00001 /* 00002 * Copyright (C) 2001-2006 by egnite Software GmbH 00003 * Copyright (C) 2010 by egnite GmbH 00004 * 00005 * All rights reserved. 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions 00009 * are met: 00010 * 00011 * 1. Redistributions of source code must retain the above copyright 00012 * notice, this list of conditions and the following disclaimer. 00013 * 2. Redistributions in binary form must reproduce the above copyright 00014 * notice, this list of conditions and the following disclaimer in the 00015 * documentation and/or other materials provided with the distribution. 00016 * 3. Neither the name of the copyright holders nor the names of 00017 * contributors may be used to endorse or promote products derived 00018 * from this software without specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00021 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00022 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00023 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 00024 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00025 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00026 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00027 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00028 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00029 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00030 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00031 * SUCH DAMAGE. 00032 * 00033 * For additional information see http://www.ethernut.de/ 00034 */ 00035 00045 #include <cfg/uart.h> 00046 #include <arch/arm/debug_at91.h> 00047 00048 #if defined(DBGU_BASE) 00049 00054 00055 #ifndef NUT_DEV_DEBUG_SPEED 00056 #ifdef UARTD_INIT_BAUDRATE 00057 #define NUT_DEV_DEBUG_SPEED UARTD_INIT_BAUDRATE 00058 #else 00059 #define NUT_DEV_DEBUG_SPEED 115200 00060 #endif 00061 #endif 00062 00068 static int DebugInit(NUTDEVICE * dev) 00069 { 00070 /* Disable GPIO on UART tx/rx pins. */ 00071 #if defined (PA9_DRXD_A) && defined (PA10_DTXD_A) 00072 outr(PIOA_PDR, _BV(PA9_DRXD_A) | _BV(PA10_DTXD_A)); 00073 #elif defined (PA27_DRXD_A) && defined (PA28_DTXD_A) 00074 outr(PIOA_PDR, _BV(PA27_DRXD_A) | _BV(PA28_DTXD_A)); 00075 #endif 00076 /* Reset UART. */ 00077 outr(DBGU_CR, US_RSTRX | US_RSTTX | US_RXDIS | US_TXDIS); 00078 /* Disable all UART interrupts. */ 00079 outr(DBGU_IDR, 0xFFFFFFFF); 00080 #if NUT_DEV_DEBUG_SPEED 00081 /* Set UART baud rate generator register. */ 00082 outr(DBGU_BRGR, At91BaudRateDiv(NUT_DEV_DEBUG_SPEED)); 00083 #endif 00084 /* Set UART mode to 8 data bits, no parity and 1 stop bit. */ 00085 outr(DBGU_MR, US_CHMODE_NORMAL | US_CHRL_8 | US_PAR_NO | US_NBSTOP_1); 00086 /* Enable UART receiver and transmitter. */ 00087 outr(DBGU_CR, US_RXEN | US_TXEN); 00088 00089 return 0; 00090 } 00091 00092 static NUTFILE dbgfile; 00093 00097 NUTDEVICE devDebug = { 00098 0, 00099 {'d', 'b', 'g', 'u', 0, 0, 0, 0, 0} 00100 , 00101 0, 00102 DBGU_BASE, 00103 0, 00104 0, 00105 &dbgfile, 00106 DebugInit, 00107 At91DevDebugIOCtl, 00108 0, 00109 At91DevDebugWrite, 00110 At91DevDebugOpen, 00111 At91DevDebugClose, 00112 0 00113 }; 00114 00115 #endif /* DBGU_BASE */ 00116