topic USB 4.0.3 CDC HOST doesn't receive data in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-4-0-3-CDC-HOST-doesn-t-receive-data/m-p/248597#M6837 <HTML><HEAD></HEAD><BODY><P>I modified the example from "...\Freescale USB Stack v4.0.3\Source\Host\examples\cdc_serial\cw10\kinetis_l2k" to use it with openSDA on FRDM-KL25Z.</P><P>I can send data from Host to CDC device but not from Device to HOST. It doesn't works. Host doesn't receive nothing.</P><P>Function&nbsp; _io_cdc_serial_read always return 0.</P><P>If I connect the device to a PC,&nbsp; I can see in the hyperterminal the data sent, so the problem seems to be on the host.</P><P></P><P></P><P>I need change any specific register initialization code?</P><P>This example works correctly in TWRMKL25z ?</P></BODY></HTML> Wed, 06 Feb 2013 07:50:50 GMT pedropol 2013-02-06T07:50:50Z USB 4.0.3 CDC HOST doesn't receive data https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-4-0-3-CDC-HOST-doesn-t-receive-data/m-p/248597#M6837 <HTML><HEAD></HEAD><BODY><P>I modified the example from "...\Freescale USB Stack v4.0.3\Source\Host\examples\cdc_serial\cw10\kinetis_l2k" to use it with openSDA on FRDM-KL25Z.</P><P>I can send data from Host to CDC device but not from Device to HOST. It doesn't works. Host doesn't receive nothing.</P><P>Function&nbsp; _io_cdc_serial_read always return 0.</P><P>If I connect the device to a PC,&nbsp; I can see in the hyperterminal the data sent, so the problem seems to be on the host.</P><P></P><P></P><P>I need change any specific register initialization code?</P><P>This example works correctly in TWRMKL25z ?</P></BODY></HTML> Wed, 06 Feb 2013 07:50:50 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-4-0-3-CDC-HOST-doesn-t-receive-data/m-p/248597#M6837 pedropol 2013-02-06T07:50:50Z Re: USB 4.0.3 CDC HOST doesn't receive data https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-4-0-3-CDC-HOST-doesn-t-receive-data/m-p/248598#M6838 <HTML><HEAD></HEAD><BODY><P>In the <STRONG>usb_class_cdc_set_acm_ctrl_state()</STRONG> function, at lines<STRONG> 350 / 351</STRONG> if_acm_ptr-&gt;ctrl_state.bmStates[<STRONG>1</STRONG>] should be changed with if_acm_ptr-&gt;ctrl_state.bmStates[<STRONG>0</STRONG>]. The problem was that the state was sent on the usb in big endian instead of little endian.</P></BODY></HTML> Sun, 10 Feb 2013 22:23:46 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-4-0-3-CDC-HOST-doesn-t-receive-data/m-p/248598#M6838 florintoma 2013-02-10T22:23:46Z