Découverte entrée série TI-Nspire Navigator + console U-Boot

→ **MyCalcs** profile · by **critor** » 15 Jan 2018, 21:01

Bricoleurs du dimanche, bonjour. Le point d'accès TI-Nspire Navigator Access Point permettant la création de réseaux de calculatrices TI-Nspire sans fil en classe, dispose d'une connectivité très riche sur sa carte mère comme nous l'avions déjà vu :

J1 : port micro-USB
J2 : emplacement pour connecteur 2x7=14 broches
J3 : emplacement pour connecteur 5 broches
J4 : emplacement pour lecteur de carte mémoire MMC/SD
J5 : emplacement pour port USB additionnel

Il est aisé de rajouter les connecteurs manquants, avec des réglettes de broches au pas de 2,54mm pour J2 ou 2,00mm pour J3.

Nous avions déjà vu que le connecteur J2 offrait un JTAG au format TI, et le connecteur J3 une sortie série Tx permettant de récupérer tout le log de démarrage à 115200 bauds.

Le log nous apprenait que le point d'accès démarrait sur X-Loader puis U-Boot, ce dernier invitant même pendant une seconde à appuyer sur une touche pour suspendre le démarrage :

Code: Select all: Texas Instruments X-Loader 1.4.4ss (Oct 18 2011 - 17:48:56) SDRAM Size = 64 MB TI USB AP - Rev 1.0 I2C read: I/O error I2C read: I/O error Loading u-boot.bin from nand U-Boot 2010.03-dirty (Oct 18 2011 - 17:47:59) - tiusbap OMAP36XX/37XX-GP ES2.1, CPU-OPP2, L3-165MHz, TIUSBAP + LPDDR/NAND DRAM: 64 MB NAND: 128 MiB *** Warning - bad CRC or NAND, using default environment In: serial Out: serial Err: serial Die ID #37e600029e380000016b1ef10c020019 Hit any key to stop autoboot: 0 No MMC card found Booting from nand ...

Pas de touche sur le point d'accès, mais comme cette information était transmise sur la sortie série, cela signifiait plutôt à notre avis de transmettre n'importe quel caractère sur l'entrée série.

Et bien bingo car nous venons justement découvrir la broche d'entrée série Rx sur le même connecteur J3, et rebingo car y envoyer un caractère au bon moment permet bien d'accéder à la console U-Boot. Voici quelques commandes permettant d'apprendre diverses choses complémentaires sur le matériel :

