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Added serial console driver for dm320

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@79 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2007-03-17 14:52:46 +00:00
parent 223a7dcd51
commit bf8f372a39
7 changed files with 804 additions and 13 deletions
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2
arch/c5471/src/up_serial.c
View File

@ -136,7 +136,7 @@ struct uart_ops_s g_uart_ops =
static char g_irdarxbuffer[CONFIG_UART_IRDA_RXBUFSIZE];
static char g_irdatxbuffer[CONFIG_UART_IRDA_TXBUFSIZE];
static char g_modemrxbuffer[CONFIG_UART_IRDA_RXBUFSIZE];
static char g_modemrxbuffer[CONFIG_UART_MODEM_RXBUFSIZE];
static char g_modemtxbuffer[CONFIG_UART_MODEM_TXBUFSIZE];
/* This describes the state of the C5471 serial IRDA port. */

3
arch/dm320/defconfig
View File

@ -54,7 +54,6 @@ CONFIG_ARCH_STACKDUMP=y
#
# CONFIG_UARTn_SERIAL_CONSOLE - selects the UARTn for the
# console and ttys0 (default is the UART0).
# CONFIG_UARTn_HWFLOWCONTROL - enables hardware flow control
# CONFIG_UARTn_RXBUFSIZE - Characters are buffered as received.
# This specific the size of the receive buffer
# CONFIG_UARTn_TXBUFSIZE - Characters are buffered before
@ -66,8 +65,6 @@ CONFIG_ARCH_STACKDUMP=y
#
CONFIG_UART0_SERIAL_CONSOLE=y
CONFIG_UART1_SERIAL_CONSOLE=n
CONFIG_UART0_HWFLOWCONTROL=n
CONFIG_UART1_HWFLOWCONTROL=n
CONFIG_UART0_TXBUFSIZE=256
CONFIG_UART1_TXBUFSIZE=256
CONFIG_UART0_RXBUFSIZE=256

61
arch/dm320/include/serial.h Normal file
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@ -0,0 +1,61 @@
/************************************************************
* serial.h
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 Gregory Nutt 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.
*
************************************************************/
#ifndef __ARCH_SERIAL_H
#define __ARCH_SERIAL_H
/************************************************************
* Included Files
************************************************************/
/************************************************************
* Definitions
************************************************************/
/* IOCTL commands supported by the DM320 serial driver */
#define TIOCSBRK 0x5401 /* BSD compatibility */
#define TIOCCBRK 0x5402 /* " " " " */
#define TIOCSERGSTRUCT 0x5403 /* Get up_dev_t for port */
/************************************************************
* Public Data
************************************************************/
/************************************************************
* Public Functions
************************************************************/
#endif /* __ARCH_SERIAL_H */

16
arch/dm320/src/Makefile
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@ -45,14 +45,14 @@ ASRCS += up_lowputc.S
endif
AOBJS = $(ASRCS:.S=.o)
CSRCS = up_boot.c up_initialize.c up_initialstate.c up_idle.c up_doirq.c \
up_irq.c up_syscall.c up_dataabort.c up_prefetchabort.c \
up_undefinedinsn.c up_interruptcontext.c up_timerisr.c \
up_createstack.c up_usestack.c up_releasestack.c \
up_exit.c up_assert.c up_blocktask.c up_unblocktask.c \
up_releasepending.c up_reprioritizertr.c up_copystate.c \
up_schedulesigaction.c up_sigdeliver.c \
up_delay.c up_allocateheap.c
CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_boot.c \
up_copystate.c up_createstack.c up_dataabort.c up_delay.c \
up_doirq.c up_exit.c up_idle.c up_initialize.c \
up_initialstate.c up_interruptcontext.c up_irq.c \
up_prefetchabort.c up_releasepending.c up_releasestack.c \
up_reprioritizertr.c up_schedulesigaction.c up_serial.c \
up_sigdeliver.c up_syscall.c up_timerisr.c up_unblocktask.c \
up_undefinedinsn.c up_usestack.c
COBJS = $(CSRCS:.c=.o)
SRCS = $(ASRCS) $(CSRCS)

