diff options
Diffstat (limited to 'ChibiOS_16.1.5/community/os/various/crcsw.c')
| -rw-r--r-- | ChibiOS_16.1.5/community/os/various/crcsw.c | 338 |
1 files changed, 0 insertions, 338 deletions
diff --git a/ChibiOS_16.1.5/community/os/various/crcsw.c b/ChibiOS_16.1.5/community/os/various/crcsw.c deleted file mode 100644 index 02a64f3..0000000 --- a/ChibiOS_16.1.5/community/os/various/crcsw.c +++ /dev/null @@ -1,338 +0,0 @@ -/* - ChibiOS - Copyright (C) 2015 Michael D. Spradling - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. -*/ - -/** - * @file crcsw.c - * @brief CRC software driver. - @note SW implementation was based from: - * @note http://www.barrgroup.com/Embedded-Systems/How-To/CRC-Calculation-C-Code - * - * @addtogroup CRC - * @{ - */ - -#include "hal.h" - -#if HAL_USE_CRC || defined(__DOXYGEN__) - -#if CRCSW_USE_CRC1 || defined(__DOXYGEN__) - -/*===========================================================================*/ -/* Driver local definitions. */ -/*===========================================================================*/ - -/** - * @brief CRC default configuration. - */ - -#if CRCSW_CRC32_TABLE == TRUE || defined(__DOXYGEN__) -static const uint32_t crc32_table[256] = { - 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, - 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, - 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, - 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, - 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, - 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, - 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, - 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, - 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, - 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, - 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, - 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, - 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, - 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, - 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, - 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, - 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, - 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, - 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, - 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, - 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, - 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, - 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, - 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, - 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, - 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, - 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, - 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, - 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, - 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, - 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, - 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, - 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, - 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, - 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, - 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, - 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, - 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, - 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, - 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, - 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, - 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, - 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, - 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, - 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, - 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, - 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, - 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, - 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, - 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, - 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, - 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, - 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, - 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, - 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, - 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, - 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, - 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, - 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, - 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, - 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, - 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, - 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, - 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d -}; -#endif - -#if CRCSW_CRC16_TABLE || defined(__DOXYGEN__) -static const uint32_t crc16_table[256] = { - 0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241, - 0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440, - 0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40, - 0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841, - 0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40, - 0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41, - 0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641, - 0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040, - 0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240, - 0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441, - 0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41, - 0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840, - 0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41, - 0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40, - 0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640, - 0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041, - 0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240, - 