I'm trying to use SCT2 to trigger the ADC and am having no luck. Here is the initialization code that I'm using:
// LPC_SCT2->CONFIG |= 0; // 16-bit timer
LPC_SCT2->CONFIG |= (1 << 18); // 16-bit timer, auto limit high
LPC_SCT2->CTRL_H |= (64 << 5); // Pre-scaler & halt H timer
// LPC_SCT2->LIMIT_H |= (1 << 0); // Event 0 limit high
LPC_SCT2->MATCHREL[0].H = 5000 - 1; // match 0 @ 200 Hz = 5 msec, toggle will make it 100 Hz, 10ms
LPC_SCT2->MATCH[0].H = 5000 - 1; // match 0 @ 200 Hz = 5 msec
LPC_SCT2->EVENT[0].STATE = 0xFFFF; // event 0 happens in all states
LPC_SCT2->EVENT[0].CTRL = (0 << 0) | // Match 0
(1 << 4) | // High counter
(1 << 12); // match condition only
LPC_SCT2->EVEN = (1 << 0); // enable event 0 interrupt
NVIC_EnableIRQ(SCT2_IRQn);
LPC_SCT2->OUT[3].SET = (1 << 0); // event 0 will set SCT2_OUT3
LPC_SCT2->OUT[3].CLR = (1 << 0); // event 0 will clear SCT2_OUT3
LPC_SCT2->RES = (3 << 6); // output 3 toggles on conflict
LPC_SCT2->OUT[0].SET = (1 << 0); // event 0 will set SCT2_OUT0
LPC_SCT2->OUT[0].CLR = (1 << 0); // event 0 will clear SCT2_OUT0
LPC_SCT2->RES = (3 << 6) | (3 << 0); // output 0 toggles on conflict
// Output SCT_OUT0 on PIO2_3, pin 76
/* SCT1_OUT0, SCT1_OUT1, SCT1_OUT2, SCT2_OUT0 */
LPC_SWM->PINASSIGN[8] = 0x43FFFFFFUL;
LPC_SCT2->CTRL_H &= ~SCT_CTRL_HALT_L; // un-halt
// after everything is setup, enable the ADC
Chip_ADC_SetupSequencer(LPC_ADC0, ADC_SEQA_IDX,
(ADC_SEQ_CTRL_CHANSEL(BOARD_ADC_TEMP_INT) |
ADC_SEQ_CTRL_CHANSEL(BOARD_ADC_TEMP_TOP) |
ADC_SEQ_CTRL_CHANSEL(BOARD_ADC_36V_POWERSUPPLY) |
ADC_SEQ_CTRL_CHANSEL(BOARD_ADC_36V_BATTERY) |
ADC_SEQ_CTRL_CHANSEL(BOARD_ADC_MOTOR_CURRENT) |
ADC0_SEQ_CTRL_HWTRIG_SCT2_OUT3 | // User SCT2 OUT[3] for trigger
ADC_SEQ_CTRL_MODE_EOS |
ADC_SEQ_CTRL_SEQ_ENA));
I'm getting the interrupt for Event[0] but it seems that OUT[3] is not toggling. I can't look at OUT[3], the SWM only allows SCT2_OUT[0-2] to go to pins, and the ADC only allows SCT2_OUT[3-4] to trigger, so I set up OUT[0] to operate in the same way and I don't get an output for OUT[0].
I'm obviously missing something, if any one can help me out I would appreciate it.
