TPS65217 chip i2c register setting

[Jin]

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,

[priya...@gmail.com]

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.

[Jinsuk Seo]

Hi,

I am not sure exactly what issue you are experiencing, but here is my source code. Hope it helps.

Regards,

Jinsuk

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Jinsuk Seo

Embedded Device Engineer

Morgan Solar Inc.
100 Symes Rd, Unit 100A Toronto, ON   M6N 0A8, Canada        

Phone: (416) 203-1655 | Fax: (416) 203-2805 | jinsu...@morgansolar.com

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[Priyank Shah]

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

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Regards,

Priyank Shah