Temperature Sensor (Lm75Cim-3); Ddr3 Spd - SMART Embedded Computing COMX-P2020 BSP User Manual

U-boot Deployment
 Disconnect channel:
i2cswitch disconnect 0
i2cswitch show
Connected I2C Bus: 1
=> i2c probe
Valid chip addresses: 50 70
Excluded chip addresses: 29
Once the channel 0 has been disconnected from the I2C bus, then the all the I2C chips at
the testing bed (38, 54) will disappear from the I2C bus.
5.4.6

Temperature Sensor (LM75CIM-3)

The LM75 is a temperature sensor.
1. Chip Probe:
LM75's I2C address is 90h(8-bit). It can be accessed at I2C#2.
=> i2c dev 1
Setting bus to 1
=> i2c probe
Valid chip addresses: 1B 33 48 53 68
Excluded chip addresses:
2. Get current temperature:
The command: "sensor get" can be used to show current temperature:
=> i2c dev 1
Setting bus to 1
=> i2c probe
Valid chip addresses: 1B 33 48 53 68
Excluded chip addresses:
5.4.7

DDR3 SPD

1. Chip Probe:
The DDR3 SPD address is A6h(8-bit), and it can be accessed at I2C#2.
Chip Probe:
The DDR3 SPD address is A6h(8-bit), and it can be accessed at I2C#2.
2. Read SPD
The SPD information can be read out with the following commands:
58 COMX-P2020 BSP User Guide (6806800L84C)
U-boot Deployment