6c6013b898
* We can now very easily switch between UART0 and UART1 through a define * We can also configure the UART RX and TX port/pin through defines
390 lines
18 KiB
C
390 lines
18 KiB
C
/*
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* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
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* All rights reserved.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software 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 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc2538
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* @{
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*
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* \defgroup cc2538-uart cc2538 UART
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*
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* Driver for the cc2538 UART controller
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* @{
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*
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* \file
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* Header file for the cc2538 UART driver
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*/
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#ifndef UART_H_
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#define UART_H_
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#include "contiki.h"
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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/** \name UART base addresses
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* @{
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*/
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#define UART_0_BASE 0x4000C000
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#define UART_1_BASE 0x4000D000
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/* Default to UART 0 unless the configuration tells us otherwise */
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#ifdef UART_CONF_BASE
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#define UART_BASE UART_CONF_BASE
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#else
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#define UART_BASE UART_0_BASE
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#endif
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/** @} */
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/*---------------------------------------------------------------------------*/
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/**
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* \name Baud rate defines
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*
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* Used in uart_init() to set the values of UART_IBRD and UART_FBRD in order to
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* achieve some standard baud rates. These defines assume that the UART is
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* clocked at 16MHz and that Clock Div is 16 (UART_CTL:HSE clear)
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* @{
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*/
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#define UART_IBRD_115200 8 /**< IBRD value for baud rate 115200 */
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#define UART_FBRD_115200 44 /**< FBRD value for baud rate 115200 */
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#define UART_IBRD_230400 4 /**< IBRD value for baud rate 230400 */
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#define UART_FBRD_230400 22 /**< FBRD value for baud rate 230400 */
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#define UART_IBRD_460800 2 /**< IBRD value for baud rate 460800 */
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#define UART_FBRD_460800 11 /**< FBRD value for baud rate 460800 */
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#if UART_CONF_BAUD_RATE==115200
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#define UART_CONF_IBRD UART_IBRD_115200
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#define UART_CONF_FBRD UART_FBRD_115200
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#elif UART_CONF_BAUD_RATE==230400
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#define UART_CONF_IBRD UART_IBRD_230400
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#define UART_CONF_FBRD UART_FBRD_230400
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#elif UART_CONF_BAUD_RATE==460800
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#define UART_CONF_IBRD UART_IBRD_460800
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#define UART_CONF_FBRD UART_FBRD_460800
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#else /* Bail out with an error unless the user provided custom values */
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#if !(defined UART_CONF_IBRD && defined UART_CONF_FBRD)
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#error "UART baud rate misconfigured and custom IBRD/FBRD values not provided"
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#error "Check the value of UART_CONF_BAUD_RATE in contiki-conf.h or project-conf.h"
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#error "Supported values are 115200, 230400 and 460800. Alternatively, you can"
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#error "provide custom values for UART_CONF_IBRD and UART_CONF_FBRD"
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#endif
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#endif
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART Register Offsets
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* @{
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*/
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#define UART_DR 0x00000000 /**< UART data */
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#define UART_RSR 0x00000004 /**< UART RX status and err clear */
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#define UART_ECR 0x00000004 /**< UART RX status and err clear */
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#define UART_FR 0x00000018 /**< UART flag */
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#define UART_ILPR 0x00000020 /**< UART IrDA low-power */
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#define UART_IBRD 0x00000024 /**< UART BAUD divisor: integer */
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#define UART_FBRD 0x00000028 /**< UART BAUD divisor: fractional */
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#define UART_LCRH 0x0000002C /**< UART line control */
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#define UART_CTL 0x00000030 /**< UART control */
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#define UART_IFLS 0x00000034 /**< UART interrupt FIFO level */
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#define UART_IM 0x00000038 /**< UART interrupt mask */
