标题: ATMEGA16单片机usart通信(主从多机通信)proteus仿真与源码 [打印本页]
作者: 8696    时间: 2018-1-14 15:18
标题: ATMEGA16单片机usart通信(主从多机通信)proteus仿真与源码
ATMEGA16 usart通信仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）


一共3个单片机，一个主机 2个从机实现多机通信效果



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usart通信.zip (188.5 KB, 下载次数: 81)


部分单片机源程序如下:
  1. /*****************************************************
  2. This program was produced by the
  3. CodeWizardAVR V2.05.1b Evaluation
  4. Automatic Program Generator
  5. ?Copyright 1998-2011 Pavel Haiduc, HP InfoTech s.r.l.

  7. Project :
  8. Version :
  9. Date    : 2017/12/21
  10. Author  : Freeware, for evaluation and non-commercial use only
  11. Company :
  12. Comments:


  15. Chip type               : ATmega16
  16. Program type            : Application
  17. AVR Core Clock frequency: 4.000000 MHz
  18. Memory model            : Small
  19. External RAM size       : 0
  20. Data Stack size         : 256
  21. *****************************************************/

  23. #include <mega16.h>

  25. flash unsigned char led_7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
  26. unsigned char point=0;


  29. // External Interrupt 0 service routine
  30. interrupt [USART_RXC] void usart_rx_isr(void)          //接收中断服务
  31. {
  32.   unsigned char status,resh,resl;
  33.   status=UCSRA;
  34.   resh=UCSRB;
  35.   resl=UDR;
  36.   if((status&(1<<4|(1<<3)|1<<2)) ==0)
  37.   {
  38.     resh=(resh>>1)&0x01;
  39.    
  40.     if (resh==0)
  41.     PORTA=led_7[resl];
  42.     else
  43.     PORTA=0x00;
  44.         
  45.   }
  46. #asm("sei")
  47. }
  48. interrupt [EXT_INT0] void ext_int0_isr(void)
  49. {
  50. // Place your code here
  51. while(!(UCSRA&(1<<5)));
  52. UDR=point;
  53. #asm("sei")



  57. }

  59. // Standard Input/Output functions
  60. #include <stdio.h>

  62. // Declare your global variables here

  64. void main(void)
  65. {
  66. // Declare your local variables here

  68. // Input/Output Ports initialization
  69. // Port A initialization
  70. // Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
  71. // State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
  72. PORTA=0x00;
  73. DDRA=0xFF;

  75. // Port B initialization
  76. // Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
  77. // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
  78. PORTB=0x00;
  79. DDRB=0x00;

  81. // Port C initialization
  82. // Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
  83. // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
  84. PORTC=0x00;
  85. DDRC=0x00;

  87. // Port D initialization
  88. // Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
  89. // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
  90. PORTD=0x03;
  91. DDRD=0x02;

  93. // Timer/Counter 0 initialization
  94. // Clock source: System Clock
  95. // Clock value: Timer 0 Stopped
  96. // Mode: Normal top=0xFF
  97. // OC0 output: Disconnected
  98. TCCR0=0x00;
  99. TCNT0=0x00;
  100. OCR0=0x00;

  102. // Timer/Counter 1 initialization
  103. // Clock source: System Clock
  104. // Clock value: Timer1 Stopped
  105. // Mode: Normal top=0xFFFF
  106. // OC1A output: Discon.
  107. // OC1B output: Discon.
  108. // Noise Canceler: Off
  109. // Input Capture on Falling Edge
  110. // Timer1 Overflow Interrupt: Off
  111. // Input Capture Interrupt: Off
  112. // Compare A Match Interrupt: Off
  113. // Compare B Match Interrupt: Off
  114. TCCR1A=0x00;
  115. TCCR1B=0x00;
  116. TCNT1H=0x00;
  117. TCNT1L=0x00;
  118. ICR1H=0x00;
  119. ICR1L=0x00;
  120. OCR1AH=0x00;
  121. OCR1AL=0x00;
  122. OCR1BH=0x00;
  123. OCR1BL=0x00;

  125. // Timer/Counter 2 initialization
  126. // Clock source: System Clock
  127. // Clock value: Timer2 Stopped
  128. // Mode: Normal top=0xFF
  129. // OC2 output: Disconnected
  130. ASSR=0x00;
  131. TCCR2=0x00;
  132. TCNT2=0x00;
  133. OCR2=0x00;

  135. // External Interrupt(s) initialization
  136. // INT0: On
  137. // INT0 Mode: Falling Edge
  138. // INT1: Off
  139. // INT2: Off
  140. GICR|=0x40;
  141. MCUCR=0x02;
  142. MCUCSR=0x00;
  143. GIFR=0x40;

  145. // Timer(s)/Counter(s) Interrupt(s) initialization
  146. TIMSK=0x00;

  148. // USART initialization
  149. // Communication Parameters: 8 Data, 1 Stop, No Parity
  150. // USART Receiver: On
  151. // USART Transmitter: On
  152. // USART Mode: Asynchronous
  153. // USART Baud Rate: 9600
  154. UCSRA=0x00;
  155. UCSRB=0x9d;
  156. UCSRC=0x86;
  157. UBRRH=0x00;
  158. UBRRL=0x19;

  160. // Analog Comparator initialization
  161. // Analog Comparator: Off
  162. // Analog Comparator Input Capture by Timer/Counter 1: Off
  163. ACSR=0x80;
  164. SFIOR=0x00;

  166. ……………………

  168. …………限于本文篇幅 余下代码请从51黑下载附件…………
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