📄 i2cslave.lis
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.module i2cslave.c
.area data(ram, con, rel)
0000 _localBuffer::
0000 .blkb 3
.area idata
0000 212100 .byte 33,33,0
.area data(ram, con, rel)
0003 .dbfile G:\McuControl\i2cslave.c
0003 .dbsym e localBuffer _localBuffer A[3:3]c
0003 _localBufferLength::
0003 .blkb 1
.area idata
0003 20 .byte 32
.area data(ram, con, rel)
0004 .dbfile G:\McuControl\i2cslave.c
0004 .dbsym e localBufferLength _localBufferLength c
.area text(rom, con, rel)
0000 .dbfile G:\McuControl\i2cslave.c
0000 .dbfunc e i2cSetBitrate _i2cSetBitrate fV
.even
0000 _i2cSetBitrate::
0000 .dbline -1
0000 .dbline 56
0000 ; //i2c.c
0000 ; #include <iom16v.h>
0000 ; #include <eeprom.h>
0000 ; #include "i2c.h"
0000 ;
0000 ;
0000 ; // I2C标准波特率:
0000 ; // 低速 100KHz
0000 ; // 高速 400KHz
0000 ;
0000 ; unsigned char localBuffer[] = "!!";
0000 ; unsigned char localBufferLength = 0x20;
0000 ; unsigned char i2csendmax;
0000 ;
0000 ;
0000 ; unsigned char I2cSendData[I2C_SEND_DATA_BUFFER_SIZE];
0000 ; unsigned char I2cSendDataIndex;
0000 ; unsigned char I2cSendDataLength;
0000 ;
0000 ; unsigned char I2cReceiveData[I2C_RECEIVE_DATA_BUFFER_SIZE];
0000 ; unsigned char I2cReceiveDataIndex;
0000 ; unsigned char I2cReceiveDataLength;
0000 ;
0000 ; unsigned char i2creceive_b; //接收到命令
0000 ; unsigned char i2creadtime_b; //
0000 ;
0000 ;
0000 ; // 指向接收处理函数的指针，当本机被选中从接收时调用函数：I2cSlaveReceive
0000 ; void (*i2cSlaveReceive)(unsigned char receiveDataLength, unsigned char* recieveData);
0000 ; // 指向发送处理函数的指针，当本机被选中从发送时调用函数：I2cSlaveTransmit
0000 ; unsigned char (*i2cSlaveTransmit)(unsigned char transmitDataLengthMax, unsigned char* transmitData);
0000 ;
0000 ; //设置总线速率
0000 ; /******************************************
0000 ; void i2cSetBitrate(unsigned int bitrateKHz)
0000 ; {
0000 ; unsigned char bitrate_div;
0000 ; // SCL freq = F_CPU/(16+2*TWBR))
0000 ; #ifdef TWPS0
0000 ; // 对于用速率分频的AVR (mega128)
0000 ; // SCL freq = F_CPU/(16+2*TWBR*4^TWPS)
0000 ; // set TWPS to zero
0000 ; TWSR&=~(1<<TWPS0);
0000 ; TWSR&=~(1<<TWPS1);
0000 ; #endif
0000 ; // 计算分频 CPU=7.3728M
0000 ; bitrate_div = ((F_CPU/1000l)/bitrateKHz);
0000 ; if(bitrate_div >= 16)
0000 ; bitrate_div = (bitrate_div-16)/2;
0000 ; //UDR=bitrate_div;
0000 ; TWBR = bitrate_div;
0000 ; UDR=TWBR;
0000 ; } **********/
0000 ;
0000 ; void i2cSetBitrate(void)
0000 ; {
0000 .dbline 57
0000 ; TWSR&=~(1<<TWPS0);
0000 0898 cbi 0x1,0
0002 .dbline 58
0002 ; TWSR&=~(1<<TWPS1);
0002 0998 cbi 0x1,1
0004 .dbline -2
0004 L2:
0004 .dbline 0 ; func end
0004 0895 ret
0006 .dbend
0006 .dbfunc e i2cInit _i2cInit fV
.even
0006 _i2cInit::
0006 .dbline -1
0006 .dbline 63
0006 ; }
0006 ;
0006 ; //总线初始化
0006 ; void i2cInit(void)
0006 ; {
0006 .dbline 70
0006 ; //设置总线上拉
0006 ; // #ifdef _MEGA128_INCLUDED_
0006 ; //#ifdef _MEGA64_INCLUDED_
0006 ; // PORTD.0=1; // i2c SCL on ATmega128,64
0006 ; // PORTD.1=1; // i2c SDA on ATmega128,64
