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UM0851 bảng dữ liệu(PDF) 185 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  SPEAr is a family of highly customizable ARM-based embedded
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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UM0851 bảng dữ liệu(HTML) 185 Page - STMicroelectronics

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UM0851
Human interface device (HID) drivers
Doc ID 16604 Rev 2
185/245
Figure 50.
ADC driver architecture
7.3.3
ADC usage in Linux
ADC can be accessed from two levels in Linux:
User level: User level applications must include include/linux/spr_adc_st10_usr.h file to
access data types related to ADC. In order to use the ADC at user level you need to create
nodes for the ADC. The major number is allocated dynamically to the ADC driver. To obtain
the major number of the ADC, run the following command after startup:
cat /proc/devices
Character devices:
1 mem
2 pty
3 ttyp
4 /dev/vc/0
4 tty
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
7 vcs
9 st
10 misc
13 input
29 fb
89 i2c
90 mtd
128 ptm
136 pts
180 usb
189 usb_device
206 osst
250 usb_endpoint
251 C3
252 spear-adc
254 rtc
User space
Kernel space
Hardware
Linux char device framework
Linux drivers
ADC driver
ADC (ST10) IP
User application



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