67 |
bit global_comm_error; |
bit global_comm_error; |
68 |
|
|
69 |
unsigned char global_comm_slipstate; |
unsigned char global_comm_slipstate; |
70 |
unsigned char global_comm_currentrate; |
unsigned char global_comm_baudrate; |
71 |
|
|
72 |
unsigned char global_lcd_buffer[20]; |
unsigned char global_lcd_buffer[2][20]; |
|
unsigned char global_lcd_index; |
|
73 |
|
|
74 |
|
|
75 |
bit global_led_0; |
bit global_led_0; |
88 |
void recieve_interrupt(void) |
void recieve_interrupt(void) |
89 |
{ |
{ |
90 |
unsigned char data = RCREG; |
unsigned char data = RCREG; |
91 |
RB2 = !RB2; |
|
92 |
|
if (global_comm_length == BUFFERLEN) //avoid buffer overrun |
93 |
|
global_comm_slipstate == SlipError; |
94 |
|
|
95 |
switch (global_comm_slipstate) |
switch (global_comm_slipstate) |
96 |
{ |
{ |
141 |
RB2 = !RB2; |
RB2 = !RB2; |
142 |
} |
} |
143 |
*/ |
*/ |
144 |
|
//Timer1 er en 16 bit timer, der kører med en 1:8 prescaler, |
145 |
|
// og er styret fra en ekstern 32768 Hz krystal |
146 |
|
//Når at registrene preloades med 0xEFFF vil det resultere i en |
147 |
|
//timer overflow ca hvert sekund |
148 |
|
void timer1_interrupt(void) |
149 |
|
{ |
150 |
|
TMR1H = 0xEF; |
151 |
|
TMR1L = 0xFF; |
152 |
|
} |
153 |
void interrupt interrupt_handler(void) |
void interrupt interrupt_handler(void) |
154 |
{ |
{ |
155 |
if (RCIF == 1) |
if (RCIF == 1) |
163 |
TXIF = 0; |
TXIF = 0; |
164 |
} |
} |
165 |
*/ |
*/ |
166 |
|
|
167 |
|
if (TMR1IF == 1) |
168 |
|
{ |
169 |
|
timer1_interrupt(); |
170 |
|
TMR1IF = 0; |
171 |
|
} |
172 |
} |
} |
173 |
|
|
174 |
/////////////////////////////////////////////////////////////////// |
/////////////////////////////////////////////////////////////////// |
175 |
// Slip funktioner |
// Slip funktioner |
176 |
|
|
177 |
|
|
178 |
void slip_reset(void) |
void slip_reset(void) |
179 |
{ |
{ |
180 |
global_comm_error = 0; |
global_comm_error = 0; |
255 |
{ |
{ |
256 |
//we can only handle 1200,2400,9600,19200 |
//we can only handle 1200,2400,9600,19200 |
257 |
if (data == 0 || data == 1 || data == 3 || data == 4) |
if (data == 0 || data == 1 || data == 3 || data == 4) |
258 |
|
{ |
259 |
global_reset_baudrate = 1; |
global_reset_baudrate = 1; |
260 |
|
global_comm_baudrate = data; |
261 |
|
} |
262 |
else |
else |
263 |
global_comm_error = 1; |
global_comm_error = 1; |
264 |
} |
} |
317 |
} |
} |
318 |
|
|
319 |
/////////////////////////////////////////////////////////////////// |
/////////////////////////////////////////////////////////////////// |
320 |
// Gennerelle funktioner |
// init funktioner |
321 |
|
|
322 |
void interrupt_init(void) |
void interrupt_init(void) |
323 |
{ |
{ |
330 |
|
|
331 |
TXIF = 0; //nulstil intterupt flag |
TXIF = 0; //nulstil intterupt flag |
332 |
RCIF = 0; |
RCIF = 0; |
333 |
|
|
334 |
|
TMR1IE = 1; // Timer 1 |
335 |
|
|
336 |
GIE = 1; //Global interrupt enable bit |
GIE = 1; //Global interrupt enable bit |
337 |
} |
} |
423 |
#endif |
#endif |
424 |
} |
} |
425 |
|
|
426 |
|
void timer_init(void) |
427 |
|
{ |
428 |
|
TMR1CS = 1; //use external clock |
429 |
|
|
430 |
|
T1CKPS1 = 1; //1:8 prescale |
431 |
|
T1CKPS0 = 1; |
432 |
|
|
433 |
|
TMR1H = 0xEF; |
434 |
|
TMR1L = 0xFF; |
435 |
|
|
436 |
|
T1OSCEN = 1; //enable oscillator circuit |
437 |
|
RD16 = 0; //normal 8 bit writes |
438 |
|
TMR1ON = 1; |
439 |
|
} |
440 |
|
|
441 |
|
/////////////////////////////////////////////////////////////////// |
442 |
|
// Gennerelle funktioner |
443 |
|
|
444 |
|
|
445 |
char ReadTemp(void) |
char ReadTemp(void) |
453 |
return temp; |
return temp; |
454 |
} |
} |
455 |
|
|
456 |
|
void update_lcd(void) |
457 |
|
{ |
458 |
|
} |
459 |
|
|
460 |
|
void reset_baudrate(void) |
461 |
|
{ |
462 |
|
SPEN = 0; //disable serial port |
463 |
|
|
464 |
|
//set baudrate generator, i henhold til side 171 af PIC18F452 dokumentationen |
465 |
|
switch (global_comm_baudrate) |
466 |
|
{ |
467 |
|
case Baud1200: |
468 |
|
SPBRG = 207; |
469 |
|
break; |
470 |
|
case Baud2400: |
471 |
|
SPBRG = 103; |
472 |
|
break; |
473 |
|
case Baud9600: |
474 |
|
SPBRG = 25; |
475 |
|
break; |
476 |
|
case Baud19200: |
477 |
|
SPBRG = 12; |
478 |
|
break; |
479 |
|
default: |
480 |
|
SPBRG = 25; // this should not be possible, but default to 9600 anyway |
481 |
|
} |
482 |
|
SPEN = 1; // enable the serial port again |
483 |
|
} |
484 |
|
|
485 |
/////////////////////////////////////////////////////////////////// |
/////////////////////////////////////////////////////////////////// |
486 |
//Main |
//Main |
493 |
serial_init(); //9600 8N1 |
serial_init(); //9600 8N1 |
494 |
ad_init(); |
ad_init(); |
495 |
io_init(); |
io_init(); |
496 |
|
timer_init(); |
497 |
interrupt_init(); |
interrupt_init(); |
498 |
|
|
499 |
|
|
500 |
slip_reset(); //take SLIP FSM into normal state |
slip_reset(); //take SLIP FSM into normal state |
501 |
global_comm_currentrate = Baud9600; //default baudrate = 9600 |
global_comm_baudrate = Baud9600; //default baudrate = 9600 (allready set in serial_init) |
502 |
global_reset_baudrate = 0; |
global_reset_baudrate = 0; |
503 |
|
|
504 |
// initialisation completed and we are ready to recieve commands - enable serial reception |
// initialisation completed and we are ready to recieve commands - enable serial reception |
515 |
|
|
516 |
if ( global_reset_baudrate == 1) |
if ( global_reset_baudrate == 1) |
517 |
{ |
{ |
518 |
|
reset_baudrate(); |
519 |
} |
} |
520 |
|
|
521 |
RB1 = global_led_0; |
RB1 = global_led_0; |