准备将BF518的PG4引脚用作TIMR5，用来捕获输入脉冲的宽度和周期，但是PG4引脚有输入脉冲时，总进入不了中断程序，大家帮我分析分析。下面是我的程序。
void GPIO_ini（）
{
*pPORTG_FER = 0x0017; //PG0--PG2作为EMAC引脚使用,PG4用作TMR5
ssync();
*pPORTG_MUX &= 0xFFEC;
ssync();
}
EX_INTERRUPT_HANDLER(GP_IRQ_TIMER5)
{
Uint32 u32Pulse_Width ,u32Pulse_Periods;
*pTIMER_STATUS = TIMIL5;
u32Pulse_Width = *pTIMER5_WIDTH;
u32Pulse_Periods =*pTIMER5_PERIOD;
if((u32Pulse_Width >= 995000)&&(u32Pulse_Width <= 1005000))
{
if(u32Pulse_Width == (u32Pulse_Periods/2))
{
ucIrigB_State = 1;
}
}
}
// 通用定时器初始化。
void Ini_GP_Timer(void)
{
*pTIMER5_CONFIG = EMU_RUN|IRQ_ENA|PERIOD_CNT|PULSE_HI|WDTH_CAP;
ssync();
*pIMASK |= (1<<12); ssync();
*pILAT |= (1<<12);ssync();
*pSIC_IMASK1 |= 0x00000020; ssync();
*pSIC_IAR4 = 0xff5fffff;
ssync();
register_handler(ik_ivg12, GP_IRQ_TIMER5);
ssync();
*pILAT |= EVT_IVG12 ; ssync();
*pTIMER_ENABLE |= TIMEN5;
ssync();
}
您的位置：
2014/3/14 15:31:06
