Function uart_set_format

bsp/allwinner/libraries/drivers/drv_uart.c:475–532

}

static void uart_set_format(uart_port_t uart_port, uint8_t data_bits, uint8_t stop_bits, uint8_t parity)
{
    size_t uart_base;
    uint8_t lcr;

    uart_base = SUNXI_UART0_BASE + uart_port * 0x400;

    lcr = hal_readb(uart_base + UART_LCR);

    /* set word length */
    lcr &= ~(UART_LCR_DLEN_MASK);
    switch (data_bits)
    {
    case 5:
        lcr |= UART_LCR_WLEN5;
        break;
    case 6:
        lcr |= UART_LCR_WLEN6;
        break;
    case 7:
        lcr |= UART_LCR_WLEN7;
        break;
    case 8:
    default:
        lcr |= UART_LCR_WLEN8;
        break;
    }

    /* set stop bit */
    switch (stop_bits)
    {
    case 1:
    default:
        lcr &= ~(UART_LCR_STOP);
        break;
    case 2:
        lcr |= UART_LCR_STOP;
        break;
    }

    /* set parity bit */
    lcr &= ~(UART_LCR_PARITY_MASK);
    switch (parity)
    {
    case PARITY_NONE:
        lcr &= ~(UART_LCR_PARITY);
        break;
    case PARITY_ODD:
        lcr |= UART_LCR_PARITY;
        break;
    case PARITY_EVEN:
        lcr |= UART_LCR_PARITY;
        lcr |= UART_LCR_EPAR;
        break;
    }

    hal_writeb(lcr, uart_base + UART_LCR);
}