topic Re: LPC812 does not handle STOP after ACK in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC812-does-not-handle-STOP-after-ACK/m-p/522552#M5188 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by remcopoelstra on Thu Nov 27 06:38:54 MST 2014</STRONG><BR /><SPAN>I think I've found a solution for this problem.</SPAN><BR /><SPAN>If I write 0xff to the data register, then the LPC812 tries to send a high level while the master toggles SDA from low to high for the STOP condition, so the master wins in this case.</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:40:03 GMT lpcware 2016-06-15T16:40:03Z LPC812 does not handle STOP after ACK https://community.nxp.com/t5/LPC-Microcontrollers/LPC812-does-not-handle-STOP-after-ACK/m-p/522551#M5187 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by remcopoelstra on Thu Nov 27 03:56:03 MST 2014</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>It seems that when the master-receiver sends an ACK and then a STOP, the LPC812 I2C controller signals a SLVPENDING interrupt and pulls down the SDA line.</SPAN><BR /><SPAN>Since I know the transaction should end, as the byte count is known, I instruct the slave control register to send back NACK's for SLVPENDING interrupts that I don't epxect.</SPAN><BR /><SPAN>How can I make sure that the I2C Controller handles the STOP after the ACK?</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><BR /><SPAN>Remco Poelstra</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:40:02 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC812-does-not-handle-STOP-after-ACK/m-p/522551#M5187 lpcware 2016-06-15T16:40:02Z Re: LPC812 does not handle STOP after ACK https://community.nxp.com/t5/LPC-Microcontrollers/LPC812-does-not-handle-STOP-after-ACK/m-p/522552#M5188 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by remcopoelstra on Thu Nov 27 06:38:54 MST 2014</STRONG><BR /><SPAN>I think I've found a solution for this problem.</SPAN><BR /><SPAN>If I write 0xff to the data register, then the LPC812 tries to send a high level while the master toggles SDA from low to high for the STOP condition, so the master wins in this case.</SPAN></BODY></HTML> Wed, 15 Jun 2016 16:40:03 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC812-does-not-handle-STOP-after-ACK/m-p/522552#M5188 lpcware 2016-06-15T16:40:03Z