201 lines
7.6 KiB
C
201 lines
7.6 KiB
C
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/*------------------------------------------------------------------*/
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/* --- STC MCU International Limited -------------------------------*/
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/* --- STC 1T Series MCU RC Demo -----------------------------------*/
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/* --- Mobile: (86)13922805190 -------------------------------------*/
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/* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/
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/* --- Tel: 86-0513-55012928,55012929,55012966 ---------------------*/
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/* --- Web: www.GXWMCU.com -----------------------------------------*/
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/* --- QQ: 800003751 ----------------------------------------------*/
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/* If you want to use the program or the program referenced in the */
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/* article, please specify in which data and procedures from STC */
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/*------------------------------------------------------------------*/
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#include "PCA.h"
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bit B_Capture0,B_Capture1,B_Capture2;
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u8 PCA0_mode,PCA1_mode,PCA2_mode;
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u16 CCAP0_tmp,PCA_Timer0;
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u16 CCAP1_tmp,PCA_Timer1;
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u16 CCAP2_tmp,PCA_Timer2;
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/************* 功能说明 **************
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******************************************/
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u16 PWM0_low; //PWM输出低电平的PCA时钟脉冲个数, 用户层不可见。
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u16 PWM1_low; //PWM输出低电平的PCA时钟脉冲个数, 用户层不可见。
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u16 PWM2_low; //PWM输出低电平的PCA时钟脉冲个数, 用户层不可见。
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//========================================================================
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// 函数: void PWMn_Update(u8 PCA_id, u16 high)
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// 描述: 更新占空比数据。
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// 参数: high: 占空比数据，即PWM输出高电平的PCA时钟脉冲个数。
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// 返回: 无
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// 版本: VER1.0
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// 日期: 2013-5-15
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// 备注:
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//========================================================================
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void PWMn_Update(u8 PCA_id, u16 high)
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{
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if(PCA_id == PCA0)
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{
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if(high > PWM0_HIGH_MAX) high = PWM0_HIGH_MAX; //如果写入大于最大占空比数据，强制为最大占空比。
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if(high < PWM0_HIGH_MIN) high = PWM0_HIGH_MIN; //如果写入小于最小占空比数据，强制为最小占空比。
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CR = 0; //停止PCA。
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PCA_Timer0 = high; //数据在正确范围，则装入占空比寄存器。
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PWM0_low = PWM0_DUTY - high; //计算并保存PWM输出低电平的PCA时钟脉冲个数。
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CR = 1; //启动PCA。
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}
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else if(PCA_id == PCA1)
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{
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if(high > PWM1_HIGH_MAX) high = PWM1_HIGH_MAX; //如果写入大于最大占空比数据，强制为最大占空比。
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if(high < PWM1_HIGH_MIN) high = PWM1_HIGH_MIN; //如果写入小于最小占空比数据，强制为最小占空比。
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CR = 0; //停止PCA。
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PCA_Timer1 = high; //数据在正确范围，则装入占空比寄存器。
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PWM1_low = PWM1_DUTY - high; //计算并保存PWM输出低电平的PCA时钟脉冲个数。
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CR = 1; //启动PCA。
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}
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else if(PCA_id == PCA2)
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{
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if(high > PWM2_HIGH_MAX) high = PWM2_HIGH_MAX; //如果写入大于最大占空比数据，强制为最大占空比。
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if(high < PWM2_HIGH_MIN) high = PWM2_HIGH_MIN; //如果写入小于最小占空比数据，强制为最小占空比。
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CR = 0; //停止PCA。
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PCA_Timer2 = high; //数据在正确范围，则装入占空比寄存器。
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PWM2_low = PWM2_DUTY - high; //计算并保存PWM输出低电平的PCA时钟脉冲个数。
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CR = 1; //启动PCA。
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}
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}
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//========================================================================
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// 函数: void UpdatePwm(u8 PCA_id, u8 pwm_value)
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// 描述: 更新PWM值.
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// 参数: PCA_id: PCA序号. 取值 PCA0,PCA1,PCA2,PCA_Counter
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// pwm_value: pwm值, 这个值是输出低电平的时间.
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// 返回: none.
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// 版本: V1.0, 2012-11-22
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//========================================================================
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/*
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void UpdatePwm(u8 PCA_id, u8 pwm_value)
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{
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if(PCA_id == PCA0) CCAP0H = pwm_value;
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else if(PCA_id == PCA1) CCAP1H = pwm_value;
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else if(PCA_id == PCA2) CCAP2H = pwm_value;
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}
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*/
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//========================================================================
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// 函数: void PCA_Init(PCA_id, PCA_InitTypeDef *PCAx)
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// 描述: PCA初始化程序.
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// 参数: PCA_id: PCA序号. 取值 PCA0,PCA1,PCA2,PCA_Counter
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// PCAx: 结构参数,请参考PCA.h里的定义.
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// 返回: none.
