)
{
MidiStatus = 0;
}
}
} // Egyszerü rendszerüzenetek (0xF0..0xF7)
}
else
{ // ------------------------- adatbájt érkezett ( <0x80 )
if(!MidiStatus)
{ // státusz nélküli adatbájt
Source.work = 0;
return;
}
i++;
MidiData.v[i] = ch.chr;
if(i >= MidiMsgLen)
{ // üzenet vége van
USBTxHandle = USBTxOnePacket(MIDI_EP, (BYTE*)&MidiData, 4);
// üzenet vége
Source.work = 0;
i = 0;
if(Source.sysex)
Source.work = 1; // Sysex esetén a munkafolyamat csak sysex end-re ér véget
else
i++;
if(MidiStatus >= 0xF1)
MidiStatus = 0; // Egyszerü több bájtos rendszerüzeneteknek nincs státusztartása
} // if(i >= MidiMsgLen)
}
}
// ******************************************************************************************************
// ************** USB Callback Functions ****************************************************************
// ******************************************************************************************************
/******************************************************************************
* Function: void USBCBSuspend(void)
*****************************************************************************/
void USBCBSuspend(void)
{
}
/******************************************************************************
* Function: void _USB1Interrupt(void)
*****************************************************************************/
#if 0
void __attribute__ ((interrupt)) _USB1Interrupt(void)
{
#if !defined(self_powered)
if(U1OTGIRbits.ACTVIF)
{
IEC5bits.USB1IE = 0;
U1OTGIEbits.ACTVIE = 0;
IFS5bits.USB1IF = 0;
//USBClearInterruptFlag(USBActivityIFReg,USBActivityIFBitNum);
USBClearInterruptFlag(USBIdleIFReg,USBIdleIFBitNum);
//USBSuspendControl = 0;
}
#endif
}
#endif
/******************************************************************************
* Function: void USBCBWakeFromSuspend(void)
*****************************************************************************/
void USBCBWakeFromSuspend(void)
{
}
/********************************************************************
* Function: void USBCB_SOF_Handler(void)
*******************************************************************/
void USBCB_SOF_Handler(void)
{
if(msCounter != 0)
{
msCounter--;
}
}
/*******************************************************************
* Function: void USBCBErrorHandler(void)
*******************************************************************/
void USBCBErrorHandler(void)
{
}
/*******************************************************************
* Function: void USBCBCheckOtherReq(void)
*******************************************************************/
void USBCBCheckOtherReq(void)
{
}//end
/*******************************************************************
* Function: void USBCBStdSetDscHandler(void)
*******************************************************************/
void USBCBStdSetDscHandler(void)
{
// Must claim session ownership if supporting this request
}//end
/*******************************************************************
* Function: void USBCBInitEP(void)
*******************************************************************/
void USBCBInitEP(void)
{
//enable the HID endpoint
USBEnableEndpoint(MIDI_EP,USB_OUT_ENABLED | USB_IN_ENABLED | USB_HANDSHAKE_ENABLED | USB_DISALLOW_SETUP);
//Re-arm the OUT endpoint for the next packet
USBRxHandle = USBRxOnePacket(MIDI_EP, (BYTE*)&UsbRecBuffer1, 64);
}
/********************************************************************
* Function: void USBCBSendResume(void)
*******************************************************************/
void USBCBSendResume(void)
{
static WORD delay_count;
if(USBGetRemoteWakeupStatus() == TRUE)
{
if(USBIsBusSuspended() == TRUE)
{
USBMaskInterrupts();
//Clock switch to settings consistent with normal USB operation.
USBCBWakeFromSuspend();
USBSuspendControl = 0;
USBBusIsSuspended = FALSE; //So we don't execute this code again,
//until a new suspend condition is detected.
delay_count = 3600U;
do
{
delay_count--;
}while(delay_count);
//Now drive the resume K-state signalling onto the USB bus.
USBResumeControl = 1; // Start RESUME signaling
delay_count = 1800U; // Set RESUME line for 1-13 ms
do
{
delay_count--;
}while(delay_count);
USBResumeControl = 0; //Finished driving resume signalling
USBUnmaskInterrupts();
}
}
}
/*******************************************************************
* Function: BOOL USER_USB_CALLBACK_EVENT_HANDLER(
* USB_EVENT event, void *pdata, WORD size)
*******************************************************************/
BOOL USER_USB_CALLBACK_EVENT_HANDLER(USB_EVENT event, void *pdata, WORD size)
{
switch(event)
{
case EVENT_TRANSFER:
//Add application specific callback task or callback function here if desired.
break;
case EVENT_SOF:
USBCB_SOF_Handler();
break;
case EVENT_SUSPEND:
USBCBSuspend();
break;
case EVENT_RESUME:
USBCBWakeFromSuspend();
break;
case EVENT_CONFIGURED:
USBCBInitEP();
break;
case EVENT_SET_DESCRIPTOR:
USBCBStdSetDscHandler();
break;
case EVENT_EP0_REQUEST:
USBCBCheckOtherReq();
break;
case EVENT_BUS_ERROR:
USBCBErrorHandler();
break;
case EVENT_TRANSFER_TERMINATED:
//Add application specific callback task or callback function here if desired.
//The EVENT_TRANSFER_TERMINATED event occurs when the host performs a CLEAR
//FEATURE (endpoint halt) request on an application endpoint which was
//previously armed (UOWN was = 1). Here would be a good place to:
//1. Determine which endpoint the transaction that just got terminated was
// on, by checking the handle value in the *pdata.
//2. Re-arm the endpoint if desired (typically would be the case for OUT
// endpoints).
break;
default:
break;
}
return TRUE;
}