248 lines
10 KiB
C
248 lines
10 KiB
C
/****************************************************************************
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* arch/arm/src/lpc2378/lpc23xx_uart.h
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*
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* Copyright (C) 2010 Rommel Marcelo. All rights reserved.
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* Author: Rommel Marcelo
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*
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* This file is part of the NuttX RTOS and based on the lpc2148 port:
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_LPC2378_LPC23XX_UART_H
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#define __ARCH_ARM_SRC_LPC2378_LPC23XX_UART_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <arch/board/board.h> /* For clock settings */
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Derive baud divisor setting from clock settings (see board.h) */
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/* --F_in = 57 600 000 Hz U0DLM=0,
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* U0DLL=25, DIVADDVAL=3,
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* MULVAL=12, baudrate=115200, err = 0.000000 %
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*/
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/* --F_in = 57 600 000 Hz U0DLM=1,
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* U0DLL=119, DIVADDVAL=0,
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* MULVAL=1, baudrate=9600, err = 0.000000 %
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*/
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/* Used only if CONFIG_UART_MULVAL is not defined */
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#define DIVADDVAL 0
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#define MULVAL 1
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#define DLMVAL 1
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#define DLLVAL 119
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/* UARTx PCLK divider valid values are 1,2,4 */
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#define U0_PCLKDIV 1
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/* #define U1_PCLKDIV 1 */
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#define U2_PCLKDIV 1
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/* #define U3_PCLKDIV 1 */
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#define U0_PCLK (CCLK / U0_PCLKDIV)
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/* #define U1_PCLK (CCLK / U1_PCLKDIV) */
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#define U2_PCLK (CCLK / U2_PCLKDIV)
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/* #define U3_PCLK (CCLK / U3_PCLKDIV) */
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#define U0_PCLKSEL_MASK (0x000000C0)
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#define U2_PCLKSEL_MASK (0x00030000)
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/* PCKLSEL0 bits 7:6, 00=CCLK/4, 01=CCLK/1 , 10=CCLK/2 */
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#ifdef U0_PCLKDIV
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# if U0_PCLKDIV == 1
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# define U0_PCLKSEL (0x00000040)
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# elif U0_PCLKDIV == 2
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# define U0_PCLKSEL (0x00000080)
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# elif U0_PCLKDIV == 4
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# define U0_PCLKSEL (0x00000000)
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# endif
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#else
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# error "UART0 PCLK divider not set"
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#endif
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/* PCKLSEL1 bits 17:16, 00=CCLK/4, 01=CCLK/1 , 10=CCLK/2 */
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#ifdef U2_PCLKDIV
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# if U2_PCLKDIV == 1
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# define U2_PCLKSEL (0x00010000)
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# elif U2_PCLKDIV == 2
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# define U2_PCLKSEL (0x00020000)
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# elif U2_PCLKDIV == 4
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# define U2_PCLKSEL (0x00000000)
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# endif
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#else
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# error "UART2 PCLK divider not set"
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#endif
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/* Universal Asynchronous Receiver Transmitter Base Addresses */
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#define UART0_BASE_ADDR 0xE000C000
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#define UART1_BASE_ADDR 0xE0010000
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#define UART2_BASE_ADDR 0xE0078000
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#define UART3_BASE_ADDR 0xE007C000
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/* UART 0/1/2/3 Register Offsets */
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#define UART_RBR_OFFSET 0x00 /* R: Receive Buffer Register (DLAB=0) */
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#define UART_THR_OFFSET 0x00 /* W: Transmit Holding Register (DLAB=0) */
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#define UART_DLL_OFFSET 0x00 /* W: Divisor Latch Register (LSB, DLAB=1) */
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#define UART_IER_OFFSET 0x04 /* W: Interrupt Enable Register (DLAB=0) */
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#define UART_DLM_OFFSET 0x04 /* RW: Divisor Latch Register (MSB, DLAB=1) */
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#define UART_IIR_OFFSET 0x08 /* R: Interrupt ID Register */
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#define UART_FCR_OFFSET 0x08 /* W: FIFO Control Register */
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#define UART_LCR_OFFSET 0x0c /* RW: Line Control Register */
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#define UART_MCR_OFFSET 0x10 /* RW: Modem Control REgister (2146/6/8 UART1 Only) */
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#define UART_LSR_OFFSET 0x14 /* R: Scratch Pad Register */
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#define UART_MSR_OFFSET 0x18 /* RW: MODEM Status Register (2146/6/8 UART1 Only) */
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#define UART_SCR_OFFSET 0x1c /* RW: Line Status Register */
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#define UART_ACR_OFFSET 0x20 /* RW: Autobaud Control Register */
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#define UART_FDR_OFFSET 0x28 /* RW: Fractional Divider Register */
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#define UART_TER_OFFSET 0x30 /* RW: Transmit Enable Register */
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/* PINSEL0 bit definitions for UART0/2 */
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#define UART0_PINSEL 0x00000050 /* PINSEL0 value for UART0 */
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#define UART0_PINMASK 0x000000F0 /* PINSEL0 mask for UART0 */
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#define UART1_TX_PINSEL 0x40000000 /* PINSEL0 value for UART1 Tx */
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#define UART1_TXPINMASK 0xC0000000 /* PINSEL0 mask for UART1 Tx */
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#define UART1_RX_PINSEL 0x00000001 /* PINSEL1 value for UART1 Rx */
