Donny9 commented on a change in pull request #1767:
URL: https://github.com/apache/incubator-nuttx/pull/1767#discussion_r487632144
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File path: arch/sim/src/sim/up_uart.c
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@@ -0,0 +1,570 @@
+/****************************************************************************
+ * arch/sim/src/sim/up_uart.c
+ *
+ * Copyright (C) 2007-2009, 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gn...@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 <nuttx/serial/serial.h>
+#include <nuttx/fs/ioctl.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include "up_internal.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define BUFSIZE 256
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct tty_priv_s
+{
+ /* tty-port path name */
+
+ FAR const char *path;
+
+ /* The file descriptor. It is returned by open */
+
+ int fd;
+};
+
+#if defined(USE_DEVCONSOLE) || CONFIG_SIM_UART_NUMBER > 0
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static int tty_setup(FAR struct uart_dev_s *dev);
+static void tty_shutdown(FAR struct uart_dev_s *dev);
+static int tty_attach(FAR struct uart_dev_s *dev);
+static void tty_detach(FAR struct uart_dev_s *dev);
+static int tty_ioctl(FAR struct file *filep, int cmd,
+ unsigned long arg);
+static int tty_receive(FAR struct uart_dev_s *dev, uint32_t *status);
+static void tty_rxint(FAR struct uart_dev_s *dev, bool enable);
+static bool tty_rxavailable(FAR struct uart_dev_s *dev);
+static void tty_send(FAR struct uart_dev_s *dev, int ch);
+static void tty_txint(FAR struct uart_dev_s *dev, bool enable);
+static bool tty_txready(FAR struct uart_dev_s *dev);
+static bool tty_txempty(FAR struct uart_dev_s *dev);
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const struct uart_ops_s g_tty_ops =
+{
+ .setup = tty_setup,
+ .shutdown = tty_shutdown,
+ .attach = tty_attach,
+ .detach = tty_detach,
+ .ioctl = tty_ioctl,
+ .receive = tty_receive,
+ .rxint = tty_rxint,
+ .rxavailable = tty_rxavailable,
+ .send = tty_send,
+ .txint = tty_txint,
+ .txready = tty_txready,
+ .txempty = tty_txempty,
+};
+#endif
+
+#ifdef USE_DEVCONSOLE
+static char g_console_rxbuf[BUFSIZE];
+static char g_console_txbuf[BUFSIZE];
+#endif
+
+#ifdef CONFIG_SIM_UART0_NAME
+static char g_tty0_rxbuf[BUFSIZE];
+static char g_tty0_txbuf[BUFSIZE];
+#endif
+
+#ifdef CONFIG_SIM_UART1_NAME
+static char g_tty1_rxbuf[BUFSIZE];
+static char g_tty1_txbuf[BUFSIZE];
+#endif
+
+#ifdef CONFIG_SIM_UART2_NAME
+static char g_tty2_rxbuf[BUFSIZE];
+static char g_tty2_txbuf[BUFSIZE];
+#endif
+
+#ifdef CONFIG_SIM_UART3_NAME
+static char g_tty3_rxbuf[BUFSIZE];
+static char g_tty3_txbuf[BUFSIZE];
+#endif
+
+#ifdef USE_DEVCONSOLE
+static struct uart_dev_s g_console_dev =
+{
+ .isconsole = true,
+ .ops = &g_tty_ops,
+ .xmit =
+ {
+ .size = BUFSIZE,
+ .buffer = g_console_txbuf,
+ },
+ .recv =
+ {
+ .size = BUFSIZE,
+ .buffer = g_console_rxbuf,
+ },
+};
+#endif
+
+#ifdef CONFIG_SIM_UART0_NAME
+static struct tty_priv_s g_tty0_priv =
+{
+ .path = CONFIG_SIM_UART0_NAME,
+ .fd = -1,
+};
+
+static struct uart_dev_s g_tty0_dev =
+{
+ .ops = &g_tty_ops,
+ .priv = &g_tty0_priv,
+ .xmit =
+ {
+ .size = BUFSIZE,
+ .buffer = g_tty0_txbuf,
+ },
+ .recv =
+ {
+ .size = BUFSIZE,
+ .buffer = g_tty0_rxbuf,
+ },
+};
+#endif
+
+#ifdef CONFIG_SIM_UART1_NAME
+static struct tty_priv_s g_tty1_priv =
+{
+ .path = CONFIG_SIM_UART1_NAME,
+ .fd = -1,
+};
+
+static struct uart_dev_s g_tty1_dev =
+{
+ .ops = &g_tty_ops,
+ .priv = &g_tty1_priv,
+ .xmit =
+ {
+ .size = BUFSIZE,
+ .buffer = g_tty1_txbuf,
+ },
+ .recv =
+ {
+ .size = BUFSIZE,
+ .buffer = g_tty1_rxbuf,
+ },
+};
+#endif
+
+#ifdef CONFIG_SIM_UART2_NAME
+static struct tty_priv_s g_tty2_priv =
+{
+ .path = CONFIG_SIM_UART2_NAME,
+ .fd = -1,
+};
+
+static struct uart_dev_s g_tty2_dev =
+{
