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kpainter's avatar
kpainter
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11 months ago

Nios 2 uart initialization problem

I am using Quartus Lite 22.1.2. I am using the lightweight uart core. It is initialized by the alt_sys_init function and declares an object called uart_0. My problem is this object seems to be get...
Nios Cpu
kpainter's avatar
kpainter
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11 months ago

Thank you for the quick answer. I had wondered about that so we tried the avalon uart and the same thing happens. Let me explain what we are trying to do and maybe there is a better way. We are trying to use this embedded console found here:
https://github.com/bradschl/embedded-c-debug-console

We have a getc function defined as below:

int console_getc(void * console_hint)
{
(void) console_hint;
int ret = ECDC_GETC_EOF;

if (uart_0.rx_start != uart_0.rx_end)
{
ret = intel_lw_uart_read(&uart_0, xferbuf, 1, 0x4000);
ret = xferbuf[0];
}
return ret;
}
Here is where the uart_0 is not recognized as it is being removed. This is happening with the avalon uart as well as I mentioned. I can see that the uart_0 struct is being filled with received characters from the isr but I am not able to get them out. Perhaps there is a better method of doing what I am attempting? Thank you for the assistance!
Regards,
Kelly Painter