238 lines
7.9 KiB
Plaintext
238 lines
7.9 KiB
Plaintext
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C51 COMPILER V9.59.0.0 IIC 02/24/2024 21:37:53 PAGE 1
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C51 COMPILER V9.59.0.0, COMPILATION OF MODULE IIC
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OBJECT MODULE PLACED IN .\Objects\iic.obj
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COMPILER INVOKED BY: D:\Keil_v5\C51\BIN\C51.EXE ..\Driver\iic.c OPTIMIZE(8,SPEED) BROWSE INCDIR(..\Driver) DEBUG OBJECTE
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-XTEND PRINT(.\Listings\iic.lst) TABS(2) OBJECT(.\Objects\iic.obj)
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line level source
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1 /* # I2C代码片段说明
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2 1. 本文件夹中提供的驱动代码供参赛选手完成程序设计参考。
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3 2. 参赛选手可以自行编写相关代码或以该代码为基础，根据所选单片机类型<E7B1BB><E59E8B>
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-<2D>运行速度和试题
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4 中对单片机时钟频率的要求，进行代码调试和修改。
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5 */
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6 #include "iic.h"
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7 #include "intrins.h"
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8 #define DELAY_TIME 5
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9 sbit scl = P2 ^ 0;
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10 sbit sda = P2 ^ 1;
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11 //
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12 static void I2C_Delay(unsigned char n)
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13 {
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14 1 do
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15 1 {
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16 2 _nop_();
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17 2 _nop_();
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18 2 _nop_();
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19 2 _nop_();
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20 2 _nop_();
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21 2 _nop_();
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22 2 _nop_();
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23 2 _nop_();
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24 2 _nop_();
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25 2 _nop_();
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26 2 _nop_();
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27 2 _nop_();
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28 2 _nop_();
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29 2 _nop_();
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30 2 _nop_();
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31 2 } while (n--);
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32 1 }
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33
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34 //
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35 void I2CStart(void)
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36 {
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37 1 sda = 1;
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38 1 scl = 1;
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39 1 I2C_Delay(DELAY_TIME);
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40 1 sda = 0;
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41 1 I2C_Delay(DELAY_TIME);
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42 1 scl = 0;
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43 1 }
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44
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45 //
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46 void I2CStop(void)
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47 {
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48 1 sda = 0;
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49 1 scl = 1;
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50 1 I2C_Delay(DELAY_TIME);
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51 1 sda = 1;
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52 1 I2C_Delay(DELAY_TIME);
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53 1 }
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C51 COMPILER V9.59.0.0 IIC 02/24/2024 21:37:53 PAGE 2
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54
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55 //
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56 void I2CSendByte(unsigned char byt)
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57 {
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58 1 unsigned char i;
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59 1
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60 1 for (i = 0; i < 8; i++)
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61 1 {
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62 2 scl = 0;
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63 2 I2C_Delay(DELAY_TIME);
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64 2 if (byt & 0x80)
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65 2 {
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66 3 sda = 1;
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67 3 }
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68 2 else
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69 2 {
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70 3 sda = 0;
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71 3 }
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72 2 I2C_Delay(DELAY_TIME);
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73 2 scl = 1;
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74 2 byt <<= 1;
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75 2 I2C_Delay(DELAY_TIME);
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76 2 }
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77 1
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78 1 scl = 0;
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79 1 }
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80
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81 //
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82 unsigned char I2CReceiveByte(void)
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83 {
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84 1 unsigned char da;
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85 1 unsigned char i;
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86 1 for (i = 0; i < 8; i++)
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87 1 {
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88 2 scl = 1;
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89 2 I2C_Delay(DELAY_TIME);
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90 2 da <<= 1;
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91 2 if (sda)
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92 2 da |= 0x01;
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93 2 scl = 0;
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94 2 I2C_Delay(DELAY_TIME);
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95 2 }
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96 1 return da;
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97 1 }
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98
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99 //
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100 unsigned char I2CWaitAck(void)
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101 {
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102 1 unsigned char ackbit;
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103 1
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104 1 scl = 1;
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105 1 I2C_Delay(DELAY_TIME);
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106 1 ackbit = sda;
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107 1 scl = 0;
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108 1 I2C_Delay(DELAY_TIME);
