if ((TIM1->IER & TIM1_IER_CC2IE) && (TIM1->SR1 & TIM1_SR1_CC2IF))
{
TIM1->SR1 &= (u8) (~TIM1_SR1_CC2IF);
ret = get_nth_width(&_irwave, ir_eng._cur_send_bit, &width);//取得红外波的长度
if ((0x00 == ret) || (ir_eng._cur_send_bit >= ir_eng._cur_wave_bit))
{
stop_compare();
ir_eng.g_ir_state = IR_IDLE;
return;
}
ir_eng._cur_send_bit++;//取波的个数
if (width & 0x8000)
{
pwm_stop();//如果是低电平，进入这个函数。
}
else
{
pwm_start();
}
next_lbl:
cur = TIM1_GetCapture2();
width &= 0x7FFF;//过滤负号，取得真实的脉宽值
cur += width;
TIM1_SetCompare2(cur);
}
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转播
