I solved the problem.
When I use oscilloscope to debug.I found the reason.I missed the groud PIN on sub-20 to connect to TDCMX .
Thanks for your timely response.
Search found 2 matches
- Sat Dec 18, 2010 12:09 am
- Forum: SUB-20 General Discussion
- Topic: i2c error,can't find the slave device
- Replies: 2
- Views: 13423
- Fri Dec 17, 2010 12:38 am
- Forum: SUB-20 General Discussion
- Topic: i2c error,can't find the slave device
- Replies: 2
- Views: 13423
i2c error,can't find the slave device
I configure the I2C/SPI board As master and talk to another slave device(TDCMX).But I can not find the slave device. 1.i2c scan 2 found 0 slave dev However,I use TDCMX-PU as a master.It can communicate with the slave device normally.I want to know If there is some initialization with Sub-20 I missed...