Nut/OS  4.10.3
API Reference
at91_dbgu.c
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00001 /*
00002  * Copyright (C) 2001-2006 by egnite Software GmbH
00003  * Copyright (C) 2010-2011 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(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 
00063 #ifdef NUT_DEV_DEBUG_READ
00064 
00065 #define NUT_DEV_DEBUG_ENA   (US_RXEN | US_TXEN)
00066 #if defined (PA9_DRXD_A) && defined (PA10_DTXD_A)
00067 #define NUT_DEV_DEBUG_PINS  (_BV(PA9_DRXD_A) | _BV(PA10_DTXD_A))
00068 #elif defined (PA27_DRXD_A) && defined (PA28_DTXD_A)
00069 #define NUT_DEV_DEBUG_PINS  (_BV(PA27_DRXD_A) | _BV(PA28_DTXD_A))
00070 #elif defined (PB14_DRXD_A) && defined (PB15_DTXD_A)
00071 #define NUT_DEV_DEBUG_PINS  (_BV(PB14_DRXD_A) | _BV(PB15_DTXD_A))
00072 #define NUT_DEV_DEBUG_PDR   PIOB_PDR
00073 #endif
00074 
00075 #else
00076 
00077 #define NUT_DEV_DEBUG_ENA   US_TXEN
00078 #if defined (PA10_DTXD_A)
00079 #define NUT_DEV_DEBUG_PINS  _BV(PA10_DTXD_A)
00080 #elif defined (PA28_DTXD_A)
00081 #define NUT_DEV_DEBUG_PINS  _BV(PA28_DTXD_A)
00082 #elif defined (PB15_DTXD_A)
00083 #define NUT_DEV_DEBUG_PINS  _BV(PB15_DTXD_A)
00084 #define NUT_DEV_DEBUG_PDR   PIOB_PDR
00085 #endif
00086 
00087 #endif
00088 
00089 #ifndef NUT_DEV_DEBUG_PDR
00090 #define NUT_DEV_DEBUG_PDR   PIOA_PDR
00091 #endif
00092 
00098 static int DebugInit(NUTDEVICE * dev)
00099 {
00100 #if NUT_DEV_DEBUG_PINS
00101     /* Disable GPIO on UART tx/rx pins. */
00102     outr(NUT_DEV_DEBUG_PDR, NUT_DEV_DEBUG_PINS);
00103 #endif
00104 
00105     /* Reset UART. */
00106     outr(DBGU_CR, US_RSTRX | US_RSTTX | US_RXDIS | US_TXDIS);
00107     /* Disable all UART interrupts. */
00108     outr(DBGU_IDR, 0xFFFFFFFF);
00109 
00110 #if NUT_DEV_DEBUG_SPEED
00111     /* Set UART baud rate generator register. */
00112     outr(DBGU_BRGR, At91BaudRateDiv(NUT_DEV_DEBUG_SPEED));
00113 #endif
00114 
00115     /* Set UART mode to 8 data bits, no parity and 1 stop bit. */
00116     outr(DBGU_MR, US_CHMODE_NORMAL | US_CHRL_8 | US_PAR_NO | US_NBSTOP_1);
00117 
00118     /* Enable UART transmitter and optionally the receiver. */
00119     outr(DBGU_CR, NUT_DEV_DEBUG_ENA);
00120 
00121     return 0;
00122 }
00123 
00124 static NUTFILE dbgfile;
00125 
00129 NUTDEVICE devDebug = {
00130     0,                          
00131     {'d', 'b', 'g', 'u', 0, 0, 0, 0, 0}
00132     ,                           
00133     0,                          
00134     DBGU_BASE,                  
00135     0,                          
00136     0,                          
00137     &dbgfile,                   
00138     DebugInit,                  
00139     At91DevDebugIOCtl,          
00140 #ifdef NUT_DEV_DEBUG_READ
00141     At91DevDebugRead,           
00142 #else
00143     0,
00144 #endif
00145     At91DevDebugWrite,          
00146     At91DevDebugOpen,           
00147     At91DevDebugClose,          
00148 #ifdef NUT_DEV_DEBUG_READ
00149     At91DevDebugSize
00150 #else
00151     0                           
00152 #endif
00153 };
00154 
00155 #endif /* DBGU_BASE */
00156