zynq的串口中断不能触发问题

只看该作者 · 2014-1-15 15:46

zynq板，想用串口接收中断，但是完全没反应，发送的字符可以接收，但就是没有触发中断，用过串口中断的帮忙看看，是uart初始化有问题，还是gic初始化有问题啊，急

#include "../inc/UartInit.h"

static void UartInterruptHandler(void);
static int GIC_Init(void);

XUartPs UartPs;
XScuGic ScuGic;

char rec;
int Uart_Init(void)
{
int Status;
u32 u32RegBaseAddress;
XUartPs_Config *ConfigPtr;

ConfigPtr = XUartPs_LookupConfig(XPAR_PS7_UART_1_DEVICE_ID);
if (ConfigPtr == (XUartPs_Config *)NULL)
{
return XST_DEVICE_NOT_FOUND;
}
u32RegBaseAddress = ConfigPtr->BaseAddress;//
XUartPs_CfgInitialize(&UartPs, ConfigPtr, ConfigPtr->BaseAddress);  //初始化
// XUartPs_SetHandler(&UartPs, (XUartPs_Handler)UartInterruptHandler, (void *)0);
Status = GIC_Init(); //配置GIC
if (Status != XST_SUCCESS)
{
return XST_FAILURE;
}
XUartPs_WriteReg(u32RegBaseAddress, XUARTPS_RXWM_OFFSET, 1);

XUartPs_WriteReg(u32RegBaseAddress, XUARTPS_IER_OFFSET, XUARTPS_IXR_RXFULL|XUARTPS_IXR_RXOVR);    //允许接收中断
XUartPs_WriteReg(u32RegBaseAddress, XUARTPS_IDR_OFFSET, ~(XUARTPS_IXR_RXFULL|XUARTPS_IXR_RXOVR));  //允许接收中断

XUartPs_SetBaudRate(&UartPs, UART_BAUDRATE);                            //设置波特率
XUartPs_WriteReg(u32RegBaseAddress, XUARTPS_MR_OFFSET, 0x20);
XUartPs_WriteReg(u32RegBaseAddress, XUARTPS_CR_OFFSET, 0x17);

printf("0x%x\n",XUartPs_ReadReg(u32RegBaseAddress, XUARTPS_IMR_OFFSET));

return XST_SUCCESS;
}

static int GIC_Init(void)
{
int Status;

XScuGic_Config * ConfigPtr;

ConfigPtr = XScuGic_LookupConfig(XPAR_SCUGIC_0_DEVICE_ID);

Status = XScuGic_CfgInitialize(&ScuGic, ConfigPtr, ConfigPtr->CpuBaseAddress);
if (Status != XST_SUCCESS)
{
return XST_FAILURE;
}
XScuGic_Disable(&ScuGic, UART1_IRQ_ID);

XScuGic_SetPriorityTriggerType(&ScuGic, UART1_IRQ_ID, 0x2, 0x1);  //设置优先级和触发类型
XScuGic_Connect (&ScuGic, UART1_IRQ_ID, (Xil_InterruptHandler)UartInterruptHandler, (void *)0);
if (Status != XST_SUCCESS)
{
return XST_FAILURE;
}

XScuGic_Enable(&ScuGic, UART1_IRQ_ID); //允许串口中断

Xil_ExceptionInit();

Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT, (Xil_ExceptionHandler)XScuGic_InterruptHandler, &ScuGic);

Xil_ExceptionEnable();

return XST_SUCCESS;
}

static void UartInterruptHandler(void)
{
volatile u8 StatusRegister;

u32 u32RegBaseAddress;

u32RegBaseAddress = UartPs.Config.BaseAddress;

XUartPs_WriteReg(u32RegBaseAddress, XUARTPS_ISR_OFFSET, 0xffffffff);

StatusRegister = XUartPs_ReadReg(u32RegBaseAddress, XUARTPS_ISR_OFFSET);
/* enable Tx/Rx and reset Tx/Rx data path */

while(StatusRegister & (XUARTPS_SR_RXFULL | XUARTPS_SR_RXOVR))//接收
{
      if(StatusRegister & (XUARTPS_SR_RXFULL | XUARTPS_SR_RXOVR))
      {
        rec = XUartPs_ReadReg(u32RegBaseAddress, XUARTPS_FIFO_OFFSET);
      }
}

}