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TLC548 8-bit SPI ADC Driver

 
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sshahryiar



Joined: 05 May 2010
Posts: 92
Location: Dhaka, Bangladesh

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TLC548 8-bit SPI ADC Driver
PostPosted: Tue Apr 09, 2013 4:22 am     Reply with quote

Code:
#include <16F87.h>


#device *= 16

                 
#fuses NOWDT, INTRC, PROTECT, CPD, PUT, NOWRT
#fuses NOMCLR, BROWNOUT,  FCMEN, NOIESO, NOLVP

                                     
#define CS_pin             pin_A0
#define Data_In_pin        pin_A1
#define Clock_pin          pin_A2   
                         
             
#use delay (clock = 4MHz)                             
#use SPI(MASTER, DI = Data_In_pin, CLK = Clock_pin, BITS = 8, SAMPLE_RISE)                         
                       
                                       
#include <lcd420.c>             
                               
           
void setup();         
                                                                                   
                                     
void main()             
{                                     
    register float v = 0.0; 
    unsigned char adc_value = 0;
    setup();           
    while(TRUE)                                                           
    {                                                       
        output_low(CS_pin);               
        adc_value = spi_xfer(0);
        output_high(CS_pin);
        v = (adc_value * 5.0);   
        v /= 255.0;     
        lcd_gotoxy(1,1);
        printf(lcd_putc, "V: %1.2f Volt ", v);       
        lcd_gotoxy(1,2);           
        printf(lcd_putc, "ADC: %3u ", adc_value); 
        delay_ms(200);                       
    };
}                                       

                                                 
void setup()                           
{
    setup_oscillator(OSC_4MHZ);
    disable_interrupts(global);
    setup_WDT(WDT_off);
    setup_comparator(NC_NC_NC_NC);
    setup_CCP1(CCP_off);
    setup_SPI(SPI_disabled);           
    setup_timer_0(0 | 0 | 0);
    setup_timer_1(T1_disabled);
    setup_timer_2(T2_disabled, 255, 1);
    set_timer0(0);           
    set_timer1(0);                   
    set_timer2(0);
    output_high(CS_pin);
    lcd_init();   
    lcd_putc("\f");
    delay_ms(100);   
}

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