Refactor flash handling to different modules for different families

embassy-stm32/src/flash/l.rs

@@ -0,0 +1,185 @@
+use core::convert::TryInto;
+use core::ptr::write_volatile;
+
+use crate::flash::Error;
+use crate::pac;
+
+pub(crate) unsafe fn lock() {
+    #[cfg(any(flash_wl, flash_wb, flash_l4))]
+    pac::FLASH.cr().modify(|w| w.set_lock(true));
+
+    #[cfg(any(flash_l0))]
+    pac::FLASH.pecr().modify(|w| {
+        w.set_optlock(true);
+        w.set_prglock(true);
+        w.set_pelock(true);
+    });
+}
+
+pub(crate) unsafe fn unlock() {
+    #[cfg(any(flash_wl, flash_wb, flash_l4))]
+    {
+        pac::FLASH.keyr().write(|w| w.set_keyr(0x4567_0123));
+        pac::FLASH.keyr().write(|w| w.set_keyr(0xCDEF_89AB));
+    }
+
+    #[cfg(any(flash_l0, flash_l1))]
+    {
+        pac::FLASH.pekeyr().write(|w| w.set_pekeyr(0x89ABCDEF));
+        pac::FLASH.pekeyr().write(|w| w.set_pekeyr(0x02030405));
+
+        pac::FLASH.prgkeyr().write(|w| w.set_prgkeyr(0x8C9DAEBF));
+        pac::FLASH.prgkeyr().write(|w| w.set_prgkeyr(0x13141516));
+    }
+}
+
+pub(crate) unsafe fn blocking_write(offset: u32, buf: &[u8]) -> Result<(), Error> {
+    #[cfg(any(flash_wl, flash_wb, flash_l4))]
+    pac::FLASH.cr().write(|w| w.set_pg(true));
+
+    let ret = {
+        let mut ret: Result<(), Error> = Ok(());
+        let mut offset = offset;
+        for chunk in buf.chunks(super::WRITE_SIZE) {
+            for val in chunk.chunks(4) {
+                write_volatile(
+                    offset as *mut u32,
+                    u32::from_le_bytes(val[0..4].try_into().unwrap()),
+                );
+                offset += val.len() as u32;
+            }
+
+            ret = blocking_wait_ready();
+            if ret.is_err() {
+                break;
+            }
+        }
+        ret
+    };
+
+    #[cfg(any(flash_wl, flash_wb, flash_l4))]
+    pac::FLASH.cr().write(|w| w.set_pg(false));
+
+    ret
+}
+
+pub(crate) unsafe fn blocking_erase(from: u32, to: u32) -> Result<(), Error> {
+    for page in (from..to).step_by(super::ERASE_SIZE) {
+        #[cfg(any(flash_l0, flash_l1))]
+        {
+            pac::FLASH.pecr().modify(|w| {
+                w.set_erase(true);
+                w.set_prog(true);
+            });
+
+            write_volatile(page as *mut u32, 0xFFFFFFFF);
+        }
+
+        #[cfg(any(flash_wl, flash_wb, flash_l4))]
+        {
+            let idx = page / super::ERASE_SIZE as u32;
+
+            pac::FLASH.cr().modify(|w| {
+                w.set_per(true);
+                w.set_pnb(idx as u8);
+                #[cfg(any(flash_wl, flash_wb))]
+                w.set_strt(true);
+                #[cfg(any(flash_l4))]
+                w.set_start(true);
+            });
+        }
+
+        let ret: Result<(), Error> = blocking_wait_ready();
+
+        #[cfg(any(flash_wl, flash_wb, flash_l4))]
+        pac::FLASH.cr().modify(|w| w.set_per(false));
+
+        #[cfg(any(flash_l0, flash_l1))]
+        pac::FLASH.pecr().modify(|w| {
+            w.set_erase(false);
+            w.set_prog(false);
+        });
+
+        clear_all_err();
+        if ret.is_err() {
+            return ret;
+        }
+    }
+
+    Ok(())
+}
+
+pub(crate) unsafe fn clear_all_err() {
+    pac::FLASH.sr().modify(|w| {
+        #[cfg(any(flash_wl, flash_wb, flash_l4, flash_l0))]
+        if w.rderr() {
+            w.set_rderr(true);
+        }
+        #[cfg(any(flash_wl, flash_wb, flash_l4))]
+        if w.fasterr() {
+            w.set_fasterr(true);
+        }
+        #[cfg(any(flash_wl, flash_wb, flash_l4))]
+        if w.miserr() {
+            w.set_miserr(true);
+        }
+        #[cfg(any(flash_wl, flash_wb, flash_l4))]
+        if w.pgserr() {
+            w.set_pgserr(true);
+        }
+        if w.sizerr() {
+            w.set_sizerr(true);
+        }
+        if w.pgaerr() {
+            w.set_pgaerr(true);
+        }
+        if w.wrperr() {
+            w.set_wrperr(true);
+        }
+        #[cfg(any(flash_wl, flash_wb, flash_l4))]
+        if w.progerr() {
+            w.set_progerr(true);
+        }
+        #[cfg(any(flash_wl, flash_wb, flash_l4))]
+        if w.operr() {
+            w.set_operr(true);
+        }
+    });
+}
+
+pub(crate) unsafe fn blocking_wait_ready() -> Result<(), Error> {
+    loop {
+        let sr = pac::FLASH.sr().read();
+
+        if !sr.bsy() {
+            #[cfg(any(flash_wl, flash_wb, flash_l4))]
+            if sr.progerr() {
+                return Err(Error::Prog);
+            }
+
+            if sr.wrperr() {
+                return Err(Error::Protected);
+            }
+
+            if sr.pgaerr() {
+                return Err(Error::Unaligned);
+            }
+
+            if sr.sizerr() {
+                return Err(Error::Size);
+            }
+
+            #[cfg(any(flash_wl, flash_wb, flash_l4))]
+            if sr.miserr() {
+                return Err(Error::Miss);
+            }
+
+            #[cfg(any(flash_wl, flash_wb, flash_l4))]
+            if sr.pgserr() {
+                return Err(Error::Seq);
+            }
+
+            return Ok(());
+        }
+    }
+}