main.inc

Synchronous Serial Communications (SSC) is a synchronous serial communications protocol between

;----------------------------------------------------------------------
; PICDEM(R) System Monitoring Demo Board
;----------------------------------------------------------------------

#include    <p16f690.inc>           ; processor specific variable definitions

;----------------------------------------------------------------------
; I/O Ports Configuration
;----------------------------------------------------------------------

    ;--------------------
    ; PORTA (Section 4.1)
    ;--------------------
    ; PORTA is an 6-bit wide, bi-directional port. The corresponding data
    ; direction register is TRISA. Setting a TRISA bit (= 1) will make
    ; the corresponding PORTA pin and input. Clearing a TRISA bit (= 0)
    ; will make the corresponding PORTA pin an output. The exception is
    ; RA3, which is input only and its TRIS bit will always read as a '1'.
    ;
    ; Function of PORTA pins depend on:
    ;   Configuration Bits (CONFIG) (Section 14.1)
    ;   Weak Pull-up PORTA Register (WPUA) (Section 4.2.1)
    ;   Interrupt-on-change PORTA Register (IOCA) (Section 4.2.2)
    ;   Ultra Low-Power Wake-up (Section 4.2.3)
    ;   Option Register (OPTION_REG) (Register 2-2)
    ;   TIMER1 Control Register (T1CON) (Register 6-1)
    ;   Comparator Module (Section 8)
    ;   Comparator Reference (Section 8)
    ;   A/D Control Register (ADCON0) (Section 9)

#define SSCDAT      PORTA, 0        ; (Digital Input/Output)
#define SSCCLK      PORTA, 1        ; (Digital Input/Output)
#define RA2         PORTA, 2        ; (Digital Input/Output)
#define RA3         PORTA, 3        ; (Digital Input Only)
#define T1G         PORTA, 4        ; (Digital Input) Timer1 Gate NOT input
#define RA5         PORTA, 5        ; (Digital Input/Output)

    ; Define for TRISA Register

    ;     PORTA Pins = xx543210
#define PORT_A_TRIS  b'11111111'

    ;--------------------
    ; PORTB (Section 4.3)
    ;--------------------
    ; PORTB is a general purpose I/O port consisting of 4 bi-directional
    ; pins. 
    ;
    ; Function of PORTB pins depend on:
    ;   Weak Pull-up PORTB Register (WPUB) (Section 4.4.1)
    ;   Interrupt-on-change PORTB Register (IOCB) (Section 4.4.2)
    ;   A/D Control Register (ADCON0) (Section 9)
    ;   EUSART (Section 12)
    ;   SSP Module (Section 13)

#define RB4         PORTB, 4        ; 
#define RB5         PORTB, 5        ; 
#define RB6         PORTB, 6        ; 
#define RB7         PORTB, 7        ; 

    ; Define for TRISB Register

    ;     PORTB Pins = 7654xxxx
#define PORT_B_TRIS  b'11111111'

    ;--------------------
    ; PORTC (Section 4.5)
    ;--------------------
    ; PORTC is a general purpose I/O port consisting of 8 bi-directional
    ; pins. The pins can be configured for either digital I/O or analog
    ; input to A/D converter. For specific information about individual
    ; functions such as the Enhanced CCP or the A/D, refer to the 
    ; appropriate section in the data sheet.
    ;
    ; Function of PORTC pins depend on:
    ;   Comparator Module (Section 8)
    ;   Analog-to-Digital Converter (A/D) Module (Section 9)
    ;   ECCP Module (Section 11)
    ;   SSP Module (Section 13)

#define RC0         PORTC, 0        ; 
#define Vsen        PORTC, 1        ; (Analog Input) Voltage Sense
#define Vint        PORTC, 2        ; (Digital Output) Voltage Integration
#define SO          PORTC, 3        ; (Digital Output)
#define Q_NOT_OUT   PORTC, 4        ; (Digitial Output) SR Latch Q_NOT output
#define RC5         PORTC, 5        ; (Digital Output) Trigger
#define RC6         PORTC, 6        ; 
#define RC7         PORTC, 7        ; 

    ; Define for TRISC Register

    ;     PORTC Pins = 76543210
#define PORT_C_TRIS  b'11000011'

;----------------------------------------------------------------------
; Global Defines
;----------------------------------------------------------------------

#define CLOCKSPEED  .8000000        ; 8 MHz Osc

#define VERSION     0x02            ; Firmware version number

#define CMD_UNSUCCESSFUL            0xFF
#define CMD_Version_ACK             0x10  ; Version command was successful
#define CMD_01_ACK                  0x11  ; 
#define CMD_02_ACK                  0x12  ; 
#define CMD_03_ACK                  0x13  ; 
#define CMD_04_ACK                  0x14  ; 
#define CMD_05_ACK                  0x15  ; 
#define CMD_06_ACK                  0x16  ;