delay20000大概0.01秒。1秒产生100000次中断(1次10us)。DELAY延时的意思。这个是麦克风的混响延时调节,是用来调节话筒声音的间隔时间差,调节越大,间隔声就越长。是音效调节器,就是让喇叭发出的声音延迟,持续4-5秒。
== 50 baud//P1OUT ^= BIT3;DELAY_US(20000);// 1/50*1000000 - (1/t)*f//DELAY_US(7000);//DELAY_US(15800); //47.5 baud} 开发者ID:joelrebel,项目名称:hab001,代码行数:31,代码来源:rtty.c 示例6: switch_pll_on ▲点赞 1▼ staticvoidswitch_pll_on(void){trx_irq_reason_tirq_sta...
就是执行20000次while(i--),是个粗略的延时并不是精确的多少us或ms的延时,但你可以把这个延时再放大N倍然后用秒表看实际及耗时然后再计算修改参数得到想要的精确延时函数
#define PMIC5_LCDB_OFF_ON_DELAY_US 20000struct ldo_regulator { struct regulator_desc rdesc; struct regulator_dev *rdev; @@ -1340,22 +1342,27 @@ static struct regulator_ops qpnp_lcdb_ncp_ops = {static int qpnp_lcdb_regulator_register(struct qpnp_lcdb *lcdb, u8 type)...
我们将低字节先赋值200D*(即:C8),然后再算高低节的定值,由式中可知125ms=200*((i值的高字节*6)+2),又可推算出(高低节*6)+2的总延迟时间应等于625us,将625/6=104.1666,取整数得到104,将104转成16进制得到68H,再将高字节和低字节组合起来即得到了定值,即:68C8HEX,代入函数即如下: 4楼2022-06-27 ...
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我们将低字节先赋值200D*(即:C8),然后再算高低节的定值,由式中可知125ms=200*((i值的高字节*6)+2),又可推算出(高低节*6)+2的总延迟时间应等于625us,将625/6=104.1666,取整数得到104,将104转成16进制得到68H,再将高字节和低字节组合起来即得到了定值,即:68C8HEX,代入函数即如下: ...
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