📄 main.lst
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C51 COMPILER V7.06 MAIN 12/04/2006 10:14:46 PAGE 1
C51 COMPILER V7.06, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN Main.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE Main.c BROWSE DEBUG OBJECTEXTEND
stmt level source
1 //程序说明：
2 //该程序利用单片机完成数据在串口与SMBus总线（即I2C）之间的转发，即将串口接收
3 //到的数据通过I2C转发出去，将I2C接收到的数据通过串口转发出去
4 //
5 #include "c8051f310.h"
6 #define SYSCLK 24500000 // System clock frequency
7 #define SMB_FREQUENCY 50000 // Target SMBus frequency
8
9
10 #define WRITE 0x00 // SMBus WRITE command
11 #define READ 0x01 // SMBus READ command
12
13 // Device addresses (7 bits, lsb is a don't care)
14 #define F310_SLAVE 0xA0 // Device address for slave target
15
16 // Status vector - top 4 bits only
17 #define SMB_MTSTA 0xE0 // (MT) start transmitted
18 #define SMB_MTDB 0xC0 // (MT) data byte transmitted
19 #define SMB_MRDB 0x80 // (MR) data byte received
20 // End status vector definition
21
22 //-----------------------------------------------------------------------------------
23 // Global VARIABLES
24 //-----------------------------------------------------------------------------------
25 unsigned char SMB_DATA_IN; // Global holder for SMBus data
26 // All receive data is written here
27
28 unsigned char SMB_DATA_OUT; // Global holder for SMBus data.
29 // All transmit data is read from here
30
31 unsigned char TARGET; // Target SMBus slave address
32
33 bit SMB_BUSY; // Software flag to indicate when the
34 // SMB_Read() or SMB_Write() functions
35 // have claimed the SMBus
36
37 bit SMB_RW; // Software flag to indicate the
38 // direction of the current transfer
39
40 /*SMBus地址*/
41 #define ADDR_SLAVE 0x10
42 #define ADDR_SLAVE_W 0x20
43 #define ADDR_SLAVE_R 0x21
44 #define ADDR_SELF 0x01
45 #define ADDR_SELF_W 0x02
46 #define ADDR_SELF_R 0x03
47
48
49 #define MAXBUFSIZE 50 //缓冲区大小
50 /*全局变量*/
51 unsigned char SMBus_Txchar; //存储SMBus口待发送的字节
52 unsigned char SMBus_TxCount = 0; //SMBus发送字节的计数
53
54 unsigned char xdata UARTRxBuf[MAXBUFSIZE]; //定义一个UART串口接收缓冲区
55 unsigned char UARTRxBuf_Front = -1; //UART串口缓冲区的头位置
C51 COMPILER V7.06 MAIN 12/04/2006 10:14:46 PAGE 2
56 unsigned char UARTRxBuf_Rear = -1; //UART串口缓冲区的尾位置
57 bit UART_Tx_Complete = 0; //指示UART发送一个字节完毕
58
59 unsigned char xdata SMBusRxBuf[MAXBUFSIZE]; //定义一个SMBus接收缓冲区
60 unsigned char SMBusRxBuf_Front = -1; //SMBus接收缓冲区头位置
61 unsigned char SMBusRxBuf_Rear = -1; //SMBus接收缓冲区尾位置
62 bit SMBus_Tx_Complete = 0; //指示SMBus发送一个字节完毕
63
64 /*函数原型声明*/
65 void SMBus_Tx(unsigned char ch);
66 void UART_Tx(unsigned char ch);
67 unsigned char ReadBuffer(unsigned char* Buffer,unsigned char* pFront,unsigned char* pRear);
68
69 unsigned char UartFrame_Complete=0;
70 unsigned int pRomAddr=0;
71 unsigned char xdata UartFrame[300];//,UartTxFrame[32];
72 int i=0;
73 int UartFrame_Num=0;
74 unsigned char temp_last='P';
75 int num=0;
76 sbit LED = P3^3;
77 unsigned char temp,t=0,IIC_Busy=0,RWByte=0,RxFlag=0,RxData=0x00,StopRequire=0;
78 int I2CRxNum=0;
79 // Peripheral specific initialization functions,
80 // Called from the Init_Device() function
81 void PCA_Init()
82 {
83 1 PCA0MD &= ~0x40;
84 1 PCA0MD = 0x00;
85 1 }
86
87 void Port_IO_Init()
88 {
89 1
90 1 XBR0 = 0x05;
91 1 XBR1 = 0x40;
92 1
93 1
94 1
95 1 /* P0MDIN = 0xFF; // All P0 pins digital input
96 1
97 1 P0MDOUT = 0x00; // All P0 pins open-drain output
98 1 P0 = 0xFF; */ //
99 1
