Custom waveform generation in two pins

Question

Hello, 
 Considering the waveforms in the following chart, which will be the best approach to keep the power consumption as low as possible? 
 Specifically, which peripheral is suggested (i.e. pwm, timer, ppi)? 
 The two (2) waveform are identical, except for the delay between (0 to 2ms). 
 Thanks

haakonsh · Accepted Answer

Hu Lao said: In this case, how can I set the first pulse (in PIN1) with the correct width? 
 True, I think your approach is correct, but I think you still need the initial condition of the GPIOTE pin in order for the toggle to work as intended. 
 Hu Lao said: 
 
 The COMPARE[3] is not toggling the PIN1 
 The COMPARE[3] is not clearing the RTC. If I change the task from COMPARE[3] to

You have to use RTC1 or RTC2. See: 
 Registers

Table 4. Instances

Base address 
 Peripheral 
 Instance 
 Description 
 Configuration

0x4000B000 
 RTC 
 RTC0 
 
 Real-time counter 0

CC[0..2] implemented, CC[3] not implemented

0x40011000 
 RTC 
 RTC1 
 
 Real-time counter 1

CC[0..3] implemented

0x40024000 
 RTC 
 RTC2 
 
 Real-time counter 2

CC[0..3] implemented

Dmitry · Answer

You can configure RTC to clear with the end of second channel pulse and set initial level to 0 for both channels, so your sequence will be aligned to the end of period (there will be some delay before the first pulse though)

Custom waveform generation in two pins

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