本帖最后由 dong_abc 于 2014-5-25 01:49 编辑
我做过这个功能。 PTC4和 llwu 都设置成输入中断。PTC4下降沿唤醒单片机，同时进入llwu中断。
- void Config_pushbutton(void)
- {
- FGPIOC_PDDR &= ~(0x10); // Configure as input
-
- PORTC_PCR4 = (PORT_PCR_MUX(1)
- | PORT_PCR_PE_MASK
- | PORT_PCR_PS_MASK
- | PORT_PCR_IRQC(0xA));
-
- /* Set the ICPR and ISER registers accordingly */
- NVIC_ICPR |= (uint32)(1 << ((INT_PORTC_PORTD-16)%32));
- NVIC_ISER |= (uint32)(1 << ((INT_PORTC_PORTD-16)%32));
-
- set_irq_priority(INT_PORTC_PORTD-16, 3);
- }
- PE_ISR(Pushbutton_Interrupt)
- {
-
- if(MCM_CPO & MCM_CPO_CPOACK_MASK){
- MCM_CPO &= ~MCM_CPO_CPOREQ_MASK;
- while (MCM_CPO & MCM_CPO_CPOACK_MASK);
- }
- if ((PORTC_PCR4 & PORT_PCR_ISF_MASK) == PORT_PCR_ISF_MASK)
-
- {
- PORTC_PCR4 |= PORT_PCR_ISF_MASK;
-
- }
- }
- void low_power_init(void)
- {
- /*PTC4is configured to wake up MCU from VLLSx and LLS modes, Interrup is ne*/
- enable_irq(INT_LLW-16);
- set_irq_priority(INT_LLW-16, 1);
-
- llwu_configure(0x0100/*PTC4*/, LLWU_PIN_FALLING, 0x1);
-
- PORTC_PCR4 = PORT_PCR_PS_MASK |
- PORT_PCR_PE_MASK |
- PORT_PCR_PFE_MASK |
- PORT_PCR_IRQC(10) | /* IRQ Falling edge */
- PORT_PCR_MUX(1);
-
- enable_irq(31); //Enable GPIO interrupts on PORTC
- }
- PE_ISR(llw_isr){
-
- if (LLWU_F2 & LLWU_F2_WUF8_MASK) {
- LLWU_F2 |= LLWU_F2_WUF8_MASK; // write one to clear the flag
-
- if(mpu_time_mode) {mpu_25ms_cnt++;}
- else mpu_25ms_cnt = 0;
-
- if(sedent_monit_mode) sedent_time_cnt++;
- else sedent_time_cnt=0;
-
- }
- //***********************************************************************
- // * Note: This ISR does not write to the LLWU_F3 register because these
- // * are peripheral module wakeups. The flags contained in the LLWU_F3
- // * register should be cleared through the associated module interrupt
- // * and not through the LLWU_F3 per the Kinetis L Family Reference
- // * Manual (LLWU Chapter)
- // *********************************************************************
- if (LLWU_F3 & LLWU_F3_MWUF0_MASK) {
- SIM_SCGC5 |= SIM_SCGC5_LPTMR_MASK;
- LPTMR0_CSR |= LPTMR_CSR_TCF_MASK; // write 1 to TCF to clear the LPT timer compare flag
- LPTMR0_CSR = ( LPTMR_CSR_TEN_MASK | LPTMR_CSR_TIE_MASK | LPTMR_CSR_TCF_MASK );
- }
- if(LLWU_FILT1 & LLWU_FILT1_FILTF_MASK){
-
- LLWU_FILT1 |= LLWU_FILT1_FILTF_MASK;
- }
- if(LLWU_FILT2 & LLWU_FILT2_FILTF_MASK){
-
- LLWU_FILT2 |= LLWU_FILT2_FILTF_MASK;
- }
- NVIC_ICPR |= 1 << (LLWU_irq_no%32);
- }
| 
楼主
