[ts-7000] TS-9700 with the TS-7800

["bill.whiteley" <>]

Greetings! I am trying to get the 9700 Analog board working with the
new 7800. I have posted some code below that I would appreciate some
comments or suggestions on. I am a little new to the ARM9 on a pc/104
environment but have plenty of Linux experience and other embedded
environments.

What I am trying to do is enable the standard pc/104 bus and then
access the 9700 board. It seems like it should be pretty straight
forward, but all I get back when I try to read from the board is 0xff
and any commands to the DAC don't do anything. Also, I am compiling
with -mcpu=arm9, which I would guess is a common problem.

I am guessing that I am simply doing something fundamentally wrong.
Any help or suggestions would be appreciated. Thanks.

Also, on a side note. In the manuals when they talk about PC/104
expansion addresses they include an underscore: 0xEE00_0000. Why is that? 

Output from compile command:

make all 
Building file: ../adc-test.c
Invoking: GCC C Compiler
/root/software/cross-compile/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc
-O0 -g3 -Wall -c -fmessage-length=0 -mcpu=arm9 -MMD -MP
-MF"adc-test.d" -MT"adc-test.d" -o"adc-test.o" "../adc-test.c"
Finished building: ../adc-test.c
 
Building target: helloworld-arm
Invoking: GCC C++ Linker
/root/software/cross-compile/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-g++
-L/root/software/cross-compile/arm-none-linux-gnueabi/lib/gcc/arm-none-linux-gnueabi/3.4.4/install-tools
-L/root/software/cross-compile/arm-none-linux-gnueabi/lib -static
-o"helloworld-arm"  ./adc-test.o   
Finished building target: helloworld-arm

---------- Source Code ----------------
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <assert.h> 
#include <string.h>



#define BASE 0xEE000000
#define ADBASE 0x160
#define ID ADBASE + 1
#define DAC ADBASE + 4

typedef unsigned char byte;

//-----------------
// Main function 
//-----------------
int main(int argc, char **argv) {
        int devmem;
        unsigned int *regs;

        //Open the memory device 
        devmem = open("/dev/mem", O_RDWR|O_SYNC);
        assert(devmem != -1);


        //Get pointer to base address 
        regs = (unsigned int *)mmap(0, getpagesize(), PROT_READ|PROT_WRITE,
          MAP_SHARED, devmem,  0xe8000000);

                
        //Set the PC104 bus to ISA so we can talk to peripheral devices
        regs[0x30] = 0x55555555;
        regs[0x34] = 0x55555555;
        regs[0x38] = 0x55555;
        regs[0x3C] = 0x55555;
        
        usleep(100);
        
        //Output a DAC value
        
        byte *base;
        volatile byte *ldac;
        volatile byte *hdac;
        unsigned short int val;
        
        base = (byte*)mmap(0,getpagesize(), PROT_READ|PROT_WRITE, MAP_SHARED,
devmem, BASE);
        ldac = base + DAC;
        hdac = base + DAC + 1;
        
        val = 1345;
        val |= (0x0 << 14);
        *ldac = 0x25;
        *hdac = 0x00;
        
        printf("The PC104 is set to ISA\n");
        
        printf("Output: %x\n", *ldac);
        
        sleep(10);
        
        return 0;
}
---------------------------------------------------------

Thanks again!!


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