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109 1
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110 1 return ackbit;
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111 1 }
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112
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113 //
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114 void I2CSendAck(unsigned char ackbit)
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115 {
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C51 COMPILER V9.59.0.0 IIC 02/24/2024 21:37:53 PAGE 3
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116 1 scl = 0;
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117 1 sda = ackbit;
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118 1 I2C_Delay(DELAY_TIME);
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119 1 scl = 1;
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120 1 I2C_Delay(DELAY_TIME);
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121 1 scl = 0;
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122 1 sda = 1;
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123 1 I2C_Delay(DELAY_TIME);
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124 1 }
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125
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126 unsigned char Ad_Read(unsigned char addr)
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127 {
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128 1 unsigned char temp;
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129 1 // 选择芯片为PCF
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130 1 I2CStart();
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131 1 I2CSendByte(0x90);
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132 1 I2CWaitAck();
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133 1 I2CSendByte(addr);
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134 1 I2CWaitAck();
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135 1 I2CStart();
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136 1 I2CSendByte(0x91);
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137 1 I2CWaitAck();
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138 1 temp = I2CReceiveByte();
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139 1 I2CSendAck(1);
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140 1 I2CStop();
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141 1 return temp;
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142 1 }
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143 // 写入的值是数字值0-255，而不是模拟值
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144 void Da_Write(unsigned char dat)
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145 {
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146 1 // 选择芯片为PCF
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147 1 I2CStart();
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148 1 I2CSendByte(0x90);
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149 1 I2CWaitAck();
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150 1
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151 1 I2CSendByte(0x41);
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152 1 I2CWaitAck();
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153 1 I2CSendByte(dat);
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154 1 I2CWaitAck();
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155 1 I2CStop();
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156 1 }
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157
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158 /// @brief EEPROM 写函数
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159 /// @param EEPROM_String 写入的数组指针（如果只写入一个数据，那么要用&data）
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160 /// @param addr 8的倍数
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161 /// @param num 写入的数组大小
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162 void EEPROM_Write(unsigned char *EEPROM_String, unsigned char addr, unsigned char num)
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163 {
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164 1 // 选择芯片为EEPROM，模式为写
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165 1 I2CStart();
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166 1 I2CSendByte(0xA0);
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167 1 I2CWaitAck();
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168 1
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169 1 I2CSendByte(addr); // 写入的数据的地址
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170 1 I2CWaitAck();
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171 1 while (num--)
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172 1 {
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173 2 I2CSendByte(*EEPROM_String++);
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174 2 I2CWaitAck();
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175 2 I2C_Delay(200);
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176 2 }
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177 1 I2CStop();
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C51 COMPILER V9.59.0.0 IIC 02/24/2024 21:37:53 PAGE 4
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178 1 }
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179 /// @brief EEPROM 读函数
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180 /// @param EEPROM_String 读取的数组指针（如果只读取一个数据，那么要用&data）
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181 /// @param addr 8的倍数
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182 /// @param num 读取的数组大小
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183 void EEPROM_Read(unsigned char *EEPROM_String, unsigned char addr, unsigned char num)
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184 {
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185 1 // 选择芯片为EEPROM，模式为写
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186 1 I2CStart();
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187 1 I2CSendByte(0xA0);
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188 1 I2CWaitAck();
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189 1
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190 1 I2CSendByte(addr);
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191 1 I2CWaitAck();
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192 1
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193 1 // 选择芯片为EEPROM，模式为读
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194 1 I2CStart();
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195 1 I2CSendByte(0xA1);
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196 1 I2CWaitAck();
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197 1 while (num--)
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198 1 {
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199 2 *EEPROM_String++ = I2CReceiveByte();
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200 2 if (num)
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201 2 I2CSendAck(0);
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202 2 else
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203 2 I2CSendAck(1); // 停止读取
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204 2 }
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205 1 I2CStop();
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206 1 }
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MODULE INFORMATION: STATIC OVERLAYABLE
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CODE SIZE = 378 ----
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CONSTANT SIZE = ---- ----
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XDATA SIZE = ---- ----
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PDATA SIZE = ---- ----
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DATA SIZE = ---- 10
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IDATA SIZE = ---- ----
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BIT SIZE = ---- ----
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END OF MODULE INFORMATION.
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C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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