HAL_ChibiOS: avoid unnecessary H7 flash writes

5 years ago · 74f33d57c5
1 changed files with 2 additions and 1 deletions
--- a/libraries/AP_HAL_ChibiOS/hwdef/common/flash.c
+++ b/libraries/AP_HAL_ChibiOS/hwdef/common/flash.c
@ -448,7 +448,8 @@ static bool stm32_flash_write_h7(uint32_t addr, const void *buf, uint32_t count)
				@@ -448,7 +448,8 @@ static bool stm32_flash_write_h7(uint32_t addr, const void *buf, uint32_t count)
    }
    stm32_flash_unlock();
    while (count >= 32) {
-        if (!stm32h7_flash_write32(addr, b)) {
+        if (memcmp((void*)addr, b, 32) != 0 &&
+            !stm32h7_flash_write32(addr, b)) {
            return false;
        }
        // check contents