On Friday 29 February 2008 04:24, Sean Chiang wrote: > HI! list, > > Here's my recent observation about the power management of GSM modem > within gta01, > just a note. If we want to power off GSM modem _completely_ we need to > issue [EMAIL PROTECTED] > to modem and subsequently echo "0" > power_on. > > Without [EMAIL PROTECTED], even shutdown the gta01 the battery life still be > consumed by GSM modem. > My misunderstanding is the GSM modem could be power on/down only one > time, after you power > off GSM modem, you couldn't power on modem anymore. And I'm wrong, the > modem could be > powered on|off by echo "1"|"0" > power_on repeatedly. > > A wrapper called gsm-pm which is called by init when device on, is used > to control the on/off GSM modem. gsm-pm will > power on modem then run gsmd. After that, gsm-pm will wait until gsmd is > killed. When gsm-pm detect the gsmd > was killed it will send "[EMAIL PROTECTED]" to modem then echo "0" to > power_on. > > With this we doesn't need to worry the gsmd is dead or not. I tried to > write the gsm-pm, could be download from > http://svn.openmoko.org/developers/sean_chiang/gsm-pm/ I still have > problem when write [EMAIL PROTECTED] to modem. > > Is this idea ok? > > -Sean Chiang
I don't mean to criticize but shouldn't we be using snprintf and not sprintf ? Andy