I would like to use I2C on a LPS331AP sensor IC. I am struggling with I2C on the Vocore.
Can somebody perhaps post a simple recipe to setup I2C on the Vocore ? I am a beginner with OpenWrt and Linux.
My connections are: (not sure if this is correct)
BOARD VCC -> VoCore 3.3V
BOARD GND -> VoCore GND
BOARD SCL -> VoCore G#02/I2C_SCLK
BOARD SDA -> VoCore G#01/I2C_SD
I have a white Vocore v1.0 and Linux command uname -a reports:
Linux OpenWrt 3.10.49 #4 Tue Sep 15 22:04:56 EDT 2015 mips GNU/Linux
I2C Basic Setup
- Vonger
- Posts: 897
- Joined: Sun Oct 19, 2014 6:00 am
Re: I2C Basic Setup
I think you forget the pull up 4.7Kohm resistor for I2C CLK and I2C DAT.
- danie
- Posts: 5
- Joined: Thu Dec 03, 2015 4:32 am
Re: I2C Basic Setup
hey i got my i2c working ! here is the recipe:
1. load latest firmware ie 3.18.20 ; use web interface , it works well
2. enable internet for AP + STA ; use Vonger's recipe
3. opkg update
4. change passwd for good measures
5. copy i2c tools over from openwrt repository with pc (to pc hard disk)
6. Use WinSCP to copy these files to /root on vocore
7. opkg install <filenames> {to install the i2c packages)
8. check now i2c devices: ls /dev/i*
9.check the LPS331AP device: i2cdetect -r 0
10. load data from sensor: i2cdump -y 0 0x5d
there is it !! thanks to all those who helped me
ps the Pololu LPS331AP has pull-ups and everything. that was not the issue.
1. load latest firmware ie 3.18.20 ; use web interface , it works well
2. enable internet for AP + STA ; use Vonger's recipe
3. opkg update
4. change passwd for good measures
5. copy i2c tools over from openwrt repository with pc (to pc hard disk)
6. Use WinSCP to copy these files to /root on vocore
7. opkg install <filenames> {to install the i2c packages)
8. check now i2c devices: ls /dev/i*
9.check the LPS331AP device: i2cdetect -r 0
10. load data from sensor: i2cdump -y 0 0x5d
there is it !! thanks to all those who helped me
ps the Pololu LPS331AP has pull-ups and everything. that was not the issue.
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