Nut/OS  4.10.3
API Reference
at91_dbg1.c
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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/atmel/debug_at91.h>
00047 
00048 #if defined(USART1_BASE)
00049 
00054 
00055 #ifndef NUT_DEV_DEBUG_SPEED
00056 #ifdef UART1_INIT_BAUDRATE
00057 #define NUT_DEV_DEBUG_SPEED UART1_INIT_BAUDRATE
00058 #else
00059 #define NUT_DEV_DEBUG_SPEED 115200
00060 #endif
00061 #endif
00062 
00068 static int Debug1Init(NUTDEVICE * dev)
00069 {
00070     /* Enable UART clock. */
00071 #if defined (PS_PCER)
00072     outr(PS_PCER, _BV(US1_ID));
00073 #elif defined (PMC_PCER)
00074     outr(PMC_PCER, _BV(US1_ID));
00075 #endif
00076     /* Disable GPIO on UART tx/rx pins. */
00077 #if defined (P22_RXD1) && defined (P21_TXD1)
00078     outr(PIO_PDR, _BV(P22_RXD1) | _BV(P21_TXD1));
00079 #elif defined (PA5_RXD1_A) && defined (PA6_TXD1_A)
00080     outr(PIOA_PDR, _BV(PA5_RXD1_A) | _BV(PA6_TXD1_A));
00081 #elif defined (PA21_RXD1_A) && defined (PA22_TXD1_A)
00082     outr(PIOA_PDR, _BV(PA21_RXD1_A) | _BV(PA22_TXD1_A));
00083 #endif
00084     /* Reset UART. */
00085     outr(US1_CR, US_RSTRX | US_RSTTX | US_RXDIS | US_TXDIS);
00086     /* Disable all UART interrupts. */
00087     outr(US1_IDR, 0xFFFFFFFF);
00088 #if defined (US1_RCR) && defined(US1_TCR)
00089     /* Clear UART counter registers. */
00090     outr(US1_RCR, 0);
00091     outr(US1_TCR, 0);
00092 #endif
00093 #if NUT_DEV_DEBUG_SPEED
00094     /* Set UART baud rate generator register. */
00095     outr(US1_BRGR, At91BaudRateDiv(NUT_DEV_DEBUG_SPEED));
00096 #endif
00097     /* Set UART mode to 8 data bits, no parity and 1 stop bit. */
00098     outr(US1_MR, US_CHMODE_NORMAL | US_CHRL_8 | US_PAR_NO | US_NBSTOP_1);
00099     /* Enable UART receiver and transmitter. */
00100     outr(US1_CR, US_RXEN | US_TXEN);
00101 
00102     return 0;
00103 }
00104 
00105 static NUTFILE dbgfile1;
00106 
00110 NUTDEVICE devDebug1 = {
00111     0,                          
00112     {'u', 'a', 'r', 't', '1', 0, 0, 0, 0}
00113     ,                           
00114     0,                          
00115     USART1_BASE,                
00116     0,                          
00117     0,                          
00118     &dbgfile1,                  
00119     Debug1Init,                 
00120     At91DevDebugIOCtl,          
00121     0,                          
00122     At91DevDebugWrite,          
00123     At91DevDebugOpen,           
00124     At91DevDebugClose,          
00125     0                           
00126 };
00127 
00128 #endif /* USART1_BASE */
00129