0006 ; // #else
0006 ; PORTC|=(1<<0); // i2c SCL on ATmega163,323,16,32,等
0006 A89A sbi 0x15,0
0008 .dbline 71
0008 ; PORTC|=(1<<1); // i2c SDA on ATmega163,323,16,32,等
0008 A99A sbi 0x15,1
000A .dbline 74
000A ; // #endif
000A ; // 清空从发送和从接受
000A ; i2cSlaveReceive = 0;
000A 2224 clr R2
000C 3324 clr R3
000E 30920300 sts _i2cSlaveReceive+1,R3
0012 20920200 sts _i2cSlaveReceive,R2
0016 .dbline 75
0016 ; i2cSlaveTransmit = 0;
0016 30920100 sts _i2cSlaveTransmit+1,R3
001A 20920000 sts _i2cSlaveTransmit,R2
001E .dbline 77
001E ; // 设置 i2c 波特率为 100KHz
001E ; i2cSetBitrate();// 从机模式不需要设置
001E F0DF xcall _i2cSetBitrate
0020 .dbline 79
0020 ; // I2C总线使能
0020 ; TWCR|=1<<TWEN; //中断使能
0020 86B7 in R24,0x36
0022 8460 ori R24,4
0024 86BF out 0x36,R24
0026 .dbline 81
0026 ; // 状态设置
0026 ; I2cState = I2C_IDLE;
0026 2224 clr R2
0028 20922C00 sts _I2cState,R2
002C .dbline 83
002C ; // 开I2C中断和回应
002C ; TWCR|=1<<TWIE;
002C 86B7 in R24,0x36
002E 8160 ori R24,1
0030 86BF out 0x36,R24
0032 .dbline 84
0032 ; TWCR|=1<<TWEA;
0032 86B7 in R24,0x36
0034 8064 ori R24,64
0036 86BF out 0x36,R24
0038 .dbline 87
0038 ;
0038 ; // asm("sei");
0038 ; i2cSetLocalDeviceAddr(I2C_ADDR);//设置从地址
0038 08E4 ldi R16,72
003A 01D0 xcall _i2cSetLocalDeviceAddr
003C .dbline -2
003C L3:
003C .dbline 0 ; func end
003C 0895 ret
003E .dbend
003E .dbfunc e i2cSetLocalDeviceAddr _i2cSetLocalDeviceAddr fV
003E ; deviceAddr -> R16
.even
003E _i2cSetLocalDeviceAddr::
003E .dbline -1
003E .dbline 90
003E ; }
003E ; void i2cSetLocalDeviceAddr(unsigned char deviceAddr)
003E ; {
003E .dbline 93
003E ; // 设置本机从地址 (从方式时) 需根据实际修改 末位强制为0,非广播方式
003E ; //TWAR=(deviceAddr&0xFE)|(genCallEn?1:0);
003E ; TWAR=deviceAddr&0xFE; //地址不需要右移
003E 802F mov R24,R16
0040 8E7F andi R24,254
0042 82B9 out 0x2,R24
0044 .dbline -2
0044 L4:
0044 .dbline 0 ; func end
0044 0895 ret
0046 .dbsym r deviceAddr 16 c
0046 .dbend
0046 .dbfunc e i2cSetSlaveReceiveHandler _i2cSetSlaveReceiveHandler fV
0046 ; i2cSlaveRx_func -> R16,R17
.even
0046 _i2cSetSlaveReceiveHandler::
0046 .dbline -1
0046 .dbline 104
0046 ; }
0046 ; /*****************
0046 ; void i2cSetLocalDeviceAddr(unsigned char deviceAddr, unsigned char genCallEn)
0046 ; {
0046 ; // 设置本机从地址 (从方式时) 需根据实际修改 末位强制为0,非广播方式
0046 ; //TWAR=(deviceAddr&0xFE)|(genCallEn?1:0);
0046 ; TWAR=deviceAddr&0xFE
0046 ; } ****************/
0046 ;
0046 ; void i2cSetSlaveReceiveHandler(void (*i2cSlaveRx_func)(unsigned char receiveDataLength, unsigned char* recieveData))
0046 ; {
0046 .dbline 105
0046 ; i2cSlaveReceive = i2cSlaveRx_func;
0046 10930300 sts _i2cSlaveReceive+1,R17
004A 00930200 sts _i2cSlaveReceive,R16
004E .dbline -2
004E L5:
004E .dbline 0 ; func end
004E 0895 ret
0050 .dbsym r i2cSlaveRx_func 16 pfV
0050 .dbend
0050 .dbfunc e i2cSetSlaveTransmitHandler _i2cSetSlaveTransmitHandler fV
0050 ; i2cSlaveTx_func -> R16,R17
.even
0050 _i2cSetSlaveTransmitHandler::
0050 .dbline -1
0050 .dbline 109
0050 ; }
0050 ;
