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5
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1 /**
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2 ******************************************************************************
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3 * @copyright heinrichs weikamp
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4 * @file data_central_mini.c - bootloader only -
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5 * @author heinrichs/weikamp, Christian Weikamp
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6 * @date 10-November-2014
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7 * @version V1.0.3
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8 * @since 10-Nov-2014
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9 * @brief
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10 * @bug
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11 * @warning
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12 @verbatim
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13
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14 @endverbatim
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15 ******************************************************************************
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16 * @attention
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17 *
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18 * <h2><center>© COPYRIGHT(c) 2015 heinrichs weikamp</center></h2>
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19 *
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20 ******************************************************************************
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21 */
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22
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23 /* Includes ------------------------------------------------------------------*/
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24 #include <string.h>
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25 #include "data_central.h"
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26 #include "stm32f4xx_hal.h"
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27 #include "crcmodel.h"
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28
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29 void translateDate(uint32_t datetmpreg, RTC_DateTypeDef *sDate)
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30 {
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31 datetmpreg = (uint32_t)(datetmpreg & RTC_DR_RESERVED_MASK);
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32
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33 /* Fill the structure fields with the read parameters */
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34 sDate->Year = (uint8_t)((datetmpreg & (RTC_DR_YT | RTC_DR_YU)) >> 16);
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35 sDate->Month = (uint8_t)((datetmpreg & (RTC_DR_MT | RTC_DR_MU)) >> 8);
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36 sDate->Date = (uint8_t)(datetmpreg & (RTC_DR_DT | RTC_DR_DU));
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37 sDate->WeekDay = (uint8_t)((datetmpreg & (RTC_DR_WDU)) >> 13);
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38
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39 /* Convert the date structure parameters to Binary format */
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40 sDate->Year = (uint8_t)RTC_Bcd2ToByte(sDate->Year);
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41 sDate->Month = (uint8_t)RTC_Bcd2ToByte(sDate->Month);
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42 sDate->Date = (uint8_t)RTC_Bcd2ToByte(sDate->Date);
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43 }
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44
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45 void translateTime(uint32_t tmpreg, RTC_TimeTypeDef *sTime)
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46 {
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47 tmpreg = (uint32_t)(tmpreg & RTC_TR_RESERVED_MASK);
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48
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49 /* Fill the structure fields with the read parameters */
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50 sTime->Hours = (uint8_t)((tmpreg & (RTC_TR_HT | RTC_TR_HU)) >> 16);
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51 sTime->Minutes = (uint8_t)((tmpreg & (RTC_TR_MNT | RTC_TR_MNU)) >>8);
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52 sTime->Seconds = (uint8_t)(tmpreg & (RTC_TR_ST | RTC_TR_SU));
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53 sTime->TimeFormat = (uint8_t)((tmpreg & (RTC_TR_PM)) >> 16);
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54
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55 /* Convert the time structure parameters to Binary format */
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56 sTime->Hours = (uint8_t)RTC_Bcd2ToByte(sTime->Hours);
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57 sTime->Minutes = (uint8_t)RTC_Bcd2ToByte(sTime->Minutes);
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58 sTime->Seconds = (uint8_t)RTC_Bcd2ToByte(sTime->Seconds);
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59 sTime->SubSeconds = 0;
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60 }
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61
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62
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63 /* This is derived from crc32b but does table lookup. First the table
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64 itself is calculated, if it has not yet been set up.
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65 Not counting the table setup (which would probably be a separate
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66 function), when compiled to Cyclops with GCC, this function executes in
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67 7 + 13n instructions, where n is the number of bytes in the input
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68 message. It should be doable in 4 + 9n instructions. In any case, two
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69 of the 13 or 9 instrucions are load byte.
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70 This is Figure 14-7 in the text. */
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71
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72 /* http://www.hackersdelight.org/ i guess ;-) *chsw */
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73
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74 uint32_t crc32c_checksum(uint8_t* message, uint16_t length, uint8_t* message2, uint16_t length2) {
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75 int i, j;
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76 uint32_t byte, crc, mask;
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77 static unsigned int table[256] = {0};
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78
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79 /* Set up the table, if necessary. */
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80 if (table[1] == 0) {
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81 for (byte = 0; byte <= 255; byte++) {
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82 crc = byte;
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83 for (j = 7; j >= 0; j--) { // Do eight times.
