提一个关于C8051f系列中断借口设置的问题

naphu

提一个关于C8051f系列中断借口设置的问题 [复制链接]

在C8051f020中,为INT0和INT1分配了端口之后,程序中除了对XBR1进行设置外还需要设置写什么？谢谢

villaining

设置外部中断INT0和INT1的触发方式;
使能INT0和INT1中断；
使能系统总中断

1. 
   
2. //-----------------------------------------------------------------------------
   
3. // F02x_External_Interrupts.c
   
4. //-----------------------------------------------------------------------------
   
5. // Copyright 2007 Silicon Laboratories, Inc.
   
6. // http://www.silabs.com
   
7. //
   
8. // Program Description:
   
9. //
   
10. // This software shows the necessary configuration to use External Interrupt 0
    
11. // (/INT0) or External Interrupt 1 (/INT1) as an interrupt source.  The code
    
12. // executes the initialization routines and then spins in an infinite while()
    
13. // loop.  If the button P3.7 (on the target board) is pressed, then the
    
14. // edge-triggered /INT0 input on P0.0 will cause an interrupt and toggle the
    
15. // LED.
    
16. //
    
17. // Pinout:
    
18. //
    
19. // P0.0 - /INT0
    
20. // P0.1 - /INT1
    
21. //
    
22. // P1.6 - LED
    
23. //
    
24. // P3.7 - SWITCH
    
25. //
    
26. // How To Test:
    
27. //
    
28. // 1) Compile and download code to a 'F02x target board.
    
29. // 2) On the target board, connect the switch side of J1 to either P0.0 for
    
30. //    /INT0 or P0.1 for /INT1.
    
31. // 3) Verify the J3 jumper is in place.
    
32. // 4) Verify the J6 and J9 jumpers are removed.
    
33. // 5) Press the P3.7 switch.  Every time the switch is pressed, the P1.6 LED
    
34. //    should toggle.
    
35. //
    
36. // Target:         C8051F02x
    
37. // Tool chain:     Keil C51 7.50 / Keil EVAL C51
    
38. // Command Line:   None
    
39. //
    
40. //
    
41. // Release 1.0
    
42. //    -Initial Revision (SM)
    
43. //    -19 JUN 2007
    
44. //
    
45. 
    
46. //-----------------------------------------------------------------------------
    
47. // Include Files
    
48. //-----------------------------------------------------------------------------
    
49. 
    
50. #include
    
51. 
    
52. //-----------------------------------------------------------------------------
    
53. // Global Constants
    
54. //-----------------------------------------------------------------------------
    
55. 
    
56. #define SYSCLK       (22118400L)
    
57. 
    
58. sbit LED    = P1^6;                    // Green Led
    
59. sbit SWITCH = P3^7;                    // Push-button switch on board
    
60. 
    
61. //-----------------------------------------------------------------------------
    
62. // Function Prototypes
    
63. //-----------------------------------------------------------------------------
    
64. 
    
65. void Oscillator_Init (void);           // Configure the system clock
    
66. void Port_Init (void);                 // Configure the Crossbar and GPIO
    
67. void Ext_Interrupt_Init (void);        // Configure External Interrupts (/INT0
    
68.                                        // and /INT1)
    
69. 
    
70. //-----------------------------------------------------------------------------
    
71. // MAIN Routine
    
72. //-----------------------------------------------------------------------------
    
73. void main (void)
    
74. {
    
75.    WDTCN = 0xDE;                       // Disable Watchdog timer
    
76.    WDTCN = 0xAD;
    
77. 
    
78.    Oscillator_Init();                  // Initialize the system clock
    
79.    Port_Init ();                       // Initialize crossbar and GPIO
    
80.    Ext_Interrupt_Init();               // Initialize External Interrupts
    
81. 
    
82.    EA = 1;
    
83. 
    
84.    while(1);                           // Infinite while loop waiting for
    
85.                                        // an interrupt from /INT0 or /INT1
    
86. }
    
87. 
    
88. //-----------------------------------------------------------------------------
    
89. // Initialization Subroutines
    
90. //-----------------------------------------------------------------------------
    
91. 
    
92. //-----------------------------------------------------------------------------
    
93. // OSCILLATOR_Init
    
94. //-----------------------------------------------------------------------------
    
95. //
    
96. // Return Value : None
    
97. // Parameters   : None
    
98. //
    
99. // This function initializes the system clock to use the  external 22.1184MHz
    
100. // crystal.
     
