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Parallel output of 8bits

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I have found working solution. But for me it look ugly.

    uint8_t command = 0x55;
    uint16_t u16Temp = 0;
    u16Temp = GPIO_ReadOutputData(GPIOA)&0xFF00;
    u16Temp |=  command;
    GPIO_Write(GPIOA, u16Temp);

Is there better way to output 8bit value to PORTA without affecting other pins?

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