• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 40 subscribers
  • Views 643 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC3200MODLAUNCHXL: Auto-reset Issue with External FTDI Chip using Energia

Kychen
Prodigy 90 points

Part Number: CC3200MODLAUNCHXL

Hi,

We are prototyping using the CC3200MODLAUNCHXL with an external FTDI chip FT231X.

Hardware connections include VCC, GND, TX, RX and DTR which is used to control the nRESET pin of CC3200MOD. For auto-reset, we connected the DTR pin of FT231X to nRESET pin of CC3200MOD via a 0.1uF capacitor. A 100k ohm pull-up resistor at the nRESET pin is already included in the CC3200MODLAUNCHXL schematic. SOP2 is pulled high to ensure the board is always in programming mode.

With our current setup, we are able to upload the code to the board using Energia IDE only under certain conditions. We discovered that it would only auto-reset when we upload the code right after the board is powered on, or we press and release the reset button before we click Upload. When we try uploading the code again right after a success upload, without pressing the reset button beforehand, the program would fail and get an error saying "Failed to trigger bootloader".

We want CC3200MOD to be able to auto-reset all the time when uploading a program, but it seems like our current setup is not fully automatic.

Does anyone know what the problem might be?

Thanks!