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Split up of util lib into util_hw.c|h and util_generic.c|h.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| <Project name="src_common"><File path="uart.c"></File><File path="uart.h"></File><File path="util.h"></File><File path="aes256.c"></File><File path="aes256.h"></File><File path="e2p_access.c"></File><File path="e2p_access.h"></File><File path="util.c"></File><File path="msggrp_tempsensor.h"></File><File path="msggrp_generic.h"></File><File path="packet_header.h"></File><File path="packet_headerext_ack.h"></File><File path="packet_headerext_ackstatus.h"></File><File path="packet_headerext_get.h"></File><File path="packet_headerext_set.h"></File><File path="packet_headerext_status.h"></File><File path="packet_headerext_setget.h"></File><File path="msggrp_powerswitch.h"></File><File path="packet_headerext_common.h"></File><File path="msggrp_dimmer.h"></File><File path="e2p_basestation.h"></File><File path="e2p_dimmer.h"></File><File path="e2p_generic.h"></File><File path="e2p_hardware.h"></File><File path="e2p_powerswitch.h"></File><File path="e2p_tempsensor.h"></File><File path="e2p_thermostat.h"></File></Project> | ||
| <Project name="src_common"><File path="uart.c"></File><File path="uart.h"></File><File path="aes256.c"></File><File path="aes256.h"></File><File path="e2p_access.c"></File><File path="e2p_access.h"></File><File path="msggrp_tempsensor.h"></File><File path="msggrp_generic.h"></File><File path="packet_header.h"></File><File path="packet_headerext_ack.h"></File><File path="packet_headerext_ackstatus.h"></File><File path="packet_headerext_get.h"></File><File path="packet_headerext_set.h"></File><File path="packet_headerext_status.h"></File><File path="packet_headerext_setget.h"></File><File path="msggrp_powerswitch.h"></File><File path="packet_headerext_common.h"></File><File path="msggrp_dimmer.h"></File><File path="e2p_basestation.h"></File><File path="e2p_dimmer.h"></File><File path="e2p_generic.h"></File><File path="e2p_hardware.h"></File><File path="e2p_powerswitch.h"></File><File path="e2p_tempsensor.h"></File><File path="e2p_thermostat.h"></File><File path="util_generic.c"></File><File path="util_generic.h"></File><File path="util_hw.c"></File><File path="util_hw.h"></File></Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,176 @@ | ||
| /* | ||
| * This file is part of smarthomatic, http://www.smarthomatic.org. | ||
| * Copyright (c) 2013 Uwe Freese | ||
| * | ||
| * Contributors: | ||
| * CRC32: K.Moraw, www.helitron.de, 2009 | ||
| * | ||
| * Development for smarthomatic by Uwe Freese started by adding a | ||
| * function to encrypt and decrypt a byte buffer directly and adding CBC mode. | ||
| * | ||
| * smarthomatic is free software: you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License as published by the | ||
| * Free Software Foundation, either version 3 of the License, or (at your | ||
| * option) any later version. | ||
| * | ||
| * smarthomatic is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | ||
| * Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License along | ||
| * with smarthomatic. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
|
|
||
| #include "util_generic.h" | ||
|
|
||
| // PRECONDITION (which is NOT checked!): min_in < max_in, min_out < max_out | ||
| uint16_t linear_interpolate16(uint16_t in, uint16_t min_in, uint16_t max_in, uint16_t min_out, uint16_t max_out) | ||
| { | ||
| if (in >= max_in) | ||
| return max_out; | ||
| if (in <= min_in) | ||
| return min_out; | ||
| // interpolate | ||
| return min_out + (in - min_in) * (max_out - min_out) / (max_in - min_in); | ||
| } | ||
|
|
||
| uint32_t linear_interpolate32(uint32_t in, uint32_t min_in, uint32_t max_in, uint32_t min_out, uint32_t max_out) | ||
| { | ||
| if (in >= max_in) | ||
| return max_out; | ||
| if (in <= min_in) | ||
| return min_out; | ||
| // interpolate | ||
