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STM32H7: Allow PLL1 DIVP of 1 for certain series

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This commit is contained in:
Oliver Rockstedt 2023-12-15 11:42:58 +01:00 committed by Dario Nieuwenhuis
parent 958b3c6de1
commit 2cc9fea6d3
1 changed files with 7 additions and 2 deletions
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9
embassy-stm32/src/rcc/h.rs
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@ -70,7 +70,9 @@ pub struct Pll {
pub mul: PllMul, pub mul: PllMul,
/// PLL P division factor. If None, PLL P output is disabled. /// PLL P division factor. If None, PLL P output is disabled.
/// On PLL1, it must be even (in particular, it cannot be 1.) /// On PLL1, it must be even for most series (in particular,
/// it cannot be 1 in series other than STM32H723/733,
/// STM32H725/735 and STM32H730.)
pub divp: Option<PllDiv>, pub divp: Option<PllDiv>,
/// PLL Q division factor. If None, PLL Q output is disabled. /// PLL Q division factor. If None, PLL Q output is disabled.
pub divq: Option<PllDiv>, pub divq: Option<PllDiv>,
@ -729,9 +731,12 @@ fn init_pll(num: usize, config: Option<Pll>, input: &PllInput) -> PllOutput {
let p = config.divp.map(|div| { let p = config.divp.map(|div| {
if num == 0 { if num == 0 {
// on PLL1, DIVP must be even. // on PLL1, DIVP must be even for most series.
// The enum value is 1 less than the divider, so check it's odd. // The enum value is 1 less than the divider, so check it's odd.
#[cfg(not(pwr_h7rm0468))]
assert!(div.to_bits() % 2 == 1); assert!(div.to_bits() % 2 == 1);
#[cfg(pwr_h7rm0468)]
assert!(div.to_bits() % 2 == 1 || div.to_bits() == 0);
} }
vco_clk / div vco_clk / div