uartfax.c

手机底层驱动程序

 * Returns  : Number of bytes sent.
 *
 ******************************************************************************/

static SYS_UWORD16
send_break (t_uart *uart)
{
    SYS_UWORD16 bytes_in_tx_fifo;

    bytes_in_tx_fifo = 0;
    uart->break_in_progress = 1;


    dev_Uart_setLineControlRegister(UAF_UART_1, dev_Uart_getLineControlRegister(UAF_UART_1) | BREAK_CONTROL);
      
    while (uart->break_length) {
        dev_Uart_setTransmitHoldingRegister(UAF_UART_1, 0x00);
        uart->break_length--;
        bytes_in_tx_fifo++;
    }

    return (bytes_in_tx_fifo);
}

/*******************************************************************************
 *
 *                              start_receiver
 * 
 * Purpose  : Deactivates DTR or RTS or sends XON.
 *
 * Arguments: In : uart: Pointer on the UART structure.
 *            Out: none
 *
 * Returns  : none
 *
 ******************************************************************************/

static void
start_receiver (T_tr_UartId uartNo)
{
	unsigned char mcRegister;
	
	if(UAF_GetPortType(uartNo) == UA_TYPE_UART)
		{
		mcRegister = dev_Uart_getModemControlRegister(UAF_UART_1);
		dev_Uart_setModemControlRegister(UAF_UART_1, mcRegister|MRTS);
		}
}

/*******************************************************************************
 *
 *                              stop_receiver
 * 
 * Purpose  : Activates DTR or RTS or sends XOFF. 
 *
 * Arguments: In : uart: Pointer on the UART structure.
 *            Out: none
 *
 * Returns  : none
 *
 ******************************************************************************/

static void
stop_receiver (T_tr_UartId uartNo)
{
	unsigned char mcRegister;
	
	if(UAF_GetPortType(uartNo) == UA_TYPE_UART)
		{
		mcRegister = dev_Uart_getModemControlRegister(UAF_UART_1);
		dev_Uart_setModemControlRegister(UAF_UART_1, mcRegister&~MRTS);
		}

}


/*******************************************************************************
 *
 *                              compute_break_time
 * 
 * Purpose  : Computes a number of TDMA from 3 parameters:
 *              - baudrate,
 *              - bits per character including start bit, stop bits and parity,
 *              - number of characters.
 *            Due to the TDMA value (4.6 ms), a minimal value is sent: 2 TDMA.
 *
 * Arguments: In : baudrate
 *                 bits_per_char
 *                 number_of_chars
 *            Out: none
 *
 * Returns  : The number of TDMA.
 *
 ******************************************************************************/

static UNSIGNED
compute_break_time (UNSIGNED baudrate,
                    UNSIGNED bits_per_char,
                    UNSIGNED number_of_chars)
{
    UNSIGNED number_of_tdma;

    number_of_tdma = CONVERT_TIME_IN_TDMA (
                         1000 * bits_per_char * number_of_chars / baudrate);

    if (number_of_tdma == 0)
        number_of_tdma = 1;

    number_of_tdma++;

    return (number_of_tdma);
}


/*******************************************************************************
 *
 *                          update_reading_callback
 * 
 * Purpose  : Updates the sizes array and the addresses array and get and builds
 *            the state parameter defined in UAF_GetLineState to call the
 *            readOutFunc function.
 *
 * Arguments: In : uart       : Pointer on the UART structure.
 *                 call_source: 0: application, 1: HISR (Rx or V24), 3: Rx HISR
 *            Out: none
 *
 * Returns  : none
 *
 ******************************************************************************/

static void
update_reading_callback (t_uart *uart,
                         SYS_BOOL call_source)
{
    SYS_UWORD32  state;

    SYS_UWORD8  fragments_number;
    SYS_UWORD16 bytes_in_rx_buffer;
    volatile SYS_UWORD8 *rx_in;

    /*
     * Update the sizes array and the addresses array.
     * A copy of rx_in is used because it may be updated by the interrupt
     * handler if this function is called from the application.
     */

    rx_in = uart->rx_in;
    
    if (uart->rx_out < rx_in) {

        fragments_number = 1;

        uart->rd_address[0] = uart->rx_out;
        uart->rd_size_before_call[0] = (SYS_UWORD16) (rx_in - uart->rx_out);
        uart->rd_size_after_call[0] = uart->rd_size_before_call[0];

        uart->rd_size_before_call[1] = 0;
        uart->rd_size_after_call[1] = 0;

        bytes_in_rx_buffer = uart->rd_size_before_call[0];

