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feat(ospi): add memory mapped mode

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Signed-off-by: Haobo Gu <haobogu@outlook.com>
This commit is contained in:
Haobo Gu 2024-10-25 18:27:48 +08:00
parent e5bc266654
commit 7b62d70d18
1 changed files with 48 additions and 15 deletions
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59
embassy-stm32/src/ospi/mod.rs
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@ -179,39 +179,72 @@ pub struct Ospi<'d, T: Instance, M: PeriMode> {
}
impl<'d, T: Instance, M: PeriMode> Ospi<'d, T, M> {
pub fn enable_memory_mapped_mode(&mut self) {
/// Enter memory mode.
/// The Input `TransferConfig` is used to configure the read operation in memory mode
pub fn enable_memory_mapped_mode(
&mut self,
read_config: TransferConfig,
write_config: TransferConfig,
) -> Result<(), OspiError> {
// Use configure command to set read config
self.configure_command(&read_config, None)?;
let reg = T::REGS;
while reg.sr().read().busy() {
info!("wait ospi busy");
}
reg.ccr().modify(|r| {
r.set_isize(crate::ospi::vals::SizeInBits::_8BIT);
r.set_adsize(crate::ospi::vals::SizeInBits::_24BIT);
r.set_admode(crate::ospi::vals::PhaseMode::ONELINE);
r.set_imode(crate::ospi::vals::PhaseMode::ONELINE);
r.set_dmode(crate::ospi::vals::PhaseMode::FOURLINES);
r.set_dqse(false);
r.set_sioo(true);
});
// Set wrting configurations, there are separate registers for write configurations in memory mapped mode
reg.wccr().modify(|w| {
w.set_imode(PhaseMode::from_bits(write_config.iwidth.into()));
w.set_idtr(write_config.idtr);
w.set_isize(SizeInBits::from_bits(write_config.isize.into()));
w.set_admode(PhaseMode::from_bits(write_config.adwidth.into()));
w.set_addtr(write_config.idtr);
w.set_adsize(SizeInBits::from_bits(write_config.adsize.into()));
w.set_dmode(PhaseMode::from_bits(write_config.dwidth.into()));
w.set_ddtr(write_config.ddtr);
w.set_abmode(PhaseMode::from_bits(write_config.abwidth.into()));
w.set_dqse(true);
});
reg.wtcr().modify(|w| w.set_dcyc(write_config.dummy.into()));
// Enable memory mapped mode
reg.cr().modify(|r| {
r.set_fmode(crate::ospi::vals::FunctionalMode::MEMORYMAPPED);
r.set_dmaen(false);
r.set_en(true);
r.set_tcen(false);
});
// reg.tcr().modify(|r| {
// r.set_dcyc(6);
// });
Ok(())
}
/// Quit from memory mapped mode
pub fn disable_memory_mapped_mode(&mut self) {
let reg = T::REGS;
while reg.sr().read().busy() {
info!("wait ospi busy");
}
reg.cr().modify(|r| {
r.set_fmode(crate::ospi::vals::FunctionalMode::INDIRECTWRITE);
r.set_abort(true);
r.set_dmaen(false);
r.set_en(false);
});
// Clear transfer complete flag
reg.fcr().write(|w| w.set_ctcf(true));
// Re-enable ospi
reg.cr().modify(|r| {
r.set_en(true);
});
}