BOOSTXL-RS232: F28379D

David,

Can you check the voltage on FORCEON and FORCEOFF to make sure both are high? Do you see the LED lights of CTS1 and RTS1 on? Lastly I might miss the information. I'm sure how you connect CTS2 and RTS2 to the MCU through J5/J6, J7/J8.  

Regards,

Hao

Hello Hao L,

I've checked and both FORCEON and FORCEOFF are high. LED lights of CTS1 and RTS1 are on.

I've connect CTS2 and RTS2 to the MCU through J5/J6 (GP8), J7/J8(GP5), but I'm working at low speed and I think there is not need to use them. If I won't use them, what should be the right configuration, I mean CTS2 high or low? And RTS2? Is there any BOOSTXL-RS232 standard example to work with?

Thanks in advance,

David.

David,

I think J5/J6 and J7/J8 make it easy to choose which GPIO (for example GP3, GP4, GP5 and GP8 of J1) to connect to MCU. You could bypass them by directly wiring CTS2 (J5) and/or RTS2 (J6) to the GPIO port. CTS2 and RTS2 are pull up by 10kOhm. You can leave them open if not used.

Please let me know if you have more questions.

Regards,

Hao

Hello Hao,

I can't put it working. I have remove RTS, CTS, FORCEON, !FORCEOFF and !INVALID jumpers as they are not needed for a 9600 bauds communication. GP3 is connected to RX2 and GP4 is connected to TX2.

Find attached 3 programs:

• 1 to run in the Launchpad F28379D with the BOOSTXL-RS232 connected to SCI-B. It is programmed to use both SCIA and SCIB.
• 2 to run in the PC.
  • The one connected to the Launchpad via USB-SCIA works fine.
  • The one connected to the Launchpad via USB-SCIB doesn’t work.

Any clue?f28379d_RS232.zip

David,

With the jumpers, does the communication work? Can you advice in which document it's recommended to remove the jumpers for 9600 bauds rate? By SCIA, do you mean the SCIC ports? Thanks,

www.ti.com/.../sprui73a.pdf

Hao

Hello Hao,

Answering your questions.

• With the jumpers, does the communication work?

LEDs (RX1, TX1, CTS1, RTS1) are working but communication doesn`t work. I get Status=1 at HOST that means that Timeout has happened.

• Can you advice in which document it's recommended to remove the jumpers for 9600 bauds rate?

I have never use CTS and RTS in serial communication for 9600 bauds and even if I loose some frame I don't care.

• By SCIA, do you mean the SCIC ports?

No, I mean SCIA which is connected to USB port of F28379D Launchpad. That one works and it is not using the BOOSTXL-RS232. But the program is the same and that's why I'm not understanding what else I have to do.

Can you run the programs that I supply in the previous message in a F28379D Launchpad board?

Thanks,

David,

I appreciate your information. It looks the issue is not about the BOOSTXL-RS232. I've asked the experts from C2000 help take a look at the case.

Regards,

Hao