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#define UART_RIS 0x0000003C /**< UART raw interrupt status */
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#define UART_MIS 0x00000040 /**< UART masked interrupt status */
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#define UART_ICR 0x00000044 /**< UART interrupt clear */
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#define UART_DMACTL 0x00000048 /**< UART DMA control */
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#define UART_LCTL 0x00000090 /**< UART LIN control */
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#define UART_LSS 0x00000094 /**< UART LIN snap shot */
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#define UART_LTIM 0x00000098 /**< UART LIN timer */
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#define UART_NINEBITADDR 0x000000A4 /**< UART 9-bit self address */
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#define UART_NINEBITAMASK 0x000000A8 /**< UART 9-bit self address mask */
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#define UART_PP 0x00000FC0 /**< UART peripheral properties */
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#define UART_CC 0x00000FC8 /**< UART clock configuration */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_DR Register Bit-Masks
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* @{
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*/
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#define UART_DR_OE 0x00000800 /**< UART overrun error */
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#define UART_DR_BE 0x00000400 /**< UART break error */
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#define UART_DR_PE 0x00000200 /**< UART parity error */
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#define UART_DR_FE 0x00000100 /**< UART framing error */
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#define UART_DR_DATA 0x000000FF /**< Data transmitted or received */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_RSR Register Bit-Masks
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* @{
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*/
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#define UART_RSR_OE 0x00000008 /**< UART overrun error */
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#define UART_RSR_BE 0x00000004 /**< UART break error */
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#define UART_RSR_PE 0x00000002 /**< UART parity error */
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#define UART_RSR_FE 0x00000001 /**< UART framing error */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_ECR Register Bit-Masks
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* @{
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*/
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#define UART_ECR_DATA 0x000000FF /**< Error clear */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_FR Register Bit-Masks
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* @{
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*/
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#define UART_FR_TXFE 0x00000080 /**< UART transmit FIFO empty */
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#define UART_FR_RXFF 0x00000040 /**< UART receive FIFO full */
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#define UART_FR_TXFF 0x00000020 /**< UART transmit FIFO full */
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#define UART_FR_RXFE 0x00000010 /**< UART receive FIFO empty */
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#define UART_FR_BUSY 0x00000008 /**< UART busy */
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#define UART_FR_CTS 0x00000001 /**< Clear to send */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_ILPR Register Bit-Masks
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* @{
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*/
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#define UART_ILPR_ILPDVSR 0x000000FF /**< IrDA low-power divisor */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_IBRD Register Bit-Masks
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* @{
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*/
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#define UART_IBRD_DIVINT 0x0000FFFF /**< Integer baud-rate divisor */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_FPRD Register Bit-Masks
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* @{
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*/
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#define UART_FBRD_DIVFRAC 0x0000003F /**< Fractional baud-rate divisor */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_LCRH Register Bit-Masks
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* @{
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*/
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#define UART_LCRH_SPS 0x00000080 /**< UART stick parity select */
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#define UART_LCRH_WLEN 0x00000060 /**< UART word length */
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#define UART_LCRH_FEN 0x00000010 /**< UART enable FIFOs */
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#define UART_LCRH_STP2 0x00000008 /**< UART two stop bits select */
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#define UART_LCRH_EPS 0x00000004 /**< UART even parity select */
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#define UART_LCRH_PEN 0x00000002 /**< UART parity enable */
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#define UART_LCRH_BRK 0x00000001 /**< UART send break */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_LCRH_WLEN Values
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* @{
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*/
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#define UART_LCRH_WLEN_8 0x00000060
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#define UART_LCRH_WLEN_7 0x00000040
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#define UART_LCRH_WLEN_6 0x00000020
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#define UART_LCRH_WLEN_5 0x00000000
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_CTL Register Bit-Masks
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* @{
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*/
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#define UART_CTL_RXE 0x00000200 /**< UART receive enable */
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#define UART_CTL_TXE 0x00000100 /**< UART transmit enable */
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#define UART_CTL_LBE 0x00000080 /**< UART loop back enable */
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#define UART_CTL_LIN 0x00000040 /**< LIN mode enable */
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#define UART_CTL_HSE 0x00000020 /**< High-speed enable */
