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Using Uartlite v1.02

jesusmgonzalez


Hi everybody,

I'm trying to run a simple example of using a custom UART IP, i.e., Uartlite v1.02 in Xilinx SDK, with interrupts. The problem arises when I want to connect the interrupt pin from the Uart IP to the PS, such as I can run the demo program titled "xuartlite_intr_example.c".

I already added a physical loopback, but i don't know if it is necessary to add an "axi interrupt IP controller" to my design.

Thanks in advance,

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  • 0 in reply to jesusmgonzalez

    Looks like the uartlite example does not support the PS Interrupt controller. If you look at the uartns550 ('full uart') example it has a test to see if it is using the axi interrupt controller (then it looks for xintc.h) otherwise it defaults to using the PS interrupt controller and looks for "xscugic.h". The uartlite interrupt example code does not have the check for the axi interrupt.

     

    From the uartns550 interrupt example code:

     
    /***************************** Include Files **********************************/

#include "xparameters.h"
#include "xuartns550.h"
#include "xil_exception.h"

#ifdef XPAR_INTC_0_DEVICE_ID
#include "xintc.h"
#include <stdio.h>
#else
#include "xscugic.h"
#include "xil_printf.h"
#endif


/************************** Constant Definitions ******************************/

/*
 * The following constants map to the XPAR parameters created in the
 * xparameters.h file. They are defined here such that a user can easily
 * change all the needed parameters in one place.
 */
#ifndef TESTAPP_GEN
#define UART_DEVICE_ID  XPAR_UARTNS550_0_DEVICE_ID
#define UART_IRPT_INTR  XPAR_INTC_0_UARTNS550_0_VEC_ID

#ifdef XPAR_INTC_0_DEVICE_ID
#define INTC_DEVICE_ID  XPAR_INTC_0_DEVICE_ID
#else
#define INTC_DEVICE_ID  XPAR_SCUGIC_SINGLE_DEVICE_ID
#endif /* XPAR_INTC_0_DEVICE_ID */
#endif /* TESTAPP_GEN */
     
     
    So it looks like you can switch to the 'full' axi uart or add the axi interrupt controller if you want to stay with the uart lite and use the example code.
     
    -Gary
  • 0 in reply to Former Member

    Thanks for the answer. But, Should I do anything plus in the XPS Project? How do I connect the Interrupt line, and more important, to what?