Merge pull request #11752 from mnaberez/erase-value

FlashIAP: Get erase value from HAL instead of hardcoding it

Author: 0xc0170

TESTS/mbed_drivers/flashiap/main.cpp

@@ -143,6 +143,7 @@ void flashiap_cross_sector_program_test()
     TEST_ASSERT_EQUAL_INT32(0, ret);
 
     uint32_t page_size = flash_device.get_page_size();
+    uint8_t erase_value = flash_device.get_erase_value();
 
     // Erase last two sectors
     uint32_t address = flash_device.get_flash_start() + flash_device.get_flash_size();
@@ -170,7 +171,7 @@ void flashiap_cross_sector_program_test()
         data[i] = rand() % 256;
     }
     for (uint32_t i = prog_size; i < aligned_prog_size; i++) {
-        data[i] = 0xFF;
+        data[i] = erase_value;
     }
 
     ret = flash_device.program(data, address, prog_size);

drivers/source/FlashIAP.cpp

@@ -99,6 +99,7 @@ int FlashIAP::program(const void *buffer, uint32_t addr, uint32_t size)
     uint32_t page_size = get_page_size();
     uint32_t flash_size = flash_get_size(&_flash);
     uint32_t flash_start_addr = flash_get_start_address(&_flash);
+    uint8_t flash_erase_value = flash_get_erase_value(&_flash);
     uint32_t chunk, prog_size;
     const uint8_t *buf = (uint8_t *) buffer;
     const uint8_t *prog_buf;
@@ -123,7 +124,7 @@ int FlashIAP::program(const void *buffer, uint32_t addr, uint32_t size)
             chunk = std::min(chunk, page_size);
             memcpy(_page_buf, buf, chunk);
             if (chunk < page_size) {
-                memset(_page_buf + chunk, 0xFF, page_size - chunk);
+                memset(_page_buf + chunk, flash_erase_value, page_size - chunk);
             }
             prog_buf = _page_buf;
             prog_size = page_size;