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標(biāo)題: AVR內(nèi)部EEPROM讀寫函數(shù) EEPROM.H [打印本頁]
作者: heicc    時間: 2015-1-5 16:36
標(biāo)題: AVR內(nèi)部EEPROM讀寫函數(shù) EEPROM.H
  1. #pragma used+
  2. ///寫單字節(jié)EEPROM
  3. void EEPROM_write(unsigned int uiAddress, unsigned char ucData);

  5. ///讀單字節(jié)EEPROM
  6. unsigned char EEPROM_read(unsigned int uiAddress);

  8. ///寫雙字節(jié)EEPROM
  9. void EEPROM_write2(unsigned int uiAddress, unsigned int ucData);

  11. ///讀雙字節(jié)EEPROM
  12. unsigned int EEPROM_read2(unsigned int uiAddress);

  14. ///讀4字節(jié)EEPROM
  15. unsigned long EEPROM_read4(unsigned int uiAddress);

  17. ///寫4字節(jié)EEPROM
  18. void EEPROM_write4(unsigned int uiAddress, unsigned long ucData);



  22. #pragma used-

  24. #pragma library eeprom.lib

  26. EEPROM.C

  28. //#include "eeprom.h"

  30. /* EEPROM Control Register */
  31. #define    EERIE        3
  32. #define    EEMWE        2
  33. #define    EEWE         1
  34. #define    EERE         0

  36. #if  funcused EEPROM_write
  37. ///寫單字節(jié)EEPROM
  38. void EEPROM_write(unsigned int uiAddress, unsigned char ucData)
  39. {
  40. //#asm("cli")
  41. ////* 等待上一次寫操作結(jié)束
  42. while(EECR & (1<<EEWE));
  43. ////* 設(shè)置地址和數(shù)據(jù)寄存器
  44. EEAR = uiAddress;
  45. EEDR = ucData;
  46. ////* 置位EEMWE
  47. EECR |= (1<<EEMWE);
  48. ////* 置位EEWE 以啟動寫操作
  49. EECR |= (1<<EEWE);

  51. //#asm("sei")
  52. }
  53. #endif


  56. #if  funcused EEPROM_read
  57. ///讀單字節(jié)EEPROM
  58. unsigned char EEPROM_read(unsigned int uiAddress)
  59. {
  60. #asm("cli")
  61. ///* 等待上一次寫操作結(jié)束
  62. while(EECR & (1<<EEWE));
  63. ///* 設(shè)置地址寄存器*/
  64. EEAR = uiAddress;
  65. ///* 設(shè)置EERE 以啟動讀操作
  66. EECR |= (1<<EERE);
  67. ///* 自數(shù)據(jù)寄存器返回數(shù)據(jù)
  68. return EEDR;

  70. //#asm("sei")
  71. }
  72. #endif

  74. #if  funcused EEPROM_read2
  75. ///讀雙字節(jié)EEPROM
  76. unsigned int EEPROM_read2(unsigned int uiAddress)
  77. { unsigned int  ucdata;
  78. // #asm("cli")
  79. ///* 等待上一次寫操作結(jié)束


  82. while(EECR & (1<<EEWE));
  83. ///* 設(shè)置地址寄存器*/
  84. EEAR = uiAddress+1;
  85. ///* 設(shè)置EERE 以啟動讀操作
  86. EECR |= (1<<EERE);
  87. ///* 自數(shù)據(jù)寄存器返回數(shù)據(jù)
  88. ucdata = EEDR;
  89. ucdata =ucdata<<8;

  91. while(EECR & (1<<EEWE));
  92. ///* 設(shè)置地址寄存器*/
  93. EEAR = uiAddress;
  94. ///* 設(shè)置EERE 以啟動讀操作
  95. EECR |= (1<<EERE);
  96. ///* 自數(shù)據(jù)寄存器返回數(shù)據(jù)
  97. ucdata |= EEDR;

  99. return ucdata;
  100. //#asm("sei")
  101. }
  102. #endif

  104. #if  funcused EEPROM_write2
  105. ///寫雙字節(jié)EEPROM
  106. void EEPROM_write2(unsigned int uiAddress, unsigned int ucData)
  107. {

  109. //#asm("cli")
  110. ////* 等待上一次寫操作結(jié)束
  111. while(EECR & (1<<EEWE));
  112. ////* 設(shè)置地址和數(shù)據(jù)寄存器
  113. EEAR = uiAddress;

