USB serial driver(ftdi): there is error in receive data
Posted 03-27-2009 at 10:09 AM by plumnut
Quote:
Originally Posted by plumnut
when it is too short that time between two data sending form device to pc, the second data is lost.
I was using a wireless net card. the card connect to pc through USB. when it's connected, the usb is probed as two devices: one is ftdi,the other is cdc-acm.
I can use it to make one call. when I use it to make another call while hold the first call. the application cann't get the wright At respond.
it's like this (I cann't remeber the exact form):
AT+CLCC "10086"
AT+CLCC "1360000000" OK
the problem is I cann't receive :AT+CLCC "1360000000" OK.
but in the log from the card, it had sent it out.
I was using a wireless net card. the card connect to pc through USB. when it's connected, the usb is probed as two devices: one is ftdi,the other is cdc-acm.
I can use it to make one call. when I use it to make another call while hold the first call. the application cann't get the wright At respond.
it's like this (I cann't remeber the exact form):
AT+CLCC "10086"
AT+CLCC "1360000000" OK
the problem is I cann't receive :AT+CLCC "1360000000" OK.
but in the log from the card, it had sent it out.
This Problem has been fixed. when we use
read(fd,buf,size)
we get the two strings which is separated by NULL. In our
application, the following chars are discarded. So they missed the second string
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