/home/daqweb/fgddaq/c8051/Devices/pca_internal.c File Reference

#include "../mscbemb.h"
#include "pca_internal.h"

Functions
void	pca_operation (unsigned char mode)

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Function Documentation

void pca_operation

(

unsigned char

mode

)

{
//      signed char i;
        if (mode == 1) {
        // PCA setup for Frequency Output Mode on CEX0
        // Set P0.4 as CEX0, requires RX/TX+SDA/SCK to be enable in the XBAR0
                SFRPAGE  = CONFIG_PAGE;
                P0MDOUT |= 0x10; // Add pin 4 (CHG_PMP_CLK) to PushPull
                XBR0     = 0x0D; // Route SMB (SDA and SCL); Route UART (TX and RX);and Route CEX0(CHG_PMP_CLK) to their pins 
                XBR2     = 0x40; // Enable Xbar

                SFRPAGE  = LEGACY_PAGE;
                PCA0MD   = 0x02;  // Sysclk (default CKCON [2MHz])
                PCA0CPL0 = 0x00;
                PCA0CPM0 = 0x46; // ECM, TOG, PWM
                PCA0CPH0 = 10 ;   // (for ~2MHz)                       
                PCA0CN   = 0x40; // Enable PCA Run Control 

        } else if (mode == 2) {
                SFRPAGE  = LEGACY_PAGE;
                PCA0CN   = 0x00 ;   //Turn off the PCA counter

        } else if (mode == 3) {
                SFRPAGE  = LEGACY_PAGE;
                PCA0CN   = 0x40 ;   //Turn on the PCA counter
    }
        
}

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