+ .ops = &g_tty_ops,
+ .priv = &g_tty2_priv,
+ .xmit =
+ {
+ .size = BUFSIZE,
+ .buffer = g_tty2_txbuf,
+ },
+ .recv =
+ {
+ .size = BUFSIZE,
+ .buffer = g_tty2_rxbuf,
+ },
+};
+#endif
+
+#ifdef CONFIG_SIM_UART3_NAME
+static struct tty_priv_s g_tty3_priv =
+{
+ .path = CONFIG_SIM_UART3_NAME,
+ .fd = -1,
+};
+
+static struct uart_dev_s g_tty3_dev =
+{
+ .ops = &g_tty_ops,
+ .priv = &g_tty3_priv,
+ .xmit =
+ {
+ .size = BUFSIZE,
+ .buffer = g_tty3_txbuf,
+ },
+ .recv =
+ {
+ .size = BUFSIZE,
+ .buffer = g_tty3_rxbuf,
+ },
+};
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+#if defined(USE_DEVCONSOLE) || CONFIG_SIM_UART_NUMBER > 0
+/****************************************************************************
+ * Name: tty_setup
+ *
+ * Description:
+ * Configure the UART baud, bits, parity, fifos, etc. This
+ * method is called the first time that the serial port is
+ * opened.
+ *
+ ****************************************************************************/
+
+static int tty_setup(FAR struct uart_dev_s *dev)
+{
+ FAR struct tty_priv_s *priv = dev->priv;
+
+ if (!dev->isconsole && priv->fd < 0)
+ {
+ priv->fd = simuart_open(priv->path);
+ if (priv->fd < 0)
+ {
+ return priv->fd;
+ }
+ }
+
+ return OK;
+}
+
+/****************************************************************************
+ * Name: tty_shutdown
+ *
+ * Description:
+ * Disable the UART. This method is called when the serial
+ * port is closed
+ *
+ ****************************************************************************/
+
+static void tty_shutdown(struct uart_dev_s *dev)
+{
+ FAR struct tty_priv_s *priv = dev->priv;
+
+ if (!dev->isconsole && priv->fd >= 0)
+ {
+ /* close file Description and reset fd */
+
+ simuart_close(priv->fd);
+ priv->fd = -1;
+ }
+}
+
+/****************************************************************************
+ * Name: tty_attach
+ *
+ * Description:
+ * Configure the UART to operation in interrupt driven mode. This method
+ * is called when the serial port is opened. Normally, this is just after
+ * the setup() method is called, however, the serial console may operate in
+ * a non-interrupt driven mode during the boot phase.
+ *
+ * RX and TX interrupts are not enabled when by the attach method (unless
+ * the hardware supports multiple levels of interrupt enabling). The RX
+ * and TX interrupts are not enabled until the txint() and rxint() methods
+ * are called.
+ *
+ ****************************************************************************/
+
+static int tty_attach(struct uart_dev_s *dev)
+{
+ return OK;
+}
+
+/****************************************************************************
+ * Name: tty_detach
+ *
+ * Description:
+ * Detach UART interrupts. This method is called when the serial port is
+ * closed normally just before the shutdown method is called. The
+ * exception is the serial console which is never shutdown.
+ *
+ ****************************************************************************/
+
+static void tty_detach(FAR struct uart_dev_s *dev)
+{
+}
+
+/****************************************************************************
+ * Name: tty_ioctl
+ *
+ * Description:
+ * All ioctl calls will be routed through this method
+ *
+ ****************************************************************************/
+
+static int tty_ioctl(struct file *filep, int cmd, unsigned long arg)
+{
+#ifdef CONFIG_SERIAL_TERMIOS
+ FAR struct inode *inode = filep->f_inode;
+ FAR struct uart_dev_s *dev = inode->i_private;
+ FAR struct tty_priv_s *priv = dev->priv;
+ FAR struct termios *termiosp = (FAR struct termios *)(uintptr_t)arg;
+
+ if (!termiosp)
+ {
+ return -EINVAL;
+ }
+
+ switch (cmd)
+ {
+ case TCGETS:
+ return simuart_getcflag(priv->fd, &termiosp->c_cflag);
Review comment:
Yes, I have finished the modification. Thanks!
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