Other Parts Discussed in Thread: TPS65217
Tool/software: Linux
Hi
Team
I am trying to test my i2c-omap.c driver on the beagle bone black board
I am using the default driver present
insmod install
[techveda@BBBlack:]# insmod i2c-original.ko
[ 24.326899] tps65217 0-0024: TPS65217 ID 0xe version 1.2
[ 24.333257] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
[ 24.356118] omap_i2c 4802a000.i2c: bus 1 rev0.11 at 100 kHz
[ 24.373599] omap_i2c 4819c000.i2c: bus 2 rev0.11 at 100 kHz
I am using the following application for testing this
i am Sure the i2c-omap driver is inserted
But when i try to run my applcation i get a timeout error
as below
ERROR: write() failed
[techveda@BBBlack:]# ./i2c50
SUCCESS: open(3) passed
SUCCESS: ioctl(fd, I2C_SLAVE, 0x50>>1) passed
Performing EEPROM Write operation
[ 172.058433] omap_i2c 4in my code in 819c000.i2c: controller timed out
[ 173.098410] omap_i2c 4819c000.i2c: controller timed out
ERROR: write() failed
[techveda@BBBlack:]#
[techveda@BBBlack:]#
Not sure what is wrong as per the patch from the source link
i have modified the delay to 6*1000
KIndly please help me out my application i have attached
Let me know if any another application to be used in case
I just wanna write the bytes to eeprom that is internally present and read back
as from the dtsi file i find the base_eeprom
&i2c2 {
pinctrl-names = "default";
pinctrl-0 = <&i2c2_pins>;
status = "okay";
clock-frequency = <100000>;
cape_eeprom0: cape_eeprom0@54 {
compatible = "at,24c256";
reg = <0x54>;
#address-cells = <1>;
#size-cells = <1>;
cape0_data: cape_data@0 {
reg = <0 0x100>;
};
};
cape_eeprom1: cape_eeprom1@55 {
compatible = "at,24c256";
reg = <0x55>;
#address-cells = <1>;
#size-cells = <1>;
cape1_data: cape_data@0 {
reg = <0 0x100>;
};
};
cape_eeprom2: cape_eeprom2@56 {
compatible = "at,24c256";
reg = <0x56>;
#address-cells = <1>;
#size-cells = <1>;
and my application is like
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <linux/fs.h>
#include <errno.h>
#include <string.h>
#include <linux/i2c-dev.h>
#include <linux/i2c.h>
/* chmod 666 /dev/i2c-0 */
int main(void)
{
// Data to be written to eeprom
unsigned char wbuf[17] = {0x00, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F };
unsigned char rbuf[16];
int i2c_addr = 0x54;
int status;
unsigned short int i;
// OPENING I2C DEVICE
int fd = open("/dev/i2c-2", O_RDWR);
if (fd < 0) {
printf("ERROR: open(%d) failed\n", fd);
return -1;
}
printf("\nSUCCESS: open(%d) passed\n", fd);
// SETTING EEPROM ADDR
status = ioctl(fd, I2C_SLAVE, i2c_addr);
if (status < 0)
{
printf("ERROR: ioctl(fd, I2C_SLAVE, 0x%02X) failed\n", i2c_addr);
close(fd);
return -1;
}
printf("\nSUCCESS: ioctl(fd, I2C_SLAVE, 0x%02X>>1) passed\n", i2c_addr);
// WRITING TO EEPROM
printf ("\nPerforming EEPROM Write operation\n");
write(fd,wbuf,16);
sleep(10); //till eeprom completes writes
if (write(fd,wbuf,16) != 16) {
printf("ERROR: write() failed\n");
close(fd);
return -1;
}
printf("\nSUCCESS: Data written to the EEPROM\n");
// READING FROM EEPROM
printf ("\nPerforming EEPROM Read operation\n");
wbuf[0]=0;
if(write(fd,wbuf,1)!=1){
printf("ERROR: buffer pointer initialization of read() failed\n");
}
if (read(fd,rbuf,16) != 16) {
printf("ERROR: read() failed\n");
close(fd);
return -1;
}
for(i = 0; i< 16; i++)
printf("ReadBuffer[%d] %d \r\n", i, rbuf[i]);
printf("\nSUCCESS: Data READ from the EEPROM\n");
printf("\neerprom test successfull \n");
close(fd);
}
kindly let me know what i can try for doing this
Thank you
Deepak R
