求助，sscanf在串口中断卡死的现象
在ZYNQ7010的裸机下跑官方的串口例程，在串口中断里面使用sscanf，sscanf带有正则表达式时程序卡死，不带时则正常运行这是卡死的
这是不卡死的
程序源码如下：
#include "stdio.h"
#include "sleep.h"
#include "xparameters.h"
#include "xplatform_info.h"
#include "xuartps.h"
#include "xil_exception.h"
#include "xil_printf.h"
#include "xscugic.h"
#define INTC XScuGic
#define UART_DEVICE_ID XPAR_XUARTPS_1_DEVICE_ID
#define INTC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID
#define UART_INT_IRQ_ID XPAR_XUARTPS_1_INTR
#define TEST_BUFFER_SIZE 100
/************************** Function Prototypes *****************************/
int UartPsIntrExample(INTC *IntcInstPtr, XUartPs *UartInstPtr, u16 DeviceId, u16 UartIntrId);
static int SetupInterruptSystem(INTC *IntcInstancePtr, XUartPs *UartInstancePtr, u16 UartIntrId);
void Handler(void *CallBackRef, u32 Event, unsigned int EventData);
int rsscanf(const char* str, const char* format, ...);
/************************** Variable Definitions ***************************/
XUartPs UartPs ; /* Instance of the UART Device */
INTC InterruptController; /* Instance of the Interrupt Controller */
int m_uCommRxNum = 0;
static u8 SendBuffer; /* Buffer for Transmitting Data */
static u8 RecvBuffer; /* Buffer for Receiving Data */
volatile int TotalReceivedCount;
volatile int TotalSentCount;
int TotalErrorCount;
int main(void)
{
int Status;
xil_printf("start ran UART Interrupt Example Test\r\n");
Status = UartPsIntrExample(&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;
}
xil_printf("Successfully ran UART Interrupt Example Test\r\n");
return XST_SUCCESS;
}
int UartPsIntrExample(INTC *IntcInstPtr, XUartPs *UartInstPtr,
u16 DeviceId, u16 UartIntrId)
{
XUartPs_Config *Config;
int Index;
u32 IntrMask;
int Status;
Config = XUartPs_LookupConfig(DeviceId);
Status = XUartPs_CfgInitialize(UartInstPtr, Config, Config->BaseAddress);
Status = XUartPs_SelfTest(UartInstPtr);
Status = SetupInterruptSystem(IntcInstPtr, UartInstPtr, UartIntrId);
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_LOCAL_LOOP);
XUartPs_SetRecvTimeout(UartInstPtr, 8);
for (Index = 0; Index < TEST_BUFFER_SIZE; Index++)
{
SendBuffer = (Index % 26) + 'A';
RecvBuffer = 0;
}
xil_printf("success.\r\n");
Xil_ExceptionEnable();
while (1)
{
for(int i = 0; i < 666000; i++)
{
for(int j = 0; j < 1000; j++)
{
}
}
XUartPs_Send(UartInstPtr, SendBuffer, TEST_BUFFER_SIZE);
}
return Status;
}
u32 ymd = 0;
u32 hms = 0;
u32 srate = 0;
u32 slen = 0;
u32 p5;
u32 p6;
u32 p7;
void Handler(void *CallBackRef, u32 Event, unsigned int EventData)
{
/* All of the data has been sent */
if (Event == XUARTPS_EVENT_SENT_DATA) {
TotalSentCount = EventData;
}
/* All of the data has been received */
if (Event == XUARTPS_EVENT_RECV_DATA) {
TotalReceivedCount = EventData;
XUartPs_Recv(&UartPs, RecvBuffer, 200);
}
char str = "1 2 3 4 5 6 7 ";
if (Event == XUARTPS_EVENT_RECV_TOUT) {
TotalReceivedCount = EventData;
xil_printf("status is 2.\r\n");
sscanf(str,"%u% %u %u %u %u %u %u", &ymd, &hms, &srate, &slen,&p5,&p6, &p7);
xil_printf("ymd is %d.\r\n", ymd);
}
if (Event == XUARTPS_EVENT_RECV_ERROR) {
TotalReceivedCount = EventData;
TotalErrorCount++;
xil_printf("XUARTPS_EVENT_RECV_ERROR.\r\n");
}
if (Event == XUARTPS_EVENT_PARE_FRAME_BRKE) {
TotalReceivedCount = EventData;
TotalErrorCount++;
xil_printf("XUARTPS_EVENT_PARE_FRAME_BRKE.\r\n");
}
if (Event == XUARTPS_EVENT_RECV_ORERR) {
TotalReceivedCount = EventData;
TotalErrorCount++;
xil_printf("XUARTPS_EVENT_RECV_ORERR.\r\n");
}
}
static int SetupInterruptSystem(INTC *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;
}
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,(Xil_ExceptionHandler) XScuGic_InterruptHandler,
IntcInstancePtr);
Status = XScuGic_Connect(IntcInstancePtr, UartIntrId, (Xil_ExceptionHandler) XUartPs_InterruptHandler,
(void *) UartInstancePtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
XUartPs_SetHandler(UartInstancePtr, (XUartPs_Handler)Handler, UartInstancePtr);
XScuGic_Enable(IntcInstancePtr, UartIntrId);
return XST_SUCCESS;
}
C库用的那个，libc还是newlib，可以在电脑端单独测试下试试。正常的话，你这个程序放在中断外试试。 eric2013 发表于 2023-10-26 20:43
C库用的那个，libc还是newlib，可以在电脑端单独测试下试试。正常的话，你这个程序放在中断外试试。
现在用的vivado 2018.3版本，SDK保持的默认设置，所以应该是libc，这个库是ARM的我不知道怎么在电脑上跑起来，sscanf函数在中断外是正常的
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