Winbond W25Q256FV无法擦除写入

通过读取status register2 判断是否CMP被设置为1

UINT8 usiStatus2Read()

{

    uint8_t volatile u8Val;

    QSPI_ClearRxFIFO(QSPI_FLASH_PORT);

    // /CS: active

    QSPI_SET_SS_LOW(QSPI_FLASH_PORT);

    // send Command: 0x05, Read status register

    QSPI_WRITE_TX(QSPI_FLASH_PORT, 0x35);

    // wait tx finish

    usiActive();

    // read status

    QSPI_WRITE_TX(QSPI_FLASH_PORT, 0x00);

    // wait tx finish

    usiActive();

    // /CS: de-active

    QSPI_SET_SS_HIGH(QSPI_FLASH_PORT);

    // skip first rx data

    u8Val = QSPI_READ_RX(QSPI_FLASH_PORT);

    u8Val = QSPI_READ_RX(QSPI_FLASH_PORT);

    return u8Val;

}

若设置为1，通过指令改写status register 2

int usiStatusWrite(UINT8 data)

{

    // Write enable

    usiWriteEnable();

    ///////////////////////////////////////

    // /CS: active

    QSPI_SET_SS_LOW(QSPI_FLASH_PORT);

    // send Command: 0x01, Write status register

    QSPI_WRITE_TX(QSPI_FLASH_PORT, 0x01);

    // wait tx finish

    usiActive();

    // write status

    QSPI_WRITE_TX(QSPI_FLASH_PORT, data);

    // wait tx finish

    usiActive();

  // write status 2

    QSPI_WRITE_TX(QSPI_FLASH_PORT, 0x02);

    // wait tx finish

    usiActive();

    // /CS: de-active

    QSPI_SET_SS_HIGH(QSPI_FLASH_PORT);

    return Successful;

}