altos/micropeak-v2: Erase log space at end of BOOST_DELAY

[fw/altos] / src / stmf0 / ao_storage_stm.c

diff --git a/src/stmf0/ao_storage_stm.c b/src/stmf0/ao_storage_stm.c
index 17c934a53e5b4a06f3ec9b45c523a55c5bf5191c..c6f1defe8e67b3f8efe97a3424804e9eac470126 100644 (file)
--- a/src/stmf0/ao_storage_stm.c
+++ b/src/stmf0/ao_storage_stm.c
@@ -127,9 +127,24 @@ _ao_flash_write(uint32_t pos, void *sv, uint16_t len)
        stm_flash.cr &= ~(1 << STM_FLASH_CR_PG);
 }
 
+static bool
+ao_storage_is_erased(uint32_t pos)
+{
+       uint16_t *flash = _ao_flash_addr(pos);
+       uint32_t i = ao_storage_block >> 1;
+
+       while (i--)
+               if (*flash++ != 0xffff)
+                       return false;
+       return true;
+}
+
 uint8_t
 ao_storage_erase(uint32_t pos)
 {
+       if (ao_storage_is_erased(pos))
+               return 1;
+
        ao_arch_block_interrupts();
        ao_flash_unlock();