st_pwm_setup()

设定及使用为指定ST（Software Timer）的PWM模式

Description

void st_pwm_setup(int $st_id, int $pin, int $width, int $period [, string $div = “ms”])

Parameters

$st_id: 按PWM模式使用的ST账号
$pin: 输出信号的针号码
$width: 持续脉冲的HIGH区间
$period: 脉冲周期
$div: ST的单位 - sec (second), ms (milli second, 默认单位), us (micro second)

Return Value

none

Example

<?php
include "/lib/sd_340.php";
// Configuring ST0 as period 200us with 50% duty PWM with output signal pin 5 and start it
st_pwm_setup(0, 5, 100, 200);
// Configuring ST1 as period 100us with 10% duty PWM with output signal pin 9 and start it
st_pwm_setup(1, 9, 10, 100, "us");
?>

See also

< st_free_get_count()

st_pwm_width() >