STM8S各个模块初始化.doc

STM8S各个模块初始化{转}原作者真不错 2012-12-09 22:20:38| 分类： 默认分类 | 标签：stm8s |举报|字号 订阅 /***************可选择的内部或者外部时钟*******************/#ifdef HSE_EXTvoid ClkInit(void){ CLK_ICKR = 0X00; //禁止高速内部时钟，从停机(Halt) 或活跃停机(Active Halt) 模式快速唤醒禁止 CLK_ECKR |= 0X01; //使能外部时钟 while(!(CLK_ECKR 0x02)); //看外部晶振是否启动 CLK_ECKR |= 0X01; //使能外部时钟 CLK_CKDIVR = 0Xf9; //外部12M HZ晶振作为CPU时钟  //入选24Mhz就在CLK_SWCR |= 0X02;出现问题 CLK_SWR = 0XB4; //主时钟选择为外部晶振 while(!(CLK_SWCR 0x8)); CLK_SWCR |= 0X02; //时钟切换 CLK_PCKENR1 = 0Xaf; //使能fMASTER时钟与对应外设的连接(仅I2C和TIM2,and TIM1)还有UART1,uart3 spi CLK_PCKENR2 = 0X00; //0X0C; CLK_CSSR = 0X00; //时钟安全系统寄存器关 while((CLK_CCOR 0x04)); //空闲才可以写CCOSEL CLK_CCOR |= 0X0d; //使能CCO始终输出,6M while(!(CLK_CCOR 0x04)); //看CCO输出的时钟是否正在工作 while((CLK_CCOR 0x02)); //等待可输出时钟可用 //CLK_HSITRIMR = 0X00-1; //HSI时钟修正寄存器,HSITRIM[3:0]：HSI修正值}#elsevoid ClkInit(void){ CLK_ICKR=0X01; //时能高速内部时钟，从停机(Halt) 或活跃停机(Active Halt) 模式快速唤醒使能 CLK_ECKR=0X00; //禁止外部时钟 CLK_SWR =0XE1; //选择16M内部时钟为主时钟 CLK_SWCR=0X00; //禁止时钟切换 CLK_CKDIVR=0X08; //8MHZ [4:3]01：fHSI = fHSI RC输出/2 , [2:0]000：fCPU = fMASTER  CLK_PCKENR1 = 0Xaf; //使能fMASTER时钟与对应外设的连接(仅I2C和TIM2,and TIM1)还有UART1,uart3 spi CLK_PCKENR2 = 0X00; //0X0C; CLK_CSSR=0X00; //时钟安全系统寄存器关 CLK_HSITRIMR=0X00-1; //HSI时钟修正寄存器,HSITRIM[3:0]：HSI修正值}#endif /********外部中断****************/void InterruptInit(void){ PD_DDR =~(0X40); //PD6设置为按键输? PD_CR1 |=0X40; PD_CR2 =~(0X40); //禁止外部中断// PD_CR2 |=0X40; //使能外部中断 EXTI_CR1 |=0X80; //PD6下降沿出触发中断// EXTI_CR1 |=0X40; //PD6上升沿出触发中断} /*****************串口收发******************/void Uart3Init(void){ UART3_CR1 = 0x00; UART3_CR2 = 0x00; UART3_CR3 = 0x00; //1个停止位  UART3_BRR2 = 0x04; //24M的Fmaster下9600的波特率 UART3_BRR1 = 0x9c; /9600 = 0x09c4 UART3_CR2 = 0x2c; //发送接收