2
arch/dm320/src/dm320-uart.h
View File

@ -67,7 +67,7 @@
#define UART_DTRR_FE 0x0400 /* Framing error */
#define UART_DTRR_ORF 0x0200 /* Overrun flag */
#define UART_DTRR_PEF 0x0100 /* Parity error */
#define UART_DTRR_DTR_MAS K 0x00ff /* Data transmit/receive */
#define UART_DTRR_DTR_MASK 0x00ff /* Data transmit/receive */
/* UART BRSR register bit definitions */
/* The UART clock is half of the ARM clock */

7
arch/dm320/src/up_head.S
View File

@ -277,6 +277,13 @@ __start:
bl up_boot
/* Perform early serial initialization */
#ifdef CONFIG_DEV_CONSOLE
mov fp, #0
bl up_earlyserialinit
#endif
/* Finally branch to the OS entry point */
mov lr, #0

726
arch/dm320/src/up_serial.c Normal file
View File

@ -0,0 +1,726 @@
/************************************************************
* up_serial.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 Gregory Nutt 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 <unistd.h>
#include <semaphore.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include <nuttx/serial.h>
#include <arch/serial.h>
#include "dm320.h"
#include "os_internal.h"
#include "up_internal.h"
/************************************************************
* Definitions
************************************************************/
#define BASE_BAUD 115200
/************************************************************
* Private Types
************************************************************/
struct up_dev_s
{
uint32 uartbase; /* Base address of UART
* registers */
uint32 baud; /* Configured baud */
uint16 msr; /* Saved MSR value */
ubyte irq; /* IRQ associated with
* this UART */
ubyte parity; /* 0=none, 1=odd, 2=even */
ubyte bits; /* Number of bits (7 or 8) */
boolean stopbits2; /* TRUE: Configure with 2
* stop bits instead of 1 */
};
/************************************************************
* Private Function Prototypes
************************************************************/
static int up_setup(struct uart_dev_s *dev);
static void up_shutdown(struct uart_dev_s *dev);
static int up_interrupt(int irq, void *context);
static int up_ioctl(struct file *filep, int cmd, unsigned long arg);
static int up_receive(struct uart_dev_s *dev, uint32 *status);
static void up_rxint(struct uart_dev_s *dev, boolean enable);
static boolean up_rxfifonotempty(struct uart_dev_s *dev);
static void up_send(struct uart_dev_s *dev, int ch);
static void up_txint(struct uart_dev_s *dev, boolean enable);
static boolean up_txfifonotfull(struct uart_dev_s *dev);
static boolean up_txfifoempty(struct uart_dev_s *dev);
/************************************************************
* Private Variables
************************************************************/
struct uart_ops_s g_uart_ops =
{
.setup = up_setup,
.shutdown = up_shutdown,
.handler = up_interrupt,
.ioctl = up_ioctl,
.receive = up_receive,
.rxint = up_rxint,
.rxfifonotempty = up_rxfifonotempty,
.send = up_send,
.txint = up_txint,
.txfifonotfull = up_txfifonotfull,
.txfifoempty = up_txfifoempty,
};
/* I/O buffers */
static char g_uart0rxbuffer[CONFIG_UART0_RXBUFSIZE];
static char g_uart0txbuffer[CONFIG_UART0_TXBUFSIZE];
static char g_uart1rxbuffer[CONFIG_UART1_RXBUFSIZE];
static char g_uart1txbuffer[CONFIG_UART1_TXBUFSIZE];
/* This describes the state of the DM320 uart0 port. */
static struct up_dev_s g_uart0priv =
{
.uartbase = DM320_UART0_REGISTER_BASE,
.baud = CONFIG_UART0_BAUD,
.parity = CONFIG_UART0_PARITY,
.bits = CONFIG_UART0_BITS,
.stopbits2 = CONFIG_UART0_2STOP,
};
static uart_dev_t g_uart0port =
{
.irq = DM320_IRQ_UART0,
.recv =
{
.size = CONFIG_UART0_RXBUFSIZE,
.buffer = g_uart0rxbuffer,
},
.xmit =
{
.size = CONFIG_UART0_TXBUFSIZE,
.buffer = g_uart0txbuffer,
},
.ops = &g_uart_ops,
.priv = &g_uart0priv,
};
/* This describes the state of the DM320 uart1 port. */
static struct up_dev_s g_uart1priv =
{
.uartbase = DM320_UART1_REGISTER_BASE,
.baud = CONFIG_UART1_BAUD,
.parity = CONFIG_UART1_PARITY,
.bits = CONFIG_UART1_BITS,
