C8051F020FM24C16收发测试程序.docx

1、C8051F020FM24C16收发测试程序/FM24C16收发测试程序（通过）/收发有错误是因为收发数组定义长度问题/ur0第一次收不到30而第二次收的数据又覆盖了部分第一的数据/SMB的收发也有上述问题造成收发有错误/*文件描述： 三相电测量上报功能说明： 测量ATT7022B完成 PCF8563上报定时（需校时） FM24C256转换数据存储 UART0口用于RS232读数据 UART1控制无线模块上报数据创建：2006年12月5日/* *函数：main. *入口：无 *出口：无 *功能说明：接收UART端口命令 执行读ATT7022B的数据 进行处理、存储和回发数据 */*/包含的文件

2、/*#include #include #include /*/函数：init_sysclk(void)/功能:时钟初始化/入口：无/出口： 无/说明:使用外部时钟12M/*void init_sysclk (void) uint i=0; OSCXCN=0x67; /external oscillator with 12MHz crystal for(i=0;i256;i+); / XTLVLD blanking while(!(OSCXCN & 0x80); / Wait for crystal osc. to settle OSCICN=0x88; /时钟丢失检测,选择外部时钟 CKCO

3、N = 0x00; /时钟分频/*函数：void enable_wdog(void) void disable_wdog(void)功能：使能、禁止wdog入口：无出口：无说明：*/void enable_wdog(void) WDTCN=0xA5; /允许看门狗定时器工作void disable_wdog(void) /禁止看门狗定时器工作 WDTCN=0xDE; WDTCN=0xAD;/*函数：void init_ioport()功能：端口配置及端口位定义入口：无出口：无说明：*/void init_ioport() XBR0=0x07; /TXD0-P0.0 RXD0-P0.1,SPI_

4、SCK-P0.2,SPI_MISO-P0.3 /SPI_MOSI-P0.4,SPI_NSS-P0.5,SDA-P0.6,SCL-P0.7, XBR1=0X10; /INT1使能INT1-P1.2 XBR2=0x44; /端口I/O弱上拉允许，TX1-P1.0,RXD-P1.1交叉开关允许 P0MDOUT=0x08; /端口0输出方式寄存器：0-漏极开路 P1MDIN=0XFF; /端口1输入方式寄存器：0-配置为数字输入 P1MDOUT=0x00; /端口1输出方式寄存器，0-漏极开路 P1=0xff; P2MDOUT=0x00; /端口2输出方式寄存器：0-漏极开路 P2=0xff; P3M

5、DOUT=0X00; /端口3输出方式寄存器：0-漏极开路 P3=0xff; P74OUT=0x00; /端口7-4输出方式寄存器：0-漏极开路 P4=0xff; P5=0xff; P6=0xff; P7=0xff; /-/函数：void Delay_ms (unsigned ms)/功能：实现延时功能 Timer0_ms/-/* Configure Timer0 to delay */ void Delay_ms (unsigned ms) uchar i; / millisecond counter TCON &= 0x30; / STOP Timer0 and clear overflo

6、w flag TMOD |= 0x01; / configure Timer0 to 16-bit mode CKCON |= 0x08; / Timer0 counts SYSCLKs for (i = 0; i 8; / set Timer0 to overflow in 1ms TL0 = -SYSCLK/1000; TR0 = 1; / START Timer0 while (TF0 = 0); / wait for overflow TF0 = 0; / clear overflow indicator /-/函数：void Delay_us (unsigned us)/功能：实现延

7、时功能 Timer0_us/-/* Configure Timer0 to delay */ void Delay_us (unsigned us) uchar i; / microseconds counter TCON &= 0x30; / STOP Timer0 and clear overflow flag TMOD |= 0x01; / configure Timer0 to 16-bit mode CKCON |= 0x08; / Timer0 counts SYSCLKs for (i = 0; i 8; / set Timer0 to overflow in 1us TL0 =

