/* * Contiki PIC32 Port project * * Copyright (c) 2012, * Scuola Superiore Sant'Anna (http://www.sssup.it) and * Consorzio Nazionale Interuniversitario per le Telecomunicazioni * (http://www.cnit.it). * * All rights reserved. * * 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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. * */ /** * \addtogroup pic32 PIC32 Contiki Port * * @{ */ /** * \file pic32_uart.c * \brief UART Interface for PIC32MX (pic32mx795f512l) * \author Giovanni Pellerano * \date 2012-03-21 */ /* * PIC32MX795F512L - Specific Functions * * All the functions in this part of the file are specific for the * pic32mx795f512l that is characterized by registers' name that differ from * the 3xx and 4xx families of the pic32mx. */ #define __UART_CODE_TEST__ 0 #if __UART_CODE_TEST__ #define __USE_UART__ 1 #define __USE_UART_PORT1A__ 1 #define __USE_UART_PORT1B__ 1 #define __USE_UART_PORT2A__ 1 #define __USE_UART_PORT2B__ 1 #define __USE_UART_PORT3A__ 1 #define __USE_UART_PORT3B__ 1 #endif /* __UART_CODE_TEST__ */ #ifdef __USE_UART__ #include #include #include #include #include "contiki.h" #include "dev/leds.h" /*---------------------------------------------------------------------------*/ #define UART_PORT_INIT_XA(XX, YY, ZZ) \ int8_t \ pic32_uart##XX##A_init(uint32_t baudrate, uint16_t byte_format) \ { \ /* Disable Interrupts: RX, TX, ERR */ \ IEC##ZZ##CLR = _IEC##ZZ##_U##XX##AEIE_MASK | _IEC##ZZ##_U##XX##ATXIE_MASK | _IEC##ZZ##_U##XX##ARXIE_MASK; \ IFS##ZZ##CLR = _IFS##ZZ##_U##XX##AEIF_MASK | _IFS##ZZ##_U##XX##ATXIF_MASK | _IFS##ZZ##_U##XX##ARXIF_MASK; \ \ /* Clear thant Set Pri and Sub priority */ \ IPC##YY##CLR = _IPC##YY##_U##XX##AIP_MASK | _IPC##YY##_U##XX##AIS_MASK; \ IPC##YY##SET = (6 << _IPC##YY##_U##XX##AIP_POSITION) | (0 << _IPC##YY##_U##XX##AIS_POSITION); \ \ /* Mode Register Reset (this also stops UART) */ \ U##XX##AMODE = 0; \ \ /* Use BRGH = 1: 4 divisor */ \ U##XX##AMODESET = _U##XX##AMODE_BRGH_MASK; \ U##XX##ABRG = pic32_clock_calculate_brg(4, baudrate); \ \ U##XX##AMODESET = byte_format & 0x07; /* Number of bit, Parity and Stop bits */ \ \ /* Status bits */ \ U##XX##ASTA = 0; \ U##XX##ASTASET = _U##XX##ASTA_URXEN_MASK | _U##XX##ASTA_UTXEN_MASK; /* Enable RX and TX */ \ \ IEC##ZZ##SET = _IEC##ZZ##_U##XX##ARXIE_MASK; \ \ /* Enable UART port */ \ U##XX##AMODESET = _U##XX##AMODE_UARTEN_MASK; \ \ return UART_NO_ERROR; \ } /*---------------------------------------------------------------------------*/ #define UART_PORT_INIT_XB(XX, YY, ZZ) \ int8_t \ pic32_uart##XX##B_init(uint32_t baudrate, uint16_t byte_format) \ { \ /* Disable Interrupts: RX, TX, ERR */ \ IEC##ZZ##CLR = _IEC##ZZ##_U##XX##BEIE_MASK | _IEC##ZZ##_U##XX##BTXIE_MASK | _IEC##ZZ##_U##XX##BRXIE_MASK; \ IFS##ZZ##CLR = _IFS##ZZ##_U##XX##BEIF_MASK | _IFS##ZZ##_U##XX##BTXIF_MASK | _IFS##ZZ##_U##XX##BRXIF_MASK; \ \ /* Clear thant Set Pri and Sub priority */ \ IPC##YY##CLR = _IPC##YY##_U##XX##BIP_MASK | _IPC##YY##_U##XX##BIS_MASK; \ IPC##YY##SET = (6 << _IPC##YY##_U##XX##BIP_POSITION) | (0 << _IPC##YY##_U##XX##BIS_POSITION); \ \ /* Mode Register Reset (this also stops UART) */ \ U##XX##BMODE = 0; \ \ /* Use BRGH = 1: 4 divisor */ \ U##XX##BMODESET = _U##XX##BMODE_BRGH_MASK; \ U##XX##BBRG = pic32_clock_calculate_brg(4, baudrate); \ \ U##XX##BMODESET = byte_format & 0x07; /* Number of bit, Parity and Stop bits */ \ \ /* Status bits */ \ U##XX##BSTA = 0; \ U##XX##BSTASET = _U##XX##BSTA_URXEN_MASK | _U##XX##BSTA_UTXEN_MASK; /* Enable RX and TX */ \ \ IEC##ZZ##SET = _IEC##ZZ##_U##XX##BRXIE_MASK; \ \ /* Enable UART port */ \ U##XX##BMODESET = _U##XX##BMODE_UARTEN_MASK; \ \ return UART_NO_ERROR; \ } /*---------------------------------------------------------------------------*/ #define UART_PORT(XX, YY) \ \ int8_t \ pic32_uart##XX##_write(uint8_t data) \ { \ volatile uint8_t wait; \ \ do { \ wait = U##XX##STAbits.UTXBF; \ } while(wait); \ \ U##XX##TXREG = data; \ \ return UART_NO_ERROR; \ } /*---------------------------------------------------------------------------*/ #ifdef __USE_UART_PORT1A__ UART_PORT(1A, 0) UART_PORT_INIT_XA(1, 6, 0) #endif /* __USE_UART_PORT1A__ */ #ifdef __USE_UART_PORT1B__ UART_PORT(1B, 2) UART_PORT_INIT_XB(1, 12, 2) #endif /* __USE_UART_PORT1B__ */ #ifdef __USE_UART_PORT2A__ UART_PORT(2A, 1) UART_PORT_INIT_XA(2, 7, 1) #endif /* __USE_UART_PORT2A__ */ #ifdef __USE_UART_PORT2B__ UART_PORT(2B, 2) UART_PORT_INIT_XB(2, 12, 2) #endif /* __USE_UART_PORT2B__ */ #ifdef __USE_UART_PORT3A__ UART_PORT(3A, 1) UART_PORT_INIT_XA(3, 8, 1) #endif /* __USE_UART_PORT3A__ */ #ifdef __USE_UART_PORT3B__ UART_PORT(3B, 2) UART_PORT_INIT_XB(3, 12, 2) #endif /* __USE_UART_PORT3B__ */ #endif /* __USE_UART__ */ /** @} */