.stopbits2 = CONFIG_UART1_2STOP,
};
static uart_dev_t g_uart1port =
{
.irq = DM320_IRQ_UART1,
.recv =
{
.size = CONFIG_UART1_RXBUFSIZE,
.buffer = g_uart1rxbuffer,
},
.xmit =
{
.size = CONFIG_UART1_TXBUFSIZE,
.buffer = g_uart1txbuffer,
},
.ops = &g_uart_ops,
.priv = &g_uart1priv,
};
/* Now, which one with be tty0/console and which tty1? */
#ifdef CONFIG_SERIAL_IRDA_CONSOLE
# define CONSOLE_DEV g_uart1port
# define TTYS0_DEV g_uart1port
# define TTYS1_DEV g_uart0port
#else
# define CONSOLE_DEV g_uart0port
# define TTYS0_DEV g_uart0port
# define TTYS1_DEV g_uart1port
#endif
/************************************************************
* Private Functions
************************************************************/
/************************************************************
* Name: up_serialin
************************************************************/
static inline uint16 up_serialin(struct up_dev_s *priv, uint32 offset)
{
return getreg16(priv->uartbase + offset);
}
/************************************************************
* Name: up_serialout
************************************************************/
static inline void up_serialout(struct up_dev_s *priv, uint32 offset, uint16 value)
{
putreg16(value, priv->uartbase + offset);
}
/************************************************************
* Name: up_disableuartint
************************************************************/
static inline void up_disableuartint(struct up_dev_s *priv, uint16 *msr)
{
if (msr)
{
*msr = priv->msr & UART_MSR_ALLIE;
}
priv->msr &= ~UART_MSR_ALLIE;
up_serialout(priv, UART_MSR, priv->msr);
}
/************************************************************
* Name: up_restoreuartint
************************************************************/
static inline void up_restoreuartint(struct up_dev_s *priv, uint16 msr)
{
priv->msr |= msr & UART_MSR_ALLIE;
up_serialout(priv, UART_MSR, priv->msr);
}
/************************************************************
* Name: up_waittxfifonotfull
************************************************************/
static inline void up_waittxfifonotfull(struct up_dev_s *priv)
{
int tmp;
for (tmp = 1000 ; tmp > 0 ; tmp--)
{
if ((up_serialin(priv, UART_SR) & UART_SR_TFTI) != 0)
{
break;
}
}
}
/************************************************************
* Name: up_enablebreaks
************************************************************/
static inline void up_enablebreaks(struct up_dev_s *priv, boolean enable)
{
uint16 lcr = up_serialin(priv, UART_LCR);
if (enable)
{
lcr |= UART_LCR_BOC;
}
else
{
lcr &= ~UART_LCR_BOC;
}
up_serialout(priv, UART_LCR, lcr);
}
/************************************************************
* Name: up_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 up_setup(struct uart_dev_s *dev)
{
#ifdef CONFIG_SUPPRESS_UART_CONFIG
struct up_dev_s *priv = (struct up_dev_s*)CONSOLE_DEV.priv;
uint16 brsr;
/* Clear fifos */
up_serialout(priv, UART_DM320_RFCR, 0x8000);
up_serialout(priv, UART_DM320_TFCR, 0x8000);
/* Set rx and tx triggers */
up_serialout(priv, UART_DM320_RFCR, UART_RFCR_RTL_1);
up_serialout(priv, UART_DM320_TFCR, UART_TFCR_TTL_1);
/* Set up the MSR */
priv->msr = up_serialin(priv, UART_MSR);
if (priv->bits == 7)
{
priv->msr |= UART_DATABIT_7;
}
else
{
priv->msr &= ~UART_MSR_CLS;
}
if (priv->stopbits2)
{
priv->msr |= UART_STOPBIT_2;
}
else
{
priv->msr &= ~UART_MSR_SBLS;
}
if (priv->parity == 1)
{
priv->msr |= UART_ODDPARITY;
}
else if (priv->parity == 2)
{
priv->msr |= UART_EVENPARITY;
}
else
{
priv->msr &= ~(UART_MSR_PSB|UART_MSR_PEB);
}
/* Set up the BRSR */
switch (dev->baud)
{
case 2400:
brsr = UART_BAUD_2400;
break;
case 4800:
brsr = UART_BAUD_4800;
break;
default:
case 9600:
brsr = UART_BAUD_9600;
break;
case 14400:
brsr = UART_BAUD_14400;
break;
case 19200:
brsr = UART_BAUD_19200;
break;
case 28800:
brsr = UART_BAUD_28800;
break;
case 3840:
brsr = UART_BAUD_38400;
break;
case 57600:
brsr = UART_BAUD_57600;
break;
case 115200:
brsr = UART_BAUD_115200;
break;
