Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

UART encoding issues

Hi, I am using the Cyclone V SoC UART0 and I can transmit to my PC and read strings just fine. However when I am reading the UART in my baremetal application, the received characters don't match ASCII encoding. So far it looks like this:

I send from Realterm: What I read in UART register:

'A' ------------------------0x01 0x1D

'B' ------------------------0x02 0x1D

'C' ------------------------0x03 0x1D

.

.

'Z' ------------------------0x1A 0x1D

I have no clue what kind f encoding this is and I can't map the bits in any way to actual ASCII values.

Any help appreciated!

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    SOLVED!

    OK, Altera's SoCFPGA-hardwareLib-FPGA-CV-ARMCC reference design which I was using had left the UART to use FIVE BITS PER SERIAL WORD. As I was getting all the initialization messages from the UART to the terminal just fine I assumed the source had initialized the UART all fine. But now I have set LCR[1:0] to use eight bits per word and its fine!