search

chirimen-oh / any-issues

CHIRIMEN Open HardwareのISSUESを検討するために用意されています。 従って、issuesの議論の目的のみで利用されます。Messaging board (Forum) to discuss several CHIRIMEN issues.
3 stars 3 forks source link

Change default SCL clock frequency to 100 kbps (standard-mode) #84

Open MSakamaki opened 8 years ago

MSakamaki commented 8 years ago

From @dadaa on January 18, 2016 12:35

I tried to use a following sensor AM2320, but the sensor could not work. http://akizukidenshi.com/download/ds/aosong/AM2320.pdf Also I did i2cdetect command on CHIRIMEN, but it was not detected. According to the spec, this sensor supports up to 100khz SCL clock frequency. Other sensors that are working well support 400khz. So the reason may be the frequency.

standard-mode: up to 100 kbit/s. fast-mode: up to 400 kbit/s fast-mode plus: up to 1000 kbit/s HS-mode: up to 3.4 Mbit/s.

Copied from original issue: MozOpenHard/CHIRIMEN#48

MSakamaki commented 8 years ago

From @dynamis on January 25, 2016 12:13

To support more devices, default build should use standard-mode (rebuild karnel if you want to use fast mode)