We are trying to use the ADC with HW step enable feature instead of SW step enable. For HW step enable, we are trying to use GP timer-4 as source of event to start the ADC scanning either in single shot or continuous mode. We could able to start the synchronization with SW enabled single-shot/continuous mode. But we couldn’t able to start the Scan/Synchronization using Timer HW event. Following are the steps we are doing.
1) Mode bits in STEPCONFIG registers are set to HW synchronized- one shot (tried with continuous as well)
2) HW_event_mapping bit in CTRL register is set to “1” for Maching HW event to HW event input
3) HW_Preempt bit in CTRL register is set to “1” for pre-empting the SW steps by HW event.
4) ext_hw_event signal is configured to TIMER-4 by writing the 0x001 to ADC_EVT_CAPT register.
5) We configured the timer-4 such that the initial level is LOW and then transitioned to HIGH.
With the above configuration, we expected ADC module start scanning for all the channels when timer-4 pin is transitioned from LOW to HIGH. But the observation is that scanning is not happening and we are not getting END_OF_SEQUENCE interrupt.
If any of them have any idea on this problem, please help me.
Regards
Madan
