00001 /* 00002 * Copyright (C) 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 00074 #include <dev/irqreg.h> 00075 00080 00081 #if defined(SIG_CAN_OVERFLOW1) || defined(iv_CAN_TIM_OVR) 00082 00083 static int AvrCanOvrIrqCtl(int cmd, void *param); 00084 00085 IRQ_HANDLER sig_CAN_OVERRUN = { 00086 #ifdef NUT_PERFMON 00087 0, /* Interrupt counter, ir_count. */ 00088 #endif 00089 NULL, /* Passed argument, ir_arg. */ 00090 NULL, /* Handler subroutine, ir_handler. */ 00091 AvrCanOvrIrqCtl /* Interrupt control, ir_ctl. */ 00092 }; 00093 00102 static int AvrCanOvrIrqCtl(int cmd, void *param) 00103 { 00104 int rc = 0; 00105 unsigned int *ival = (unsigned int *) param; 00106 int_fast8_t enabled = bit_is_set(CANGIE, ENOVRT); 00107 00108 /* Disable interrupt. */ 00109 cbi(CANGIE, ENOVRT); 00110 00111 switch (cmd) { 00112 case NUT_IRQCTL_INIT: 00113 case NUT_IRQCTL_DISABLE: 00114 enabled = 0; 00115 break; 00116 case NUT_IRQCTL_ENABLE: 00117 enabled = 1; 00118 break; 00119 case NUT_IRQCTL_GETPRIO: 00120 *ival = 0; 00121 break; 00122 #ifdef NUT_PERFMON 00123 case NUT_IRQCTL_GETCOUNT: 00124 *ival = (unsigned int) SIG_CAN_OVERFLOW1.ir_count; 00125 SIG_CAN_OVERFLOW1.ir_count = 0; 00126 break; 00127 #endif 00128 default: 00129 rc = -1; 00130 break; 00131 } 00132 00133 /* Enable interrupt. */ 00134 if (enabled) { 00135 sbi(CANGIE, ENOVRT); 00136 } 00137 return rc; 00138 } 00139 00143 #ifdef __IMAGECRAFT__ 00144 #pragma interrupt_handler SIG_CAN_OVERFLOW1:iv_CAN_TIM_OVR 00145 #endif 00146 NUTSIGNAL(SIG_CAN_OVERFLOW1, sig_CAN_OVERRUN) 00147 #endif 00148