Add f7 computation to hal common and add tests

embassy-hal-common/src/stm32/flash/f4.rs

@@ -1,5 +1,4 @@
-pub mod f4 {
+const FLASH_BASE: u32 = 0x0800_0000;
-    const FLASH_BASE: u32 = 0x08_00_00_00;
 pub(crate) const SMALL_SECTOR_SIZE: u32 = 16 * 1024;
 pub(crate) const MEDIUM_SECTOR_SIZE: u32 = 64 * 1024;
 pub(crate) const LARGE_SECTOR_SIZE: u32 = 128 * 1024;
@@ -11,8 +10,8 @@ pub mod f4 {
     pub size: u32,
 }
 
-    pub fn get_sector(addr: u32, dual_bank: bool, flash_size: u32) -> FlashSector {
+pub fn get_sector(address: u32, dual_bank: bool, flash_size: u32) -> FlashSector {
-        let offset = addr - FLASH_BASE;
+    let offset = address - FLASH_BASE;
     if !dual_bank {
         get_single_bank_sector(offset)
     } else {
@@ -52,11 +51,10 @@ pub mod f4 {
         },
     }
 }
-}
 
 #[cfg(test)]
 mod tests {
-    use super::f4::*;
+    use super::*;
 
     #[test]
     fn can_get_sector_single_bank() {

embassy-hal-common/src/stm32/flash/f7.rs

@@ -0,0 +1,57 @@
+const FLASH_BASE: u32 = 0x0800_0000;
+pub(crate) const SMALL_SECTOR_SIZE: u32 = 32 * 1024;
+pub(crate) const MEDIUM_SECTOR_SIZE: u32 = 128 * 1024;
+pub(crate) const LARGE_SECTOR_SIZE: u32 = 256 * 1024;
+
+#[derive(Debug, PartialEq)]
+pub struct FlashSector {
+    pub index: u8,
+    pub size: u32,
+}
+
+pub fn get_sector(address: u32) -> FlashSector {
+    // First 4 sectors are 32KB, then one 128KB, and rest are 256KB
+    let offset = address - FLASH_BASE;
+    match offset / LARGE_SECTOR_SIZE {
+        0 => {
+            if offset < 4 * SMALL_SECTOR_SIZE {
+                FlashSector {
+                    index: (offset / SMALL_SECTOR_SIZE) as u8,
+                    size: SMALL_SECTOR_SIZE,
+                }
+            } else {
+                FlashSector {
+                    index: 4,
+                    size: MEDIUM_SECTOR_SIZE,
+                }
+            }
+        }
+        i => FlashSector {
+            index: 4 + i as u8,
+            size: LARGE_SECTOR_SIZE,
+        },
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn can_get_sector() {
+        let assert_sector = |index: u8, size: u32, addr: u32| assert_eq!(FlashSector { index, size }, get_sector(addr));
+
+        assert_sector(0, SMALL_SECTOR_SIZE, 0x0800_0000);
+        assert_sector(0, SMALL_SECTOR_SIZE, 0x0800_7FFF);
+        assert_sector(3, SMALL_SECTOR_SIZE, 0x0801_8000);
+        assert_sector(3, SMALL_SECTOR_SIZE, 0x0801_FFFF);
+
+        assert_sector(4, MEDIUM_SECTOR_SIZE, 0x0802_0000);
+        assert_sector(4, MEDIUM_SECTOR_SIZE, 0x0803_FFFF);
+
+        assert_sector(5, LARGE_SECTOR_SIZE, 0x0804_0000);
+        assert_sector(5, LARGE_SECTOR_SIZE, 0x0807_FFFF);
+        assert_sector(7, LARGE_SECTOR_SIZE, 0x080C_0000);
+        assert_sector(7, LARGE_SECTOR_SIZE, 0x080F_FFFF);
+    }
+}

embassy-hal-common/src/stm32/flash/mod.rs

@@ -0,0 +1,2 @@
+pub mod f4;
+pub mod f7;