Timer

Introduction

The VEX IQ (1st gen)’s Brain has a timer that keeps track of elapsed time from the start of a project. It can be used to measure durations, trigger events after a set time, or reset for new timing operations.

Below is a list of all available blocks:

• reset timer – Resets the timer to zero.

• timer in seconds – Returns the current elapsed time in seconds.

• when timer – Runs a stack of blocks after the timer exceeds a specified time.

reset timer

The reset timer block resets the timer to zero.

The reset timer stack block.

重置计时器

Parameters	Description
	This block has no parameters.

Example

A stack of blocks that begins with a when started block, followed by a comment block reading Print the time on the screen and reset the time after five seconds. Inside a forever loop, a reset timer block starts the cycle. A while loop runs while the timer is less than or equal to three seconds, repeatedly clearing row 1, setting the cursor, and printing the timer value on the screen.

当开始
[Display the time the robot takes to turn right.]
驱动 [向前 v] (200) [毫米 v] ▶
重置计时器
[右 v] 转 (90) 度 ▶
将打印精度设置为 [0.1 v] 到 [Brain v]
在 [Brain v] 上打印 [Turn right took] ◀ 并设定光标为下一行
在 [Brain v] ▶上打印 (计时器秒数)
在 [Brain v] ▶上打印 [ seconds]

timer in seconds

The timer in seconds block returns the elapsed time since the timer was last reset, as a float in seconds.

The timer in seconds reporter block.

(计时器秒数)

Parameters	Description
	This block has no parameters.

Example

A stack of blocks that begins with a when started block, followed by a comment block reading Display the time after 2 seconds have passed. A wait until block pauses execution until the timer reaches or exceeds two seconds. Once this condition is met, a print block displays the timer value on the screen.

当开始
[Display the time it takes to move in a square.]
重复 (4)
驱动 [向前 v] (100) [毫米 v] ▶
[右 v] 转 (90) 度 ▶
结束
将打印精度设置为 [0.01 v] 到 [Brain v]
在 [Brain v] ▶上打印 (计时器秒数)

when timer

The when timer block activates the attached stack of blocks after a specified amount of time.

The when timer hat block.

当计时器> [1] 秒

Parameters	Description
time	Specifies the number of seconds before the attached stack of blocks starts. Accepts both whole and decimal numbers.

Example

A stack of blocks that begins with a when timer > 2 seconds block, followed by a comment block reading Play a fail after 2 seconds. Once the timer exceeds two seconds, a play sound block plays the fail sound.

当计时器> [2] 秒
[Play a sound after 2 seconds.]
播放声音 [闹钟 v]