CCS/TMS570LS1227: I2C-Communication with interrupts

Simon Schnider

Part Number: TMS570LS1227
Other Parts Discussed in Thread: HALCOGEN

Tool/software: Code Composer Studio

Is there any example project for I2C-Communication with interrupts in master mode (I'm working with a TMS570LS12x and HALCoGen)?
At the moment I use the I2C communication interface in polling mode. It works, but sometimes I have problems with the blocking-loops in the send function (while ((i2c->STR & (uint32)I2C_TX_INT) == 0U)) and in the receive function (while ((i2c->STR & (uint32)I2C_RX_INT) == 0U)). I don't like this loops and would like to change to interrupt mode. An example would be very helpful for me.

Thanks, and best regards

Simon

over 8 years ago

0 QJ Wang over 8 years ago

TI__Guru**** 192716 points

Hello Simon,

1. Enable I2C interrupt: channel 66 in VIM

2. Enable the I2C RX interrupt (ICRRDY)

3. The example is to use loopback mode for testing:

void main(void)

{

uint32 buf_size = bsize;

uint8 *t_buff = &TX_PACK[0];

uint8 *r_buff = &RX_PACK[0];

_enable_interrupt_();

i2cInit();

i2cSetOwnAdd(i2cREG1,own_add);

i2cEnableLoopback(i2cREG1);

i2cReceive(i2cREG1, 16, r_buff);

i2cSetStart(i2cREG1);

while(buf_size--)

{

i2cSendByte(i2cREG1,*t_buff++);

}

i2cClearSCD(i2cREG1);

i2cDisableNotification(i2cREG1, I2C_RX_INT);

while(1);

}

Regards,

uint8 TX_PACK[bsize]={'H','E','R','C','U','L','E','S','M','I','C','R','O','-','T','I'};

uint8 RX_PACK[bsize]={0};

uint32 data;