芯片：STC8H1K28
目的：呼吸灯
这是一段官网下载的例程，配置了多路PWM，目前不知道具体寄存器赋值，先把能使用的代码贴上，后续再添加
#define Timer0_Reload (65536UL -(MAIN_Fosc / 1000)) //Timer 0 中断频率, 1000次/秒 #define PWMA_ENO (*(unsigned char volatile xdata *) 0xFEB1) #define PWMA_PS (*(unsigned char volatile xdata *) 0xFEB2) #define PWMB_ENO (*(unsigned char volatile xdata *) 0xFEB5) #define PWMB_PS (*(unsigned char volatile xdata *) 0xFEB6) #define PWMA_CR1 (*(unsigned char volatile xdata *) 0xFEC0) #define PWMA_CR2 (*(unsigned char volatile xdata *) 0xFEC1) #define PWMA_SMCR (*(unsigned char volatile xdata *) 0xFEC2) #define PWMA_ETR (*(unsigned char volatile xdata *) 0xFEC3) #define PWMA_IER (*(unsigned char volatile xdata *) 0xFEC4) #define PWMA_SR1 (*(unsigned char volatile xdata *) 0xFEC5) #define PWMA_SR2 (*(unsigned char volatile xdata *) 0xFEC6) #define PWMA_EGR (*(unsigned char volatile xdata *) 0xFEC7) #define PWMA_CCMR1 (*(unsigned char volatile xdata *) 0xFEC8) #define PWMA_CCMR2 (*(unsigned char volatile xdata *) 0xFEC9) #define PWMA_CCMR3 (*(unsigned char volatile xdata *) 0xFECA) #define PWMA_CCMR4 (*(unsigned char volatile xdata *) 0xFECB) #define PWMA_CCER1 (*(unsigned char volatile xdata *) 0xFECC) #define PWMA_CCER2 (*(unsigned char volatile xdata *) 0xFECD) #define PWMA_CNTRH (*(unsigned char volatile xdata *) 0xFECE) #define PWMA_CNTRL (*(unsigned char volatile xdata *) 0xFECF) #define PWMA_PSCRH (*(unsigned char volatile xdata *) 0xFED0) #define PWMA_PSCRL (*(unsigned char volatile xdata *) 0xFED1) #define PWMA_ARRH (*(unsigned char volatile xdata *) 0xFED2) #define PWMA_ARRL (*(unsigned char volatile xdata *) 0xFED3) #define PWMA_RCR (*(unsigned char volatile xdata *) 0xFED4) #define PWMA_CCR1H (*(unsigned char volatile xdata *) 0xFED5) #define PWMA_CCR1L (*(unsigned char volatile xdata *) 0xFED6) #define PWMA_CCR2H (*(unsigned char volatile xdata *) 0xFED7) #define PWMA_CCR2L (*(unsigned char volatile xdata *) 0xFED8) #define PWMA_CCR3H (*(unsigned char volatile xdata *) 0xFED9) #define PWMA_CCR3L (*(unsigned char volatile xdata *) 0xFEDA) #define PWMA_CCR4H (*(unsigned char volatile xdata *) 0xFEDB) #define PWMA_CCR4L (*(unsigned char volatile xdata *) 0xFEDC) #define PWMA_BKR (*(unsigned char volatile xdata *) 0xFEDD) #define PWMA_DTR (*(unsigned char volatile xdata *) 0xFEDE) #define PWMA_OISR (*(unsigned char volatile xdata *) 0xFEDF) /*****************************************************************************/ #define PWM1_1 0x00 //P:P1.0 N:P1.1 #define PWM1_2 0x01 //P:P2.0 N:P2.1 #define PWM1_3 0x02 //P:P6.0 N:P6.1 #define PWM2_1 0x00 //P:P1.2/P5.4 N:P1.3 #define PWM2_2 0x04 //P:P2.2 N:P2.3 #define PWM2_3 0x08 //P:P6.2 N:P6.3 #define PWM3_1 0x00 //P:P1.4 N:P1.5 #define PWM3_2 0x10 //P:P2.4 N:P2.5 #define PWM3_3 0x20 //P:P6.4 N:P6.5 #define PWM4_1 0x00 //P:P1.6 N:P1.7 #define PWM4_2 0x40 //P:P2.6 N:P2.7 #define PWM4_3 0x80 //P:P6.6 N:P6.7 #define PWM4_4 0xC0 //P:P3.4 N:P3.3 #define ENO1P 0x01 #define ENO1N 0x02 #define ENO2P 0x04 #define ENO2N 0x08 #define ENO3P 0x10 #define ENO3N 0x20 #define ENO4P 0x40 #define ENO4N 0x80 /************* 本地变量声明 **************/ bit B_1ms; //1ms标志 u16 PWM1_Duty; u16 PWM2_Duty; u16 PWM3_Duty; u16 PWM4_Duty; bit PWM1_Flag; bit PWM2_Flag; bit PWM3_Flag; bit PWM4_Flag; void UpdatePwm(void); /******************** 