00001 /* 00002 * Copyright (C) 2001-2005 by egnite Software GmbH. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the copyright holders nor the names of 00014 * contributors may be used to endorse or promote products derived 00015 * from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS 00018 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00019 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00020 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE 00021 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00022 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00023 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00024 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00025 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00026 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00027 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00028 * SUCH DAMAGE. 00029 * 00030 * For additional information see http://www.ethernut.de/ 00031 * 00032 */ 00033 00077 #include <dev/irqreg.h> 00078 00083 00084 static int AvrTimer1CompBIrqCtl(int cmd, void *param); 00085 00086 IRQ_HANDLER sig_OUTPUT_COMPARE1B = { 00087 #ifdef NUT_PERFMON 00088 0, /* Interrupt counter, ir_count. */ 00089 #endif 00090 NULL, /* Passed argument, ir_arg. */ 00091 NULL, /* Handler subroutine, ir_handler. */ 00092 AvrTimer1CompBIrqCtl /* Interrupt control, ir_ctl. */ 00093 }; 00094 00110 static int AvrTimer1CompBIrqCtl(int cmd, void *param) 00111 { 00112 int rc = 0; 00113 unsigned int *ival = (unsigned int *) param; 00114 int_fast8_t enabled = bit_is_set(TIMSK, OCIE1B); 00115 00116 /* Disable interrupt. */ 00117 cbi(TIMSK, OCIE1B); 00118 00119 switch (cmd) { 00120 case NUT_IRQCTL_INIT: 00121 enabled = 0; 00122 case NUT_IRQCTL_CLEAR: 00123 /* Clear any pending interrupt. */ 00124 outb(TIFR, _BV(OCF1B)); 00125 break; 00126 case NUT_IRQCTL_STATUS: 00127 if (bit_is_set(TIFR, OCF1B)) { 00128 *ival = 1; 00129 } else { 00130 *ival = 0; 00131 } 00132 if (enabled) { 00133 *ival |= 0x80; 00134 } 00135 break; 00136 case NUT_IRQCTL_ENABLE: 00137 enabled = 1; 00138 break; 00139 case NUT_IRQCTL_DISABLE: 00140 enabled = 0; 00141 break; 00142 case NUT_IRQCTL_GETPRIO: 00143 *ival = 12; 00144 break; 00145 #ifdef NUT_PERFMON 00146 case NUT_IRQCTL_GETCOUNT: 00147 *ival = (unsigned int) sig_OUTPUT_COMPARE1B.ir_count; 00148 sig_OUTPUT_COMPARE1B.ir_count = 0; 00149 break; 00150 #endif 00151 default: 00152 rc = -1; 00153 break; 00154 } 00155 00156 /* Enable interrupt. */ 00157 if (enabled) { 00158 sbi(TIMSK, OCIE1B); 00159 } 00160 return rc; 00161 } 00162 00166 #ifdef __IMAGECRAFT__ 00167 #pragma interrupt_handler SIG_OUTPUT_COMPARE1B:iv_TIMER1_COMPB 00168 #endif 00169 NUTSIGNAL(SIG_OUTPUT_COMPARE1B, sig_OUTPUT_COMPARE1B) 00170 00171 00172