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Honored Contributor
Honored ContributorGood progress on UART
I have my Uart Working, but not perfectly, GPGGA comes from the GPS chip once a second, about every 5 seconds my UART reads it perfeclty giving my Time and position, any sugestions how to fine tune t...
Altera_ForumHonored Contributor
Honored ContributorI need your help to figure out how to connect the PC RS232 to the NIOS UART on a C III starter board. I have a daughter card that exposes the FPGA pins, so I have access physically to ALL I/O pins, Also 5 V and 3.3 V pins on that card. I also have a RS232 to TTL tiny external board that is connected to the PC Serial cable, and has 4 pins as output. The four pins are Power, GND, Tx and Rx. I tried to connect the Tx and Rx to their perspective equal Rx and Tx in the NIOS (pin assignment is correct) after I added the RS232 UART in the nios using SOPC builder, with no flow control.
I cannot send or receive on either sides, I mean Nios running c code cannot read or write, the function call stuck. Also on the PC the c code cannot read or write it does also stuck on the function call. I am using ANSI standard C code for fopen, fgetc, fputc, etc.. Can you help me please to find out how to connect the PC to the UART on the FPGA? I appreciate it. Thanks.
