📄 ad.4
字号:
.\" SCCSID: @(#)ad.4 8.1 9/11/90.TH ad 4 VAX "" Unsupported.SH Namead \- Data Translation A/D converter.SH Syntax.B "device ad0 at uba0 csr 0170400 vector adintr".SH DescriptionThe.PN adconverter provides the interface to the Data Translation A/D converter.This isnota real-time driver, but merely allowsthe user process to sample the board's channels one at a time.Each minor device selects a different A/D board..PPThe driver communicates to a user process by means of ioctls.The AD_CHAN ioctl selects which channel of the board to read.For example,.br.in +.5ichan = 5;ioctl(fd, AD_CHAN, &chan);.in -.5iselects channel 5.The AD_READ ioctl actually reads the data and returns it to the userprocess.An example is.br.in +.5iioctl(fd, AD_READ, &data);.in -.5i.SH Files.PN /dev/ad
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -