probe: stlink: fix broken non-word-aligned 8-bit transfers (#1428)

pyocd · Jul 5, 2022 · b80193c · b80193c
1 parent 9724fa9
commit b80193c
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/pyocd/probe/stlink_probe.py b/pyocd/probe/stlink_probe.py
@@ -306,7 +306,7 @@ def read_memory_block8(self, addr: int, size: int, **attrs: Any) -> Sequence[int
         res = []
 
         # read leading unaligned bytes
-        unaligned_count = 4 - (addr & 3)
+        unaligned_count = addr & 3
         if (size > 0) and (unaligned_count > 0):
             res += self._link.read_mem8(addr, unaligned_count, self._apsel, csw)
             size -= unaligned_count
@@ -332,7 +332,7 @@ def write_memory_block8(self, addr: int, data: Sequence[int], **attrs: Any) -> N
         idx = 0
 
         # write leading unaligned bytes
-        unaligned_count = 4 - (addr & 3)
+        unaligned_count = addr & 3
         if (size > 0) and (unaligned_count > 0):
             self._link.write_mem8(addr, data[:unaligned_count], self._apsel, csw)
             size -= unaligned_count