Content originally posted in LPCWare by goweol on Mon Mar 30 02:57:58 MST 2015 mmap /dev/mem and accessing the I2C data register gave me a fault. Here is a linux command line log:
As you can see, I cannot read '0x400a0000' (I2Cn rx data fifo register). How I can access I2Cn rx/tx data FIFO register (as superuser)? Does it possible?
NOTE: 'md' internally mmaps pagesize aligned address with multiple pagesize size (based on command line dump size) and dump the given address with given size..
Content originally posted in LPCWare by vikhyathk on Mon Oct 19 22:08:48 MST 2015 I am facing a problem with i2C transmission using LPC3250. I m using processor to interface FPGA with device id 0xA0. So the first data I put into '0x400a8000' (I2C2_TX) register is 0x1A0 and I see in the oscilloscope that start condition is generated and acknowledgement is present.
But Whenever I send a data byte later with LSB bit '1', the same data is being resent with LSB bit made '0'. Example: If I put "11011001' into the register '0x400a8000' (I2C2_TX) Data found in scope is ["11011001" 'Ack bit' "11011000"'Ack bit'].. 'Ack bit' is '0'.
Content originally posted in LPCWare by goweol on Mon Mar 30 17:11:02 MST 2015 It seems I made a mistake. In the user manual, I found: "If the RX FIFO is read while empty, a DATA ABORT exception is generated"
