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Merge pull request #2237 from badrbouslikhin/main

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stm32/rcc: make h7 rm0399 power supply configurable
This commit is contained in:
Dario Nieuwenhuis 2023-12-03 22:47:34 +00:00 committed by GitHub
commit 696c703b8c
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1 changed files with 127 additions and 6 deletions
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125
embassy-stm32/src/rcc/h.rs
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@ -117,6 +117,75 @@ impl From<TimerPrescaler> for Timpre {
}
}
/// Power supply configuration
/// See RM0433 Rev 4 7.4
#[cfg(any(pwr_h7rm0399, pwr_h7rm0455, pwr_h7rm0468))]
#[derive(PartialEq)]
pub enum SupplyConfig {
/// Default power supply configuration.
/// V CORE Power Domains are supplied from the LDO according to VOS.
/// SMPS step-down converter enabled at 1.2V, may be used to supply the LDO.
Default,
/// Power supply configuration using the LDO.
/// V CORE Power Domains are supplied from the LDO according to VOS.
/// LDO power mode (Main, LP, Off) will follow system low-power modes.
/// SMPS step-down converter disabled.
LDO,
/// Power supply configuration directly from the SMPS step-down converter.
/// V CORE Power Domains are supplied from SMPS step-down converter according to VOS.
/// LDO bypassed.
/// SMPS step-down converter power mode (MR, LP, Off) will follow system low-power modes.
DirectSMPS,
/// Power supply configuration from the SMPS step-down converter, that supplies the LDO.
/// V CORE Power Domains are supplied from the LDO according to VOS
/// LDO power mode (Main, LP, Off) will follow system low-power modes.
/// SMPS step-down converter enabled according to SDLEVEL, and supplies the LDO.
/// SMPS step-down converter power mode (MR, LP, Off) will follow system low-power modes.
SMPSLDO(SMPSSupplyVoltage),
/// Power supply configuration from SMPS supplying external circuits and potentially the LDO.
/// V CORE Power Domains are supplied from voltage regulator according to VOS
/// LDO power mode (Main, LP, Off) will follow system low-power modes.
/// SMPS step-down converter enabled according to SDLEVEL used to supply external circuits and may supply the LDO.
/// SMPS step-down converter forced ON in MR mode.
SMPSExternalLDO(SMPSSupplyVoltage),
/// Power supply configuration from SMPS supplying external circuits and bypassing the LDO.
/// V CORE supplied from external source
/// SMPS step-down converter enabled according to SDLEVEL used to supply external circuits and may supply the external source for V CORE .
/// SMPS step-down converter forced ON in MR mode.
SMPSExternalLDOBypass(SMPSSupplyVoltage),
/// Power supply configuration from an external source, SMPS disabled and the LDO bypassed.
/// V CORE supplied from external source
/// SMPS step-down converter disabled and LDO bypassed, voltage monitoring still active.
SMPSDisabledLDOBypass,
}
/// SMPS step-down converter voltage output level.
/// This is only used in certain power supply configurations:
/// SMPSLDO, SMPSExternalLDO, SMPSExternalLDOBypass.
#[cfg(any(pwr_h7rm0399, pwr_h7rm0455, pwr_h7rm0468))]
#[derive(PartialEq)]
pub enum SMPSSupplyVoltage {
V1_8,
V2_5,
}
#[cfg(any(pwr_h7rm0399, pwr_h7rm0455, pwr_h7rm0468))]
impl SMPSSupplyVoltage {
/// Convert SMPSSupplyVoltage to u8 representation.
fn to_u8(&self) -> u8 {
match self {
SMPSSupplyVoltage::V1_8 => 0b01,
SMPSSupplyVoltage::V2_5 => 0b10,
}
}
}
/// Configuration of the core clocks
#[non_exhaustive]
pub struct Config {
@ -144,6 +213,9 @@ pub struct Config {
pub timer_prescaler: TimerPrescaler,
pub voltage_scale: VoltageScale,
pub ls: super::LsConfig,
#[cfg(any(pwr_h7rm0399, pwr_h7rm0455, pwr_h7rm0468))]
pub supply_config: SupplyConfig,
}
impl Default for Config {
@ -177,6 +249,9 @@ impl Default for Config {
timer_prescaler: TimerPrescaler::DefaultX2,
voltage_scale: VoltageScale::Scale0,
ls: Default::default(),
#[cfg(any(pwr_h7rm0399, pwr_h7rm0455, pwr_h7rm0468))]
supply_config: SupplyConfig::Default,
}
}
}
@ -195,12 +270,58 @@ pub(crate) unsafe fn init(config: Config) {
});
#[cfg(any(pwr_h7rm0399, pwr_h7rm0455, pwr_h7rm0468))]
{
match config.supply_config {
SupplyConfig::Default => {
PWR.cr3().modify(|w| {
// hardcode "Direct SPMS" for now, this is what works on nucleos with the
// default solderbridge configuration.
w.set_sdlevel(0b00);
w.set_sdexthp(false);
w.set_sden(true);
w.set_ldoen(true);
w.set_bypass(false);
});
}
SupplyConfig::LDO => {
PWR.cr3().modify(|w| {
w.set_sden(false);
w.set_ldoen(true);
w.set_bypass(false);
});
}
SupplyConfig::DirectSMPS => {
PWR.cr3().modify(|w| {
w.set_sdexthp(false);
w.set_sden(true);
w.set_ldoen(false);
w.set_bypass(false);
});
}
SupplyConfig::SMPSLDO(ref smps_supply_voltage)
| SupplyConfig::SMPSExternalLDO(ref smps_supply_voltage)
| SupplyConfig::SMPSExternalLDOBypass(ref smps_supply_voltage) => {
PWR.cr3().modify(|w| {
w.set_sdlevel(smps_supply_voltage.to_u8());
w.set_sdexthp(matches!(
config.supply_config,
SupplyConfig::SMPSExternalLDO(_) | SupplyConfig::SMPSExternalLDOBypass(_)
));
w.set_sden(true);
w.set_ldoen(matches!(
config.supply_config,
SupplyConfig::SMPSLDO(_) | SupplyConfig::SMPSExternalLDO(_)
));
w.set_bypass(matches!(config.supply_config, SupplyConfig::SMPSExternalLDOBypass(_)));
});
}
SupplyConfig::SMPSDisabledLDOBypass => {
PWR.cr3().modify(|w| {
w.set_sden(false);
w.set_ldoen(false);
w.set_bypass(true);
});
}
}
}
// Validate the supply configuration. If you are stuck here, it is
// because the voltages on your board do not match those specified