Diff: IAP_STM32F4.cpp

Revision:

11:937bd817d5bf

Parent:

9:7e19f12b81b4

Child:

12:fd6a08b46228

--- a/IAP_STM32F4.cpp	Mon Apr 11 20:01:05 2016 +0900
+++ b/IAP_STM32F4.cpp	Tue Apr 12 15:09:09 2016 +0000
@@ -89,14 +89,14 @@
 
 int IAP::blank_check( int start, int end )
 {
-    if (start >= FLASH_SECTOR_TOTAL || end >= FLASH_SECTOR_TOTAL) {
+    if (start > end || start >= FLASH_SECTOR_TOTAL || end >= FLASH_SECTOR_TOTAL) {
         return INVALID_SECTOR;
     } 
     static const int offset[8+1] = {0x00000, 0x04000, 0x08000, 0xc000, 0x10000, 0x20000, 0x40000, 0x60000, 0x80000};
-    uint8_t* p = reinterpret_cast<uint8_t*>(FLASH_BASE + offset[start]);
-    uint8_t* e = reinterpret_cast<uint8_t*>(FLASH_BASE + offset[end + 1]);
-    while(p < e) {
-        if (*p++ != 0x00) {
+    uint8_t* it = reinterpret_cast<uint8_t*>(FLASH_BASE + offset[start]);
+    uint8_t* it_end = reinterpret_cast<uint8_t*>(FLASH_BASE + offset[end + 1]);
+    for(; it != it_end; it++) {
+        if (*it != 0xff) {
             return SECTOR_NOT_BLANK;
         }
     }