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#define UART_CTL_EOT 0x00000010 /**< End of transmission */
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#define UART_CTL_SMART 0x00000008 /**< ISO 7816 Smart Card support */
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#define UART_CTL_SIRLP 0x00000004 /**< UART SIR low-power mode */
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#define UART_CTL_SIREN 0x00000002 /**< UART SIR enable */
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#define UART_CTL_UARTEN 0x00000001 /**< UART enable */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_IFLS Register Bit-Masks
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* @{
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*/
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#define UART_IFLS_RXIFLSEL 0x00000038 /**< UART RX FIFO level select */
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#define UART_IFLS_TXIFLSEL 0x00000007 /**< UART TX FIFO level select */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_IFLS_RXIFLSEL Possible Values
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* @{
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*/
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#define UART_IFLS_RXIFLSEL_7_8 0x00000020 /**< UART RX FIFO >= 7/8 full */
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#define UART_IFLS_RXIFLSEL_3_4 0x00000018 /**< UART RX FIFO >= 3/4 full */
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#define UART_IFLS_RXIFLSEL_1_2 0x00000010 /**< UART RX FIFO >= 1/2 full */
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#define UART_IFLS_RXIFLSEL_1_4 0x00000008 /**< UART RX FIFO >= 1/4 full */
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#define UART_IFLS_RXIFLSEL_1_8 0x00000000 /**< UART RX FIFO >= 1/8 full */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_IFLS_TXIFLSEL Possible Values
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* @{
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*/
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#define UART_IFLS_TXIFLSEL_1_8 0x00000004 /**< UART TX FIFO >= 1/8 empty */
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#define UART_IFLS_TXIFLSEL_1_4 0x00000003 /**< UART TX FIFO >= 1/4 empty */
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#define UART_IFLS_TXIFLSEL_1_2 0x00000002 /**< UART TX FIFO >= 1/2 empty */
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#define UART_IFLS_TXIFLSEL_3_4 0x00000001 /**< UART TX FIFO >= 3/4 empty */
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#define UART_IFLS_TXIFLSEL_7_8 0x00000000 /**< UART TX FIFO >= 7/8 empty */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_IM Register Bit-Masks
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* @{
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*/
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#define UART_IM_LME5IM 0x00008000 /**< LIN mode edge 5 intr mask */
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#define UART_IM_LME1IM 0x00004000 /**< LIN mode edge 1 intr mask */
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#define UART_IM_LMSBIM 0x00002000 /**< LIN mode sync break mask */
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#define UART_IM_NINEBITIM 0x00001000 /**< 9-bit mode interrupt mask */
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#define UART_IM_OEIM 0x00000400 /**< UART overrun error mask */
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#define UART_IM_BEIM 0x00000200 /**< UART break error mask */
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#define UART_IM_PEIM 0x00000100 /**< UART parity error mask */
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#define UART_IM_FEIM 0x00000080 /**< UART framing error */
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#define UART_IM_RTIM 0x00000040 /**< UART receive time-out mask */
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#define UART_IM_TXIM 0x00000020 /**< UART transmit intr mask */
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#define UART_IM_RXIM 0x00000010 /**< UART receive interrupt mask */
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#define UART_IM_CTSIM 0x00000002 /**< UART CTS modem mask */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_RIS Register Bit-Masks
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* @{
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*/
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#define UART_RIS_LME5RIS 0x00008000 /**< LIN mode edge 5 raw */
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#define UART_RIS_LME1RIS 0x00004000 /**< LIN mode edge 1 raw */
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#define UART_RIS_LMSBRIS 0x00002000 /**< LIN mode sync break raw */
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#define UART_RIS_NINEBITRIS 0x00001000 /**< 9-bit mode raw intr */
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#define UART_RIS_OERIS 0x00000400 /**< UART overrun error raw */
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#define UART_RIS_BERIS 0x00000200 /**< UART break error raw */
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#define UART_RIS_PERIS 0x00000100 /**< UART parity error raw */
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#define UART_RIS_FERIS 0x00000080 /**< UART framing error raw */
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#define UART_RIS_RTRIS 0x00000040 /**< UART RX time-out raw */
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#define UART_RIS_TXRIS 0x00000020 /**< UART transmit raw */
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#define UART_RIS_RXRIS 0x00000010 /**< UART receive raw */
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#define UART_RIS_CTSRIS 0x00000002 /**< UART CTS modem */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_RIS Register Bit-Masks
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* @{
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*/
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#define UART_MIS_LME5MIS 0x00008000 /**< LIN mode edge 5 masked stat */
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#define UART_MIS_LME1MIS 0x00004000 /**< LIN mode edge 1 masked stat */
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#define UART_MIS_LMSBMIS 0x00002000 /**< LIN mode sync br masked stat */
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#define UART_MIS_NINEBITMIS 0x00001000 /**< 9-bit mode masked stat */
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#define UART_MIS_OEMIS 0x00000400 /**< UART overrun err masked stat */
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#define UART_MIS_BEMIS 0x00000200 /**< UART break err masked stat */
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#define UART_MIS_PEMIS 0x00000100 /**< UART parity err masked stat */