case 230400:
brsr = UART_BAUD_230400;
break;
case 460800:
brsr = UART_BAUD_460800;
break;
case 921600:
brsr = UART_BAUD_921600;
break;
}
/* Setup the new UART configuration */
up_serialout(priv,UART_MSR, priv->msr);
up_serialout(priv, UART_DM320_BRSR, brsr);
up_enablebreaks(priv, FALSE);
#endif
return OK;
}
/************************************************************
* Name: up_shutdown
*
* Description:
* Disable the UART. This method is called when the serial
* port is closed
*
************************************************************/
static void up_shutdown(struct uart_dev_s *dev)
{
struct up_dev_s *priv = (struct up_dev_s*)CONSOLE_DEV.priv;
up_disableuartint(priv, NULL);
}
/************************************************************
* Name: up_interrupt
*
* Description:
* This is the UART interrupt handler. It will be invoked
* when an interrupt received on the 'irq' It should call
* uart_transmitchars or uart_receivechar to perform the
* appropriate data transfers. The interrupt handling logic\
* must be able to map the 'irq' number into the approprite
* uart_dev_s structure in order to call these functions.
*
************************************************************/
static int up_interrupt(int irq, void *context)
{
struct uart_dev_s *dev = NULL;
struct up_dev_s *priv;
uint16 status;
int passes;
if (g_uart1port.irq == irq)
{
dev = &g_uart1port;
}
else if (g_uart0port.irq == irq)
{
dev = &g_uart0port;
}
else
{
PANIC(OSERR_INTERNAL);
}
priv = (struct up_dev_s*)dev->priv;
/* Loop until there are no characters to be transferred or,
* until we have been looping for a long time.
*/
for(;;)
{
/* Get the current UART status and check for loop
* termination conditions
*/
status = up_serialin(priv, UART_SR);
status &= (UART_SR_RFTI | UART_SR_TFTI);
if (status == 0 || passes > 256)
{
return OK;
}
/* Handline incoming, receive bytes */
if (status & UART_SR_RFTI)
{
uart_recvchars(dev);
}
/* Handle outgoing, transmit bytes */
if (status & UART_SR_TFTI)
{
uart_xmitchars(dev);
}
/* Keep track of how many times we do this in case there
* is some hardware failure condition.
*/
passes++;
}
}
/************************************************************
* Name: up_ioctl
*
* Description:
* All ioctl calls will be routed through this method
*
************************************************************/
static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
{
struct inode *inode = filep->f_inode;
struct uart_dev_s *dev = inode->i_private;
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
int ret = OK;
switch (cmd)
{
case TIOCSERGSTRUCT:
{
struct up_dev_s *user = (struct up_dev_s*)arg;
if (!user)
{
*get_errno_ptr() = EINVAL;
ret = ERROR;
}
else
{
memcpy(user, dev, sizeof(struct up_dev_s));
}
}
break;
case TIOCSBRK: /* BSD compatibility: Turn break on, unconditionally */
{
irqstate_t flags = irqsave();
up_enablebreaks(priv, TRUE);
irqrestore(flags);
}
break;
case TIOCCBRK: /* BSD compatibility: Turn break off, unconditionally */
{
irqstate_t flags;
flags = irqsave();
up_enablebreaks(priv, FALSE);
irqrestore(flags);
}
break;
default:
*get_errno_ptr() = ENOTTY;
ret = ERROR;
break;
}
return ret;
}
/************************************************************
* Name: up_receive
*
* Description:
* Called (usually) from the interrupt level to receive one
* character from the UART. Error bits associated with the
* receipt are provided in the the return 'status'.
*
************************************************************/
static int up_receive(struct uart_dev_s *dev, uint32 *status)
{
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
uint16 dtrr;
dtrr = up_serialin(priv, UART_DTRR);
*status = dtrr;
return dtrr & UART_DTRR_DTR_MASK;
}
/************************************************************
* Name: up_rxint
*
* Description:
* Call to enable or disable RX interrupts
*
************************************************************/
static void up_rxint(struct uart_dev_s *dev, boolean enable)
{