0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441, - 0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41, - 0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840, - 0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41, - 0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40, - 0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640, - 0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041, - 0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241, - 0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440, - 0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40, - 0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841, - 0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40, - 0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41, - 0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641, - 0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040 -}; -#endif - -/*===========================================================================*/ -/* Driver exported variables. */ -/*===========================================================================*/ - -/** @brief CRC1 driver identifier.*/ -#if CRCSW_USE_CRC1 || defined(__DOXYGEN__) -CRCDriver CRCD1; -#endif - -#if CRCSW_CRC32_TABLE || defined(__DOXYGEN__) -const CRCConfig crcsw_crc32_config = { - .poly_size = 32, - .poly = 0x04C11DB7, - .initial_val = 0xFFFFFFFF, - .final_val = 0xFFFFFFFF, - .reflect_data = 1, - .reflect_remainder = 1, - .table = crc32_table -}; -#endif - -#if CRCSW_CRC16_TABLE || defined(__DOXYGEN__) -const CRCConfig crcsw_crc16_config = { - .poly_size = 16, - .poly = 0x8005, - .initial_val = 0x0, - .final_val = 0x0, - .reflect_data = 1, - .reflect_remainder = 1, - .table = crc16_table -}; -#endif - -/*===========================================================================*/ -/* Driver local variables and types. */ -/*===========================================================================*/ - -/*===========================================================================*/ -/* Driver local functions. */ -/*===========================================================================*/ - -#if (CRCSW_PROGRAMMABLE == TRUE) -static uint32_t reflect(uint32_t data, uint8_t nBits) { - uint32_t reflection = 0x00000000; - uint8_t bit; - - /* Reflect the data about the center bit. */ - for (bit = 0; bit < nBits; ++bit) { - /* If the LSB bit is set, set the reflection of it. */ - if (data & 0x01) { - reflection |= (1 << ((nBits - 1) - bit)); - } - - data = (data >> 1); - } - - return reflection; -} -#endif - -/*===========================================================================*/ -/* Driver interrupt handlers. */ -/*===========================================================================*/ - -/*===========================================================================*/ -/* Driver exported functions. */ -/*===========================================================================*/ - -/** - * @brief Low level CRC software initialization. - * - * @notapi - */ -void crc_lld_init(void) { - crcObjectInit(&CRCD1); - CRCD1.crc = CRCD1.config->initial_val; -} - -/** - * @brief Configures and activates the CRC peripheral. - * - * @param[in] crcp pointer to the @p CRCDriver object - * - * @notapi - */ -void crc_lld_start(CRCDriver *crcp) { - osalDbgAssert(crcp->config != NULL, "config must not be NULL"); - -#if CRCSW_PROGRAMMABLE == FALSE -#if CRCSW_CRC32_TABLE == TRUE && CRCSW_CRC16_TABLE == TRUE - osalDbgAssert((crcp->config == CRCSW_CRC32_TABLE_CONFIG) || - (crcp->config == CRCSW_CRC16_TABLE_CONFIG), "config must be CRCSW_CRC32_TABLE_CONFIG or CRCSW_CRC16_TABLE_CONFIG"); -#elif CRCSW_CRC32_TABLE == TRUE && CRCSW_CRC16_TABLE == FALSE - osalDbgAssert(crcp->config == CRCSW_CRC32_TABLE_CONFIG, - "config must be CRCSW_CRC32_TABLE_CONFIG"); -#else - osalDbgAssert(crcp->config == CRCSW_CRC16_TABLE_CONFIG, - "config must be CRCSW_CRC16_TABLE_CONFIG"); -#endif -#endif - crc_lld_reset(crcp); -} - - -/** - * @brief Deactivates the CRC peripheral. - * - * @param[in] crcp pointer to the @p CRCDriver object - * - * @notapi - */ -void crc_lld_stop(CRCDriver *crcp) { - (void)crcp; -} - -/** - * @brief Resets current CRC calculation. - * - * @param[in] crcp pointer to the @p CRCDriver object - * - * @notapi - */ -void crc_lld_reset(CRCDriver *crcp) { - crcp->crc = crcp->config->initial_val; -} - -/** - * @brief Returns calculated CRC from last reset - * - * @param[in] crcp pointer to the @p CRCDriver object - * @param[in] n size of buf in bytes - * @param[in] buf @p buffer location - * - * @notapi - */ -uint32_t crc_lld_calc(CRCDriver *crcp, size_t n, const void *buf) { - uint32_t i; - uint32_t crc; -#if (CRCSW_CRC32_TABLE == TRUE) || (CRCSW_CRC16_TABLE == TRUE) - if (crcp->config->table != NULL) { - for (i = 0; i < n; i++) { - uint8_t data = *((uint8_t*)buf + i); - uint8_t idx = (crcp->crc ^ data); - crcp->crc = (crcp->config->table[idx] ^ (crcp->crc >> 8)); - } - crc = crcp->crc; - } -#endif - -#if (CRCSW_PROGRAMMABLE == TRUE) - // Mask off bits to poly size - uint32_t mask = 1 << (crcp->config->poly_size - 1); - mask |= (mask - 1); - - crc = crcp->crc; - if (crcp->config->table == NULL) { - for (i = 0; i < n; i++) { - uint8_t data = *((uint8_t*)buf + i); - uint8_t bit; - - if (crcp->config->reflect_data) { - data = reflect(data, 8); - } - - /* Bring the next byte into the remainder. */ - crc ^= (data << (crcp->config->poly_size - 8)); - - /* Perform modulo-2 division, a bit at a time. */ - for (bit = 8; bit > 0; --bit) { - /* Try to divide the current data bit. */ - if (crc & (1 << (crcp->config->poly_size - 1))) { - crc = (crc << 1) ^ crcp->config->poly; - } else { - crc <<= 1; - } - } - } - - crcp->crc = crc; - - if (crcp->config->reflect_remainder) { - crc = reflect(crc, crcp->config->poly_size); - } - } -#endif - - return (crc ^ crcp->config->final_val) & mask; -} - -#endif /* CRCSW_USE_CRC1 */ - -#endif /* HAL_USE_CRC */ |