320c6657 擦除nand失败

Allen Lee2

Intellectual 476 points

使用platform库中的nand擦除函数：

Platform_STATUS platform_device_erase_block(PLATFORM_DEVHANDLE handle,
uint32_t block_number);

擦除flash中的某一块时失败，函数没有返回Platform_EOK。请问这是什么原因？具体代码如下：

uint8_t     *buf, * buf_orig;
    uint32_t    offset;
PLATFORM_DEVICE_info *p_device;
uint32_t                i;

buf_orig = NULL;

/* Open the device */
    p_device = platform_device_open(PLATFORM_DEVID_MT29F1G08ABCHC, 0);
    if (p_device == NULL) {
       printf("test_nand: Could not open NAND device errno = 0x%x \n", platform_errno);
       goto NAND_TEST_DONE;
    }

    /* We need a buffer to read a page in */
    buf_orig = (uint8_t *) malloc(p_device->page_size);
    if (buf_orig == NULL) {
        printf("test_nand: Can't allocate %d bytes for buf_orig\n", p_device->page_size);
        goto NAND_TEST_DONE;
    }

    /* Read the test block page 0 - save the contents so we can write back */
    platform_blocknpage_to_offset(p_device->handle, &offset, args->nand_test_block_number, 0 );
    if (platform_device_read(p_device->handle, offset, buf_orig, p_device->page_size) != Platform_EOK) {
        printf("test_nand: Unable to read block %d page %d errno = 0x%x\n", args->nand_test_block_number, 0, platform_errno );
        goto NAND_TEST_DONE;
    }
    printf("buf_orig:\n");
    buf=buf_orig;
    for(i=0;i<2048;i++){
    printf("%x ",*buf++);
    }
    printf("\n");

    /* Erase our test block so we can write to it */
    if (platform_device_erase_block(p_device->handle, args->nand_test_block_number) != Platform_EOK) {
        printf("test_nand: Unable to erase (%d) block %d errno = 0x%x\n", args->nand_test_block_number, platform_errno);
        goto NAND_TEST_DONE;
    }

    /* Fill in a test pattern */
    buf=buf_orig;
    for(i=0;i<2048;i++){
    *buf++=0xd8;
    }
    buf=buf_orig;
    printf("after memset:\n");
    for(i=0;i<2048;i++){
    printf("%x ",*buf++);
    }
    printf("\n");

    /* Write the test pattern to the test block */
    platform_blocknpage_to_offset(p_device->handle, &offset, args->nand_test_block_number, 0 );
    if (platform_device_write(p_device->handle, offset, buf_orig, p_device->page_size) != Platform_EOK) {
        printf("test_nand: Unable to write (%d) block %d page %d errno = 0x%x \n", args->nand_test_block_number, 0, platform_errno);
        goto NAND_TEST_DONE;
    }
    platform_delay(1000);

    //memset(buf2, 0xff, p_device->page_size);
    platform_blocknpage_to_offset(p_device->handle, &offset, args->nand_test_block_number, 0);
    if (platform_device_read(p_device->handle, offset, buf_orig, p_device->page_size) != Platform_EOK) {
        printf("test_nand: Unable to read block %d page %d errno = 0x%x\n", args->nand_test_block_number, 0, platform_errno );
        goto NAND_TEST_DONE;
    }
    platform_delay(1000);

    printf("after read:\n");
    buf=buf_orig;
    for(i=0;i<2048;i++){
    printf("%x ",*buf++);
    }
    printf("\n");

_DONE:

if (buf_orig)
free(buf_orig);

platform_device_close(p_device->handle);

return;

设备打开、读取nand都没有报错，进行到擦除时出错了。

9 年多前