Writing to multiple UARTlites

I have 3 UARTlites set up in Vivado and being accessed through my carrier card JD PMOD connector (6 pins Tx/Rx). The base addresses of the 3 UARTs are 0x42C00000, 0x42C10000, and 0x42C20000. I know how to select the stdin/stdout in SDK through BSP settings but how do I dynamically set stdin/stdout in my code. I saw there may be a way using "freopen" but don't know what I would put in the first field. For example freopen( ?? , 'r',stdin);

0 Former Member over 10 years ago

I don't think freopen changes the stdin/stdout as you are trying to do. Why not just use multiple instances of the Xilinx UART driver code, one for each UART. If you open the system.mss file (under your bsp in the SDK Project Explorer pane) you should see a list of your implemented peripherials. Click the 'examples' link to the right of your UART and take a look at the example code for configuring and using the UARTs.

-Gary
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