STC15系列库函数与例程11-PCA-PWM-软件定时-捕捉.zip

/*------------------------------------------------------------------*/ /* --- STC MCU International Limited -------------------------------*/ /* --- STC 1T Series MCU RC Demo -----------------------------------*/ /* --- Mobile: (86)13922805190 -------------------------------------*/ /* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/ /* --- Tel: 86-0513-55012928,55012929,55012966 ---------------------*/ /* --- Web: www.GXWMCU.com -----------------------------------------*/ /* --- QQ: 800003751 ----------------------------------------------*/ /* If you want to use the program or the program referenced in the */ /* article, please specify in which data and procedures from STC */ /*------------------------------------------------------------------*/ #include "config.h" #include "timer.h" #include "USART.h" #include "PCA.h" /************* 功能说明 ************** PCA0 为8位PWM. 输出变化的PWM信号。类似"呼吸灯"的驱动. PCA1 为捕捉. 可以连接到P2.7用来测试捕捉,捕捉的时间从串口1输出. 也可以从外部输入一个信号来捕捉. PCA2 为16位软件定时, 定时时间为30000个PCA时钟, 并且从P2.7高速这个信号,输出周期为60000个PCA时钟. P2.7可以连接到P2.6用来测试捕捉,捕捉的时间从串口1输出. 串口1和串口2把收到的数据原样返回. 定时器0产生1ms的基准,作为程序运行的节拍. ******************************************/ /************* 本地常量声明 **************/ /************* 本地变量声明 **************/ u8 cnt0; u16 Cap_time; //上一次捕捉时间 u8 pwm0; //pwm bit B_PWM0_Dir; //方向, 0为+, 1为-. /************* 本地函数声明 **************/ /************* 外部函数和变量声明 *****************/ extern bit B_Timer0_1ms; void Timer_config(void) { TIM_InitTypeDef TIM_InitStructure; //结构定义 TIM_InitStructure.TIM_Mode = TIM_16BitAutoReload; //指定工作模式, TIM_16BitAutoReload,TIM_16Bit,TIM_8BitAutoReload,TIM_16BitAutoReloadNoMask TIM_InitStructure.TIM_Polity = PolityLow; //指定中断优先级, PolityHigh,PolityLow TIM_InitStructure.TIM_Interrupt = ENABLE; //中断是否允许, ENABLE或DISABLE TIM_InitStructure.TIM_ClkSource = TIM_CLOCK_12T; //指定时钟源, TIM_CLOCK_1T,TIM_CLOCK_12T,TIM_CLOCK_Ext TIM_InitStructure.TIM_ClkOut = DISABLE; //是否输出高速脉冲, ENABLE或DISABLE TIM_InitStructure.TIM_Value = 65536UL - ((1000 * Main_Fosc_KHZ) / 12000); //初值, 1000us TIM_InitStructure.TIM_Run = ENABLE; //是否初始化后启动定时器, ENABLE或DISABLE Timer_Inilize(Timer0,&TIM_InitStructure); //初始化Timer0 Timer0,Timer1,Timer2 } void UART_config(void) { COMx_InitDefine COMx_InitStructure; //结构定义 COMx_InitStructure.UART_Mode = UART_8bit_BRTx; //模式, UART_ShiftRight,UART_8bit_BRTx,UART_9bit,UART_9bit_BRTx COMx_InitStructure.UART_BRT_Use = BRT_Timer1; //使用波特率, BRT_Timer1, BRT_Timer2 (注意: 串口2固定使用BRT_Timer2) COMx_InitStructure.UART_BaudRate = 115200ul; //波特率, 一般 110 ~ 115200 COMx_InitStructure.UART_RxEnable = ENABLE; //接收允许, ENABLE或DISABLE COMx_InitStructure.BaudRateDouble = DISABLE; //波特率加倍, ENABLE或DISABLE COMx_InitStructure.UART_Interrupt = ENABLE; //中断允许, ENABLE或DISABLE COMx_InitStructure.UART_Polity = PolityLow; //中断优先级, PolityLow,PolityHigh COMx_InitStructure.UART_P_SW = UART1_SW_P30_P31; //切换端口, UART1_SW_P30_P31,UART1_SW_P36_P37,UART1_SW_P16_P17(必须使用内部时钟) COMx_InitStructure.UART_RXD_TXD_Short = DISABLE; //内部短路RXD与TXD, 做中继, ENABLE,DISABLE USART_Configuration(USART1, &COMx_InitStructure); //初始化串口1 USART1,USART2 COMx_InitStructure.UART_Mode = UART_8bit_BRTx; //模式, UART_ShiftRight,UART_8bit_BRTx,UART_9bit,UART_9bit_BRTx COMx_InitStructure.UART_BaudRate = 57600ul; //波特率, 110 ~ 115200 COMx_InitStructure.UART_RxEnable = ENABLE; //接收允许, ENABLE或DISABLE COMx_InitStructure.UART_Interrupt = ENABLE; //中断允许, ENABLE或DISABLE COMx_InitStructure.UART_Polity = PolityLow; //中断优先级, PolityLow,PolityHigh COMx_InitStructure.UART_P_SW = UART2_SW_P10_P11; //切换端口, UART2_SW_P10_P11,UART2_SW_P46_P47 USART_Configuration(USART2, &COMx_InitStructure); //初始化串口2 USART1,USART2 PrintString1("STC15F2K60S2 PCA Test Prgramme!