  115. EEDR = ucData & 0x00ff;
  116. ////* 置位EEMWE
  117. EECR |= (1<<EEMWE);
  118. ////* 置位EEWE 以啟動寫操作
  119. EECR |= (1<<EEWE);

  121. while(EECR & (1<<EEWE));
  122. ////* 設(shè)置地址和數(shù)據(jù)寄存器
  123. EEAR = uiAddress+1;

  125. EEDR = (ucData & 0xff00)>>8;
  126. ////* 置位EEMWE
  127. EECR |= (1<<EEMWE);
  128. ////* 置位EEWE 以啟動寫操作
  129. EECR |= (1<<EEWE);
  130. //#asm("sei")
  131. }
  132. #endif

  134. #if  funcused EEPROM_read4
  135. ///讀4字節(jié)EEPROM
  136. unsigned long EEPROM_read4(unsigned int uiAddress)
  137. { unsigned long  ucdata;
  138. // #asm("cli")
  139. ///* 等待上一次寫操作結(jié)束


  142. while(EECR & (1<<EEWE));
  143. ///* 設(shè)置地址寄存器*/
  144. EEAR = uiAddress+3;
  145. ///* 設(shè)置EERE 以啟動讀操作
  146. EECR |= (1<<EERE);
  147. ///* 自數(shù)據(jù)寄存器返回數(shù)據(jù)
  148. ucdata = EEDR;
  149. ucdata =ucdata<<8;

  151. EEAR = uiAddress+2;
  152. ///* 設(shè)置EERE 以啟動讀操作
  153. EECR |= (1<<EERE);
  154. ///* 自數(shù)據(jù)寄存器返回數(shù)據(jù)
  155. ucdata |= EEDR;
  156. ucdata =ucdata<<8;

  158. EEAR = uiAddress+1;
  159. ///* 設(shè)置EERE 以啟動讀操作
  160. EECR |= (1<<EERE);
  161. ///* 自數(shù)據(jù)寄存器返回數(shù)據(jù)
  162. ucdata |= EEDR;
  163. ucdata =ucdata<<8;

  165. while(EECR & (1<<EEWE));
  166. ///* 設(shè)置地址寄存器*/
  167. EEAR = uiAddress;
  168. ///* 設(shè)置EERE 以啟動讀操作
  169. EECR |= (1<<EERE);
  170. ///* 自數(shù)據(jù)寄存器返回數(shù)據(jù)
  171. ucdata |= EEDR;

  173. return ucdata;
  174. //#asm("sei")
  175. }
  176. #endif

  178. #if  funcused EEPROM_write4
  179. ///寫4字節(jié)EEPROM
  180. void EEPROM_write4(unsigned int uiAddress, unsigned long ucData)
  181. {

  183. //#asm("cli")
  184. ////* 等待上一次寫操作結(jié)束
  185. while(EECR & (1<<EEWE));
  186. ////* 設(shè)置地址和數(shù)據(jù)寄存器
  187. EEAR = uiAddress;

  189. EEDR = ucData & 0x000000ff;
  190. ////* 置位EEMWE
  191. EECR |= (1<<EEMWE);
  192. ////* 置位EEWE 以啟動寫操作
  193. EECR |= (1<<EEWE);

  195. ucData = ucData>>8;
  196. while(EECR & (1<<EEWE));
  197. ////* 設(shè)置地址和數(shù)據(jù)寄存器
  198. EEAR = uiAddress+1;
  199. EEDR = ucData & 0x000000ff;
  200. ////* 置位EEMWE
  201. EECR |= (1<<EEMWE);
  202. ////* 置位EEWE 以啟動寫操作
  203. EECR |= (1<<EEWE);

  205. ucData = ucData>>8;
  206. while(EECR & (1<<EEWE));
  207. ////* 設(shè)置地址和數(shù)據(jù)寄存器
  208. EEAR = uiAddress+2;
  209. EEDR = ucData & 0x000000ff;
  210. ////* 置位EEMWE
  211. EECR |= (1<<EEMWE);
  212. ////* 置位EEWE 以啟動寫操作
  213. EECR |= (1<<EEWE);

  215. ucData = ucData>>8;
  216. while(EECR & (1<<EEWE));
  217. ////* 設(shè)置地址和數(shù)據(jù)寄存器
  218. EEAR = uiAddress+3;
  219. EEDR = ucData & 0x000000ff;
  220. ////* 置位EEMWE
  221. EECR |= (1<<EEMWE);
  222. ////* 置位EEWE 以啟動寫操作
  223. EECR |= (1<<EEWE);
  224. //#asm("sei")
  225. }
  226. #endif
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