TMS320F28377S: I2c bit shift

Hi JB,

With your setup your data should look something like this (But R/~W being 0 instead of 1 for write).

When you say you're using the I2C epprom library do you mean you're going off of the eeprom example in C2000Ware which uses FIFO mode? Could you share your I2C initialization code?

Thanks,

Kevin

the library file is i2c_eeprom, from  C2000Ware_1_00_01_00.

I2Cinit(){

I2caRegs.I2CSAR.all = 0x0050; // Slave address - EEPROM control code

I2caRegs.I2CPSC.all = 6; // Prescaler - need 7-12 Mhz on module clk
I2caRegs.I2CCLKL = 10; // NOTE: must be non zero
I2caRegs.I2CCLKH = 5; // NOTE: must be non zero
I2caRegs.I2CIER.all = 0x24; // Enable SCD & ARDY __interrupts

I2caRegs.I2CMDR.all = 0x0020; // Take I2C out of reset
// Stop I2C when suspended

I2caRegs.I2CFFTX.all = 0x6000; // Enable FIFO mode and TXFIFO
I2caRegs.I2CFFRX.all = 0x2040; // Enable RXFIFO, clear RXFFINT,

I2caRegs.I2CMDR.bit.FDF = 0;
I2caRegs.I2CMDR.bit.XA = 0;
}

The address write:

I2caRegs.I2CSAR.all = 0xF0;  //msg->SlaveAddress;

thanks JB

Hi JB,

I don't see an i2c_eeprom "library" within c2000ware, only example programs.

Regardless of that, could I see your I2C write function that you're having the issue with? That will give me more clarity than just the init function. Also if you could provide a screen capture of the waveform seen when writing the address to the slave.

Thanks,
Kevin

found the problem thanks

Great! Happy you discovered what was wrong.

Would you mind sharing what the problem/solution was? This could help someone else in the future that is facing the same issue.