uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rxPin, int8_t txPin, uint16_t queueLen, bool inverted)
{
    if(uart_nr > 2) {
        return NULL;
    }

    if(rxPin == -1 && txPin == -1) {
        return NULL;
    }

    uart_t* uart = &_uart_bus_array[uart_nr];

    /*->>>>>>>THIS SECTION HAS BEEN COMMENTED DURING EXPERIMENTATION.
    #if !CONFIG_DISABLE_HAL_LOCKS
        if(uart->lock == NULL) {
            uart->lock = xSemaphoreCreateMutex();
            if(uart->lock == NULL) {
                return NULL;
            }
        }
    #endif

    if(queueLen && uart->queue == NULL) {
        uart->queue = xQueueCreate(queueLen, sizeof(uint8_t)); //initialize the queue
        if(uart->queue == NULL) {
            return NULL;
        }
    }
    if(uart_nr == 1){
        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_UART1_CLK_EN);
        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_UART1_RST);
    } else if(uart_nr == 2){
        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_UART2_CLK_EN);
        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_UART2_RST);
    } else {
        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_UART_CLK_EN);
        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_UART_RST);
    }
    uartFlush(uart);
    uartSetBaudRate(uart, baudrate);
    UART_MUTEX_LOCK();
    uart->dev->conf0.val = config;
    #define TWO_STOP_BITS_CONF 0x3
    #define ONE_STOP_BITS_CONF 0x1

    if ( uart->dev->conf0.stop_bit_num == TWO_STOP_BITS_CONF) {
        uart->dev->conf0.stop_bit_num = ONE_STOP_BITS_CONF;
        uart->dev->rs485_conf.dl1_en = 1;
    }
    UART_MUTEX_UNLOCK();
	*/


    if(rxPin != -1) {
        uartAttachRx(uart, rxPin, inverted);
    }

    if(txPin != -1) {
        uartAttachTx(uart, txPin, inverted);
    }

    addApbChangeCallback(uart, uart_on_apb_change);
    return uart;
}