annotate OtherSources/data_central_mini.c @ 551:e3237f580ae9

Added viewport functionality: The viewport shall estimate if the user is looking at the display (in focus) or not. This is done by vector calculation using roll, pitch and yaw angles. The first usecase is to enable the motion detection feature: It is only active if the user is looking at the display. Still in development state => deactivated by compile switch
author Ideenmodellierer
date Sun, 08 Nov 2020 18:43:19 +0100
parents 7801c5d8a562
children
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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 gmbh
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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>&copy; 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 ;-) *hw */
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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