    } else if (rx_in == uart->rx_out) { /* RX buffer empty. */
        
        fragments_number = 1;

        uart->rd_address[0] = uart->rx_out;
        uart->rd_size_before_call[0] = 0;
        uart->rd_size_after_call[0] = 0;

        uart->rd_size_before_call[1] = 0;
        uart->rd_size_after_call[1] = 0;

        bytes_in_rx_buffer = 0;
                    
    } else {
    
        fragments_number = 2;

        uart->rd_address[0] = uart->rx_out;
        uart->rd_size_before_call[0] =
            uart->buffer_size + 1 - (SYS_UWORD16) (uart->rx_out -
                                               &(uart->rx_buffer[0]));
        uart->rd_size_after_call[0] = uart->rd_size_before_call[0];

        uart->rd_address[1] = &(uart->rx_buffer[0]);
        uart->rd_size_before_call[1] = (SYS_UWORD16) (rx_in -
                                                  &(uart->rx_buffer[0]));
        uart->rd_size_after_call[1] = uart->rd_size_before_call[1];

        bytes_in_rx_buffer =
            uart->rd_size_before_call[0] + uart->rd_size_before_call[1];

        if (!uart->rd_size_before_call[1])
            fragments_number = 1;
    }

    /*
     * Build the state parameter defined in UAF_GetLineState.
     * The field state_2 is used when state_1 is set to 0 to avoid to
     * lose events detected in the RX interrupt handler.
     */


    state = uart->state_2;
    uart->state_2 = 0;
    uart->state = &(uart->state_2);

    state |= uart->state_1;
    uart->state_1 = 0;
    uart->state = &(uart->state_1);

    state |= ((((SYS_UWORD32) uart->rts_level) << RTS) |


              (((SYS_UWORD32) (uart->tx_stopped_by_application  |
                         uart->tx_stopped_by_driver)) << TXSTP) |

              (((SYS_UWORD32) (uart->rx_stopped_by_application  |
                         uart->rx_stopped_by_driver)) << RXSTP) |

              (((SYS_UWORD32) (uart->buffer_size - bytes_in_rx_buffer)) << RXBLEV));

    /*
     * Fields SA, SB and X are set according to the flow control:
     *
     *       None    RTS/CTS    XON/XOFF
     * SA    DTR     DTR        DTR
     * SB    RTS     0          RTS
     * X     0       RTS        XON:0 XOFF:1 (transmitter)
     *
     * DTR is supported on C, D & E-Sample.
     */

    if (uart->flow_control_mode != fc_rts)
        state |= (((SYS_UWORD32) uart->rts_level) << SB);

    if (uart->flow_control_mode == fc_rts)
        state |= (((SYS_UWORD32) uart->rts_level) << X);
            
    else if ((uart->flow_control_mode == fc_xoff) &&
             (uart->tx_stopped_by_application ||
              uart->tx_stopped_by_driver))
        state |= (1 << X);

    /*
     * Call the readOutFunc function with these parameters.
     */

    uart->rd_call_setup = rm_notDefined;

if(UAF_GetPortType(USB_MODEM+1) == UA_TYPE_USB)
{
    uart->rd_call_from_hisr_in_progress = 1;

     uart->reading_suspended = 0;
}
    (*(uart->readOutFunc)) (call_source & 0x01, /* From HISR or application */
                            &(uart->rd_call_setup),
                            fragments_number,
                            &(uart->rd_address[0]),
                            &(uart->rd_size_after_call[0]),
                            state);
}

/*******************************************************************************
 *
 *                          update_writing_callback
 * 
 * Purpose  : Updates the sizes array and the addresses array to call the
 *            writeInFunc function.
 *
 * Arguments: In : uart      : Pointer on the UART structure.
 *                 call_source: 0: application, 1: HISR
 *            Out: none
 *
 * Returns  : none
 *
 ******************************************************************************/

static void
update_writing_callback (t_uart *uart,
                         SYS_BOOL call_source)
{
    SYS_UWORD8 fragments_number;
    volatile SYS_UWORD8 *tx_out;


    tx_out = uart->tx_out;
    
	if (uart->tx_in < tx_out) 
		{
        fragments_number = 1;

        uart->wr_address[0] = uart->tx_in;
        uart->wr_size_before_call[0] =
            (SYS_UWORD16) (tx_out - uart->tx_in - 1);
        uart->wr_size_after_call[0] = uart->wr_size_before_call[0];

        uart->wr_size_before_call[1] = 0;
        uart->wr_size_after_call[1] = 0;
                                    
