git://stoneship.org.uk / onewire / blame
| Commit | Line | Data |
|---|---|---|
| bba33fe1 JM |
1 | /******************************************************************************/ |
| 2 | /* Files to Include */ | |
| 3 | /******************************************************************************/ | |
| 4 | ||
| 5 | #if defined(__XC) | |
| 6 | #include <xc.h> /* XC8 General Include File */ | |
| 7 | #elif defined(HI_TECH_C) | |
| 8 | #include <htc.h> /* HiTech General Include File */ | |
| 9 | #endif | |
| 10 | ||
| 11 | #include <stdint.h> /* For uint8_t definition */ | |
| 12 | #include <stdbool.h> /* For true/false definition */ | |
| 13 | ||
| 14 | #include "system.h" | |
| 15 | #include "user.h" | |
| 16 | ||
| 17 | /******************************************************************************/ | |
| 18 | /* User Functions */ | |
| 19 | /******************************************************************************/ | |
| 20 | ||
| 21 | /* <Initialize variables in user.h and insert code for user algorithms.> */ | |
| 22 | ||
| 23 | void InitApp(void) | |
| 24 | { | |
| 25 | /* set watchdog to 4 seconds and enable it */ | |
| 26 | WDTCONbits.WDTPS = 0b01100; | |
| 27 | WDTCONbits.SWDTEN = 1; | |
| 28 | ||
| 29 | /* Select pins 4&5 as the uart - page 102 */ | |
| 30 | APFCONbits.RXDTSEL = 0; /* RX/DT on RA1 */ | |
| 31 | APFCONbits.TXCKSEL = 0; /* TX/CK on RA0 */ | |
| 32 | TRISAbits.TRISA1 = 1; /* RA5 as input */ | |
| 33 | TRISAbits.TRISA0 = 0; /* RA4 as output */ | |
| 34 | ||
| 35 | ANSELA = 0; /* no analog */ | |
| 36 | ||
| 37 | ||
| 38 | /* enable weak pullups, clear them all */ | |
| 39 | WPUA = 0; | |
| 40 | //WPUAbits.WPUA0 = 0x00000100; // RA0 pullup for 1-wire bus | |
| 41 | OPTION_REGbits.nWPUEN = 1; | |
| 42 | ||
| 43 | /* Enabling transmitter 26.1.1.1 page 259 - TX/CK I/O pin */ | |
| 44 | TXSTAbits.TXEN = 1; | |
| 45 | TXSTAbits.SYNC = 0; | |
| 46 | RCSTAbits.SPEN = 1; | |
| 47 | /* Enabling receiver 26.1.2 page 262 - RX/DT I/O pin */ | |
| 48 | RCSTAbits.CREN = 1; | |
| 49 | ||
| 50 | /* 4MHz clock, 57k6 baud */ | |
| 51 | TXSTAbits.BRGH = 1; | |
| 52 | BAUDCONbits.BRG16 = 1; | |
| 53 | //SPBRG = 16; // 57k6 | |
| 54 | SPBRG = 51; // 19k2 | |
| 55 | //SPBRG = 103; // 9k6 | |
| 56 | ||
| 57 | // enable debug LED on RA4 | |
| 58 | TRISAbits.TRISA4 = 0; | |
| 59 | ANSELAbits.ANSA4 = 0; | |
| 60 | ||
| 61 | // setup timer1 | |
| 62 | ||
| 63 | // enable the timer (off for now, not gated mode) | |
| 64 | T1CONbits.TMR1ON = 0; | |
| 65 | T1GCONbits.TMR1GE = 0; | |
| 66 | T1CONbits.TMR1CS = 0b00; // instruction clock | |
| 67 | T1CONbits.T1CKPS = 0b11; // div 8 | |
| 68 | ||
| 69 | ||
| 70 | // enable TIMER1 interupt | |
| 71 | PIE1bits.TMR1IE = 1; | |
| 72 | ||
| 73 | /* Enable interrupts */ | |
| 74 | INTCONbits.GIE = 1; | |
| 75 | INTCONbits.PEIE = 1; | |
| 76 | ||
| 77 | /* enable uart receiver interupt */ | |
| 78 | PIE1bits.RCIE = 1; | |
| 79 | } | |
| 80 |