Hi all,
I am trying to change some register settings for TPS6217 (power management chip) through i2c on linux userspace.
My hope is to configure the settings using c++. I am using the kernel 3.2.33, and the i2c slave address is already binded to the driver. (seems TPS65217 specific)
I know how to use i2c drivers for general i2c, But I don know how to include and use TPS65217 driver on my code. Any ideas?
Best regards,
Hi Jin,
I am looking at this post for information and would like to ask you how to read using i2c in c++.
I have the following code for write which works fine.
txBuffer[0] = 0x2a; // location to write data
txBuffer[1] = 0xfe ; //data
opResult = write(i2cFD, txBuffer, 2); //write statement.
if (opResult !=2) printf(“No ACK bit!\n”);
I am having issues with read. I have the following code
opResult = read(i2cFD, (char*)rxBuffer, 6);
printf(“Part ID rx0: %x, %x\n”, (int)rxBuffer[0], 0x00);
printf(“Part ID rx1: %x, %x\n”, (int)rxBuffer[1], 0x01);
printf(“Part ID rx2: %x, %x\n”, (int)rxBuffer[2], 0x02);
printf(“Part ID rx3: %x, %x\n”, (int)rxBuffer[3], 0x03);
printf(“Part ID rx4: %x, %x\n”, (int)rxBuffer[4], 0x04);
printf(“Part ID rx5: %x, %x\n”, (int)rxBuffer[5], 0x05);
It prints out different values then what I expect using i2cdump
Can you shed some light on my problem?
Thanks big time.
Hi,
I am not sure exactly what issue you are experiencing, but here is my source code. Hope it helps.
Regards,
Jinsuk
batterygauge.cpp (4.66 KB)
batterygauge.h (1017 Bytes)
Hi Jinsuk,
Thank you for the support. I am a beginner myself but I will try to understand the code. My problem is if you look at (code.png) it is the code that is providing me the error. The code2 is the output that I am getting(erroneous). And code 3 is the output I should be getting. Somehow, the program is skipping even values after 0.
It would be a huge help to a beginner like me if you can glance at it and point me in the right direction.
Thanks
