Hi, Vianney,
I have developed a simple code to implement the phase shift for two PWM signal based on LPC54114, I attach the code, but you have to modify it based on the LPC4337, for example AHBCLKCTRL register for enabling gated clock and pin assignment.
Hope it can help you
BR
XiangJun Rong
//The SCT0_OUT1 can output PWM signal with 50 duty cycle from PIO0_8 pin
//The SCT_OUT2 can output PWM signal with 50 duty cycle fron PIO0_9 pin
//The SCT0_OUT1 and SCT0_OUT2 PWM signal has 90 degree phase shift.
void SCT0_PWM(void)
{
SYSCON->AHBCLKCTRL[1]|=(1<<2); //SET SCT0 bit
SCT0->CONFIG = (1 << 0) | (1 << 17); // unified 32-bit timer, auto limit
SCT0->SCTMATCHREL[0] = SystemCoreClock/100; // match 0 @ 100 Hz = 10 msec
SCT0->EVENT[0].STATE = 0xFFFFFFFF; // event 0 happens in all states
//set event1
SCT0->SCTMATCHREL[1]=0x00;
SCT0->EVENT[1].STATE = 0xFFFFFFFF; // event 1 happens in all states
SCT0->EVENT[1].CTRL = (1 << 12)|(1<<0); // match 1 condition only
//set event2
SCT0->SCTMATCHREL[2]=(SystemCoreClock/100)/2;
SCT0->EVENT[2].STATE = 0xFFFFFFFF; // event 2 happens in all states
SCT0->EVENT[2].CTRL = (1 << 12)|(2<<0); // match 2 condition only
//set event3
SCT0->SCTMATCHREL[3]=(SystemCoreClock/100)/4;
SCT0->EVENT[3].STATE = 0xFFFFFFFF; // event 3 happens in all states
SCT0->EVENT[3].CTRL = (1 << 12)|(3<<0); // match 3 condition only
//set event4
SCT0->SCTMATCHREL[4]=3*(SystemCoreClock/100)/4;
SCT0->EVENT[4].STATE = 0xFFFFFFFF; // event 4 happens in all states
SCT0->EVENT[4].CTRL = (1 << 12)|(4<<0); // match 4 condition only
//PWM output1 signal
SCT0->OUT[1].SET = (1 << 1); // event 1 will set SCT1_OUT0
SCT0->OUT[1].CLR = (1 << 2); // event 2 will clear SCT1_OUT0
SCT0->RES |= (3 << 2); // output 0 toggles on conflict
//PWM output2 signal
SCT0->OUT[2].SET = (1 << 3); // event 3 will set SCT1_OUT0
SCT0->OUT[2].CLR = (1 << 4); // event 4 will clear SCT1_OUT0
SCT0->RES = (3 << 4); // output 0 toggles on conflict
//PWM start
SCT0->CTRL &= ~(1 << 2); // unhalt by clearing bit 2 of the CTRL
}