\r\n"); //SUART1发送一个字符串 PrintString2("STC15F2K60S2 PCA Test Prgramme!\r\n"); //SUART2发送一个字符串 } void PCA_config(void) { PCA_InitTypeDef PCA_InitStructure; PCA_InitStructure.PCA_Clock = PCA_Clock_12T; //PCA_Clock_1T, PCA_Clock_2T, PCA_Clock_4T, PCA_Clock_6T, PCA_Clock_8T, PCA_Clock_12T, PCA_Clock_Timer0_OF, PCA_Clock_ECI PCA_InitStructure.PCA_IoUse = PCA_P24_P25_P26_P27; //PCA_P12_P11_P10_P37, PCA_P34_P35_P36_P37, PCA_P24_P25_P26_P27 PCA_InitStructure.PCA_Interrupt_Mode = DISABLE; //ENABLE, DISABLE PCA_InitStructure.PCA_Polity = PolityHigh; //优先级设置 PolityHigh,PolityLow PCA_InitStructure.PCA_RUN = DISABLE; //ENABLE, DISABLE PCA_Init(PCA_Counter,&PCA_InitStructure); PCA_InitStructure.PCA_Mode = PCA_Mode_PWM; //PCA_Mode_PWM, PCA_Mode_Capture, PCA_Mode_SoftTimer, PCA_Mode_HighPulseOutput PCA_InitStructure.PCA_PWM_Wide = PCA_PWM_8bit; //PCA_PWM_8bit, PCA_PWM_7bit, PCA_PWM_6bit PCA_InitStructure.PCA_Interrupt_Mode = DISABLE; //PCA_Rise_Active, PCA_Fall_Active, ENABLE, DISABLE PCA_InitStructure.PCA_Value = 128 << 8; //对于PWM,高8位为PWM占空比 PCA_Init(PCA0,&PCA_InitStructure); PCA_InitStructure.PCA_Mode = PCA_Mode_Capture; //PCA_Mode_PWM, PCA_Mode_Capture, PCA_Mode_SoftTimer, PCA_Mode_HighPulseOutput PCA_InitStructure.PCA_PWM_Wide = 0; //PCA_PWM_8bit, PCA_PWM_7bit, PCA_PWM_6bit PCA_InitStructure.PCA_Interrupt_Mode = PCA_Fall_Active | ENABLE; //(PCA_Rise_Active, PCA_Fall_Active) or (ENABLE, DISABLE) PCA_InitStructure.PCA_Value = 0; //对于捕捉, 这个值没意义 PCA_Init(PCA1,&PCA_InitStructure); PCA_InitStructure.PCA_Mode = PCA_Mode_HighPulseOutput; //PCA_Mode_PWM, PCA_Mode_Capture, PCA_Mode_SoftTimer, PCA_Mode_HighPulseOutput PCA_InitStructure.PCA_PWM_Wide = 0; //PCA_PWM_8bit, PCA_PWM_7bit, PCA_PWM_6bit PCA_InitStructure.PCA_Interrupt_Mode = ENABLE; //PCA_Rise_Active, PCA_Fall_Active, ENABLE, DISABLE PCA_InitStructure.PCA_Value = 30000; //对于软件定时, 为匹配比较值 PCA_Init(PCA2,&PCA_InitStructure); CR = 1; } /******************** task A **************************/ void main(void) { u8 i; u16 j; Timer_config(); UART_config(); PCA_config(); EA = 1; Cap_time = 0; pwm0 = 128; B_PWM0_Dir = 0; while (1) { if(B_Timer0_1ms) { B_Timer0_1ms = 0; if(B_Capture1) { B_Capture1 = 0; j = CCAP1_tmp - Cap_time; //计算时间差 Cap_time = CCAP1_tmp; TX1_write2buff(j/10000 + '0'); TX1_write2buff(j%10000/1000 + '0'); TX1_write2buff(j%1000/100 + '0'); TX1_write2buff(j%100/10 + '0'); TX1_write2buff(j%10 + '0'); PrintString1("\r\n"); } cnt0++; if((cnt0 & 15) == 15) //16ms { if(B_PWM0_Dir) { if(--pwm0 <= 8) B_PWM0_Dir = 0; } else if(++pwm0 >= 248) B_PWM0_Dir = 1; UpdatePwm(PCA0,pwm0); } if(COM1.RX_TimeOut > 0) //超时计数 { if(--COM1.RX_TimeOut == 0) { if(COM1.RX_Cnt > 0) { for(i=0; i<COM1.RX_Cnt; i++) TX1_write2buff(RX1_Buffer[i]); //收到的数据原样返回 } COM1.RX_Cnt = 0; } } if(COM2.RX_TimeOut > 0) //超时计数 { if(--COM2.RX_TimeOut == 0) { if(COM2.RX_Cnt > 0) { for(i=0; i<COM2.RX_Cnt; i++) TX2_write2buff(RX2_Buffer[i]); //收到的数据原样返回 } COM2.RX_Cnt = 0; } } } } }