[Tuto] [EN/FR] Install nLoader / TI-Nspire CX

[tiagouwu]

i did all but after the steep F9, my calculator do not turn on again help, a think i saw on the step F6 nLdr was first and boot 1.5.4.40.8 second.

[TBUC]

I am stuck on the part where I flash diag/boot2. When click 2 to flash and enter to reflash I get the following message: "Source image exceeds area and has been rejected. Choose higher dest location."

[critor]

Hello.

Is it possible to have a picture of the BtMg home screen ?
You can host it on https://imgur.com/ for example, and then post the address here.

[TBUC]

I apologize for the long wait.

I have now since then changed my os to 4.4.0 thanks to your help from before. But I now face a similar issue. When I attempt to flash (with boot2) I get an error message as shown in the image. Tell me if I am missing any screenshots that would assist you in solving this issue.

I used this video as a reference of what I was trying to do. I am at about 13:40 or something like that in the video:
https://www.youtube.com/watch?v=fny7pg1OdcM

I thank you for helping me.

[foxium]

I tried downgrading a NON-CAS CX hw rev AE from OS 4.5.5 by building nLoader from source, as per its README. The build script produced a couple integer conversion/casting errors, which could be suppressed using CFLAGS:

Code: Tout sélectionner

=================================
Making nMaker image for NONCAS_OS
=================================
rm -f *.o *.elf
rm -f ../ndless_loader.bin
arm-none-eabi-gcc -O3 -Wall -Werror -Wextra -Wconversion -marm -mcpu=arm926ej-s -nodefaultlibs -nostartfiles -s -ffreestanding -std=gnu11 -fomit-frame-pointer -Wno-implicit-fallthrough -o ndless_loader.o -c ndless_loader.c
arm-none-eabi-ld -e ndlessLoader -T ldscript -flto ndless_loader.o -o ndless_loader.elf
arm-none-eabi-objcopy -O binary ndless_loader.elf ../ndless_loader.bin
rm -f *.o *.elf
rm -f loader.bin loader.elf  imageloader.o  inject_ndless_loader.o  main.o  patchboot2.o  screen.o  utils.o  memcpy.o
arm-none-eabi-gcc -c imageloader.c -o imageloader.o -DNONCAS_OS -Wall -Werror -Wextra -Wconversion -O3 -marm -mcpu=arm926ej-s -nolibc -nostartfiles -fno-exceptions -lgcc -s -ffreestanding -std=gnu11 -fomit-frame-pointer
imageloader.c: In function 'gethalfword':
imageloader.c:35:17: error: conversion from 'int' to 'uint16_t' {aka 'short unsigned int'} may change value [-Werror=conversion]
   35 |  return hi << 8 | getbyte(p);
      |         ~~~~~~~~^~~~~~~~~~~~
imageloader.c: In function 'getword':
imageloader.c:40:18: error: conversion to 'uint32_t' {aka 'long unsigned int'} from 'int' may change the sign of the result [-Werror=sign-conversion]
   40 |  return hi << 16 | gethalfword(p);
      |         ~~~~~~~~~^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make: *** [_Makefile:14: imageloader.o] Error 1


However, the resulting nLoader boot image (flashed using TTL) freezes on the loading screen at 2%. The boot screen shows up but the progress bar does not proceed even after waiting for 10 minutes.

Code: Tout sélectionner

Boot Loader Stage 1 (4.0.1.43)
Build: 2015/7/20, 14:47:25
Copyright (c) 2006-2015 Texas Instruments Incorporated
Using production keys

Last boot progress: 1535

Available system memory: 28072
Checking for NAND: NAND Flash ID: Generic 1 GBit (0xA1)
SDRAM size: 64 MB
SDRAM memory test:   Pass
Clearing SDRAM...Done.
Clocks:  CPU = 156MHz   AHB = 78MHz   APB = 39MHz
Clearing SDRAM...Done.
Boot option: Normal

Loading from BOOT2 partition...

100%

BOOT1: loading complete (120 ticks), launching <BOOT1.5> image.



Boot Loader Stage 1.5 (4.4.0.8)
Build: 2016/8/10, 16:15:40
Copyright (c) 2006-2016 Texas Instruments Incorporated
Using production keys

Clocks:  CPU = 156MHz   AHB = 78MHz   APB = 39MHz
Checking for NAND: NAND Flash ID: Generic 1 GBit (0xA1)


Initializing graphics subsystem.

Loading from Boot 2 partition...

2%


Any ideas why this is happening?

[JustDaveSL]

I have successfully downgraded my OS. Whenever I reset I have to press esc+Menu+minus or else it wont boot and shows a red X on the boot screen. How do I make that go away?

[foxium]

Code: Tout sélectionner

Loading from Boot 2 partition...

2%


Any ideas why this is happening?

I was able to eliminate the compiler errors by using specifically the "arm-gnu-toolchain-12.2.rel1" to build nLoader. However the resulting bootloader image (after installing via serial) still gets stuck at 2% (NON-CAS) or 3% (CAS):

Code: Tout sélectionner

Loading from BOOT2 partition...

100%

BOOT1: loading complete (121 ticks), launching <BOOT1.5> image.



Boot Loader Stage 1.5 (4.4.0.8)
Build: 2016/8/10, 16:15:40
Copyright (c) 2006-2016 Texas Instruments Incorporated
Using production keys

Clocks:  CPU = 156MHz   AHB = 78MHz   APB = 39MHz   
Checking for NAND: NAND Flash ID: Generic 1 GBit (0xA1)


Initializing graphics subsystem.

Loading from Boot 2 partition...

3%0x02AFD250
  calculated 0x0018F09