8、 -SYSCLK/1000000; TR0 = 1; / START Timer0 while (TF0 = 0); / wait for overflow TF0 = 0; / clear overflow indicator /*/函数：unsigned char my_add(uchar my_add)/功能：读开关状态确定子地址/入口：无/出口：子地址/说明：子地址存于myadd中(即设备号）/*void my_add(void) P74OUT |=0XD0; myadd =P5; /*/函数：void jiaob(ATT_JB)/功能：写校表寄存器/说明：UART口接收校表时间并存于

9、FM24C256中/*void jiaob (void) main() disable_wdog(); /关看门狗 init_sysclk (); /时钟初始化 init_ioport(); /交叉开关配置 my_add(); /读设备子地址设置 UART0_Init(); /UART0初始化 SPI0_Init (); init_smbus(); EX1= 1; /开INT1 EA = 1; /开中断 / SPIEN=1; uart0_flag=0;while(1)if(uart0_flag) uart0_flag=0; / ATT_Read (ur0_rxd0); / 写fm24c256字

10、节数 / 写fm24c256字节记数fm_ram_add=0; / 写fm24c256起始地址 smbus_send (fm_send_len);fm_ram_add=0;smbus_receive(fm_receive_len); m=&fm_read_buf0; txd_string(m,30); /*void init_smbus(void) SMB0CN=0x44; /IIC总线控制寄存器01000100 SMB0CR=0xA4; /-(SYSCLK/2*SCL);IIC总线速率寄存器SCL=100K /允许IIC总线中断，标志位是SI（SMB0CN.3） EIE1 |=0x02; /

11、SMBUS中断使能 EA = 1; /中断使能 sm_busy=0; /总线空闲中断接收发完成标志 开始置1 ENSMB=1; /SMBUS0使能 /-向给定寄存器地址写一个字节-/void smbus_send (uchar fm_send_len)/fm_send_len=30; / 写fm24c256字节数fm_send_count=0; / 写fm24c256字节记数 while(sm_busy); / Wait for SMBus to be free. sm_busy=1; / Occupy SMBus (set to busy) sm_r_s_flag=1; fm_send_le

12、n=30; / 写fm24c256字节数 STO=0; STA=1; / Start transfer while (sm_busy); / Wait for transfer to finish/-从给定寄存器地址读一个字节-/void smbus_receive (uchar fm_receive_len) /fm_receive_len=30; / 读fm24c256字节数fm_receive_count=0; / 读fm24c256字节记数 while (sm_busy); / Wait for bus to be free. sm_busy=1; / Occupy SMBus (se

13、t to busy) sm_r_s_flag=0; fm_receive_len=30; STO=0; STA=1; / Start transfer while(sm_busy); / Wait for transfer to finish /-SMBUS中断服务程序-/void smbus(void) interrupt 7 ES0=0; switch (SMB0STA) /SMBUS状态寄存器SMB0STA /fm_err_flag=1说明SMBus有问题 case 0x08: if(sm_r_s_flag) /判断收发 chip_select=0xA0; else chip_selec

14、t=0xA1; /主发送/接收：起始条件已发出. STA=0;fm_err_flag=0;AA=1; /清除起始位STA,应答 SMB0DAT=chip_select; /从地址+读/写标志送SMB0DAT, break; case 0x10: /主发送/接收：重复起始条件已发出。 STA=0;AA=1; /人工清除起始位STA，应答 SMB0DAT=chip_select; /从地址+读/写标志送SMB0DAT break; case 0x18: /主发送器：从地址+写标志已发出，收到ACK SMB0DAT=fm_ram_add;write_num=0; /将要发送的数据装入SMB0DAT.

