Content originally posted in LPCWare by sipiyou on Thu May 15 05:18:59 MST 2014
Dear All,
I got a small issue with the wakeup.
This is the the relevant part of the code. It does not matter what sleep mode I use, the cpu will not wakeup properly. Can someone tell me what I am doing wrong ?! the can-bus part works fine on both channels on regular operation.
void myinit_can (void) {
PINSEL_ConfigPin (0, 0, 1); // CAN-RD P0.0
PINSEL_ConfigPin (0, 1, 1); // CAN-TX P0.1
PINSEL_ConfigPin (0, 2, 1); // U0-TXD
PINSEL_ConfigPin (0, 3, 1); // U0-RXD
PINSEL_ConfigPin (2, 7, 1); // CAN-RD2 P2.7
PINSEL_ConfigPin (2, 8, 1); // CAN-TX2 P2.8
CAN_Init (CAN_ID_1, 500000);
CAN_Init (CAN_ID_2, 500000);
CAN_IRQCmd (CAN_ID_1, CANINT_RIE, ENABLE);
CAN_IRQCmd (CAN_ID_2, CANINT_RIE, ENABLE);
CAN_SetAFMode (CAN_ACC_BP);
NVIC_EnableIRQ (CAN_IRQn);
NVIC_EnableIRQ (CANActivity_IRQn); /* enable CAN activity interrupt */
}
void CANActivity_IRQHandler (void) {
canactflag = 1;
LPC_SC->CANSLEEPCLR = CAN1SLEEPCLR | CAN2SLEEPCLR;
LPC_CAN1->MOD =
LPC_CAN2->MOD &= ~ CAN_MOD_SM;
LPC_SC->CANWAKEFLAGS = CAN_WAKEFLAGES_CAN1WAKE | CAN_WAKEFLAGES_CAN2WAKE;
}
int main(void) {
startup:
SystemInit();
led_status (LED_INIT);
#ifdef DEBUG_ON
myinit_uart();
d_printf_P ("speed: %ld\n", CLKPWR_GetCLK(CLKPWR_CLKTYPE_CPU));
d_printf_P ("\nTimeStart:%ld\n", SysTickCnt);
#endif
myinit_can();
init_timer();
led_status (LED_ON);
#ifdef DEBUG_ON
d_printf_P ("speed: %ld\n", CLKPWR_GetCLK(CLKPWR_CLKTYPE_CPU));
d_printf_P ("\nTimeStart:%ld\n", SysTickCnt);
#endif
StartTime = SysTickCnt;
canactflag = 0;
while (1) {
if (canactflag) {
canactflag = 0;
can_sleep = 0;
goto startup;
/*
SystemInit();
led_status (LED_INIT);
myinit_uart();
init_timer();
StartTime = SysTickCnt;
clear_timer (_1000MS_);
wait_for_timer (_1000MS_);
d_printf_P ("wakeup!\n");
*/
}
if (can_sleep > CAN_SLEEP_BIAS) {
d_printf_P ("enter sleep\n");
clear_timer (_1000MS_);
wait_for_timer (_1000MS_);
// my_deinit_can();
// led_status (LED_OFF);
// CLKPWR_Sleep();
CLKPWR_PowerDown();
}
}
return 0 ;
}