		} 
	else if (tx_out == &(uart->tx_buffer[0]))
		{
        fragments_number = 1;
        
        uart->wr_address[0] = uart->tx_in;
        uart->wr_size_before_call[0] =
            uart->buffer_size - 
            (SYS_UWORD16) (uart->tx_in - &(uart->tx_buffer[0]));
        uart->wr_size_after_call[0] = uart->wr_size_before_call[0];

        uart->wr_size_before_call[1] = 0;
        uart->wr_size_after_call[1] = 0;
		}
	else 
		{
        fragments_number = 2;

        uart->wr_address[0] = uart->tx_in;
        uart->wr_size_before_call[0] =
            uart->buffer_size + 1 - 
            (SYS_UWORD16) (uart->tx_in - &(uart->tx_buffer[0]));
        uart->wr_size_after_call[0] = uart->wr_size_before_call[0];

        uart->wr_address[1] = &(uart->tx_buffer[0]);
        uart->wr_size_before_call[1] =
            (SYS_UWORD16) (tx_out - &(uart->tx_buffer[0]) - 1);
        uart->wr_size_after_call[1] = uart->wr_size_before_call[1];

        if (!uart->wr_size_before_call[1])
            fragments_number = 1;
    }


    uart->wr_call_setup = rm_notDefined;


if(UAF_GetPortType(USB_MODEM+1) == UA_TYPE_USB)
{
	uart->wr_call_from_hisr_in_progress = 1;
}
	
	if(uart->writeInFunc)
    (*(uart->writeInFunc)) (call_source,
                            &(uart->wr_call_setup),
                            fragments_number,
                            &(uart->wr_address[0]),
                            &(uart->wr_size_after_call[0]));
}

/*******************************************************************************
 *
 *                          get_bytes_in_rx_buffer
 * 
 * Purpose  : Gets the number of bytes in the RX buffer.
 *
 * Arguments: In : uart: Pointer on the UART structure.
 *            Out: none
 *
 * Returns  : The number of bytes in the RX buffer.
 *
 ******************************************************************************/

static SYS_UWORD16
get_bytes_in_rx_buffer (t_uart *uart)
{
    SYS_UWORD16 bytes_in_rx_buffer;
    volatile SYS_UWORD8 *rx_in;

    rx_in = uart->rx_in;

    if (uart->rx_out <= rx_in)
        bytes_in_rx_buffer = (SYS_UWORD16) (rx_in - uart->rx_out);
    else
        bytes_in_rx_buffer =
            (SYS_UWORD16) (rx_in - uart->rx_out + uart->buffer_size + 1);

    return (bytes_in_rx_buffer);
}

/*******************************************************************************
 *
 *                          get_bytes_in_tx_buffer
 * 
 * Purpose  : Gets the number of bytes in the TX buffer.
 *
 * Arguments: In : uart: Pointer on the UART structure.
 *            Out: none
 *
 * Returns  : The number of bytes in the TX buffer.
 *
 ******************************************************************************/

static SYS_UWORD16
get_bytes_in_tx_buffer (t_uart *uart)
{
    SYS_UWORD16 bytes_in_tx_buffer;
    volatile SYS_UWORD8 *tx_out;

    tx_out = uart->tx_out;

    if (tx_out <= uart->tx_in)
        bytes_in_tx_buffer = (SYS_UWORD16) (uart->tx_in - tx_out);
    else
        bytes_in_tx_buffer =
            (SYS_UWORD16) (uart->tx_in - tx_out + uart->buffer_size + 1);

    return (bytes_in_tx_buffer);
}

/*******************************************************************************
 *
 *                          hisr_start_break
 * 
 * Purpose  : Enables the timer used to control the time without character.
 *
 * Arguments: In : none
 *            Out: none
 *
 * Returns  : none
 *
 ******************************************************************************/

static VOID