;T __CONFIG _CONFIG1H, _OSCS_OFF_1H & _RCIO_OSC_1H
;T __CONFIG _CONFIG2L, _BOR_ON_2L & _BORV_20_2L & _PWRT_OFF_2L
;T __CONFIG _CONFIG2H, _WDT_ON_2H & _WDTPS_128_2H
;T __CONFIG _CONFIG3H, _CCP2MX_ON_3H
;T __CONFIG _CONFIG4L, _STVR_ON_4L & _LVP_OFF_4L & _DEBUG_OFF_4L
;T __CONFIG _CONFIG5L, _CP0_OFF_5L & _CP1_OFF_5L & _CP2_OFF_5L & _CP3_OFF_5L
;T __CONFIG _CONFIG5H, _CPB_ON_5H & _CPD_OFF_5H
;T __CONFIG _CONFIG6L, _WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L & _WRT3_OFF_6L
;T __CONFIG _CONFIG6H, _WRTC_OFF_6H & _WRTB_OFF_6H & _WRTD_OFF_6H
;T __CONFIG _CONFIG7L, _EBTR0_OFF_7L & _EBTR1_OFF_7L & _EBTR2_OFF_7L & _EBTR3_OFF_7L
;T __CONFIG _CONFIG7H, _EBTRB_OFF_7H
;******************************************************************************
;Variable definitions
; Th
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ese variables are only needed if low priority interrupts are used.
; More variables may be needed to store other special function registers used
; in the interrupt routines.
CBLOCK 0x080
WREG_TEMP ;variable used for context saving
STATUS_TEMP ;variable used for context saving
BSR_TEMP ;variable used for context saving
;
ENDC
CBLOCK 0x000
EXAMPLE ;example of a variable in aCC
ess RAM
;
temp ;
temp2
;
xmtreg ;
cntrb ;
cntra ;
bitCTR ;
tcount ;
speedLbyte ;T Being used in HWSPI_speed
;
ENDC
;******************************************************************************
;Reset vector
; This code will start executing when a reset occurs.
ORG 0x0000
goto Main ;go to start of main code
;******************************************************************************
;High priority interrupt vector
; This code will start executing when a high priority interrupt occurs or
; when any interrupt occurs if interrupt priorities are not enabLED.
ORG 0x0008
bra HighInt ;go to high priority interrupt routine
;******************************************************************************
;Low priority interrupt vector and routine
; This code will start executing when a low priority interrupt occurs.
; This code CAN be removed if low priority interrupts are not used.
ORG 0x0018
movff STATUS,STATUS_TEMP ;save STATUS register
movff WREG,WREG_TEMP ;save working register
movff BSR,BSR_TEMP ;save BSR register
; *** low priority interrupt code goes here ***
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movff BSR_TEMP,BSR ;restore BSR register
movff WREG_TEMP,WREG ;restore working register
movff STATUS_TEMP,STATUS ;restore STATUS register
retfie
;******************************************************************************
;High priority interrupt routine
; The high priority interrupt code is placed here to avoid conflICting with
; the low priority interrupt vector.
HighInt:
; *** high priority interrupt code goes here ***
retfie FAST
;******************************************************************************
;Start of main program
; The main program code is placed here.
Main:
; *** main code goes here ***
start
; *** Port Initialization ***
movlw 0x0FF
movwf PORTB
clrf PORTA
movlw 0x06 ;T Configure PortA as Digital
movwf ADCON1
movlw 0x00FB ;T A2 OUTPUT, ALL OTHERS INPUT
movwf TRISA
movlw 0x0001 ;T B0 INPUT, ALL OTHERS OUTPUT
movwf TRISB
movlw 0x0093 ;T C7-C0 => bit7-0
;T OUTPUTs: C6(TX), C5(MOSI), C3(SCLK), C2(CS)
;T INPUTs:C4 (MISO) and all others
movwf TRISC ;T TRISC bit3 Master = 0
bs
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f PORTC,RC2 ;T RC2 = CS\ Make CS\ high
; *** SPI Initialization ***
call HWSPI_init ;T Initialize the MSSP for SPI
; *** SPI Configuration ***
movlw b'00000000' ;T load W with test byte for CPOLCPHA 0,0
;T b'00000000' => CPOLCPHA 0,0
;T b'00000001' => CPOLCPHA 0,1
&
nbsp; ;T b'00000010' => CPOLCPHA 1,0
;T b'00000011' => CPOLCPHA 1,1
call HWSPI_W_configure
; *** SPI Speed ***
movlw b'00000000' ;T load W with test byte for SPI Freq
