Nspire CX CAS boot2 & diag boot error

→ **MyCalcs** profile · by **spdjoco** » 02 May 2020, 18:50

I got a calculator by my friends, but not working.
I have a ttl stick and program answer this:

Code: Select all: Boot Loader Stage 1 (3.00.99) Build: 2010/9/9, 17:29:13 Copyright (c) 2006-2010 Texas Instruments Incorporated Using production keys Last boot progress: 65 Available system memory: 33196 Checking for NAND: NAND Flash ID: Generic 1 GBit (0xA1) SDRAM size: 64 MB SDRAM memory test: Pass Clearing SDRAM...Done. Clocks: CPU = 132MHz AHB = 66MHz APB = 33MHz Clearing SDRAM...Done. Clearing SDRAM...Done. Boot option: Normal Loading BOOT2 software... Error reading/validating BOOT2 image Error loading BOOT2, looking for pre-installed images. Checking for DIAGS image in pre-install area. No DIAGS image found. Checking for BOOT2 image in pre-install area. No BOOT2 image found. Error loading BOOT2, install new version. Checking battery level. Battery level is OK. Ready to download BOOT2 software... Begin XMODEM file transfer.

How to fix it?

Thank you very much

→ **MyCalcs** profile · by **critor** » 02 May 2020, 19:05

Hi. Apparently you've got no valid boot image, neither in the Boot2 partition, nor in the Diags partition.

You'll need to reflash a valid CX Boot2 image.
For example, download CX Boot2 4.4.0 : archives_voir.php?id=1362033

Then you'll need a serial software supporting Xmodem file transfers.
If your current one doesn't, for example on Windows there is ExtraPuTTY : http://www.extraputty.com/

The connection setup, if needed :

Baud rate : 115200
Data : 8 bit
Parity : none
Stop : 1 bit
Flow control : none

You need to connect both Rx and Tx pins :

Once everything is ok :

press reset button
once the "Begin XMODEM file transfer." prompt, send the downloaded Boot2 image, using the Xmodem protocol

→ **MyCalcs** profile · by **spdjoco** » 02 May 2020, 19:31

Thanks the fast answer, but i upload Boot2 file and nothing happened (no reboot). What the next step?

→ **MyCalcs** profile · by **critor** » 02 May 2020, 19:37

This isn't normal.

Anything printed after the "Begin XMODEM file transfer." line ?

→ **MyCalcs** profile · by **spdjoco** » 02 May 2020, 19:40

Code: Select all: Begin XMODEM file transfer. Download error: 255BOOT1 Error: Halting boot due to download error.

I called my friend who updated the device to the last software and he tried downgrade and now not working..

→ **MyCalcs** profile · by **critor** » 02 May 2020, 19:47

So, you got an error during the Boot2 image transfer.

Did it start ? I mean did you get a progress bar in the software with more than 0%, or did it stay and fail at 0% ?