| return min_out + (in - min_in) * (max_out - min_out) / (max_in - min_in); | ||
| } | ||
|
|
||
| float linear_interpolate_f(float in, float min_in, float max_in, float min_out, float max_out) | ||
| { | ||
| if (in >= max_in) | ||
| return max_out; | ||
| if (in <= min_in) | ||
| return min_out; | ||
| // interpolate | ||
| return min_out + (in - min_in) * (max_out - min_out) / (max_in - min_in); | ||
| } | ||
|
|
||
| // Take one characters and return the hex value it represents (0..15). | ||
| // If characters are not 0..9, a..f, A..F, character is interpreted as 0xf. | ||
| // 0 = 48, 9 = 57 | ||
| // A = 65, F = 70 | ||
| // a = 97, f = 102 | ||
| uint8_t hex_to_byte(char c) | ||
| { | ||
| if (c <= 48) // 0 | ||
| { | ||
| return 0; | ||
| } | ||
| else if (c <= 57) // 1..9 | ||
| { | ||
| return c - 48; | ||
| } | ||
| else if (c <= 65) // A | ||
| { | ||
| return 10; | ||
| } | ||
| else if (c <= 70) // B..F | ||
| { | ||
| return c - 55; | ||
| } | ||
| else if (c <= 97) // a | ||
| { | ||
| return 10; | ||
| } | ||
| else if (c <= 102) // b..f | ||
| { | ||
| return c - 87; | ||
| } | ||
| else // f | ||
| { | ||
| return 15; | ||
| } | ||
| } | ||
|
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||
| uint8_t hex_to_uint8(uint8_t * buf, uint8_t offset) | ||
| { | ||
| return hex_to_byte(buf[offset]) * 16 + hex_to_byte(buf[offset + 1]); | ||
| } | ||
|
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||
|
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||
| // Return a 32 bit value stored in 4 bytes in the buffer at the given offset. | ||
| uint32_t getBuf32(uint8_t offset) | ||
| { | ||
| return ((uint32_t)bufx[offset] << 24) | ((uint32_t)bufx[offset + 1] << 16) | ((uint32_t)bufx[offset + 2] << 8) | ((uint32_t)bufx[offset + 3] << 0); | ||
| } | ||
|
|
||
| // Return a 16 bit value stored in 2 bytes in the buffer at the given offset. | ||
| uint32_t getBuf16(uint8_t offset) | ||
| { | ||
| return ((uint32_t)bufx[offset] << 8) | ((uint32_t)bufx[offset + 1] << 0); | ||
| } | ||
|
|
||
| // write a 32 bit value to the buffer | ||
| void setBuf32(uint8_t offset, uint32_t val) | ||
| { | ||
| bufx[0 + offset] = (val >> 24) & 0xff; | ||
| bufx[1 + offset] = (val >> 16) & 0xff; | ||
| bufx[2 + offset] = (val >> 8) & 0xff; | ||
| bufx[3 + offset] = (val >> 0) & 0xff; | ||
| } | ||
|
|
||
| // write a 16 bit value to the buffer | ||
| void setBuf16(uint8_t offset, uint16_t val) | ||
| { | ||
| bufx[0 + offset] = (val >> 8) & 0xff; | ||
| bufx[1 + offset] = (val >> 0) & 0xff; | ||
| } | ||
|
|
||
| /* | ||
| Grundlagen zu diesen Funktionen wurden der Webseite: | ||
| http://www.cs.waikato.ac.nz/~312/crc.txt | ||
| entnommen (A PAINLESS GUIDE TO CRC ERROR DETECTION ALGORITHMS) | ||
| Algorithmus entsprechend CRC32 fuer Ethernet | ||
| Startwert FFFFFFFF, LSB zuerst | ||
| Im Ergebnis kommt MSB zuerst und alle Bits sind invertiert | ||
| Das Ergebnis wurde geprueft mit dem CRC-Calculator: | ||
| http://www.zorc.breitbandkatze.de/crc.html | ||
| (Einstellung Button CRC-32 waehlen, Daten eingeben und calculate druecken) | ||
| Autor: K.Moraw, www.helitron.de, Oktober 2009 | ||
| */ | ||
|
|
||
| unsigned long reg32; // Schieberegister | ||
|
|
||
| unsigned long crc32_bytecalc(unsigned char byte) | ||
| { | ||
| int i; | ||
| unsigned long polynom = 0xEDB88320; // Generatorpolynom | ||
|
|
||
| for (i = 0; i < 8; ++i) | ||
| { | ||
| if ((reg32&1) != (byte&1)) | ||
| reg32 = (reg32>>1)^polynom; | ||
| else | ||
| reg32 >>= 1; | ||
| byte >>= 1; | ||
| } | ||
| return reg32 ^ 0xffffffff; // inverses Ergebnis, MSB zuerst | ||
| } | ||
|
|
||
| unsigned long crc32(unsigned char *data, int len) | ||
| { | ||
| int i; | ||
| reg32 = 0xffffffff; | ||
|
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||
| for (i = 0; i < len; i++) | ||
| { | ||
| crc32_bytecalc(data[i]); // Berechne fuer jeweils 8 Bit der Nachricht | ||
| } | ||
|
|
||
| return reg32 ^ 0xffffffff; | ||
| } |
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