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 00070 #include <dev/irqreg.h> 00071 00076 00077 static int AvrTimer1CompAIrqCtl(int cmd, void *param); 00078 00079 IRQ_HANDLER sig_OUTPUT_COMPARE1A = { 00080 #ifdef NUT_PERFMON 00081 0, /* Interrupt counter, ir_count. */ 00082 #endif 00083 NULL, /* Passed argument, ir_arg. */ 00084 NULL, /* Handler subroutine, ir_handler. */ 00085 AvrTimer1CompAIrqCtl /* Interrupt control, ir_ctl. */ 00086 }; 00087 00103 static int AvrTimer1CompAIrqCtl(int cmd, void *param) 00104 { 00105 int rc = 0; 00106 u_int *ival = (u_int *) param; 00107 int enabled = bit_is_set(TIMSK, OCIE1A); 00108 00109 /* Disable interrupt. */ 00110 cbi(TIMSK, OCIE1A); 00111 00112 switch (cmd) { 00113 case NUT_IRQCTL_INIT: 00114 enabled = 0; 00115 case NUT_IRQCTL_CLEAR: 00116 /* Clear any pending interrupt. */ 00117 outb(TIFR, _BV(OCF1A)); 00118 break; 00119 case NUT_IRQCTL_STATUS: 00120 if (bit_is_set(TIFR, OCF1A)) { 00121 *ival = 1; 00122 } else { 00123 *ival = 0; 00124 } 00125 if (enabled) { 00126 *ival |= 0x80; 00127 } 00128 break; 00129 case NUT_IRQCTL_ENABLE: 00130 enabled = 1; 00131 break; 00132 case NUT_IRQCTL_DISABLE: 00133 enabled = 0; 00134 break; 00135 case NUT_IRQCTL_GETPRIO: 00136 *ival = 11; 00137 break; 00138 #ifdef NUT_PERFMON 00139 case NUT_IRQCTL_GETCOUNT: 00140 *ival = (u_int) sig_OUTPUT_COMPARE1A.ir_count; 00141 sig_OUTPUT_COMPARE1A.ir_count = 0; 00142 break; 00143 #endif 00144 default: 00145 rc = -1; 00146 break; 00147 } 00148 00149 /* Enable interrupt. */ 00150 if (enabled) { 00151 sbi(TIMSK, OCIE1A); 00152 } 00153 return rc; 00154 } 00155 00159 #ifdef __IMAGECRAFT__ 00160 #pragma interrupt_handler SIG_OUTPUT_COMPARE1A:iv_TIMER1_COMPA 00161 #endif 00162 NUTSIGNAL(SIG_OUTPUT_COMPARE1A, sig_OUTPUT_COMPARE1A) 00163 00164 00165