AR# 66045

描述

How do I connect the UART MODEM signal to EMIO while using MIO, the IP GUI does not allow an MIO + EMIO Modem choice.

解决方案

The PS UART RX and TX signals can be routed via MIOs or EMIOs. However MODEM signals can only be routed via EMIOs.

If the user would want to route the UART TX/RX to MIO and MODEM signals to EMIO, one potential workaround is to:

• In the Processing System IP GUI, assign UART interface signals to EMIO. This will route all of the TX, RX, and MODEM signals to EMIO.
• Over-write the appropriate IOU_SLCR.MIO_PIN* registers to change the mapping of TX and RX back to MIO in the psu_init.c/psu_init.tcl files. Consider performing a difference of these files with the MIO IP GUI setting to determine the correct register value.

This issue is planned to be fixed starting in 2016.1.