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#define UART_MIS_FEMIS 0x00000080 /**< UART framing err masked stat */
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#define UART_MIS_RTMIS 0x00000040 /**< UART RX time-out masked stat */
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#define UART_MIS_TXMIS 0x00000020 /**< UART TX masked intr stat */
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#define UART_MIS_RXMIS 0x00000010 /**< UART RX masked intr stat */
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#define UART_MIS_CTSMIS 0x00000002 /**< UART CTS modem masked stat */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_ICR Register Bit-Masks
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* @{
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*/
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#define UART_ICR_LME5IC 0x00008000 /**< LIN mode edge 5 intr clear */
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#define UART_ICR_LME1IC 0x00004000 /**< LIN mode edge 1 intr clear */
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#define UART_ICR_LMSBIC 0x00002000 /**< LIN mode sync br intr clear */
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#define UART_ICR_NINEBITIC 0x00001000 /**< 9-bit mode intr clear */
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#define UART_ICR_OEIC 0x00000400 /**< Overrun error intr clear */
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#define UART_ICR_BEIC 0x00000200 /**< Break error intr clear */
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#define UART_ICR_PEIC 0x00000100 /**< Parity error intr clear */
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#define UART_ICR_FEIC 0x00000080 /**< Framing error intr clear */
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#define UART_ICR_RTIC 0x00000040 /**< Receive time-out intr clear */
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#define UART_ICR_TXIC 0x00000020 /**< Transmit intr clear */
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#define UART_ICR_RXIC 0x00000010 /**< Receive intr clear */
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#define UART_ICR_CTSIC 0x00000002 /**< UART CTS modem intr clear */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_DMACTL Register Bit-Masks
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* @{
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*/
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#define UART_DMACTL_DMAERR 0x00000004 /**< DMA on error */
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#define UART_DMACTL_TXDMAE 0x00000002 /**< Transmit DMA enable */
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#define UART_DMACTL_RXDMAE 0x00000001 /**< Receive DMA enable */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_LCTL Register Bit-Masks
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* @{
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*/
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#define UART_LCTL_BLEN 0x00000030 /**< Sync break length */
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#define UART_LCTL_MASTER 0x00000001 /**< LIN master enable */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_LSS Register Bit-Masks
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* @{
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*/
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#define UART_LSS_TSS 0x0000FFFF /**< Timer snap shot */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_LTIM Register Bit-Masks
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* @{
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*/
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#define UART_LTIM_TIMER 0x0000FFFF /**< Timer value */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_O_NINEBITADDR Register Bit-Masks
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* @{
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*/
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#define UART_NINEBITADDR_NINEBITEN 0x00008000 /**< Enable 9-bit mode */
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#define UART_NINEBITADDR_ADDR 0x000000FF /**< Self address for 9-bit mode */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_O_NINEBITADDR Register Bit-Masks
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* @{
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*/
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#define UART_NINEBITAMASK_RANGE 0x0000FF00 /**< Self addr range, 9-bit mode */
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#define UART_NINEBITAMASK_MASK 0x000000FF /**< Self addr mask, 9-bit mode */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_PP Register Bit-Masks
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* @{
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*/
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#define UART_PP_NB 0x00000002 /**< 9-bit support */
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#define UART_PP_SC 0x00000001 /**< Smart card support */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART_CC Register Bit-Masks
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* @{
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*/
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#define UART_CC_CS 0x00000007 /**< UART BAUD & sys clock source */
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name UART functions
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* @{
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*/
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/** \brief Initialises the UART controller, configures I/O control
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* and interrupts */
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void uart_init(void);
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/** \brief Sends a single character down the UART
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* \param b The character to transmit
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*/
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void uart_write_byte(uint8_t b);
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/** \brief Assigns a callback to be called when the UART receives a byte
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* \param input A pointer to the function
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*/
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void uart_set_input(int (* input)(unsigned char c));
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/** @} */
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#endif /* UART_H_ */
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/**
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* @}
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* @}
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*/
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