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// 版本: V1.0, 2012-11-22
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//========================================================================
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void PCA_Init(u8 PCA_id, PCA_InitTypeDef *PCAx)
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{
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if(PCA_id > PCA_Counter) return; //id错误
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if(PCA_id == PCA_Counter) //设置公用Counter
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{
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CR = 0;
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CH = 0;
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CL = 0;
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AUXR1 = (AUXR1 & ~(3<<4)) | PCAx->PCA_IoUse; //切换IO口
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CMOD = (CMOD & ~(7<<1)) | PCAx->PCA_Clock; //选择时钟源
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CMOD = (CMOD & ~1) | (PCAx->PCA_Interrupt_Mode & 1); //ECF
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if(PCAx->PCA_Polity == PolityHigh) PPCA = 1; //高优先级中断
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else PPCA = 0; //低优先级中断
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if(PCAx->PCA_RUN == ENABLE) CR = 1;
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return;
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}
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PCAx->PCA_Interrupt_Mode &= (3<<4) + 1;
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if(PCAx->PCA_Mode >= PCA_Mode_SoftTimer) PCAx->PCA_Interrupt_Mode &= ~(3<<4);
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if(PCA_id == PCA0)
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{
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CCAPM0 = PCAx->PCA_Mode | PCAx->PCA_Interrupt_Mode; //工作模式, 中断模式
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PCA_PWM0 = (PCA_PWM0 & ~(3<<6)) | PCAx->PCA_PWM_Wide; //PWM宽度
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PCA_Timer0 = PCAx->PCA_Value;
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B_Capture0 = 0;
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PCA0_mode = PCAx->PCA_Mode;
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CCAP0_tmp = PCA_Timer0;
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CCAP0L = (u8)CCAP0_tmp; //将影射寄存器写入捕获寄存器，先写CCAP0L
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CCAP0H = (u8)(CCAP0_tmp >> 8); //后写CCAP0H
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}
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if(PCA_id == PCA1)
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{
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CCAPM1 = PCAx->PCA_Mode | PCAx->PCA_Interrupt_Mode;
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PCA_PWM1 = (PCA_PWM1 & ~(3<<6)) | PCAx->PCA_PWM_Wide;
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PCA_Timer1 = PCAx->PCA_Value;
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B_Capture1 = 0;
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PCA1_mode = PCAx->PCA_Mode;
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CCAP1_tmp = PCA_Timer1;
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CCAP1L = (u8)CCAP1_tmp; //将影射寄存器写入捕获寄存器，先写CCAP0L
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CCAP1H = (u8)(CCAP1_tmp >> 8); //后写CCAP0H
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}
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if(PCA_id == PCA2)
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{
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CCAPM2 = PCAx->PCA_Mode | PCAx->PCA_Interrupt_Mode;
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PCA_PWM2 = (PCA_PWM2 & ~(3<<6)) | PCAx->PCA_PWM_Wide;
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PCA_Timer2 = PCAx->PCA_Value;
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B_Capture2 = 0;
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PCA2_mode = PCAx->PCA_Mode;
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CCAP2_tmp = PCA_Timer2;
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CCAP2L = (u8)CCAP2_tmp; //将影射寄存器写入捕获寄存器，先写CCAP0L
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CCAP2H = (u8)(CCAP2_tmp >> 8); //后写CCAP0H
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}
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}
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//========================================================================
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// 函数: void PCA_Handler (void) interrupt PCA_VECTOR
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// 描述: PCA中断处理程序.
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// 参数: None
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// 返回: none.
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// 版本: V1.0, 2012-11-22
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//========================================================================
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void PCA_Handler (void) interrupt PCA_VECTOR
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{
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if(CCF0) //PCA模块0中断
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{
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CCF0 = 0; //清PCA模块0中断标志
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if(P11) CCAP0_tmp += PCA_Timer0; //输出为高电平，则给影射寄存器装载高电平时间长度
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else CCAP0_tmp += PWM0_low; //输出为低电平，则给影射寄存器装载低电平时间长度
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CCAP0L = (u8)CCAP0_tmp; //将影射寄存器写入捕获寄存器，先写CCAP0L
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CCAP0H = (u8)(CCAP0_tmp >> 8); //后写CCAP0H
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}
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if(CCF1) //PCA模块1中断
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{
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CCF1 = 0; //清PCA模块1中断标志
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if(P10) CCAP1_tmp += PCA_Timer1; //输出为高电平，则给影射寄存器装载高电平时间长度
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else CCAP1_tmp += PWM1_low; //输出为低电平，则给影射寄存器装载低电平时间长度
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CCAP1L = (u8)CCAP1_tmp; //将影射寄存器写入捕获寄存器，先写CCAP0L
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CCAP1H = (u8)(CCAP1_tmp >> 8); //后写CCAP0H
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}
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if(CCF2) //PCA模块2中断
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{
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CCF2 = 0; //清PCA模块1中断标志
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if(P37) CCAP2_tmp += PCA_Timer2; //输出为高电平，则给影射寄存器装载高电平时间长度
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else CCAP2_tmp += PWM2_low; //输出为低电平，则给影射寄存器装载低电平时间长度
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CCAP2L = (u8)CCAP2_tmp; //将影射寄存器写入捕获寄存器，先写CCAP0L
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CCAP2H = (u8)(CCAP2_tmp >> 8); //后写CCAP0H
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}
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/* if(CF) //PCA溢出中断
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{
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CF = 0; //清PCA溢出中断标志
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}
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*/
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} |