主函数 **************************/ void main(void) { P0M1 = 0x00; P0M0 = 0x00; //设置为准双向口 P1M1 = 0x00; P1M0 = 0x00; //设置为准双向口 P2M1 = 0x00; P2M0 = 0x00; //设置为准双向口 P3M1 = 0x00; P3M0 = 0x00; //设置为准双向口 P4M1 = 0x00; P4M0 = 0x00; //设置为准双向口 P5M1 = 0x00; P5M0 = 0x00; //设置为准双向口 P6M1 = 0x00; P6M0 = 0x00; //设置为准双向口 P7M1 = 0x00; P7M0 = 0x00; //设置为准双向口 PWM1_Flag = 0; PWM2_Flag = 0; PWM3_Flag = 0; PWM4_Flag = 0; PWM1_Duty = 0; PWM2_Duty = 256; PWM3_Duty = 512; PWM4_Duty = 1024; // Timer0初始化 AUXR = 0x80; //Timer0 set as 1T, 16 bits timer auto-reload, TH0 = (u8)(Timer0_Reload / 256); TL0 = (u8)(Timer0_Reload % 256); ET0 = 1; //Timer0 interrupt enable TR0 = 1; //Tiner0 run P_SW2 |= 0x80; PWMA_CCER1 = 0x00; //写 CCMRx 前必须先清零 CCxE 关闭通道 PWMA_CCER2 = 0x00; PWMA_CCMR1 = 0x60; //通道模式配置 PWMA_CCMR2 = 0x60; PWMA_CCMR3 = 0x60; PWMA_CCMR4 = 0x60; PWMA_CCER1 = 0x55; //配置通道输出使能和极性 PWMA_CCER2 = 0x55; PWMA_ARRH = 0x03; //设置周期时间 PWMA_ARRL = 0xff; PWMA_ENO = 0x00; PWMA_ENO |= ENO1P; //使能输出 PWMA_ENO |= ENO1N; //使能输出 PWMA_ENO |= ENO2P; //使能输出 PWMA_ENO |= ENO2N; //使能输出 PWMA_ENO |= ENO3P; //使能输出 PWMA_ENO |= ENO3N; //使能输出 PWMA_ENO |= ENO4P; //使能输出 PWMA_ENO |= ENO4N; //使能输出 PWMA_PS = 0x00; //高级 PWM 通道输出脚选择位 PWMA_PS |= PWM1_3; //选择 PWM1_3 通道 PWMA_PS |= PWM2_3; //选择 PWM2_3 通道 PWMA_PS |= PWM3_3; //选择 PWM3_3 通道 PWMA_PS |= PWM4_2; //选择 PWM4_3 通道 PWMA_BKR = 0x80; //使能主输出 PWMA_CR1 |= 0x01; //开始计时 P_SW2 &= 0x7f; P40 = 0; //给LED供电 EA = 1; //打开总中断 while (1) { } } /********************** Timer0 1ms中断函数 ************************/ void timer0(void) interrupt 1 { if(!PWM1_Flag) { PWM1_Duty++; if(PWM1_Duty >= 2047) PWM1_Flag = 1; } else { PWM1_Duty--; if(PWM1_Duty <= 0) PWM1_Flag = 0; } if(!PWM2_Flag) { PWM2_Duty++; if(PWM2_Duty >= 2047) PWM2_Flag = 1; } else { PWM2_Duty--; if(PWM2_Duty <= 0) PWM2_Flag = 0; } if(!PWM3_Flag) { PWM3_Duty++; if(PWM3_Duty >= 2047) PWM3_Flag = 1; } else { PWM3_Duty--; if(PWM3_Duty <= 0) PWM3_Flag = 0; } if(!PWM4_Flag) { PWM4_Duty++; if(PWM4_Duty >= 2047) PWM4_Flag = 1; } else { PWM4_Duty--; if(PWM4_Duty <= 0) PWM4_Flag = 0; } UpdatePwm(); } //======================================================================== // 函数: UpdatePwm(void) // 描述: 更新PWM占空比. // 参数: none. // 返回: none. // 版本: V1.0, 2012-11-22 //======================================================================== void UpdatePwm(void) { P_SW2 |= 0x80; PWMA_CCR1H = (u8)(PWM1_Duty >> 8); //设置占空比时间 PWMA_CCR1L = (u8)(PWM1_Duty); PWMA_CCR2H = (u8)(PWM2_Duty >> 8); //设置占空比时间 PWMA_CCR2L = (u8)(PWM2_Duty); PWMA_CCR3H = (u8)(PWM3_Duty >> 8); //设置占空比时间 PWMA_CCR3L = (u8)(PWM3_Duty); PWMA_CCR4H = (u8)(PWM4_Duty >> 8); //设置占空比时间 PWMA_CCR4L = (u8)(PWM4_Duty); P_SW2 &= 0x7f; }
我只使用了1路PWM
代码如下：
1 void PWMA_config(void) 2 { 3 PWMA_CCER1 = 0x00; //写 CCMRx 前必须先清零 CCxE 关闭通道 4 PWMA_CCER2 = 0x00; 5 PWMA_CCMR4 = 0x60; //设置 CC1 为 PWMA 输出模式 6 PWMA_CCER1 = 0x55; //配置通道输出使能和极性 7 PWMA_CCER2 = 0x55; 8 PWMA_ARRH = 0x03; //设置周期时间 9 PWMA_ARRL = 0xff; 10 PWMA_ENO = 0x00; 11 PWMA_ENO |= ENO4P; //使能输出 12 PWMA_PS = 0x00; //高级 PWM 通道输出脚选择位 13 PWMA_PS |= 0x40; //选择 PWM4_3 通道 14 PWMA_BKR = 0x80; //使能主输出 15 PWMA_CR1 |= 0x01; //开始计时 16 P_SW2 &= 0x7f; 17 } 18 19 void UpdatePwm(u16 duty) 20 { 21 P_SW2 |= 0x80; 22 23 PWMA_CCR4H = (u8)(duty >> 8); //设置占空比时间 24 PWMA_CCR4L = (u8)(duty); 25 P_SW2 &= 0x7f; 26 }