diff --git a/embassy-stm32/src/flash/g0.rs b/embassy-stm32/src/flash/g0.rs new file mode 100644 index 000000000..60ff1abf1 --- /dev/null +++ b/embassy-stm32/src/flash/g0.rs @@ -0,0 +1,115 @@ +use core::convert::TryInto; +use core::ptr::write_volatile; +use core::sync::atomic::{fence, Ordering}; + +use cortex_m::interrupt; + +use super::{FlashRegion, FlashSector, FLASH_REGIONS, WRITE_SIZE}; +use crate::flash::Error; +use crate::pac; + +pub const fn is_default_layout() -> bool { + true +} + +pub const fn get_flash_regions() -> &'static [&'static FlashRegion] { + &FLASH_REGIONS +} + +pub(crate) unsafe fn lock() { + pac::FLASH.cr().modify(|w| w.set_lock(true)); +} +pub(crate) unsafe fn unlock() { + // Wait, while the memory interface is busy. + while pac::FLASH.sr().read().bsy() {} + + // Unlock flash + pac::FLASH.keyr().write(|w| w.set_keyr(0x4567_0123)); + pac::FLASH.keyr().write(|w| w.set_keyr(0xCDEF_89AB)); +} + +pub(crate) unsafe fn enable_blocking_write() { + assert_eq!(0, WRITE_SIZE % 4); + pac::FLASH.cr().write(|w| w.set_pg(true)); +} + +pub(crate) unsafe fn disable_blocking_write() { + pac::FLASH.cr().write(|w| w.set_pg(false)); +} + +pub(crate) unsafe fn blocking_write(start_address: u32, buf: &[u8; WRITE_SIZE]) -> Result<(), Error> { + let mut address = start_address; + for val in buf.chunks(4) { + write_volatile(address as *mut u32, u32::from_le_bytes(val.try_into().unwrap())); + address += val.len() as u32; + + // prevents parallelism errors + fence(Ordering::SeqCst); + } + + wait_ready_blocking() +} + +pub(crate) unsafe fn blocking_erase_sector(sector: &FlashSector) -> Result<(), Error> { + let idx = (sector.start - super::FLASH_BASE as u32) / super::BANK1_REGION.erase_size as u32; + while pac::FLASH.sr().read().bsy() {} + clear_all_err(); + + interrupt::free(|_| { + pac::FLASH.cr().modify(|w| { + w.set_per(true); + w.set_pnb(idx as u8); + w.set_strt(true); + }); + }); + + let ret: Result<(), Error> = wait_ready_blocking(); + pac::FLASH.cr().modify(|w| w.set_per(false)); + ret +} + +pub(crate) unsafe fn wait_ready_blocking() -> Result<(), Error> { + while pac::FLASH.sr().read().bsy() {} + + let sr = pac::FLASH.sr().read(); + + if sr.progerr() { + return Err(Error::Prog); + } + + if sr.wrperr() { + return Err(Error::Protected); + } + + if sr.pgaerr() { + return Err(Error::Unaligned); + } + + Ok(()) +} + +pub(crate) unsafe fn clear_all_err() { + pac::FLASH.sr().modify(|w| { + if w.progerr() { + w.set_progerr(true); + } + if w.pgserr() { + w.set_pgserr(true); + } + if w.rderr() { + w.set_rderr(true); + } + if w.optverr() { + w.set_optverr(true); + } + if w.sizerr() { + w.set_sizerr(true); + } + if w.pgaerr() { + w.set_pgaerr(true); + } + if w.wrperr() { + w.set_wrperr(true); + } + }); +} diff --git a/embassy-stm32/src/flash/mod.rs b/embassy-stm32/src/flash/mod.rs index f44ef2c16..4308037f2 100644 --- a/embassy-stm32/src/flash/mod.rs +++ b/embassy-stm32/src/flash/mod.rs @@ -63,10 +63,11 @@ impl FlashRegion { #[cfg_attr(flash_f3, path = "f3.rs")] #[cfg_attr(flash_f4, path = "f4.rs")] #[cfg_attr(flash_f7, path = "f7.rs")] +#[cfg_attr(flash_g0, path = "g0.rs")] #[cfg_attr(flash_h7, path = "h7.rs")] #[cfg_attr( not(any( - flash_l0, flash_l1, flash_l4, flash_wl, flash_wb, flash_f0, flash_f3, flash_f4, flash_f7, flash_h7 + flash_l0, flash_l1, flash_l4, flash_wl, flash_wb, flash_f0, flash_f3, flash_f4, flash_f7, flash_g0, flash_h7 )), path = "other.rs" )]