From f6ba15a8667200894ddb28207bcd776cbb19df7e Mon Sep 17 00:00:00 2001 From: patacongo Date: Fri, 4 May 2007 01:30:48 +0000 Subject: [PATCH] Added serial driver git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@201 42af7a65-404d-4744-a932-0658087f49c3 --- arch/arm/include/lpc214x/irq.h | 28 +- arch/arm/src/lpc214x/Make.defs | 4 +- arch/arm/src/lpc214x/lpc214x_lowputc.S | 2 +- arch/arm/src/lpc214x/lpc214x_serial.c | 712 +++++++++++++++++++++++++ arch/arm/src/lpc214x/lpc214x_uart.h | 3 +- 5 files changed, 732 insertions(+), 17 deletions(-) create mode 100644 arch/arm/src/lpc214x/lpc214x_serial.c diff --git a/arch/arm/include/lpc214x/irq.h b/arch/arm/include/lpc214x/irq.h index 1542ee290b..8b836c8928 100644 --- a/arch/arm/include/lpc214x/irq.h +++ b/arch/arm/include/lpc214x/irq.h @@ -1,4 +1,4 @@ -/************************************************************ +/**************************************************************************** * arch/lpc214x/irq.h * * Copyright (C) 2007 Gregory Nutt. All rights reserved. @@ -31,7 +31,7 @@ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * - ************************************************************/ + ****************************************************************************/ /* This file should never be included directed but, rather, * only indirectly through nuttx/irq.h @@ -40,13 +40,13 @@ #ifndef __ARCH_LPC214X_IRQ_H #define __ARCH_LPC214X_IRQ_H -/************************************************************ +/**************************************************************************** * Included Files - ************************************************************/ + ****************************************************************************/ -/************************************************************ +/**************************************************************************** * Definitions - ************************************************************/ + ****************************************************************************/ /* LPC214X Interrupts */ @@ -76,25 +76,25 @@ #define NR_IRQS 23 -/************************************************************ +/**************************************************************************** * Public Types - ************************************************************/ + ****************************************************************************/ #ifndef __ASSEMBLY__ typedef void (*vic_vector_t)(uint32 *regs); #endif -/************************************************************ +/**************************************************************************** * Inline functions - ************************************************************/ + ****************************************************************************/ -/************************************************************ +/**************************************************************************** * Public Variables - ************************************************************/ + ****************************************************************************/ -/************************************************************ +/**************************************************************************** * Public Function Prototypes - ************************************************************/ + ****************************************************************************/ #ifndef __ASSEMBLY__ #ifdef __cplusplus diff --git a/arch/arm/src/lpc214x/Make.defs b/arch/arm/src/lpc214x/Make.defs index 30843b6ba3..1ff1ccd8d5 100644 --- a/arch/arm/src/lpc214x/Make.defs +++ b/arch/arm/src/lpc214x/Make.defs @@ -45,4 +45,6 @@ CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_copystate.c \ up_undefinedinsn.c up_usestack.c CHIP_ASRCS = lpc214x_lowputc.S -CHIP_CSRCS = lpc214x_decodeirq.c lpc214x_irq.c lpc214x_timerisr.c +CHIP_CSRCS = lpc214x_decodeirq.c lpc214x_irq.c lpc214x_timerisr.c \ + lpc214x_serial.c + diff --git a/arch/arm/src/lpc214x/lpc214x_lowputc.S b/arch/arm/src/lpc214x/lpc214x_lowputc.S index 9ad6a47db1..c092b1dd18 100644 --- a/arch/arm/src/lpc214x/lpc214x_lowputc.S +++ b/arch/arm/src/lpc214x/lpc214x_lowputc.S @@ -166,7 +166,7 @@ up_lowsetup: ldr r0, =LPC214X_PINSEL0 ldr r1, [r0] - ldr r2, =LPC214X_UART_PINMASK + ldr r2, =~LPC214X_UART_PINMASK and r1, r2 ldr r2, =LPC214X_UART_PINSEL orr r1, r2 diff --git a/arch/arm/src/lpc214x/lpc214x_serial.c b/arch/arm/src/lpc214x/lpc214x_serial.c new file mode 100644 index 0000000000..cc4afd0e2e --- /dev/null +++ b/arch/arm/src/lpc214x/lpc214x_serial.c @@ -0,0 +1,712 @@ +/**************************************************************************** + * lpc214x/lpc214x_serial.