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sample/flash: update sample usage for flash erase operation

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Demonstrated sequence of flash API calls to show write and erase
operations with the use of flash_write_protection_set API.

Jira: ZEP-383
Change-Id: I36e5b94519dbdf424dcfbcf7f38e5cf6437da7b8
Signed-off-by: Kuo-Lang Tseng <kuo-lang.tseng@intel.com>
This commit is contained in:
ktseng 2016-05-23 17:17:40 -07:00 • committed by Anas Nashif
commit 256efc40a8
1 changed files with 22 additions and 9 deletions
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31
samples/drivers/spi_flash/src/main.c
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@ -36,7 +36,8 @@ void main(void)
struct device *flash_dev;
uint8_t buf[TEST_DATA_LEN];
PRINT("SPI flash testing!\n");
PRINT("\nW25QXXDV SPI flash testing\n");
PRINT("==========================\n");
flash_dev = device_get_binding("W25QXXDV");
@ -45,31 +46,43 @@ void main(void)
return;
}
/* Write protection needs to be disabled in w25qxxdv flash before
* each write or erase. This is because the flash component turns
* on write protection automatically after completion of write and
* erase operations.
*/
PRINT("\nTest 1: Flash erase\n");
flash_write_protection_set(flash_dev, false);
if (flash_erase(flash_dev,
FLASH_TEST_REGION_OFFSET,
FLASH_SECTOR_SIZE) != 0) {
PRINT(" Flash erase failed!\n");
} else {
PRINT(" Flash erase succeeded!\n");
}
flash_erase(flash_dev, FLASH_TEST_REGION_OFFSET, FLASH_SECTOR_SIZE);
PRINT("\nTest 2: Flash write\n");
flash_write_protection_set(flash_dev, false);
buf[0] = TEST_DATA_BYTE_0;
buf[1] = TEST_DATA_BYTE_1;
PRINT(" Attempted to write %x %x\n", buf[0], buf[1]);
if (flash_write(flash_dev, FLASH_TEST_REGION_OFFSET, buf,
TEST_DATA_LEN) != 0) {
PRINT("flash write failed!\n");
PRINT(" Flash write failed!\n");
return;
}
PRINT("data written %x %x\n", buf[0], buf[1]);
if (flash_read(flash_dev, FLASH_TEST_REGION_OFFSET, buf,
TEST_DATA_LEN) != 0) {
PRINT("flash read failed!\n");
PRINT(" Flash read failed!\n");
return;
}
PRINT("data read %x %x\n", buf[0], buf[1]);
PRINT(" Data read %x %x\n", buf[0], buf[1]);
if ((buf[0] == TEST_DATA_BYTE_0) && (buf[1] == TEST_DATA_BYTE_1)) {
PRINT("data read matches with data written. Good!!\n");
PRINT(" Data read matches with data written. Good!!\n");
} else {
PRINT("data read does not match with data written!!\n");
PRINT(" Data read does not match with data written!!\n");
}
}