在中断里放上OSSemPost ()发送信号量后,程序运正就不正常了, 明显的不对就是OSTimeDlyHMSM()都无效了, 任务执行频繁，还请高手指点一二。
我用的是STM32F103VE,架的是UCOS系统, 原来键了两个任务，一个是LCD显示，一个是键键处理，运行的没有错。后来加了I2C任务，配合I2C中断读取外部ADC芯片数据，只要是在I2C中断中加入OSSemPos- void I2C2_EV_IRQHandler(void)
- {
- OS_CPU_SR cpu_sr;
- OS_ENTER_CRITICAL();
- OSIntNesting++;
- OS_EXIT_CRITICAL();
- switch (I2C_GetLastEvent(I2C2))
- {
- case I2C_EVENT_MASTER_MODE_SELECT: /* EV5 */
- OSSemPost (I2CAckSem);
- // Master Receiver -------------------------------------------------
- // Send slave Address for read
- I2C_Send7bitAddress(I2C2, LTC2453_ADDR, I2C_Direction_Receiver);
- break;
- // Master Receiver -------------------------------------------------------
- // Test on I2C2 EV6 and clear them /* EV6 */
- case I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED:
- // ENABLE I2C2 acknowledgement
- I2C_AcknowledgeConfig(I2C2, ENABLE);
- break;
- // Test on I2C2 EV7 and clear it
- case I2C_EVENT_MASTER_BYTE_RECEIVED: /* EV7 */
- // Store I2C1 received data
- ADCValueUnion.ADCR[ CycDec1(7, I2CPortStruct.ADC_Channel) ][I2CPortStruct.Rx1_Idx--] = I2C_ReceiveData(I2C2);
- // Disable ACK and send I2C1 STOP condition before receiving the last data
- if(I2CPortStruct.Rx1_Idx == 0)
- {
- // Disable I2C2 acknowledgement
- I2C_AcknowledgeConfig(I2C2, DISABLE);
- // Send I2C2 STOP Condition
- I2C_GenerateSTOP(I2C2, ENABLE);
- }
- else OSSemPost (I2CReceiveSem);
- break;
- case I2C_EVENT_SLAVE_ACK_FAILURE: /* EV3_2 */
- I2C_GenerateSTOP(I2C2, ENABLE);
- break;
- default: break;
- }
- OSIntExit();
- }
在I2C中断中加入OSSemPost ()的位置是/* EV5 */，查看是否起始位发送成功。接收这个信号量的是处理I2C的任务。
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