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "up_arch.h" +#include "os_internal.h" +#include "up_internal.h" + +#include "lpc214x_uart.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#define BASE_BAUD 115200 + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct up_dev_s +{ + uint32 uartbase; /* Base address of UART registers */ + uint32 baud; /* Configured baud */ + ubyte ier; /* Saved IER 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 LPC214X uart0 port. */ + +static struct up_dev_s g_uart0priv = +{ + .uartbase = LPC214X_UART0_BASE, + .baud = CONFIG_UART0_BAUD, + .parity = CONFIG_UART0_PARITY, + .bits = CONFIG_UART0_BITS, + .stopbits2 = CONFIG_UART0_2STOP, +}; + +static uart_dev_t g_uart0port = +{ + .irq = LPC214X_UART0_IRQ, + .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 LPC214X uart1 port. */ + +static struct up_dev_s g_uart1priv = +{ + .uartbase = LPC214X_UART1_BASE, + .baud = CONFIG_UART1_BAUD, + .parity = CONFIG_UART1_PARITY, + .bits = CONFIG_UART1_BITS, + .stopbits2 = CONFIG_UART1_2STOP, +}; + +static uart_dev_t g_uart1port = +{ + .irq = LPC214X_UART1_IRQ, + .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 ubyte up_serialin(struct up_dev_s *priv, int offset) +{ + return getreg16(priv->uartbase + offset); +} + +/**************************************************************************** + * Name: up_serialout + ****************************************************************************/ + +static inline void up_serialout(struct up_dev_s *priv, int offset, ubyte value) +{ + putreg16(value, priv->uartbase + offset); +} + +/**************************************************************************** + * Name: up_disableuartint + ****************************************************************************/ + +static inline void up_disableuartint(struct up_dev_s *priv, ubyte *ier) +{ + if (ier) + { + *ier = priv->ier & LPC214X_IER_ALLIE; + } + + priv->ier &= ~LPC214X_IER_ALLIE; + up_serialout(priv, LPC214X_IER_OFFSET, priv->ier); +} + +/**************************************************************************** + * Name: up_restoreuartint + ****************************************************************************/ + +static inline void up_restoreuartint(struct up_dev_s *priv, ubyte ier) +{ + priv->ier |= ier & LPC214X_IER_ALLIE; + up_serialout(priv, LPC214X_IER_OFFSET, priv->ier); +} + +/**************************************************************************** + * Name: up_waittxfifonotfull + ****************************************************************************/ + +static inline void up_waittxfifonotfull(struct up_dev_s *priv) +{ + int tmp; + + /* Limit how long we will wait for the TX available condition */ + for (tmp = 1000 ; tmp > 0 ; tmp--) + { + /* Check if the tranmitter holding register (THR) is empty */ + if ((up_serialin(priv, LPC214X_LSR_OFFSET) & LPC214X_LSR_THRE) != 0) + { + /* The THR is empty, return */ + break; + } + } +} + +/**************************************************************************** + * Name: up_enablebreaks + ****************************************************************************/ + +static inline void up_enablebreaks(struct up_dev_s *priv, boolean enable) +{ + ubyte lcr = up_serialin(priv, LPC214X_LCR_OFFSET); + if (enable) + { + lcr |= LPC214X_LCR_BREAK_ENABLE; + } + else + { + lcr &= ~LPC214X_LCR_BREAK_ENABLE; + } + up_serialout(priv, LPC214X_LCR_OFFSET, 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_LPC214X_UART_CONFIG + struct up_dev_s *priv = (struct up_dev_s*)dev->priv; + uint16 baud; + ubyte lcr; + + /* Clear fifos */ + + up_serialout(priv, LPC214X_FCR_OFFSET, (LPC214X_FCR_RX_FIFO_RESET|LPC214X_FCR_TX_FIFO_RESET)); + + /* Set trigger */ + + up_serialout(priv, LPC214X_FCR_OFFSET, (LPC214X_FCR_FIFO_ENABLE|LPC214X_FCR_FIFO_TRIG14)); + + /* Set up the IER */ + + priv->ier = up_serialin(priv, LPC214X_IER_OFFSET); + + /* Set up the LCR */ + + lcr = 0; + + if (priv->bits == 7) + { + lcr |= LPC214X_LCR_CHAR_7; + } + else + { + lcr |= LPC214X_LCR_CHAR_8; + } + + if (priv->stopbits2) + { + lcr |= LPC214X_LCR_STOP_2; + } + + if (priv->parity == 1) + { + lcr |= LPC214X_LCR_PAR_ODD; + } + else if (priv->parity == 2) + { + lcr |= LPC214X_LCR_PAR_EVEN; + } + + /* Enter DLAB=1 */ + + up_serialout(priv, LPC214X_LCR_OFFSET, (lcr | LPC214X_LCR_DLAB_ENABLE)); + + /* Set the BAUD divisor */ + + baud = UART_BAUD(priv->baud); + up_serialout(priv, LPC214X_DLM_OFFSET, baud >> 8); + up_serialout(priv, LPC214X_DLL_OFFSET, baud & 0xff); + + /* Clear DLAB */ + + up_serialout(priv, LPC214X_LCR_OFFSET, lcr); +#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*)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; + ubyte 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( passes = 0; passes < 256; passes++) + { + /* Get the current UART status and check for loop + * termination conditions + */ + + status = up_serialin(priv, LPC214X_IIR_OFFSET); + + /* The NO INTERRUPT should be zero */ + + if (status != LPC214X_IIR_NO_INT) + { + /* Handline incoming, receive bytes (with or without timeout) */ + + if (status == LPC214X_IIR_RDA_INT || status == LPC214X_IIR_CTI_INT) + { + uart_recvchars(dev); + } + + /* Handle outgoing, transmit bytes */ + + else if (status == LPC214X_IIR_THRE_INT) + { + uart_xmitchars(dev); + } + + /* Just clear modem status interrupts */ + + else if (status == LPC214X_IIR_MS_INT) + { + /* Read the modem status regisgter (MSR) to clear */ + + (void)up_serialin(priv, LPC214X_MSR_OFFSET); + } + + /* Just clear any line status interrupts */ + + else if (status == LPC214X_IIR_RLS_INT) + { + /* Read the line status register (LSR) to clear */ + + (void)up_serialin(priv, LPC214X_LSR_OFFSET); + } + } + } + return OK; +} + +/**************************************************************************** + * 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; + ubyte rbr; + + rbr = up_serialin(priv, LPC214X_RBR_OFFSET); + *status = up_serialin(priv, LPC214X_RBR_OFFSET); + return rbr; +} + +/**************************************************************************** + * 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->ier |= LPC214X_IER_ERBFI; +#endif + } + else + { + priv->ier &= ~LPC214X_IER_ERBFI; + } + up_serialout(priv, LPC214X_IER_OFFSET, priv->ier); +} + +/**************************************************************************** + * 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, LPC214X_LSR_OFFSET) & LPC214X_LSR_RDR) != 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, LPC214X_THR_OFFSET, (ubyte)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->ier |= LPC214X_IER_ETBEI; +#endif + } + else + { + priv->ier &= ~LPC214X_IER_ETBEI; + } + up_serialout(priv, LPC214X_IER_OFFSET, priv->ier); +} + +/**************************************************************************** + * 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, LPC214X_LSR_OFFSET) & LPC214X_LSR_THRE) != 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, LPC214X_LSR_OFFSET) & LPC214X_LSR_THRE) != 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) +{ + /* Enable UART0 and 1 */ + + uint32 pinsel = getreg32(LPC214X_PINSEL0); + pinsel &= ~(LPC214X_UART0_PINMASK|LPC214X_UART1_PINMASK); + pinsel |= (LPC214X_UART0_PINSEL|LPC214X_UART1_PINSEL); + putreg32(pinsel, LPC214X_PINSEL0); + + /* Disable both UARTS */ + + up_disableuartint(TTYS0_DEV.priv, NULL); + up_disableuartint(TTYS1_DEV.priv, NULL); + + /* Configuration whichever on is the console */ + + 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; + ubyte ier; + + up_disableuartint(priv, &ier); + up_waittxfifonotfull(priv); + up_serialout(priv, LPC214X_THR_OFFSET, (ubyte)ch); + + /* Check for LF */ + + if (ch == '\n') + { + /* Add CR */ + + up_waittxfifonotfull(priv); + up_serialout(priv, LPC214X_THR_OFFSET, '\r'); + } + + up_waittxfifonotfull(priv); + up_restoreuartint(priv, ier); + return ch; +} + diff --git a/arch/arm/src/lpc214x/lpc214x_uart.h b/arch/arm/src/lpc214x/lpc214x_uart.h index 6369825899..7e1533abe6 100755 --- a/arch/arm/src/lpc214x/lpc214x_uart.h +++ b/arch/arm/src/lpc214x/lpc214x_uart.h @@ -63,7 +63,8 @@ #define LPC214X_IER_ERBFI (1 << 0) /* Enable receive data available int */ #define LPC214X_IER_ETBEI (1 << 1) /* Enable THR empty Interrupt */ #define LPC214X_IER_ELSI (1 << 2) /* Enable receive line status int */ -#define LPC214X_IER_EDSSI (1 << 3) /* Enable MODEM atatus interrupt */ +#define LPC214X_IER_EDSSI (1 << 3) /* Enable MODEM atatus interrupt (2146/6/8 UART1 Only) */ +#define LPC214X_IER_ALLIE 0x0f /* All interrupts */ /* Interrupt ID Register(IIR) bit definitions */