adc/f3: fix startup bug

2023-09-11 17:27:47 -05:00 · 2023-09-11 17:27:47 -05:00 · 44a5c32ea4
commit 44a5c32ea4
parent b9889ad3b5
1 changed files with 3 additions and 0 deletions
--- a/embassy-stm32/src/adc/f3.rs
+++ b/embassy-stm32/src/adc/f3.rs
@ -49,6 +49,9 @@ impl<'d, T: Instance> Adc<'d, T> {

        while T::regs().cr().read().adcal() {}

+        // Wait more than 4 clock cycles after adcal is cleared (RM0364 p. 223)
+        delay.delay_us(6 * Self::freq().0 / 1_000_000);
+
        // Enable the adc
        T::regs().cr().modify(|w| w.set_aden(true));