使用Haawking IDE建立HXS320F28034的Timer定时器外设实现LED灯的闪烁

电子

`新建工程的详情见：使用Haawking IDE 新建一个LED闪烁的工程 - 中科昊芯 DSP - 电子技术论坛 - 广受欢迎的专业电子论坛! (elecfans.com)，即上一个帖子。
一、编写程序
第一步：定时器初始化函数
//---------------------------------------------------------------------------
// InitCputimers:
//---------------------------------------------------------------------------
// This function initializes all three CPU timers to a known state.
//
void InitCpuTimers(void)
{
// CPU Timer 0
// Initialize address pointers to respective timer registers:
CpuTimer0.RegsAddr = &CpuTimer0Regs;
// Initialize timer period to maximum:
CpuTimer0Regs.PRD.all  = 0xFFFFFFFF;
// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):
CpuTimer0Regs.TPR.all  = 0;

// Make sure timer is stopped:
CpuTimer0Regs.TCR.bit.TSS = 1;
// Reload all counter register with period value:
CpuTimer0Regs.TCR.bit.TRB = 1;
// Reset interrupt counters:
CpuTimer0.InterruptCount = 0;

// CpuTimer 1 and CpuTimer2 are reserved for DSP BIOS & other RTOS
// Do not use these two timers if you ever plan on integrating
// DSP-BIOS or another realtime OS.
//
// Initialize address pointers to respective timer registers:
CpuTimer1.RegsAddr = &CpuTimer1Regs;
CpuTimer2.RegsAddr = &CpuTimer2Regs;
// Initialize timer period to maximum:
CpuTimer1Regs.PRD.all  = 0xFFFFFFFF;
CpuTimer2Regs.PRD.all  = 0xFFFFFFFF;
// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):
CpuTimer1Regs.TPR.all  = 0;

CpuTimer2Regs.TPR.all  = 0;

// Make sure timers are stopped:
CpuTimer1Regs.TCR.bit.TSS = 1;
CpuTimer2Regs.TCR.bit.TSS = 1;
// Reload all counter register with period value:
CpuTimer1Regs.TCR.bit.TRB = 1;
CpuTimer2Regs.TCR.bit.TRB = 1;
// Reset interrupt counters:
CpuTimer1.InterruptCount = 0;
CpuTimer2.InterruptCount = 0;

}

//---------------------------------------------------------------------------
// ConfigCpuTimer:
//---------------------------------------------------------------------------
// This function initializes the selected timer to the period specified
// by the "Freq" and "Period" parameters. The "Freq" is entered as "MHz"
// and the period in "uSeconds". The timer is held in the stopped state
// after configuration.
//
void ConfigCpuTimer(struct CPUTIMER_VARS *Timer, float Freq, float Period)
{
Uint32 temp;

// Initialize timer period:
Timer->CPUFreqInMHz = Freq;
Timer->PeriodInUSec = Period;
temp = (long) (Freq * Period);
Timer->RegsAddr->PRD.all = temp;

// Set pre-scale counter to divide by 1 (SYSCLKOUT):
Timer->RegsAddr->TPR.all  = 0;

// Initialize timer control register:
Timer->RegsAddr->TCR.bit.TSS = 1;    // 1 = Stop timer, 0 = Start/Restart Timer
Timer->RegsAddr->TCR.bit.TRB = 1;    // 1 = reload timer
Timer->RegsAddr->TCR.bit.SOFT = 0;
Timer->RegsAddr->TCR.bit.FREE = 0;    // Timer Free Run Disabled
Timer->RegsAddr->TCR.bit.TIE = 1;    // 0 = Disable/ 1 = Enable Timer Interrupt

// Reset interrupt counter:
Timer->InterruptCount = 0;
}

//===========================================================================
// End of file.
//===========================================================================
第二步：初始化中断函数、调用定时器初始化，当计数减到0的时候，控制灯闪烁

int main(void)
{
// volatile unsigned int i;

InitSysCtrl();  //配置系统时钟是60MHz

LEDInit();
BeepInit();

DINT; //Clear all interrupts and initialize PIE vector table

IER_DISABLE(0xffff);    //禁能所有中断
IFR_DISABLE(0xffff);          //清所有中断标志位

InitPieVectTable(); //初始化PIE 向量表

InitCpuTimers();  //调用官方库函数，初始化CPU定时器

ConfigCpuTimer(&CpuTimer1, 60, 500000);//定时器1初始化，第二个参数为CPU SYSCLK = 60M，第三个参数为设定的周期，us单位

CpuTimer1Regs.TCR.bit.TSS = 0;// To start or restart the CPU-timer, set TSS to 0

ConfigCpuTimer(&CpuTimer2, 60,100000 );//定时器2初始化，第二个参数为CPU SYSCLK = 60M，第三个参数为设定的周期，us单位
CpuTimer2Regs.TCR.bit.TSS = 0;// To start or restart the CPU-timer, set TSS to 0

while(1){
         if(CpuTimer1Regs.TCR.bit.TIF == 1)
         {
            CpuTimer1Regs.TCR.bit.TIF = 1;// clear flag
            GpioDataRegs.GPBTOGGLE.bit.GPIO41 = 1;//GPIO41电平翻转，D400交互闪烁
         }
         if(CpuTimer2Regs.TCR.bit.TIF == 1)
         {
            CpuTimer2Regs.TCR.bit.TIF = 1;
            GpioDataRegs.GPBTOGGLE.bit.GPIO34 = 1;//GPIO34电平翻转，D401交互闪烁
            if(GpioDataRegs.GPADAT.bit.GPIO27 == 0)  //有按键按下，D402亮一下在灭，蜂鸣器响一下
            {
            GpioDataRegs.GPBCLEAR.bit.GPIO43 = 1; //D402亮，低电平亮，GPIO43置低
            GpioDataRegs.GPASET.bit.GPIO6 = 1; //蜂鸣器响
            }
            else
            {
            GpioDataRegs.GPBSET.bit.GPIO43 =1; //D402灭
            GpioDataRegs.GPACLEAR.bit.GPIO6 = 1; //蜂鸣器不亮
            }
         }

}

return 0;
}

// ----------------------------------------------------------------------------
二、实验现象
进入仿真环境，可以将定时器的寄存器添加到watch expression

运行现象截图

`

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使用Haawking IDE建立HXS320F28034的Timer定时器外设实现LED灯的闪烁

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