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84 mask = -(crc & 1);
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85 crc = (crc >> 1) ^ (0xEDB88320 & mask);
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86 }
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87 table[byte] = crc;
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88 }
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89 }
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90
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91 /* Through with table setup, now calculate the CRC. */
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92 i = 0;
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93 crc = 0xFFFFFFFF;
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94 while (length--) {
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95 byte = message[i];
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96 crc = (crc >> 8) ^ table[(crc ^ byte) & 0xFF];
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97 i = i + 1;
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98 }
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99 if(length2)
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100 {
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101 i = 0;
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102 while (length2--) {
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103 byte = message2[i];
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104 crc = (crc >> 8) ^ table[(crc ^ byte) & 0xFF];
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105 i = i + 1;
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106 }
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107 }
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108 return ~crc;
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109 }
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110
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111
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112 uint32_t CRC_CalcBlockCRC_moreThan768000(uint32_t *buffer1, uint32_t *buffer2, uint32_t words)
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113 {
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114 cm_t crc_model;
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115 uint32_t word_to_do;
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116 uint8_t byte_to_do;
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117 int i;
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118
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119 // Values for the STM32F generator.
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120
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121 crc_model.cm_width = 32; // 32-bit CRC
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122 crc_model.cm_poly = 0x04C11DB7; // CRC-32 polynomial
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123 crc_model.cm_init = 0xFFFFFFFF; // CRC initialized to 1's
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124 crc_model.cm_refin = FALSE; // CRC calculated MSB first
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125 crc_model.cm_refot = FALSE; // Final result is not bit-reversed
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126 crc_model.cm_xorot = 0x00000000; // Final result XOR'ed with this
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127
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128 cm_ini(&crc_model);
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129
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130 while (words--)
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131 {
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132 // The STM32F10x hardware does 32-bit words at a time!!!
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133 if(words > (768000/4))
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134 word_to_do = *buffer2++;
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135 else
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136 word_to_do = *buffer1++;
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137
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138 // Do all bytes in the 32-bit word.
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139
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140 for (i = 0; i < sizeof(word_to_do); i++)
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141 {
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142 // We calculate a *byte* at a time. If the CRC is MSB first we
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143 // do the next MS byte and vica-versa.
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144
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145 if (crc_model.cm_refin == FALSE)
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146 {
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147 // MSB first. Do the next MS byte.
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148
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149 byte_to_do = (uint8_t) ((word_to_do & 0xFF000000) >> 24);
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150 word_to_do <<= 8;
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151 }
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152 else
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153 {
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154 // LSB first. Do the next LS byte.
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155
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156 byte_to_do = (uint8_t) (word_to_do & 0x000000FF);
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157 word_to_do >>= 8;
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158 }
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159
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160 cm_nxt(&crc_model, byte_to_do);
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161 }
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162 }
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163
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164 // Return the final result.
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165
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166 return (cm_crc(&crc_model));
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167 }
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168
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169
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170 uint32_t CRC_CalcBlockCRC(uint32_t *buffer, uint32_t words)
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171 {
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172 cm_t crc_model;
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173 uint32_t word_to_do;
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174 uint8_t byte_to_do;
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175 int i;
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176
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177 // Values for the STM32F generator.
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178
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179 crc_model.cm_width = 32; // 32-bit CRC
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180 crc_model.cm_poly = 0x04C11DB7; // CRC-32 polynomial
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181 crc_model.cm_init = 0xFFFFFFFF; // CRC initialized to 1's
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182 crc_model.cm_refin = FALSE; // CRC calculated MSB first
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183 crc_model.cm_refot = FALSE; // Final result is not bit-reversed
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184 crc_model.cm_xorot = 0x00000000; // Final result XOR'ed with this
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185
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186 cm_ini(&crc_model);
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187
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188 while (words--)
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189 {
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190 // The STM32F10x hardware does 32-bit words at a time!!!
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191
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192 word_to_do = *buffer++;
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193
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194 // Do all bytes in the 32-bit word.
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195
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196 for (i = 0; i < sizeof(word_to_do); i++)
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197 {
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198 // We calculate a *byte* at a time. If the CRC is MSB first we
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199 // do the next MS byte and vica-versa.
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200
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201 if (crc_model.cm_refin == FALSE)
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202 {
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203 // MSB first. Do the next MS byte.
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204
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205 byte_to_do = (uint8_t) ((word_to_do & 0xFF000000) >> 24);
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206 word_to_do <<= 8;
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207 }
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208 else
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209 {
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210 // LSB first. Do the next LS byte.
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211
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212 byte_to_do = (uint8_t) (word_to_do & 0x000000FF);
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213 word_to_do >>= 8;
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214 }
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215
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216 cm_nxt(&crc_model, byte_to_do);
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217 }
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218 }
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219
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220 // Return the final result.
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221
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222 return (cm_crc(&crc_model));
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223 }
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224
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