101. //
     
102. //-----------------------------------------------------------------------------
     
103. void OSCILLATOR_Init (void)
     
104. {
     
105.    int i;                              // Software timer
     
106. 
     
107.    OSCICN |= 0x80;                     // Enable the missing clock detector
     
108. 
     
109.    // Initialize external crystal oscillator to use 22.1184 MHz crystal
     
110. 
     
111.    OSCXCN = 0x67;                      // Enable external crystal osc.
     
112.    for (i=0; i < 256; i++);            // Wait at least 1ms
     
113.    while (!(OSCXCN & 0x80));           // Wait for crystal osc to settle
     
114.    OSCICN |= 0x08;                     // Select external clock source
     
115.    OSCICN &= ~0x04;                    // Disable the internal osc.
     
116. }
     
117. 
     
118. 
     
119. //-----------------------------------------------------------------------------
     
120. // Port_Init
     
121. //-----------------------------------------------------------------------------
     
122. //
     
123. // Return Value : None
     
124. // Parameters   : None
     
125. //
     
126. // This function configures the crossbar and GPIO ports.
     
127. //
     
128. // Pinout:
     
129. //
     
130. // P0.0 - digital   open-drain  /INT0
     
131. // P0.1 - digital   open-drain  /INT1
     
132. //
     
133. // P1.6 - digital   push-pull   LED
     
134. //
     
135. // P3.7 - digital   open-drain  SWITCH
     
136. //
     
137. //-----------------------------------------------------------------------------
     
138. void Port_Init (void)
     
139. {
     
140.    XBR0     = 0x00;
     
141.    XBR1     = 0x14;                    // No peripherals selected
     
142.    XBR2     = 0x40;                    // Enable crossbar and weak pullups
     
143. 
     
144.    P1MDOUT  = 0x40;                    // LED is push-pull a output
     
145. 
     
146. }
     
147. 
     
148. //-----------------------------------------------------------------------------
     
149. // Ext_Interrupt_Init
     
150. //-----------------------------------------------------------------------------
     
151. //
     
152. // Return Value : None
     
153. // Parameters   : None
     
154. //
     
155. // This function configures and enables /INT0 and /INT1 (External Interrupts)
     
156. // as negative edge-triggered.
     
157. //
     
158. //-----------------------------------------------------------------------------
     
159. void Ext_Interrupt_Init (void)
     
160. {
     
161.    TCON = 0x05;                        // /INT 0 and /INT 1 are falling edge
     
162.                                        // triggered
     
163. 
     
164.    EX0 = 1;                            // Enable /INT0 interrupts
     
165.    EX1 = 1;                            // Enable /INT1 interrupts
     
166. 
     
167. }
     
168. 
     
169. //-----------------------------------------------------------------------------
     
170. // Interrupt Service Routines
     
171. //-----------------------------------------------------------------------------
     
172. 
     
173. //-----------------------------------------------------------------------------
     
174. // /INT0 ISR
     
175. //-----------------------------------------------------------------------------
     
176. //
     
177. // Whenever a negative edge appears on P0.0, the LED is toggled.
     
178. // The interrupt pending flag is automatically cleared by vectoring to the ISR
     
179. //
     
180. //-----------------------------------------------------------------------------
     
181. void INT0_ISR (void) interrupt 0
     
182. {
     
183.    LED = !LED;
     
184. }
     
185. 
     
186. //-----------------------------------------------------------------------------
     
187. // /INT1 ISR
     
188. //-----------------------------------------------------------------------------
     
189. //
     
190. // Whenever a negative edge appears on P0.1, the LED is toggled.
     
191. // The interrupt pending flag is automatically cleared by vectoring to the ISR
     
192. //
     
193. //-----------------------------------------------------------------------------
     
194. void INT1_ISR (void) interrupt 2
     
195. {
     
196.    LED = !LED;
     
197. }
     
198. 
     
199. //-----------------------------------------------------------------------------
     
200. // End Of File
     
201. //-----------------------------------------------------------------------------
     
202. 
     

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saqi99

这是软件自带的关于外部中断的例程，lz可以参考呀

hua1232925

我也来学习一下啦

yangyali314

中断向量使能，中断优先级设置

zyandll123

管脚的输入输出方式也是要设置的，数字输入，开漏输出