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STC芯片PCA定時器功能與T2定時器基本一樣，操作方法相似不相同。
STC官方示例：
- /*---------------------------------------------------------------------*/
- /* --- STC MCU Limited ------------------------------------------------*/
- /* --- STC15F4K60S4 系列 PCA實現(xiàn)16位定時器舉例-------------------------*/
- /* --- Mobile: (86)13922805190 ----------------------------------------*/
- /* --- Fax: 86-0513-55012956,55012947,55012969 ------------------------*/
- /* --- Tel: 86-0513-55012928,55012929,55012966-------------------------*/
- /* --- Web: www.STCMCU.com --------------------------------------------*/
- /* --- Web: www.GXWMCU.com --------------------------------------------*/
- /* 如果要在程序中使用此代碼,請在程序中注明使用了STC的資料及程序 */
- /* 如果要在文章中應(yīng)用此代碼,請在文章中注明使用了STC的資料及程序 */
- /*---------------------------------------------------------------------*/
- //本示例在Keil開發(fā)環(huán)境下請選擇Intel的8058芯片型號進(jìn)行編譯
- //若無特別說明,工作頻率一般為11.0592MHz
- #include "reg51.h"
- #include "intrins.h"
- #define FOSC 11059200L
- #define T100Hz (FOSC / 12 / 100)
- typedef unsigned char BYTE;
- typedef unsigned int WORD;
- sfr P0M1 = 0x93;
- sfr P0M0 = 0x94;
- sfr P1M1 = 0x91;
- sfr P1M0 = 0x92;
- sfr P2M1 = 0x95;
- sfr P2M0 = 0x96;
- sfr P3M1 = 0xb1;
- sfr P3M0 = 0xb2;
- sfr P4M1 = 0xb3;
- sfr P4M0 = 0xb4;
- sfr P5M1 = 0xC9;
- sfr P5M0 = 0xCA;
- sfr P6M1 = 0xCB;
- sfr P6M0 = 0xCC;
- sfr P7M1 = 0xE1;
- sfr P7M0 = 0xE2;
- sfr P_SW1 = 0xA2; //外設(shè)功能切換寄存器1
- #define CCP_S0 0x10 //P_SW1.4
- #define CCP_S1 0x20 //P_SW1.5
- sfr CCON = 0xD8; //PCA控制寄存器
- sbit CCF0 = CCON^0; //PCA模塊0中斷標(biāo)志
- sbit CCF1 = CCON^1; //PCA模塊1中斷標(biāo)志
- sbit CR = CCON^6; //PCA定時器運行控制位
- sbit CF = CCON^7; //PCA定時器溢出標(biāo)志
- sfr CMOD = 0xD9; //PCA模式寄存器
- sfr CL = 0xE9; //PCA定時器低字節(jié)
- sfr CH = 0xF9; //PCA定時器高字節(jié)
- sfr CCAPM0 = 0xDA; //PCA模塊0模式寄存器
- sfr CCAP0L = 0xEA; //PCA模塊0捕獲寄存器 LOW
- sfr CCAP0H = 0xFA; //PCA模塊0捕獲寄存器 HIGH
- sfr CCAPM1 = 0xDB; //PCA模塊1模式寄存器
- sfr CCAP1L = 0xEB; //PCA模塊1捕獲寄存器 LOW
- sfr CCAP1H = 0xFB; //PCA模塊1捕獲寄存器 HIGH
- sfr PCAPWM0 = 0xf2;
- sfr PCAPWM1 = 0xf3;
- sbit PCA_LED = P1^0; //PCA測試LED
- BYTE cnt;
- WORD value;
- void PCA_isr() interrupt 7
- {
- CCF0 = 0; //清中斷標(biāo)志
- CCAP0L = value;
- CCAP0H = value >> 8; //更新比較值
- value += T100Hz;
- if (cnt-- == 0)
- {
- cnt = 100; //記數(shù)100次
- PCA_LED = !PCA_LED; //每秒閃爍一次
- }
- }
- void main()
- {
- P0M0 = 0x00;
- P0M1 = 0x00;
- P1M0 = 0x00;
- P1M1 = 0x00;
- P2M0 = 0x00;
- P2M1 = 0x00;
- P3M0 = 0x00;
- P3M1 = 0x00;
- P4M0 = 0x00;
- P4M1 = 0x00;
- P5M0 = 0x00;
- P5M1 = 0x00;
- P6M0 = 0x00;
- P6M1 = 0x00;
- P7M0 = 0x00;
- P7M1 = 0x00;
- ACC = P_SW1;
- ACC &= ~(CCP_S0 | CCP_S1); //CCP_S0=0 CCP_S1=0
- P_SW1 = ACC; //(P1.2/ECI, P1.1/CCP0, P1.0/CCP1, P3.7/CCP2)
-
- // ACC = P_SW1;
- // ACC &= ~(CCP_S0 | CCP_S1); //CCP_S0=1 CCP_S1=0
- // ACC |= CCP_S0; //(P3.4/ECI_2, P3.5/CCP0_2, P3.6/CCP1_2, P3.7/CCP2_2)
- // P_SW1 = ACC;
- //
- // ACC = P_SW1;
- // ACC &= ~(CCP_S0 | CCP_S1); //CCP_S0=0 CCP_S1=1
- // ACC |= CCP_S1; //(P2.4/ECI_3, P2.5/CCP0_3, P2.6/CCP1_3, P2.7/CCP2_3)
- // P_SW1 = ACC;
- CCON = 0; //初始化PCA控制寄存器
- //PCA定時器停止
- //清除CF標(biāo)志
- //清除模塊中斷標(biāo)志
- CL = 0; //復(fù)位PCA寄存器
- CH = 0;
- CMOD = 0x00; //設(shè)置PCA時鐘源
- //禁止PCA定時器溢出中斷
- value = T100Hz;
- CCAP0L = value;
- CCAP0H = value >> 8; //初始化PCA模塊0
- value += T100Hz;
- CCAPM0 = 0x49; //PCA模塊0為16位定時器模式
- CR = 1; //PCA定時器開始工作
- EA = 1;
- cnt = 0;
- while (1);
- }
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