I cannot get the i2c demos in SDK 2.5.0 working for the LPC8N04 (OM40002) demo board.
I have confirmed that I can successfully flash other applications and modify both the polling and interrupt demos with printf statements that indicate they fail to establish an i2c connection via pins 1, 3 and 7 (GND) on P4. I have also tested with 2, 4 and 8 on P3.
Are these demos working for NXP engineers?
Here is my set up:
Any ideas? See attached for what I understand to be P4 1, 3, 5 and 7, circled in red with pin headers soldered on. I have tried this across 4x different OM40002 boards, no luck.
Solved! Go to Solution.
Like Paul mentioned, there's some issue in the LPC8N04DEV board design, there's no external pull-up on the I2C pins.
Have a nice day!