LPC2368 UART RX interferes with I2C TX.

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by Lapoic on Mon Oct 21 08:31:34 MST 2013
I am sending data on all three I2C channels. I am sending & receiving data on UART1 & UART2. Sometimes a character received on a UART causes an I2C transmission to fail. I tried disabling interrupts on the UARTs so that the processor would not be affected by the incomming UART data, but the problem still happens. To fix it I had to set the UART RX pin to GPIO. So it appears that the UARTs are directly interfereing with the I2C. Anybody seen a problem like this?