【创龙C66x开发板试用体验】定时器中断调试

实验代码：

#include "KeyStone_common.h"
#define PIN_CONTROL_0 0x02620580
#define CLOCK_PERIOD_MS 1 //period (in millisecond) of the clock generated by timer
#define NUM_CLOCKS_GENERATED 500 //number of the clocks generated in this test
volatile Uint32 uiTick = 0;

void Timer_Interrupts_Init(void)
{
/**中断源选择**/
gpCGEM_regs->INTMUX1 = 0;
gpCGEM_regs->INTMUX2 = 0;
gpCGEM_regs->INTMUX3 = CSL_GEM_TINTLN< /*清空事件中断标志位*/
gpCGEM_regs->EVTCLR[0]= 0xFFFFFFFF;
gpCGEM_regs->EVTCLR[1]= 0xFFFFFFFF;
gpCGEM_regs->EVTCLR[2]= 0xFFFFFFFF;
gpCGEM_regs->EVTCLR[3]= 0xFFFFFFFF;

ICR= IFR; //清楚中断标志
IER = IER|(1<<14); //使能INT14
ISTP= 0x800000; /*中断向量表指针从 LL2 存储器开始*/
TSR = TSR|1; //使能全局中断
}

//Interrupt service routine for timer
void interrupt Timer_ISR(void)
{
ICR= IFR; //清楚中断标志
IER = IER&(0<<14); //使能INT14
uiTick++;
IER = IER|(1<<14); //使能INT14
}

void generate_clocks_by_timer()
{
Timer64_Config tmrCfg; //声明定时器配置结构体

tmrCfg.timer_num= DNUM;
tmrCfg.timerMode= TIMER_PERIODIC_CLOCK;
tmrCfg.period= (unsigned long long)CLOCK_PERIOD_MS*gDSP_Core_Speed_Hz/6000;
Timer64_Init(&tmrCfg);
}

void GPIO_init()
{
/*GPIO19 GPIO22 GPIO23 为三个led的控制引脚*/
(*((volatile unsigned int *)(PIN_CONTROL_0))) |= (1<<19) | (1<<22) | (1<<23);
/*set GPIO direction*/
gpGPIO_regs->BANK_REGISTERS[0].DIR &= ~((1<<19) | (1<<22) | (1<<23)); // 给寄存器清零，0：输出；1：输入
/*clear output data*/
gpGPIO_regs->BANK_REGISTERS[0].CLR_DATA |= (1<<19) | (1<<22) | (1<<23); // 给寄存器置1，0：输出；1：输入
}
void main()
{
/*配置系统时钟为1000MHz*/
KeyStone_main_PLL_init(100, 10, 1);
GPIO_init();
Timer_Interrupts_Init(); //定时器产生1ms中断
generate_clocks_by_timer();
gpGPIO_regs->BANK_REGISTERS[0].CLR_DATA |= (1<<19)|(1<<22)|(1<<23);
while(1)
{
if( uiTick < 1000)
{
gpGPIO_regs->BANK_REGISTERS[0].SET_DATA |= (1<<19); //点亮D3
}
else if((uiTick > 1000) && (uiTick < 2000))
{
gpGPIO_regs->BANK_REGISTERS[0].CLR_DATA |= (1<<19);
}
else if(uiTick > 2000)
{
uiTick = 0;
}
}
}
实验结果，试用版底板上的D3灯会以2s周期性的亮灭。