Hi, I have compiled the kernel for UDOO with the modifications from the UDOO Starting Manual(chapter 6.3). The new kernel works fine, but the problem is that I don't know where the new serial port has been mapped. I have tried with some files from /dev with cat /dev/tty... but could not see any output. I am testing with an UART GPS module. I know it is working because I can use it with PC Serial port and with Raspberry PI.
I looked at all the diagrams of the pin out and to me they make completely no sense at all . eg Uart 5 , which on page 33 of the manual say it`s on CS10_Data14 , CS10_Data15 , key_row1 & keycol1 . Looking at page 289 diagram for Uart 5 :- Uart 5 Tx which is gpio 160 ( tx2 sam ) Uart 5 Rx which is gpio 161 ( rx2 sam ) Uart 5 Rx Which is gpio 105 (d48 sam ) Uart 5 Tx Which is gpio 104 shares with sdi vesl (d49 sam) <- this must be key_col1 from :- imx6 - sam3x physical pin manual : sam rx2 :- ipu1_csio_data_15 , eimdata11 , uart_rx_data , gpio6_io01 sam tx2 :- ipu1_csio_data_14 , eimdata10 , uart_tx_data , gpio6_io00 which I can`t make much sense of because of the new alt functions given and all the pin names and gpio pin changing .