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#define UART1_RX_PINMASK 0x00000003 /* PINSEL1 mask for UART1 Rx */
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#define UART1_MODEM_PINSEL 0x00001555 /* PINSEL1 mask for UART1 Modem Interface */
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#define UART1_CTS_PINMASK 0x00003FFF /* PINSEL1 mask for UART1 Modem Interface */
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/* #define UART1_CTS_PINSEL 0x00000004 PINSEL1 mask for UART1 CTS */
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/* #define UART1_CTS_PINMASK 0x0000000C PINSEL1 mask for UART1 CTS */
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/* #define UART1_CTS_PINSEL 0x00000010 PINSEL1 mask for UART1 Rx */
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/* #define UART1_CTS_PINMASK 0x00000030 PINSEL1 mask for UART1 Rx */
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#define UART2_PINSEL 0x00500000 /* PINSEL0 value for UART2 */
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#define UART2_PINMASK 0x00F00000 /* PINSEL0 mask for UART2 */
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#define UART3_PINSEL 0x0F000000 /* PINSEL9 value for UART3 */
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#define UART3_PINMASK 0x0F000000 /* PINSEL9 mask for UART3 */
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/* Interrupt Enable Register (IER) bit definitions */
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#define IER_ERBFI (1 << 0) /* Enable receive data available int */
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#define IER_ETBEI (1 << 1) /* Enable THR empty Interrupt */
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#define IER_ELSI (1 << 2) /* Enable receive line status int */
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#define IER_EDSSI (1 << 3) /* Enable MODEM atatus interrupt (2146/6/8 UART1 Only) */
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#define IER_ALLIE 0x0f /* All interrupts */
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/* Interrupt ID Register(IIR) bit definitions */
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#define IIR_NO_INT (1 << 0) /* No interrupts pending */
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#define IIR_MS_INT (0 << 1) /* MODEM Status (UART1 only) */
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#define IIR_THRE_INT (1 << 1) /* Transmit Holding Register Empty */
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#define IIR_RDA_INT (2 << 1) /* Receive Data Available */
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#define IIR_RLS_INT (3 << 1) /* Receive Line Status */
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#define IIR_CTI_INT (6 << 1) /* Character Timeout Indicator */
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#define IIR_MASK 0x0e
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/* FIFO Control Register (FCR) bit definitions */
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#define FCR_FIFO_ENABLE (1 << 0) /* FIFO enable */
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#define FCR_RX_FIFO_RESET (1 << 1) /* Reset receive FIFO */
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#define FCR_TX_FIFO_RESET (1 << 2) /* Reset transmit FIFO */
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#define FCR_FIFO_TRIG1 (0 << 6) /* Trigger @1 character in FIFO */
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#define FCR_FIFO_TRIG4 (1 << 6) /* Trigger @4 characters in FIFO */
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#define FCR_FIFO_TRIG8 (2 << 6) /* Trigger @8 characters in FIFO */
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#define FCR_FIFO_TRIG14 (3 << 6) /* Trigger @14 characters in FIFO */
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/* Line Control Register (LCR) bit definitions */
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#define LCR_CHAR_5 (0 << 0) /* 5-bit character length */
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#define LCR_CHAR_6 (1 << 0) /* 6-bit character length */
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#define LCR_CHAR_7 (2 << 0) /* 7-bit character length */
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#define LCR_CHAR_8 (3 << 0) /* 8-bit character length */
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#define LCR_STOP_1 (0 << 2) /* 1 stop bit */
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#define LCR_STOP_2 (1 << 2) /* 2 stop bits */
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#define LCR_PAR_NONE (0 << 3) /* No parity */
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#define LCR_PAR_ODD (1 << 3) /* Odd parity */
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#define LCR_PAR_EVEN (3 << 3) /* Even parity */
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#define LCR_PAR_MARK (5 << 3) /* Mark "1" parity */
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#define LCR_PAR_SPACE (7 << 3) /* Space "0" parity */
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#define LCR_BREAK_ENABLE (1 << 6) /* Output BREAK */
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#define LCR_DLAB_ENABLE (1 << 7) /* Enable divisor latch access */
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/* Modem Control Register (MCR) bit definitions */
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#define MCR_DTR (1 << 0) /* Data terminal ready */
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#define MCR_RTS (1 << 1) /* Request to send */
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#define MCR_LB (1 << 4) /* Loopback */
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/* Line Status Register (LSR) bit definitions */
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#define LSR_RDR (1 << 0) /* Receive data ready */
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#define LSR_OE (1 << 1) /* Overrun error */
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#define LSR_PE (1 << 2) /* Parity error */
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#define LSR_FE (1 << 3) /* Framing error */
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#define LSR_BI (1 << 4) /* Break interrupt */
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#define LSR_THRE (1 << 5) /* THR empty */
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#define LSR_TEMT (1 << 6) /* Transmitter empty */
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#define LSR_RXFE (1 << 7) /* Error in receive FIFO */
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#define LSR_ERR_MASK 0x1e
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/* Modem Status Register (MSR) bit definitions */
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#define MSR_DCTS (1 << 0) /* Delta clear to send */
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#define MSR_DDSR (1 << 1) /* Delta data set ready */
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#define MSR_TERI (1 << 2) /* Trailing edge ring indicator */
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#define MSR_DDCD (1 << 3) /* Delta data carrier detect */
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#define MSR_CTS (1 << 4) /* Clear to send */
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#define MSR_DSR (1 << 5) /* Data set ready */
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#define MSR_RI (1 << 6) /* Ring indicator */
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#define MSR_DCD (1 << 7) /* Data carrier detect */
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/****************************************************************************
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* Inline Functions
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#endif /* __ARCH_ARM_SRC_LPC2378_LPC23XX_UART_H */
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