diff options
Diffstat (limited to 'nuttx/drivers/serial/serialirq.c')
| -rw-r--r-- | nuttx/drivers/serial/serialirq.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/nuttx/drivers/serial/serialirq.c b/nuttx/drivers/serial/serialirq.c deleted file mode 100644 index fda5b4afb..000000000 --- a/nuttx/drivers/serial/serialirq.c +++ /dev/null @@ -1,186 +0,0 @@ -/************************************************************************************ - * drivers/serial/serialirq.c - * - * Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ************************************************************************************/ - -/************************************************************************************ - * Included Files - ************************************************************************************/ - -#include <nuttx/config.h> - -#include <sys/types.h> -#include <stdint.h> -#include <semaphore.h> -#include <debug.h> -#include <nuttx/serial/serial.h> - -/************************************************************************************ - * Pre-processor Definitions - ************************************************************************************/ - -/************************************************************************************ - * Private Types - ************************************************************************************/ - -/************************************************************************************ - * Private Function Prototypes - ************************************************************************************/ - -/************************************************************************************ - * Private Variables - ************************************************************************************/ - -/************************************************************************************ - * Private Functions - ************************************************************************************/ - -/************************************************************************************ - * Public Functions - ************************************************************************************/ - -/************************************************************************************ - * Name: uart_xmitchars - * - * Description: - * This function is called from the UART interrupt handler when an interrupt - * is received indicating that there is more space in the transmit FIFO. This - * function will send characters from the tail of the xmit buffer while the driver - * write() logic adds data to the head of the xmit buffer. - * - ************************************************************************************/ - -void uart_xmitchars(FAR uart_dev_t *dev) -{ - uint16_t nbytes = 0; - - /* Send while we still have data & room in the fifo */ - - while (dev->xmit.head != dev->xmit.tail && uart_txready(dev)) - { - /* Send the next byte */ - - uart_send(dev, dev->xmit.buffer[dev->xmit.tail]); - nbytes++; - - /* Increment the tail index */ - - if (++(dev->xmit.tail) >= dev->xmit.size) - { - dev->xmit.tail = 0; - } - } - - /* When all of the characters have been sent from the buffer disable the TX - * interrupt. - */ - - if (dev->xmit.head == dev->xmit.tail) - { - uart_disabletxint(dev); - } - - /* If any bytes were removed from the buffer, inform any waiters there there is - * space available. - */ - - if (nbytes) - { - uart_datasent(dev); - } -} - -/************************************************************************************ - * Name: uart_receivechars - * - * Description: - * This function is called from the UART interrupt handler when an interrupt - * is received indicating that are bytes available in the receive fifo. This - * function will add chars to head of receive buffer. Driver read() logic will - * take characters from the tail of the buffer. - * - ************************************************************************************/ - -void uart_recvchars(FAR uart_dev_t *dev) -{ - unsigned int status; - int nexthead = dev->recv.head + 1; - uint16_t nbytes = 0; - - if (nexthead >= dev->recv.size) - { - nexthead = 0; - } - - /* Loop putting characters into the receive buffer until either there are no - * further characters to available. - */ - - while (uart_rxavailable(dev)) - { - char ch = uart_receive(dev, &status); - - /* If the RX buffer becomes full, then the serial data is discarded. This is - * necessary because on most serial hardware, you must read the data in order - * to clear the RX interrupt. An option on some hardware might be to simply - * disable RX interrupts until the RX buffer becomes non-FULL. However, that - * would probably just cause the overrun to occur in hardware (unless it has - * some large internal buffering). - */ - - if (nexthead != dev->recv.tail) - { - /* Add the character to the buffer */ - - dev->recv.buffer[dev->recv.head] = ch; - nbytes++; - - /* Increment the head index */ - - dev->recv.head = nexthead; - if (++nexthead >= dev->recv.size) - { - nexthead = 0; - } - } - } - - /* If any bytes were added to the buffer, inform any waiters there there is new - * incoming data available. - */ - - if (nbytes) - { - uart_datareceived(dev); - } -} |