15、 break; case 0x20: /主发送器：从地址+写标志已发出，收到NACK write_num+; if(write_num5) STO=1;sm_busy=0;fm_err_flag=1; /如果超过5次不成功则释放总线 elseSTO=1;STA=1; /确认查询重复，置位STO+STA。 break; case 0x28: /数据字节已发出，收到ACK，将下一字节装入SMB0DAT； switch(fm_send_len) case 0x00: STO=1;sm_busy=0; /如果数据已经发送结束则释放总线 break; default : SMB0DAT=ur0_rxdf

16、m_send_count+; fm_send_len-; break; break; case 0x30: /主发送器：数据字节已发出，收到NACK， write_num+; if(write_num5) STO=1;sm_busy=0;fm_err_flag=1; /如果超过5次不成功则释放总线 else STO=1;STA=1; /重试传输或置位STO break; case 0x38: /主发送器：竞争失败，保存当前数据 write_num+; if(write_num5) STO=1;sm_busy=0;fm_err_flag=1; /如果超过5次不成功则释放总线 STO=1;STA=

17、1; break; case 0x40: receive_num=0; /主接收器：从地址+读标志已发出，收到ACK， if(fm_receive_len5) STO=1;sm_busy=0;fm_err_flag=1; /如果超过5次不成功则释放总线 else STO=1;STA=1; break; /确认查询重复，置位STO+STA。 case 0x50: /主接收器：数据字节收到，ACK已发出;读SMB0DAT，等待 fm_read_buffm_receive_count+=SMB0DAT; fm_receive_len-; if(fm_receive_len2)AA=0; /如下一个字

18、节是最后字节，清除AA（nack)。 break; case 0x58: /主接收器：数据字节收到，NACK已发出，置位STO。 fm_read_buffm_receive_count+=SMB0DAT; /读操作已经完成，读数据寄存器并且发出STOP. fm_receive_len-; STO=1;sm_busy=0; /Free SMBus break; default: STO=1;sm_busy=0;fm_err_flag=1; /Reset communication. break; SI=0; /clear interrupt flagES0=1; /-判断本设备命令及命令内容执行

19、命令/-/ SPI0_Init/-/ Configure SPI0 for 8-bit, 200K SCK, Master mode, data / sampled on SCK 2st edge./void SPI0_Init (void) SPI0CFG = 0x87; / data sampled on SCK 2st edge / 8-bit data words,MSB 1st SPI0CN = 0x02; / Master mode; SPI enabled; flags / cleared SPI0CKR = 0x2F; / SPI clock = 200kHz (limited

20、 by / EEPROM spec.) EIE1 &= 0XFE; / spi关 /开漏/-/ ATT_Read/-/ This routine reads and returns a single ATT7022 byte whose address is/ given in ./void ATT_Read (uchar x) uchar n=0; ATT_CS = 0; / select att7022 SPIF = 0; Delay_us (1); / wait at least 250ns (CS setup time) SPI0DAT = x; while (SPIF=0); Del

21、ay_us (3); SPIF = 0;for(n=0;n=3;n+) SPI0DAT = 0;while (SPIF=0); SPIF = 0; ur0_rxdn= SPI0DAT; / read data from SPI / read data from SPI Delay_us (1); / wait at least 250ns (CS hold time) ATT_CS = 1; / de-select EEPROM Delay_us (1); / wait at least 500ns (CS disable time) /-/ ATT_Write/-/void ATT_Writ

22、e (uchar ATT_WADD, uchar att_wd) uchar n; ATT_WADD = ATT_W|ATT_W_ADD; ATT_CS = 0; / select att7022 Delay_us (1); / wait at least 250ns (CS setup time) / transmit Write opcode SPIF = 0; SPI0DAT = ATT_W|ATT_W_ADD; while (SPIF = 0); SPIF = 0; SPI0DAT = att_wdn; while (SPIF = 0); n = +n; SPIF = 0; SPI0DAT = att_wdn; while (SPIF = 0); n = +n; SPIF = 0; SPI0DAT = att_wdn; while (SPIF = 0); Delay_us (1); / wait at least 250ns (CS hold time) ATT_CS = 1; /-/串口初始化/-void UART0_Init(void) SCON0 =