Many changes from 2018

[owSlave2.git] / common / OWCRC8_16.s

diff --git a/common/OWCRC8_16.s b/common/OWCRC8_16.s
new file mode 100644 (file)
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+++ b/common/OWCRC8_16.s
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+// Copyright (c) 2017, Tobias Mueller tm(at)tm3d.de\r
+// All rights reserved. \r
+// \r
+// Redistribution and use in source and binary forms, with or without \r
+// modification, are permitted provided that the following conditions are \r
+// met: \r
+// \r
+//  * Redistributions of source code must retain the above copyright \r
+//    notice, this list of conditions and the following disclaimer. \r
+//  * Redistributions in binary form must reproduce the above copyright \r
+//    notice, this list of conditions and the following disclaimer in the \r
+//    documentation and/or other materials provided with the \r
+//    distribution. \r
+//  * All advertising materials mentioning features or use of this \r
+//    software must display the following acknowledgement: This product \r
+//    includes software developed by tm3d.de and its contributors. \r
+//  * Neither the name of tm3d.de nor the names of its contributors may \r
+//    be used to endorse or promote products derived from this software \r
+//    without specific prior written permission. \r
+// \r
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \r
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT \r
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR \r
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT \r
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, \r
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT \r
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, \r
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY \r
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT \r
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE \r
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. \r
+\r
+\r
+.comm crc16,2\r
+.comm crc8,2\r
+#define _CRC8_16_\r
+\r
+CRC16_alg:\r
+       ;crc\r
+       \r
+       lds r_crc,crc16;lade low byte fuer vergleich mit bit\r
+       mov r_temp,r_crc\r
+       andi r_temp,0x01 ;nur bit 0\r
+       cp r_temp2,r_temp  ;r_temp2 wird in interruptroutine gesetzt\r
+       brne crc2_16 ;nur schieben\r
+       ;schieben und XOR\r
+       lds r_temp2,crc16+1\r
+       lsr     r_temp2\r
+       ror     r_crc\r
+       ldi     r_temp, 0x01    \r
+       eor     r_crc, r_temp\r
+       ldi     r_temp, 0xA0    ;\r
+       eor     r_temp2, r_temp\r
+       rjmp crce_16\r
+crc2_16:\r
+       lds r_temp2,crc16+1\r
+       lsr     r_temp2\r
+       ror     r_crc\r
+crce_16:\r
+       sts crc16,r_crc\r
+       sts crc16+1,r_temp2\r
+       \r
+       ret\r
+\r
+.macro CRCS ; CRC beim Senden\r
+       push r_crc\r
+       push r_temp2\r
+       rcall CRC16_alg\r
+       pop r_temp2\r
+               ;crc\r
+       lds r_crc,crc8\r
+       mov r_temp,r_crc\r
+       andi r_temp,0x01\r
+       cp r_temp2,r_temp\r
+       brne crc2_8\r
+       lsr r_crc\r
+       ldi r_temp,0x8c\r
+       eor r_crc,r_temp\r
+       rjmp crce_8\r
+crc2_8:\r
+       lsr r_crc\r
+crce_8:\r
+       sts crc8,r_crc\r
+       pop r_crc\r
+.endm\r
+\r
+.macro CRCR; CRC beim Empfangen\r
+       ;clr r_temp2\r
+       ;sbrc r_rwbyte,7\r
+       ;ldi r_temp2,1\r
+       push r_crc\r
+       rcall CRC16_alg\r
+       pop r_crc\r
+.endm\r
+\r
+.macro CRCInit1; CRC initialisierung bei READ_COMMAND\r
+       ldi r_temp,0\r
+       sts crc16,r_temp\r
+       sts crc16+1,r_temp\r
+.endm\r
+\r
+.macro CRCInit2; CRC initialisierung bei READ_DATA\r
+       ldi r_temp,0\r
+       sts crc8,r_temp\r
+.endm\r