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: 80)

2018-1-14 15:18 上传

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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.
   
6. 
   
7. Project :
   
8. Version :
   
9. Date    : 2017/12/21
   
10. Author  : Freeware, for evaluation and non-commercial use only
    
11. Company :
    
12. Comments:
    
13. 
    
14. 
    
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. *****************************************************/
    
22. 
    
23. #include <mega16.h>
    
24. 
    
25. flash unsigned char led_7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
    
26. unsigned char point=0;
    
27. 
    
28. 
    
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")
    
54. 
    
55. 
    
56. 
    
57. }
    
58. 
    
59. // Standard Input/Output functions
    
60. #include <stdio.h>
    
61. 
    
62. // Declare your global variables here
    
63. 
    
64. void main(void)
    
65. {
    
66. // Declare your local variables here
    
67. 
    
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;
    
74. 
    
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;
    
80. 
    
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;
    
86. 
    
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;
    
92. 
    
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;
     
101. 
     
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;
     
124. 
     
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;
     
134. 
     
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;
     
144. 
     
145. // Timer(s)/Counter(s) Interrupt(s) initialization
     
146. TIMSK=0x00;
     
147. 
     
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;
     
159. 
     
160. // Analog Comparator initialization
     
161. // Analog Comparator: Off
     
162. // Analog Comparator Input Capture by Timer/Counter 1: Off
     
163. ACSR=0x80;
     
164. SFIOR=0x00;
     
165. 
     
166. ……………………
     
167. 
     
168. …………限于本文篇幅 余下代码请从51黑下载附件…………
     

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