CCS/TMS320F28379D: Serial Communication using the TI example usb_dev_serial_cpu

S.Tarik,

You should also include the GPIO 'Group' Mux structure in your code too, though in this case it does default to 0. Could you please try running your code for SCI-B using a different GPIO pin? I checked for SCITXDB and it is pinned out to other GPIO locations that are in common with the LaunchPad headers. Possible GPIO options (other than 18) are: 22, 14, 10, and 9. Please see the LaunchPad/TRM for other SCIRXDB GPIO19 options. Please let me know what happens. Thanks.

- Ken

Ken,

Thank you for taking into consideration my question,

The group is set by default to 0, It is not necessary, the default configuraiton should work since the GPAGMUX should be reset for SCI(TX/RX)DB

 GpioCtrlRegs.GPAGMUX2.bit.GPIO18  = 0;
 GpioCtrlRegs.GPAGMUX2.bit.GPIO19 = 0;

The same thing for GPIO19,

I also tried an other GPIO10/11, bellow the code i used ,

    EALLOW;
    GpioCtrlRegs.GPAGMUX1.bit.GPIO10 = 1;
    GpioCtrlRegs.GPAMUX1.bit.GPIO10 = 6; // 2 have been tasted also
    GpioCtrlRegs.GPAPUD.bit.GPIO10 = 0;
    GpioCtrlRegs.GPAQSEL1.bit.GPIO10 = 3;
    GpioCtrlRegs.GPADIR.bit.GPIO10 = 1;

    GpioCtrlRegs.GPAGMUX1.bit.GPIO11 = 1;
    GpioCtrlRegs.GPAGMUX1.bit.GPIO11 = 6; // I tried 2 also
    GpioCtrlRegs.GPAMUX1.bit.GPIO11 = 2;    //SCIRXDB
    GpioCtrlRegs.GPAPUD.bit.GPIO11 = 0;
    GpioCtrlRegs.GPADIR.bit.GPIO11 = 0;
    EDIS;

I still can't receive and send any character,

Regards,

S.Tarik,

S.Tarik,

Please see this related post that was just resolved:

e2e.ti.com/.../800604

Please double-check your header pins. Also, 6 is not a valid option for the MUX. The GPIO is set up with two levels of MUXs with each having four options (i.e. 0, 1, 2, and 3).

- Ken

Ken,

I thank you for your interest, I didn't forget your post, I was occupied with work issues,

I couldn't resolve my issue (usb_serial project) , I tried the TI example for serial communication interface, and I could connect my application.

The only issue i had is the corrupted data transfer, in your opinion, what is the  reason for the corruption data transfer please?

Thank you in advance,

Regards, 

S.Tarik,

S.Tarik,

The example project you are using (usb_dev_serial.c) is for creating a virtual serial port with the controlCARD when connected to the USB host system. With this project the USB cables from your PC are connected to both the mini and microUSB connectors on the controlCARD. Then characters typed in one terminal are echoed in the other and vice versa. Is this what you want to do? From you original post, it looks like you want to just communicate directly from your device to the F28379D SCI (i.e. using GPIO pins and not the USB). If so, then the SCI example would be a better starting point.

I hope this helps. If this answers your question, please click the green "Verified Answer" button. Thanks.

- Ken