首个菜菜的dsp例程.zip三菱PLC编程案例源码资料编程控制器应用通讯通信例子程序实例

/*----------------------------------------- DSP菜鸟的第1个定时器模拟演示程序(未实战) HotPower@126.com 2005.6.12 于西安大雁塔村队部 http://hotpower.21ic.org -----------------------------------------*/ #include <cstdio> //C语言可以用stdio.h #include <cstring>//C语言可以用string.h #include "C5402DEF.h"// volatile bool IOXF; volatile unsigned int SystemRamTest; extern "C" interrupt void Timer0Isr(); /* * ======== main ======== */ class SystemObj {//系统类 public: SystemObj(void); public: inline void SystemInit(void); private: unsigned int SystemRamTest; }; SystemObj::SystemObj(void) { volatile unsigned int start; Disable();//关中断 for (start = 0; start < 10000; start ++); SystemInit(); } void SystemObj::SystemInit(void) { if (::SystemRamTest != 0x55aa) { ::SystemRamTest = 0x55aa; } if (SystemRamTest != 0x55aa) { SystemRamTest = 0x55aa; } IOXF = 0; } SystemObj Sys; int main(void) { unsigned int j = 1; Sys.SystemInit(); SREG->ST1 |= (1 << CPL); SREG->ST1 &= ~(1 << CPL); SREG->ST1 |= (1 << XF); SREG->ST1 &= ~(1 << XF); SREG->ST1 |= (1 << XF); SREG->ST1 &= ~(1 << XF); SREG->ST1 |= (1 << INTM);//应该用Disable();//关中断！！！ SREG->ST1 &= ~(1 << INTM);//应该用Enable();//开中断！！！ TIMER0->TCR |= (1 << TSS);//关闭启动定时器0 SREG->IMR = 0x0000; SREG->IFR = 0xffff; Enable();//开中断 TI_BASE_SREG->IMR = 0x9876; TI_BASE_SREG->IFR = 0x1234; SREG->IMR = 0x4321; SREG->IFR = 0xffff; for(int i = 0; i < 8; i ++) {//以下做着玩 SREG->IMR |= j; SREG->IFR &= ~j; j <<= 1; SREG->IMR = 0x4321; SREG->IFR = 0xffff; } SREG->IMR = (1 << TINT0);//允许TINT0中断 TIMER0->PRD = 5000; TIMER0->TCR &= ~(1 << TSS);//启动定时器0 while(1) { if (::IOXF) { SREG->ST1 |= (1 << XF); } else { SREG->ST1 &= ~(1 << XF); } } } interrupt void Timer0Isr() { ::IOXF = !::IOXF;//郁闷~~~中断中ST1被保护~~~ //SREG->ST1 |= (1 << XF);//被迫移入主程序中 // TIMER0->TCR |= (1 << TSS);//关闭启动定时器0 }