gpmctest

/**************************************GPMC_TEST.c*************************************/
//Author: Dhiraj Jadhav
//Date: 06/05/2012
//Description: this program configures the gpmc device for beaglebone for an synchronous burst read and //write operation.
#include<stdio.h>
#include<stdlib.h>
#include<sys/types.h>
#include<sys/io.h>
#include<sys/mman.h>
#include<fcntl.h>
#define GPMC_START        0x50000000
#define GPMC_MEM_START     0x00000000

#define GPMC_REVISION 0x00
#define GPMC_SYSCONFIG 0x10
#define GPMC_SYSSTATUS 0x14
#define GPMC_IRQSTATUS 0x18
#define GPMC_IRQENABLE 0x1C
#define GPMC_TIMEOUT_CONTROL 0x40
#define GPMC_ERR_ADDRESS  0x44
#define GPMC_ERR_TY   0x48
#define GPMC_CONFIG 0x50
#define GPMC_STATUS 0x54
#define GPMC_CONFIG1_i 0x60
#define GPMC_CONFIG2_i 0x64
#define GPMC_CONFIG3_i 0x68
#define GPMC_CONFIG4_i 0x6C
#define GPMC_CONFIG5_i 0x70
#define GPMC_CONFIG6_i 0x74
#define GPMC_CONFIG7_i 0x78


int main(void)
{
int result=0,loop=100;
ulong *GPMC,*GPMC_MEM;
int raw_fd = open("/dev/mem", O_RDWR | O_SYNC);
GPMC = (ulong*) mmap(0,0xFFFF, PROT_READ | PROT_WRITE, MAP_SHARED,raw_fd,GPMC_START);
GPMC_MEM = (ulong*) mmap(0,0xFFF, PROT_READ | PROT_WRITE, MAP_SHARED,raw_fd,GPMC_MEM_START);
while(result==0)
{
loop=100;
printf("\nGPMC_REVISION=0x%x", GPMC[GPMC_REVISION/4]);
printf("\nGPMC_SYSCONFIG=0x%x", GPMC[GPMC_SYSCONFIG/4]);

printf("\nGPMC_SYSSTATUS =0x%x", GPMC[GPMC_SYSSTATUS/4]);

printf("\nGPMC_IRQSTATUS =0x%x", GPMC[GPMC_IRQSTATUS/4]);

printf("\nGPMC_IRQENABLE =0x%x", GPMC[GPMC_IRQENABLE/4]);


printf("\nGPMC_ERR_ADDRESS =0x%x", GPMC[GPMC_ERR_ADDRESS/4]);
printf("\nGPMC_ERR_TY =0x%x", GPMC[GPMC_ERR_TY/4]);
printf("\nGPMC_CONFIG =0x%x", GPMC[GPMC_CONFIG/4]);
printf("\nGPMC_STATUS =0x%x", GPMC[GPMC_STATUS/4]);

GPMC[GPMC_CONFIG1_i/4]=0x7A001203;
printf("\nGPMC_CONFIG1_i =0x%x", GPMC[GPMC_CONFIG1_i/4]);
GPMC[GPMC_CONFIG2_i/4]=0x00000B00;
printf("\nGPMC_CONFIG2_i =0x%x", GPMC[GPMC_CONFIG2_i/4]);
GPMC[GPMC_CONFIG3_i/4]=0x00000200;
printf("\nGPMC_CONFIG3_i =0x%x", GPMC[GPMC_CONFIG3_i/4]);
GPMC[GPMC_CONFIG4_i/4]=0x00000B03;
printf("\nGPMC_CONFIG4_i =0x%x", GPMC[GPMC_CONFIG4_i/4]);
GPMC[GPMC_CONFIG5_i/4]=0x0100000B0;
printf("\nGPMC_CONFIG5_i =0x%x", GPMC[GPMC_CONFIG5_i/4]);
GPMC[GPMC_CONFIG6_i/4]=0x00000000;
printf("\nGPMC_CONFIG6_i =0x%x", GPMC[GPMC_CONFIG6_i/4]);
GPMC[GPMC_CONFIG7_i/4]=0x00000F40;
printf("\nGPMC_CONFIG7_i =0x%x", GPMC[GPMC_CONFIG7_i/4]);

GPMC_MEM[0x0/4]=0x7A000003;
printf("\n GPMC read =0x%x", GPMC_MEM[0x0/4]);
//printf("\n GPMC read =0x%x", GPMC_MEM[0x1]);

printf("\n continue reading 0:yes 1:no \n enteryour choice:");
scanf("%d",&result);
}
close(raw_fd);

return(0);
}



output:

root@beaglebone:/home/dhiraj# ./GPMC_test

GPMC_REVISION=0x60
GPMC_SYSCONFIG=0x9
GPMC_SYSSTATUS =0x1
GPMC_IRQSTATUS =0x0
GPMC_IRQENABLE =0x200
GPMC_ERR_ADDRESS =0x0
GPMC_ERR_TY =0x0
GPMC_CONFIG =0x12
GPMC_STATUS =0x101
GPMC_CONFIG1_i =0x7a001203
GPMC_CONFIG2_i =0xb00
GPMC_CONFIG3_i =0x200
GPMC_CONFIG4_i =0xb03
GPMC_CONFIG5_i =0x10
GPMC_CONFIG6_i =0x0
Bus error
root@beaglebone:/home/dhiraj#