From 28d607865c3224b7398f9715039bb8d31537ee1c Mon Sep 17 00:00:00 2001 From: patacongo Date: Tue, 1 May 2007 00:28:53 +0000 Subject: Low level UART support git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@196 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/arch/arm/src/lpc214x/lpc214x_uart.h | 141 ++++++++++++++++++++++++++++++ 1 file changed, 141 insertions(+) create mode 100755 nuttx/arch/arm/src/lpc214x/lpc214x_uart.h (limited to 'nuttx/arch/arm/src/lpc214x/lpc214x_uart.h') diff --git a/nuttx/arch/arm/src/lpc214x/lpc214x_uart.h b/nuttx/arch/arm/src/lpc214x/lpc214x_uart.h new file mode 100755 index 000000000..636982589 --- /dev/null +++ b/nuttx/arch/arm/src/lpc214x/lpc214x_uart.h @@ -0,0 +1,141 @@ +/************************************************************************************ + * lpc214x/uart.h + * + * 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. + * + ************************************************************************************/ + +#ifndef __LPC214X_UART_H +#define __LPC214X_UART_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include /* For clock settings */ + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/* PINSEL0 bit definitions for UART0/1 */ + +#define LPC214X_UART0_PINSEL 0x00000005 /* PINSEL0 value for UART0 */ +#define LPC214X_UART0_PINMASK 0x0000000f /* PINSEL0 mask for UART0 */ + +#define LPC214X_UART1_PINSEL 0x00050000 /* PINSEL0 value for UART1 */ +#define LPC214X_UART1_PINMASK 0x000f0000 /* PINSEL0 mask for UART1 */ + +/* Derive baud divisor setting from clock settings (see board.h) */ + +#define UART_BAUD(baud) ((LPC214X_FOSC * LPC214X_PLL_M) / (baud * 16)) + +/* Interrupt Enable Register (IER) bit definitions */ + +#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 */ + +/* Interrupt ID Register(IIR) bit definitions */ + +#define LPC214X_IIR_NO_INT (1 << 0) /* No interrupts pending */ +#define LPC214X_IIR_MS_INT (0 << 1) /* MODEM Status */ +#define LPC214X_IIR_THRE_INT (1 << 1) /* Transmit Holding Register Empty */ +#define LPC214X_IIR_RDA_INT (2 << 1) /* Receive Data Available */ +#define LPC214X_IIR_RLS_INT (3 << 1) /* Receive Line Status */ +#define LPC214X_IIR_CTI_INT (6 << 1) /* Character Timeout Indicator */ +#define LPC214X_IIR_MASK 0x0e + +/* FIFO Control Register (FCR) bit definitions */ + +#define LPC214X_FCR_FIFO_ENABLE (1 << 0) /* FIFO wnable */ +#define LPC214X_FCR_RX_FIFO_RESET (1 << 1) /* Reset receive FIFO */ +#define LPC214X_FCR_TX_FIFO_RESET (1 << 2) /* Reset transmit FIFO */ +#define LPC214X_FCR_FIFO_TRIG1 (0 << 6) /* Trigger @1 character in FIFO */ +#define LPC214X_FCR_FIFO_TRIG4 (1 << 6) /* Trigger @4 characters in FIFO */ +#define LPC214X_FCR_FIFO_TRIG8 (2 << 6) /* Trigger @8 characters in FIFO */ +#define LPC214X_FCR_FIFO_TRIG14 (3 << 6) /* Trigger @14 characters in FIFO */ + +/* Line Control Register (LCR) bit definitions */ + +#define LPC214X_LCR_CHAR_5 (0 << 0) /* 5-bit character length */ +#define LPC214X_LCR_CHAR_6 (1 << 0) /* 6-bit character length */ +#define LPC214X_LCR_CHAR_7 (2 << 0) /* 7-bit character length */ +#define LPC214X_LCR_CHAR_8 (3 << 0) /* 8-bit character length */ +#define LPC214X_LCR_STOP_1 (0 << 2) /* 1 stop bit */ +#define LPC214X_LCR_STOP_2 (1 << 2) /* 2 stop bits */ +#define LPC214X_LCR_PAR_NONE (0 << 3) /* No parity */ +#define LPC214X_LCR_PAR_ODD (1 << 3) /* Odd parity */ +#define LPC214X_LCR_PAR_EVEN (3 << 3) /* Even parity */ +#define LPC214X_LCR_PAR_MARK (5 << 3) /* Mark "1" parity */ +#define LPC214X_LCR_PAR_SPACE (7 << 3) /* Space "0" parity */ +#define LPC214X_LCR_BREAK_ENABLE (1 << 6) /* Output BREAK */ +#define LPC214X_LCR_DLAB_ENABLE (1 << 7) /* Enable divisor latch access */ + +/* Modem Control Register (MCR) bit definitions */ + +#define LPC214X_MCR_DTR (1 << 0) /* Data terminal ready */ +#define LPC214X_MCR_RTS (1 << 1) /* Request to send */ +#define LPC214X_MCR_LB (1 << 4) /* Loopback */ + +/* Line Status Register (LSR) bit definitions */ + +#define LPC214X_LSR_RDR (1 << 0) /* Receive data ready */ +#define LPC214X_LSR_OE (1 << 1) /* Overrun error */ +#define LPC214X_LSR_PE (1 << 2) /* Parity error */ +#define LPC214X_LSR_FE (1 << 3) /* Framing error */ +#define LPC214X_LSR_BI (1 << 4) /* Break interrupt */ +#define LPC214X_LSR_THRE (1 << 5) /* THR empty */ +#define LPC214X_LSR_TEMT (1 << 6) /* Transmitter empty */ +#define LPC214X_LSR_RXFE (1 << 7) /* Error in receive FIFO */ +#define LPC214X_LSR_ERR_MASK 0x1e + +/* Modem Status Register (MSR) bit definitions */ + +#define LPC214X_MSR_DCTS (1 << 0) /* Delta clear to send */ +#define LPC214X_MSR_DDSR (1 << 1) /* Delta data set ready */ +#define LPC214X_MSR_TERI (1 << 2) /* Trailing edge ring indicator */ +#define LPC214X_MSR_DDCD (1 << 3) /* Delta data carrier detect */ +#define LPC214X_MSR_CTS (1 << 4) /* Clear to send */ +#define LPC214X_MSR_DSR (1 << 5) /* Data set ready */ +#define LPC214X_MSR_RI (1 << 6) /* Ring indicator */ +#define LPC214X_MSR_DCD (1 << 7) /* Data carrier detect */ + +/************************************************************************************ + * Inline Functions + ************************************************************************************/ + +/************************************************************************************ + * Global Function Prototypes + ************************************************************************************/ + +#endif /* __LPC214X_UART_H */ -- cgit v1.2.3