From c9f29534d6f3fd5bcf2cee09e70667373a8dc179 Mon Sep 17 00:00:00 2001 From: huntc Date: Tue, 25 Jan 2022 16:51:24 +1100 Subject: Stop PWM before assigning the new sequence I had introduced a small bug in my last PR where I assigned the sequence before stopping the PWM. I now stop the PWM before doing that now. Also, corrected a math comment. --- examples/nrf/src/bin/pwm_sequence.rs | 2 +- examples/nrf/src/bin/pwm_sequence_ppi.rs | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'examples') diff --git a/examples/nrf/src/bin/pwm_sequence.rs b/examples/nrf/src/bin/pwm_sequence.rs index 561bc1dd1..56c865d1c 100644 --- a/examples/nrf/src/bin/pwm_sequence.rs +++ b/examples/nrf/src/bin/pwm_sequence.rs @@ -18,7 +18,7 @@ async fn main(_spawner: Spawner, p: Peripherals) { let mut config = SequenceConfig::default(); config.prescaler = Prescaler::Div128; - // 1 period is 1000 * (128/16mhz = 0.000008s = 0.008ms) = 8ms + // 1 period is 1000 * (128/16mhz = 0.000008s = 0.008ms) = 8us // but say we want to hold the value for 5000ms // so we want to repeat our value as many times as necessary until 5000ms passes // want 5000/8 = 625 periods total to occur, so 624 (we get the one period for free remember) diff --git a/examples/nrf/src/bin/pwm_sequence_ppi.rs b/examples/nrf/src/bin/pwm_sequence_ppi.rs index 213ef5ed7..f03c5716a 100644 --- a/examples/nrf/src/bin/pwm_sequence_ppi.rs +++ b/examples/nrf/src/bin/pwm_sequence_ppi.rs @@ -20,7 +20,7 @@ async fn main(_spawner: Spawner, p: Peripherals) { let mut config = SequenceConfig::default(); config.prescaler = Prescaler::Div128; - // 1 period is 1000 * (128/16mhz = 0.000008s = 0.008ms) = 8ms + // 1 period is 1000 * (128/16mhz = 0.000008s = 0.008ms) = 8us // but say we want to hold the value for 250ms 250ms/8 = 31.25 periods // so round to 31 - 1 (we get the one period for free remember) // thus our sequence takes 5 * 250ms or 1.25 seconds -- cgit