PIC16F1938单片机编程样例.docx

PIC单片机编程样例MCU:PIC16F1938;开发语言：C语言开发工具：编译环境：MPLAB IED；C 编译器：HI-TECH PICC C compiler编辑软件：source insight烧录工具：MPLAB ICD2仿真软件：Protues说明：程序已经通过编译并在仿真软件和硬件平台上成功跑起来；目的：对用到PIC16F系列单片机开发软件的群众提供样例支持，希望有帮助。Protues仿真图：1、一些定义typedef void VOID;typedef bit BIT;typedef unsigned char UINT8;typedef int INT16;typedef unsigned int UINT16;typedef long INT32;typedef unsigned long UINT32;VOID delay( VOID )int i = 100;while( i- );2、EEPROM读写/*功 能：从EEPROM中读取一个字节的数据原 型：UINT8 EEPROM_read( UINT8 addr )参数说明：输入参数：addr 输入地址 输出参数：无返 回：读取的字节注 意: */UINT8 EEPROM_read( UINT8 addr )UINT8 EE_data;EEADRL = addr;EEPGD = 0;CFGS = 0;GIE = 0; /禁止所有中断RD = 1;asm(nop);EE_data = EEDATL;RD = 0;GIE = 1; /恢复所有中断return EE_data;/*功 能：向EEPROM中写入一个字节的数据原 型：VOID EEPROM_write( UINT8 addr, UINT8 ee_data )参数说明：输入参数：addr 输入地址，ee_data 需要写入的数据输出参数：无返 回：无注 意: */VOID EEPROM_write( UINT8 addr, UINT8 ee_data )EEADRL = addr;EEDATL = ee_data;EEPGD = 0; CFGS = 0; GIE = 0; /禁止所有中断WREN = 1; /运行执行编程/擦除操作EECON2 = 0x55; /必须按这样的时序EECON2 = 0xAA;WR = 1; while( WR=1 ); /等待写操作完成 GIE = 1;WREN = 0; /禁止执行编程/擦除操作3、ADC模块/* ADC模块的初始化 */static VOID ADC_init( VOID )ADCON0 = 0b00110001; /选择AN12通道、ADC使能位ADCON1 = 0b11100000; /AD转换结果右对齐，64分频作为转换时钟，选择VSS，VDD作为参考电压ADIF = 0; /清楚AD转换标志static UINT16 throttle = 0;static VOID AD_Function( VOID )UINT8 i;UINT16 AD_result;UINT16 AD_max = 0;UINT16 AD_min = 2000;throttle = 0;for( i=0; iAD_NUM; i+ )ADIF = 0;ADRESH = 0;ADRESL = 0;delay();ADCON0 |= 0x02;while( 0 = ADIF ); /等待转换完成ADIF = 0;AD_result = ADRESH;AD_result = AD_result AD_result ? AD_max : AD_result;AD_min = AD_min = 10 )timecount = 0; time10msflg = 1;time1msflg = 1;/根据实际情况添加自己的代码5、IO初始化/* IO 初始化 */static VOID IO_init(VOID)/* PORT A */ANSELA = 0x00; /所有IO为数字IOTRISA = 0x00; /所有IO为outputPORTA = 0x00; /初始化所有IO输出电平为低电平/* PORT B */ANSELB = 0x03; /RB0和RB1都绑定为同一模拟AD输入TRISB = 0X03; /RB0和RB1为输入，其他端口为输出PORTB = 0x00;/* POTR C */PORTC =0xff; LATC = 0xff;TRISC =0xC4; /TX和RX引脚都要设置为1，禁止CCP1引脚输出驱动器6、PWM模块/* PWM模块的初始化 */static VOID PWMCCP_init(VOID)CCP1CON = 0b00001100; /单输出,PWM模式CCPTMRS0 &= 0b11111100; /CCP1选择Timer2作为定时器PR2 = 249; /PWM周期计算:(PR2 + 1)*0.0625*4(16Mhz晶振四分频，即指令周期)*预分频值，当PR2为249时，PWM频率为16KT2CON = 0x00; /预分频为1:1；TMR2ON = 1; /使能定时器Timer2TRISC2 = 0; /打开CCP1引脚输出驱动器CCPR1L = 0x00; /PWM占空比为0CCP1CON &= 0b11001111;/*功 能：PWM占空比设置原 型：VOID PWM_WidthSet( UINT8 width )参数说明：输入参数：width 占空比的百分比分子，设置值从0至100，例如width = 50时，设置的占空比为50% 输出参数：无返 回：无注 意: */static VOID PWM_WidthSet( UINT8 width )UINT16 PWM_width;UINT16 tmp;PWM_width = width * 10;if( 100 = width )/经过Protues仿真，100时至少比1000大于4才可以达到完全的100PWM_width += 4;/* 高八位赋值 */CCPR1L = PWM_width 2 ;/* 低两位赋值 */tmp = PWM_width & 0x0003;tmp = tmp 4;CCP1CON &= 0b11001111;CCP1CON |= tmp;7、串口通讯模块void uart_init(void) UINT8 ii;for(ii=0;ii_SUB_NUM_;ii+)get_uart_subii=0xff; RCSTA = 0xb0; TXSTA = 0x20; /add by lihf for test/TXSTA = 0x20; BAUDCONbits.BRG16=0; SPBRGH = 0; /8 位定时器 Baud Rate GeneratorSPBRG = _FOSC_/64/_BAUD_-1; /23;TXIE = 0; /发送不需要中断处理RCIE = 1;PEIE = 1; /没有开全局中断 /发送数据static VOID UART_sent( UINT8 byte )/while( 0 = TXIF )/continue;TXREG = byte;while( 0 = TRMT )asm(nop);/接收在中断里面调用uart_handler()函数#define _SUB_NUM_ 50UINT8 get_uart_sub_SUB_NUM_;void uart_handler(void) UINT8 i;if( 1 = RCIF )RCIF = 0;for(i=0;i_SUB_NUM_-1;i+) get_uart_subi=get_uart_subi+1;get_uart_sub_SUB_NUM_-1 = RCREG;Protues中如何仿真串口通讯，网上很多资