Search found 26 matches

by perryc
Tue Mar 21, 2017 12:58 pm
Forum: General Discussion
Topic: Can JTAG be remapped?
Replies: 6
Views: 3380

Re: Can JTAG be remapped?

Well this is not good news (but glad it was not a dumb question). I've got a uSD card in my design as well so what's the best practices plan here when you need a file system? I ironically I got motivated to figure out JTAG so I could debug my attempt to get SPIFFS working. I'm thinking the best I ca...
by perryc
Mon Mar 20, 2017 3:27 am
Forum: General Discussion
Topic: Can JTAG be remapped?
Replies: 6
Views: 3380

Can JTAG be remapped?

I see info in the tech_ref that suggests JTAG can be remapped with Direct I/O via IO_MUX. Section 4.4.2 is a bit thin but I'm not seeing alternate pads that can accept MT* functions.

Perry
by perryc
Sun Mar 19, 2017 4:34 pm
Forum: General Discussion
Topic: JTAG debugging guide for ESP32 with debugging example
Replies: 2
Views: 3162

Re: JTAG debugging guide for ESP32 with debugging example

Got a TIAO USB JTAG V2 board (http://www.diygadget.com/tiao-usb-multi-protocol-adapter-lite-jtag-spi-i2c-serial.html) running using the Espressif's JTAG Debugging doc under x86_64 Linux. Here's a few notes: Install the linux FTDI driver http://www.ftdichip.com/Drivers/D2XX.htm Do as described in Rea...
by perryc
Fri Feb 17, 2017 2:06 pm
Forum: General Discussion
Topic: Any way to disable bootloader from listening to UART1?
Replies: 4
Views: 2994

Re: Any way to disable bootloader from listening to UART1?

ack! well that's embarrassing..... I just copied my esp8266 pin mapping from last years board and didn't scan the table for new conflicts.

Thanks for the help.
Perry
by perryc
Fri Feb 17, 2017 4:41 am
Forum: General Discussion
Topic: Any way to disable bootloader from listening to UART1?
Replies: 4
Views: 2994

Re: Any way to disable bootloader from listening to UART1?

Hey I first gotta say your book has been a fantastic resource! GPS is on the default GPIO's 9&10 for UART1. Didn't have a breadboard for the GPS chip so didn't see this until I soldered up a pcb. Next rev I'll put the GPS on uart2 and for now I'll cut and solder traces unless there is some software ...
by perryc
Fri Feb 17, 2017 1:51 am
Forum: General Discussion
Topic: Any way to disable bootloader from listening to UART1?
Replies: 4
Views: 2994

Any way to disable bootloader from listening to UART1?

I've got a free running GPS on UART1 that if the darn thing gets a fix and starts sending data it corrupts flash downloads as it appears the data gets merges with the real data being sent on UART0 (MD5 match errors etc). Obvious solution is to move the GPS to UART2 or but wondering is there a way to...

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