I2C slave cannot trigger STOP

[ann_lee]

Posted on December 27, 2007 at 16:11

I2C slave cannot trigger STOP

[ann_lee]

Posted on August 28, 2007 at 05:31

Hi

I have a problem. I cannot get stop event trigger when I2C slave is transmitter. But ok if I2C slave is receiver. After ''I2C_EVENT_SLAVE_ACK_FAILURE'' trigger, and I send ''I2C_SendData(0xFF);'' I get a event trigger said I2C_SR1 = 0xB8 and I2C_SR2 = 0. And I found SDA line cannot be controlled when master send STOP. Below is a part of my code in 75x_it.c. Almost same as sample code. void I2C_IRQHandler(void) { switch (I2C_GetLastEvent()) { case I2C_EVENT_SLAVE_ADDRESS_MATCHED: RX_ptr = 0; break; case I2C_EVENT_SLAVE_BYTE_RECEIVED: RX_rbuf[RX_ptr++] = I2C_ReceiveData(); break; case I2C_EVENT_SLAVE_BYTE_TRANSMITTED: I2C_SendData(RX_wbuf[RX_ptr++]); break; case I2C_EVENT_SLAVE_ACK_FAILURE: I2C_SendData(0xFF); break; case I2C_EVENT_SLAVE_STOP_DETECTED: break; default: break; } } Appreciate any comment. An

[ann_lee]

Posted on August 29, 2007 at 00:03

Hi

Now it work well!! I changed master. Before... All my event responses is same as below from somebody using ARM9 http://mcu.st.com/mcu/modules.php?mop=modload&name=Splatt_Forums&file=viewtopic&topic=5061&forum=21 I cannot get STOP event trigger. I used two GPIO pin as sw I2C master. And set hw I2C as slave. In the face it work well when master send data (hw I2C (slave) as receiver). I can get all event trigger include addr, byte RX and stop. When master get data from slave, only STOP event cannot trigger. Then I changed another external master device, it work well. An

[ucoskun]

Posted on December 27, 2007 at 16:11

Hello,

I have a problem with STR752 slave operation. Your and my interrupt routines are same. But I think my code doesn't occur I2C interrupt. Can you please send me I2C configuration (main) code. Thank you in advance. Happy new year 2008. Best regards. Ugur