Content originally posted in LPCWare by sicotc on Wed Jan 20 10:17:44 MST 2016 Hello, I want to configure I2C in master mode. (lpcxpresso board LPC12) When I send start, the interrupt execute the I2C state engine. I see STAT = 0x08, (end of start) so I send Adress + W bit. I put CONCLR.STA and CONCLR.SI bit at 0 (writing 1), and I see CONCLR=0x40 (I2C enable), and STAT = 0xF8, so the processor is sending data. I can see data on SDA, but SI bit never go to 1, so I don't have any interrupt. find project archive attached. Any Idea ? Thanks,