aminpix
Advanced Member level 4
I am trying to develop a simple UART interrupt code based on PS on Zynq. The plan is when the Zynq receives any character from RX_UART, take it and send it back to the TX_UART line.
It has to be with interrupt.
It looks very simple buy almost weeks I cant find solution for it.
Anyone can help me! This code doesn't do anything!
Here is my code.
It has to be with interrupt.
It looks very simple buy almost weeks I cant find solution for it.
Anyone can help me! This code doesn't do anything!
Here is my code.
C:
#include <stdio.h>
#include "xparameters.h"
#include "xil_printf.h"
#include "xuartps.h"
#include "xscugic.h"
#define UART_DEVICE_ID XPAR_XUARTPS_0_DEVICE_ID
#define INTC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID
#define UART_INT_IRQ_ID XPAR_XUARTPS_1_INTR
#define RECV_BUFFER_SIZE 3
XUartPs UartPs ; /* Instance of the UART Device */
static XScuGic InterruptController; /* Instance of the Interrupt Controller */
int UartIntrInit(XScuGic *IntcInstPtr, XUartPs *UartInstPtr, u16 DeviceId, u16 UartIntrId);
static int SetupInterruptSystem(XScuGic *IntcInstancePtr, XUartPs *UartInstancePtr, u16 UartIntrId);
void UARTHandler(void *CallBackRef, u32 Event, unsigned int EventData);
static u8 RecvBuffer[RECV_BUFFER_SIZE]; /* Buffer for Receiving Data */
int main(void)
{
int Status;
Status = UartIntrInit(&InterruptController, &UartPs, UART_DEVICE_ID, UART_INT_IRQ_ID);
if (Status != XST_SUCCESS)
{
xil_printf("UART Interrupt Example Test Failed\r\n");
return XST_FAILURE;
}
while(1);
return 0;
}
int UartIntrInit(XScuGic *IntcInstPtr, XUartPs *UartInstPtr, u16 DeviceId, u16 UartIntrId)
{
int Status;
XUartPs_Config *Config;
u32 IntrMask;
/*
* Initialize the UART driver so that it's ready to use
* Look up the configuration in the config table, then initialize it.
*/
Config = XUartPs_LookupConfig(DeviceId);
if (NULL == Config) {
return XST_FAILURE;
}
Status = XUartPs_CfgInitialize(UartInstPtr, Config, Config->BaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/* Check hardware build */
Status = XUartPs_SelfTest(UartInstPtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Connect the UART to the interrupt subsystem such that interrupts
* can occur. This function is application specific.
*/
Status = SetupInterruptSystem(IntcInstPtr, UartInstPtr, UartIntrId);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Setup the handlers for the UART that will be called from the
* interrupt context when data has been sent and received, specify
* a pointer to the UART driver instance as the callback reference
* so the handlers are able to access the instance data
*/
XUartPs_SetHandler(UartInstPtr, (XUartPs_Handler)UARTHandler, UartInstPtr);
/*
* Enable the interrupt of the UART so interrupts will occur, setup
* a local loopback so data that is sent will be received.
*/
IntrMask =
XUARTPS_IXR_TOUT | XUARTPS_IXR_PARITY | XUARTPS_IXR_FRAMING |
XUARTPS_IXR_OVER | XUARTPS_IXR_TXEMPTY | XUARTPS_IXR_RXFULL |
XUARTPS_IXR_RXOVR;
XUartPs_SetInterruptMask(UartInstPtr, IntrMask);
XUartPs_SetOperMode(UartInstPtr, XUARTPS_OPER_MODE_NORMAL);
/*
* Set the receiver timeout. If it is not set, and the last few bytes
* of data do not trigger the over-water or full interrupt, the bytes
* will not be received. By default it is disabled.
*
* The setting of 8 will timeout after 8 x 4 = 32 character times.
* Increase the time out value if baud rate is high, decrease it if
* baud rate is low.
*/
XUartPs_SetRecvTimeout(UartInstPtr, 8);
return XST_SUCCESS;
}
static int SetupInterruptSystem(XScuGic *IntcInstancePtr, XUartPs *UartInstancePtr, u16 UartIntrId)
{
int Status;
XScuGic_Config *IntcConfig; /* Config for interrupt controller */
/* Initialize the interrupt controller driver */
IntcConfig = XScuGic_LookupConfig(INTC_DEVICE_ID);
if (NULL == IntcConfig) {
return XST_FAILURE;
}
Status = XScuGic_CfgInitialize(IntcInstancePtr, IntcConfig,
IntcConfig->CpuBaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Connect the interrupt controller interrupt handler to the
* hardware interrupt handling logic in the processor.
*/
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler) XScuGic_InterruptHandler,
IntcInstancePtr);
/*
* Connect a device driver handler that will be called when an
* interrupt for the device occurs, the device driver handler
* performs the specific interrupt processing for the device
*/
Status = XScuGic_Connect(IntcInstancePtr, UartIntrId,
(Xil_ExceptionHandler) XUartPs_InterruptHandler,
(void *) UartInstancePtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/* Enable the interrupt for the device */
XScuGic_Enable(IntcInstancePtr, UartIntrId);
/* Enable interrupts */
Xil_ExceptionEnable();
return XST_SUCCESS;
}
void UARTHandler(void *CallBackRef, u32 Event, unsigned int EventData)
{
XUartPs_Recv(&UartPs, RecvBuffer, RECV_BUFFER_SIZE);
XUartPs_Send(&UartPs, RecvBuffer, 1);
//make sure the TX buffer is empty
while (XUartPs_IsSending(&UartPs));
}