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
if (enable)
{
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
priv->msr |= UART_MSR_RFTIE;
#endif
}
else
{
priv->msr &= ~UART_MSR_RFTIE;
}
up_serialout(priv, UART_MSR, priv->msr);
}
/************************************************************
* Name: up_rxfifonotempty
*
* Description:
* Return TRUE if the receive fifo is not empty
*
************************************************************/
static boolean up_rxfifonotempty(struct uart_dev_s *dev)
{
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
return ((up_serialin(priv, UART_SR) & UART_SR_RFNEF) != 0);
}
/************************************************************
* Name: up_send
*
* Description:
* This method will send one byte on the UART
*
************************************************************/
static void up_send(struct uart_dev_s *dev, int ch)
{
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
up_serialout(priv, UART_DTRR, (uint16)ch);
}
/************************************************************
* Name: up_txint
*
* Description:
* Call to enable or disable TX interrupts
*
************************************************************/
static void up_txint(struct uart_dev_s *dev, boolean enable)
{
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
if (enable)
{
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
priv->msr |= UART_MSR_TFTIE;
#endif
}
else
{
priv->msr &= ~UART_MSR_TFTIE;
}
up_serialout(priv, UART_MSR, priv->msr);
}
/************************************************************
* Name: up_txfifonotfull
*
* Description:
* Return TRUE if the tranmsit fifo is not full
*
************************************************************/
static boolean up_txfifonotfull(struct uart_dev_s *dev)
{
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
return ((up_serialin(priv, UART_SR) & UART_SR_TFTI) != 0);
}
/************************************************************
* Name: up_txfifoempty
*
* Description:
* Return TRUE if the transmit fifo is empty
*
************************************************************/
static boolean up_txfifoempty(struct uart_dev_s *dev)
{
struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
return ((up_serialin(priv, UART_SR) & UART_SR_TREF) == 0);
}
/************************************************************
* Public Funtions
************************************************************/
/************************************************************
* Name: up_serialinit
*
* Description:
* Performs the low level UART initialization early in
* debug so that the serial console will be available
* during bootup. This must be called before up_serialinit.
*
************************************************************/
void up_earlyserialinit(void)
{
up_disableuartint(TTYS0_DEV.priv, NULL);
up_disableuartint(TTYS1_DEV.priv, NULL);
CONSOLE_DEV.isconsole = TRUE;
up_setup(&CONSOLE_DEV);
}
/************************************************************
* Name: up_serialinit
*
* Description:
* Register serial console and serial ports. This assumes
* that up_earlyserialinit was called previously.
*
************************************************************/
void up_serialinit(void)
{
(void)uart_register("/dev/console", &CONSOLE_DEV);
(void)uart_register("/dev/ttyS0", &TTYS0_DEV);
(void)uart_register("/dev/ttyS1", &TTYS1_DEV);
}
/************************************************************
* Name: up_putc
*
* Description:
* Provide priority, low-level access to support OS debug
* writes
*
************************************************************/
int up_putc(int ch)
{
struct up_dev_s *priv = (struct up_dev_s*)CONSOLE_DEV.priv;
uint16 ier;
up_disableuartint(priv, &ier);
up_waittxfifonotfull(priv);
up_serialout(priv, UART_DTRR, (uint16)ch);
/* Check for LF */
if (ch == '\n')
{
/* Add CR */
up_waittxfifonotfull(priv);
up_serialout(priv, UART_DTRR, '\r');
}
up_waittxfifonotfull(priv);
up_restoreuartint(priv, ier);
return ch;
}