100 1 }
101 /*
102 void Timer_Init()
103 {
104
105 TMOD = 0x22;//Mode2:8 bit Auto Reload
106 CKCON = 0x0C;//Timer0,1 use SYSCLK
107 TH0 = 0xF6;
108 TH1 = 0x2B;//Timer1 as UART Baud Triger, 0X2B~57600
109 TL1 = 0x2B;
110 TCON = 0x50;//Timer1,0 permission
111 }
112 */
113 void Timer0_Init (void)
114 {
115 1 CKCON &= 0xF8; // Timer0 clock source = SYSCLK / 12
116 1 TMOD |= 0x02; // Timer0 in 8-bit auto-reload mode
117 1
C51 COMPILER V7.06 MAIN 12/04/2006 10:14:46 PAGE 3
118 1 TH0 = -(SYSCLK/SMB_FREQUENCY/12/3) ; // Timer0 configured to overflow at 1/3
119 1 // the rate defined by SMB_FREQUENCY
120 1
121 1 TL0 = -(SYSCLK/SMB_FREQUENCY/12/3); // Timer0 preloaded to overflow at the
122 1 // rate defined by SMB_FREQUENCY
123 1
124 1 TR0 = 1; // Timer0 enabled
125 1 /*
126 1 TCON = 0x50;
127 1 TMOD = 0x22;
128 1 CKCON = 0x0C;
129 1 TH0 = 0xF6;
130 1 TH1 = 0x61;
131 1 TL1 = 0x61;*/
132 1 }
133
134 void UART_Init()//use timer1
135 {
136 1 TMOD |= 0x20;//Mode2:8 bit Auto Reload
137 1 CKCON |= 0x08;//Timer1 use SYSCLK
138 1 //TH0 = 0xF6;
139 1 TH1 = 0x2B;//Timer1 as UART Baud Triger, 0X2B~57600
140 1 TL1 = 0x2B;
141 1 TCON |= 0x40;//Timer1 permission
142 1
143 1
144 1 SCON0 = 0x10;
145 1
146 1
147 1 }
148
149 void SMBus_Init()//use timer0
150 {
151 1 // SMB0CF = 0x80;
152 1 // SMB0CF = 0x5C; // Use Timer0 overflows as SMBus clock
153 1 // source
154 1 // Disable slave mode
155 1 // Enable setup & hold time extensions
156 1 // Enable SMBus Free timeout detect
157 1 // Enable SCL low timeout detect
158 1 SMB0CF |= 0x80; // Enable SMBus;
159 1 }
160
161 void Interrupts_Init()
162 {
163 1 EIE1 = 0x01;//SMBUS
164 1 IE = 0x10;//UART
165 1 }
166
167 // Initialization function for device,
168 // Call Init_Device() from your main program
169 void Init_Device(void)
170 {
171 1
172 1 PCA_Init();
173 1 OSCICN |=0x03;//SYSCLK取内部振荡器，不分频
174 1 Port_IO_Init();
175 1 Timer0_Init();
176 1 UART_Init();
177 1 SMBus_Init();
178 1 Interrupts_Init();
179 1 }
C51 COMPILER V7.06 MAIN 12/04/2006 10:14:46 PAGE 4
180
181
182
183 /*main()主函数*/
184 void main()
185 {
186 1 Init_Device(); //单片机初始化
187 1 IE = 0x90; //UART中断使能
188 1
189 1 //LED=0;
190 1 //LED=1;
191 1 EA=1;
192 1
193 1 // SBUF0=0X33;
194 1 // while(UART_Tx_Complete == 0);
195 1 // UART_Tx_Complete = 0;
196 1 //TI0 = 0;
197 1 // pRomAddr=UartFrame[2];//获取当前Rom地址
198 1 // while(SMB0CF & 0x20 != 0);//查询SMBus总线是否BUSY
199 1 // STA = 1; //发起一个I2C START
200 1
201 1 while(1)
202 1 {
203 2 if(UartFrame_Complete==1)
204 2 {
205 3
206 3 /* for(i=0;i<UartFrame_Num;i++)
207 3 {
208 3
209 3 SBUF0=UartFrame[i];
210 3 while(UART_Tx_Complete == 0);
211 3 UART_Tx_Complete = 0;
212 3 }*/
213 3 SBUF0='O';
214 3 while(UART_Tx_Complete == 0);
215 3 UART_Tx_Complete = 0;
216 3 SBUF0='K';
217 3 while(UART_Tx_Complete == 0);
218 3 UART_Tx_Complete = 0;
219 3
220 3 UartFrame_Complete=0;
221 3 // UartFrame_Num=0;
222 3 num=0;
223 3 //先写
224 3 RWByte=0xA0;//write
225 3 pRomAddr=UartFrame[2];//获取当前Rom地址
226 3 while(SMB0CF & 0x20 != 0);//查询SMBus总线是否BUSY
227 3 STA = 1; //发起一个I2C START
228 3 IIC_Busy=1;
229 3 while(IIC_Busy==1);
230 3 if(UartFrame[1]==0xA1)//写后的再读
231 3 {
232 4 RWByte=0xA1;//read
233 4 I2CRxNum=UartFrame[3]+1; //需要读的长度,0表示读1个
234 4 pRomAddr=UartFrame[2];//获取当前Rom地址
235 4 //pRomAddrEnd=pRomAddr+UartFrame[2]-1;
236 4 while(SMB0CF & 0x20 != 0);//查询SMBus总线是否BUSY
237 4 STA = 1; //发起一个I2C START
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