For prototyping, I been loading the firmware OTA but in production this will be a problem. In my current design, I am using the jtag pins for five buttons (D3-D7 on the P1 module) also expose jtag pin on pads. I also expose the USB pads but I am using the TX pin as a pwm so no serial. Hope I can do without the TX pin for production.
Could the jtag pins function as GPIO and jtag for programming the firmware? Is there a guide to program the firmware using jtag?
I am trying to plan out how to take the current prototype to production testing to production. Any idea would be great.
Thank you for the help.