很多人不知道，STM32中内嵌了一段自举程序

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1. // 读取芯片内部flash数据

2. // 地址范围：0x0800 0000 ~ 0x0801 ffff   128K Byte

3. // 循环读取，每次读取16个字节，读取128K Byte /16Byte = 8000 次

4. int base = 0x08000000;

5. for(int i =0;i<8000;i++)

6. {

7. //1.发送读内存命令

8. UartSendHex("11ee");

9. Sleep(5);

10. //2.发送地址和校验和

11. int offer = base + i*16;

12. QString offer_str = QString::number(offer,16);

13. if(offer_str.size()<8)

14. offer_str.insert(0,"0");

15. QString check_str;

16. check_str = getXORresult(offer_str.mid(0,2), offer_str.mid(2,2));

17. check_str = getXORresult(check_str, offer_str.mid(4,2));

18. check_str = getXORresult(check_str, offer_str.mid(6,2));

19. 
    

20. UartSendHex(offer_str+check_str);

21. Sleep(5);

22. //3.发送要读取的字节数和效验和

23. QByteArray ByteNum = "0ff0";

24. UartSendHex(ByteNum);

25. Sleep(5);

26. ui->progressBar->setFormat(QString::fromLocal8Bit("%1%").arg(QString::number((i+1)/10, 'f', 1)));

27. ui->progressBar->setValue((i+1)/10);

28. }

29. 
    

30. 
    

31. // Qt flash数据 转 hex文件算法

32. 
    

33. int t = 0,g = 0;

34. QString text = ui->textEdit_Recv->toPlainText();

35. QStringList number_list = text.split("\n");

36. QStringList result_list;

37. // 遍历字符串列表，滤除全ffff.........结尾，记录行数

38. for(int i = 0; i < number_list.size(); ++i)

39. {

40. if(number_list.at(i) == "ffffffffffffffffffffffffffffffff")

41. {

42. t = i;

43. break;

44. }

45. }

46. // 遍历字符串列表斩断行，滤除改行的 ffff.........

47. text.clear();

48. text = number_list.at(t-1);

49. for(int i =0;i

50. {

51. if((text.at(i) == 'f')&&(text.at(i+1) == 'f')&&(i%2 == 0))

52. {

53. g = i;

54. break;

55. }

56. }

57. // 拼接新的全数据的字符串列表

58. for(int i =0;i

59. {

60. result_list<

61. }

62. if(g!=0)

63. {

64. text = text.remove(g,32-g);

65. 
    

66. result_list<

67. }

68. //生成HEX文件

69. //1.添加 10 字节数

70. text.clear();

71. QStringList result_list1;

72. for(int i = 0; i < t; ++i)

73. {

74. text = result_list.at(i);

75. if(i!=t-1)

76. text = text.insert(0,"10");

77. else

78. {

79. QString str = QString::number(text.size()/2,16);

80. if(str.size()<2)

81. str.insert(0,"0");

82. text = text.insert(0,str);

83. }

84. result_list1 << text;

85. }

86. //2.添加地址偏移

87. QStringList result_list2;

88. int offer = 0x0000;

89. QString offer_str;

90. text.clear();

91. for(int i = 0; i < t; ++i)

92. {

93. offer = i*16;

94. offer_str = QString::number(offer,16);

95. if(offer_str.size()<4)

96. {

97. if(offer_str.size() == 1)

98. offer_str.insert(0,"000");

99. if(offer_str.size() == 2)

100. offer_str.insert(0,"00");

101. if(offer_str.size() == 3)

102. offer_str.insert(0,"0");

103. }

104. text = result_list1.at(i);

105. text = text.insert(2,offer_str);

106. result_list2 << text;

107. }

108. //3.添加效验和

109. // 以020000040003F7为例子

110. //具体算法为 0x100-((0x02+0x00+0x00+0x04+0x00+0x03)%256)= 0xF7

111. text.clear();

112. bool ok;

113. int check;

114. QString check_str;

115. QStringList result_list3;

116. 
     

117. for(int i = 0; i < t; ++i)

118. {

119. text = result_list2.at(i);

120. check = 0;

121. for(int j=0;j

122. {

123. check += text.mid(j*2,2).toInt(&ok,16);

124. }

125. check = (0x100 - check%256);

126. check_str = QString::number(check,16);

127. if(check_str.size()<2)

128. check_str = check_str.insert(0,"0");

129. text = text.insert(text.size(),check_str);

130. result_list3<

131. }

132. //4.添加冒号 :

133. QStringList result_list4;

134. text.clear();

135. for(int i = 0; i < t; ++i)

136. {

137. text = result_list3.at(i);

138. text = text.insert(0,":");

139. result_list4<

140. }

141. //5.添加HEX头部

142. QString hear=":020000040800f2";

143. //QStringList result_list5;

144. result_list4.insert(0,hear);

145. //6.添加HEX尾部

146. QString tail1=":04000005080001cd21";

147. QString tail2=":00000001ff";

148. result_list4.insert(t+2,tail1);

149. result_list4.insert(t+3,tail2);

150. //7.保存数据为.hex文件

151. ...............