I2C: Diferență între versiuni
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I2C Block Read yes | I2C Block Read yes | ||
</syntaxhighlight> | </syntaxhighlight> | ||
i2cdetect is a userspace program to scan an I2C bus for devices. It outputs a table with the list of detected devices on the specified bus. i2cbus indicates the number or name of the I2C bus to be scanned, and should correspond to one of the busses listed by i2cdetect -l. The optional parameters first and last restrict the scanning range (default: from 0x03 to 0x77). | <code>i2cdetect</code> is a userspace program to scan an I2C bus for devices. It outputs a table with the list of detected devices on the specified bus. <code>i2cbus</code> indicates the number or name of the I2C bus to be scanned, and should correspond to one of the busses listed by <code>i2cdetect -l</code>. The optional parameters first and last restrict the scanning range (default: from 0x03 to 0x77). | ||
<syntaxhighlight lang="shell"> | |||
tom@raspberrypi:~ $ sudo i2cdetect -l | |||
i2c-1 i2c bcm2835 (i2c@7e804000) I2C adapter | |||
i2c-11 i2c bcm2835 (i2c@7e205000) I2C adapter | |||
i2c-0 i2c i2c-11-mux (chan_id 0) I2C adapter | |||
i2c-10 i2c i2c-11-mux (chan_id 1) I2C adapter | |||
</syntaxhighlight> | |||
<syntaxhighlight lang="shell"> | <syntaxhighlight lang="shell"> | ||
tom@raspberrypi:~ $ sudo i2cdetect -y 0 | tom@raspberrypi:~ $ sudo i2cdetect -y 0 | ||
Versiunea de la data 23 iulie 2020 17:25
I2C Probing
tom@raspberrypi:~ $ sudo i2cdetect -F 0
Functionalities implemented by /dev/i2c-0:
I2C yes
SMBus Quick Command yes
SMBus Send Byte yes
SMBus Receive Byte yes
SMBus Write Byte yes
SMBus Read Byte yes
SMBus Write Word yes
SMBus Read Word yes
SMBus Process Call yes
SMBus Block Write yes
SMBus Block Read no
SMBus Block Process Call no
SMBus PEC yes
I2C Block Write yes
I2C Block Read yes
i2cdetect is a userspace program to scan an I2C bus for devices. It outputs a table with the list of detected devices on the specified bus. i2cbus indicates the number or name of the I2C bus to be scanned, and should correspond to one of the busses listed by i2cdetect -l. The optional parameters first and last restrict the scanning range (default: from 0x03 to 0x77).
tom@raspberrypi:~ $ sudo i2cdetect -l
i2c-1 i2c bcm2835 (i2c@7e804000) I2C adapter
i2c-11 i2c bcm2835 (i2c@7e205000) I2C adapter
i2c-0 i2c i2c-11-mux (chan_id 0) I2C adapter
i2c-10 i2c i2c-11-mux (chan_id 1) I2C adapter
tom@raspberrypi:~ $ sudo i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
Link-uri externe
Specificații
Utile
- Device Trees, overlays, and parameters
- Hackaday Raspberry Pi Hat ID EEPROM Details
- Raspberry Pi SPI and I2C Tutorial