[ts-7000] user level access to timer 3

["w_heller2000" <>]

I am trying to get timer3 working on a TS-7200 I have taken the 
T4ticks.c code as a starting point and changed it to address timer3 
and also changed the location of the enable bit what I am finding is 
the timer is not starting ie the value register doesn't increment 
after I write to the load register and set the enable flag. If anyone 
has suggestions please pass them along. 

Here is the code as of now.
//T3ticks.c
#include<unistd.h>
#include<sys/types.h>
#include<sys/mman.h>
#include<stdio.h>
#include<fcntl.h>
#include "T3ticks.h"

// Global pointes to T3value and T3load registers (0x80810080 & 
0x80810084).

unsigned int *t3value,*t3load,*t3control,*t3clear;
int fd,temp;
unsigned char *start;

// T3ticks_ms() - Returns a counter which increments at approx 1ms 
rate.

unsigned long T3ticks_ms()
{
        return (unsigned long)(*t3value >> 9);
}

// T3ticks_raw() - Returns a counter which increments at full speed 
(2kHz).

unsigned long T3ticks_raw()
{
        return (unsigned long)(*t3value);
}

// start_T3() - Starts the counter and sets up T4 memory pointers.

int start_T3()

{
        unsigned char *start;

        int fd = open("/dev/mem", O_RDWR);
        start = mmap(0, getpagesize(), PROT_READ|PROT_WRITE, 
MAP_SHARED, fd, 0x80810000);

        t3value = (unsigned int *)(start + 0x80);
        t3load = (unsigned int *)(start + 0x84);
        t3control = (unsigned int *)(start + 0x88);
        t3clear = (unsigned int *)(start + 0x8c);

//      t3control = 0x00;               // disable timer
//      *t3load = 0x80000000;
//      temp = *t3value;
        *t3control = 0x80;              // Enable timer
//      printf("Timer 3 control word 0x%X and value 0x%
X\n",*t3value,temp);
        return fd;
}


// Reset T3 - Set T3 back to zero.

int T3_reset()
{
        *t3control = 0;
        *t3clear = 0;
}

/*
        Test program which starts timer, and sets to pulse outputs at 
different frequencies.
        
        At each point in time it prints the 1ms and raw timer 
readings.
*/ 

int main(int argc, char **argv)
{
        unsigned long TimeNow,EndTime,Pulse1Time,Pulse2Time;
        
        int fd=start_T3();              // Start Timer (does not 
clear)


        /* Reset is demonstrated but not recommended
           as T3 could be used by another program */

        //T3_reset();                                           // 
Reset T4 to zero        
        
        TimeNow=T3ticks_ms();
        EndTime=TimeNow+10000;
        Pulse1Time=TimeNow+250;
        Pulse2Time=TimeNow+1000;

        printf("Start: 0x%X 0x%X\n",TimeNow,T3ticks_raw());
        printf("Pulse times 0x%X 0x%X\n",Pulse1Time,Pulse2Time);
        while ((TimeNow=T3ticks_ms())<EndTime)
        {
                if (TimeNow>Pulse1Time) 
                {
                        printf("Pulse1: %lx %llx\n", TimeNow, 
T3ticks_raw());
                        Pulse1Time+=250;
                }
                if (TimeNow>Pulse2Time) 
                {                    
                        printf("Pulse2: %lx %llx\n", TimeNow, 
T3ticks_raw());
                        Pulse2Time+=1000;
                }
        }
        printf("End: %lx %llx\n", TimeNow,T3ticks_raw());
        
        close(fd);
}


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