0050 ; void i2cSetSlaveTransmitHandler(unsigned char (*i2cSlaveTx_func)(unsigned char transmitDataLengthMax, unsigned char* transmitData))
0050 ; {
0050 .dbline 110
0050 ; i2cSlaveTransmit = i2cSlaveTx_func;
0050 10930100 sts _i2cSlaveTransmit+1,R17
0054 00930000 sts _i2cSlaveTransmit,R16
0058 .dbline -2
0058 L6:
0058 .dbline 0 ; func end
0058 0895 ret
005A .dbsym r i2cSlaveTx_func 16 pfc
005A .dbend
005A .dbfunc e i2cSendStart _i2cSendStart fV
.even
005A _i2cSendStart::
005A .dbline -1
005A .dbline 114
005A ; }
005A ;
005A ; void i2cSendStart(void)
005A ; {
005A .dbline 116
005A ;
005A ; TWCR=TWCR&TWCR_CMD_MASK|(1<<TWINT)|(1<<TWSTA);
005A 86B7 in R24,0x36
005C 8F70 andi R24,15
005E 806A ori R24,160
0060 86BF out 0x36,R24
0062 .dbline -2
0062 L7:
0062 .dbline 0 ; func end
0062 0895 ret
0064 .dbend
0064 .dbfunc e i2cSendStop _i2cSendStop fV
.even
0064 _i2cSendStop::
0064 .dbline -1
0064 .dbline 120
0064 ; }
0064 ;
0064 ; void i2cSendStop(void)
0064 ; {
0064 .dbline 122
0064 ; // 发送停止条件，保持TWEA以便从接收
0064 ; TWCR=TWCR&TWCR_CMD_MASK|(1<<TWINT)|(1<<TWEA)|(1<<TWSTO);
0064 86B7 in R24,0x36
0066 8F70 andi R24,15
0068 806D ori R24,208
006A 86BF out 0x36,R24
006C .dbline -2
006C L8:
006C .dbline 0 ; func end
006C 0895 ret
006E .dbend
006E .dbfunc e i2cWaitForComplete _i2cWaitForComplete fV
.even
006E _i2cWaitForComplete::
006E .dbline -1
006E .dbline 126
006E ; }
006E ;
006E ; void i2cWaitForComplete(void)
006E ; {
006E L10:
006E .dbline 128
006E L11:
006E .dbline 128
006E ; // 等待i2c 总线操作完成
006E ; while( !(TWCR&(1<<TWINT)) );
006E 26B6 in R2,0x36
0070 27FE sbrs R2,7
0072 FDCF rjmp L10
0074 .dbline -2
0074 L9:
0074 .dbline 0 ; func end
0074 0895 ret
0076 .dbend
0076 .dbfunc e i2cSendByte _i2cSendByte fV
0076 ; data -> R16
.even
0076 _i2cSendByte::
0076 .dbline -1
0076 .dbline 132
0076 ; }
0076 ;
0076 ; void i2cSendByte(unsigned char data)
0076 ; {
0076 .dbline 134
0076 ; // 装载数据到 TWDR
0076 ; TWDR=data;
0076 03B9 out 0x3,R16
0078 .dbline 136
0078 ; // 发送开始
0078 ; TWCR=TWCR&TWCR_CMD_MASK|(1<<TWINT);
0078 86B7 in R24,0x36
007A 8F70 andi R24,15
007C 8068 ori R24,128
007E 86BF out 0x36,R24
0080 .dbline -2
0080 L13:
0080 .dbline 0 ; func end
0080 0895 ret
0082 .dbsym r data 16 c
0082 .dbend
0082 .dbfunc e i2cReceiveByte _i2cReceiveByte fV
0082 ; ackFlag -> R16
.even
0082 _i2cReceiveByte::
0082 .dbline -1
0082 .dbline 140
0082 ; }
0082 ;
0082 ; void i2cReceiveByte(unsigned char ackFlag)
0082 ; {
0082 .dbline 142
0082 ; //开始通过 i2c 接收
0082 ; if( ackFlag )
0082 0023 tst R16
0084 29F0 breq L15
0086 .dbline 143
0086 ; {
0086 .dbline 145
0086 ; // ackFlag = TRUE: 数据接收后回应ACK
0086 ; TWCR=TWCR&TWCR_CMD_MASK|(1<<TWINT)|(1<<TWEA);
0086 86B7 in R24,0x36
0088 8F70 andi R24,15
008A 806C ori R24,192
008C 86BF out 0x36,R24
008E .dbline 146
008E ; }
008E 04C0 xjmp L16
0090 L15:
0090 .dbline 148
0090 .dbline 150
0090 86B7 in R24,0x36
0092 8F70 andi R24,15
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