Code: Select all: X-Loader 1.4.4ss (Oct 18 2011 - 17:48:56) SDRAM Size = 64 MB TI USB AP - Rev 1.0 I2C read: I/O error I2C read: I/O error Loading u-boot.bin from nand U-Boot 2010.03-dirty (Oct 18 2011 - 17:47:59) - tiusbap OMAP36XX/37XX-GP ES2.1, CPU-OPP2, L3-165MHz, TIUSBAP + LPDDR/NAND DRAM: 64 MB NAND: 128 MiB *** Warning - bad CRC or NAND, using default environment In: serial Out: serial Err: serial Die ID #5b7800029e380000016b1ef10c027024 Hit any key to stop autoboot: 0 OMAP3 tiusbap # ? ? - alias for 'help' base - print or set address offset bdinfo - print Board Info structure boot - boot default, i.e., run 'bootcmd' bootd - boot default, i.e., run 'bootcmd' bootm - boot application image from memory chpart - change active partition cmp - memory compare coninfo - print console devices and information cp - memory copy crc32 - checksum calculation echo - echo args to console editenv - edit environment variable exit - exit script ext2load- load binary file from a Ext2 filesystem ext2ls - list files in a directory (default /) false - do nothing, unsuccessfully fatinfo - print information about filesystem fatload - load binary file from a dos filesystem fatls - list files in a directory (default /) fsinfo - print information about filesystems fsload - load binary file from a filesystem image go - start application at address 'addr' help - print command description/usage imxtract- extract a part of a multi-image itest - return true/false on integer compare loadb - load binary file over serial line (kermit mode) loads - load S-Record file over serial line loady - load binary file over serial line (ymodem mode) loop - infinite loop on address range ls - list files in a directory (default /) md - memory display mm - memory modify (auto-incrementing address) mmc - MMC sub-system mtdparts- define flash/nand partitions mtest - simple RAM read/write test mw - memory write (fill) nand - NAND sub-system nandecc - switch OMAP3 NAND ECC calculation algorithm nboot - boot from NAND device nm - memory modify (constant address) printenv- print environment variables reset - Perform RESET of the CPU run - run commands in an environment variable saveenv - save environment variables to persistent storage setenv - set environment variables showvar - print local hushshell variables sleep - delay execution for some time source - run script from memory test - minimal test like /bin/sh true - do nothing, successfully usleep - delay execution for some time version - print monitor version OMAP3 tiusbap # base Base Address: 0x00000000 OMAP3 tiusbap # bdinfo arch_number = 0x0000060A env_t = 0x00000000 boot_params = 0x80000100 DRAM bank = 0x00000000 -> start = 0x80000000 -> size = 0x04000000 DRAM bank = 0x00000001 -> start = 0x00000000 -> size = 0x00000000 baudrate = 115200 bps OMAP3 tiusbap # coninfo List of available devices: serial 80000003 SIO stdin stdout stderr OMAP3 tiusbap # fsinfo ### filesystem type is JFFS2 Scanning JFFS2 FS: read_nand_cached: error reading nand off 0x0 size 8192 bytes read_nand_cached: error reading nand off 0x2000 size 8192 bytes read_nand_cached: error reading nand off 0x4000 size 8192 bytes read_nand_cached: error reading nand off 0x6000 size 8192 bytes read_nand_cached: error reading nand off 0x8000 size 8192 bytes read_nand_cached: error reading nand off 0xa000 size 8192 bytes read_nand_cached: error reading nand off 0xc000 size 8192 bytes read_nand_cached: error reading nand off 0xe000 size 8192 bytes read_nand_cached: error reading nand off 0x10000 size 8192 bytes read_nand_cached: error reading nand off 0x12000 size 8192 bytes read_nand_cached: error reading nand off 0x14000 size 8192 bytes read_nand_cached: error reading nand off 0x16000 size 8192 bytes read_nand_cached: error reading nand off 0x18000 size 8192 bytes read_nand_cached: error reading nand off 0x1a000 size 8192 bytes read_nand_cached: error reading nand off 0x1c000 size 8192 bytes read_nand_cached: error reading nand off 0x1e000 size 8192 bytes read_nand_cached: error reading nand off 0x20000 size 8192 bytes read_nand_cached: error reading nand off 0x22000 size 8192 bytes read_nand_cached: error reading nand off 0x24000 size 8192 bytes read_nand_cached: error reading nand off 0x26000 size 8192 bytes read_nand_cached: error reading nand off 0x28000 size 8192 bytes read_nand_cached: error reading nand off 0x2a000 size 8192 bytes read_nand_cached: error reading nand off 0x2c000 size 8192 bytes read_nand_cached: error reading nand off 0x2e000 size 8192 bytes read_nand_cached: error reading nand off 0x30000 size 8192 bytes read_nand_cached: error reading nand off 0x32000 size 8192 bytes read_nand_cached: error reading nand off 0x34000 size 8192 bytes read_nand_cached: error reading nand off 0x36000 size 8192 bytes read_nand_cached: error reading nand off 0x38000 size 8192 bytes read_nand_cached: error reading nand off 0x3a000 size 8192 bytes read_nand_cached: error reading nand off 0x3c000 size 8192 bytes read_nand_cached: error reading nand off 0x3e000 size 8192 bytes read_nand_cached: error reading nand off 0x40000 size 8192 bytes read_nand_cached: error reading nand off 0x42000 size 8192 bytes read_nand_cached: error reading nand off 0x44000 size 8192 bytes read_nand_cached: error reading nand off 0x46000 size 8192 bytes read_nand_cached: error reading nand off 0x48000 size 8192 bytes read_nand_cached: error reading nand off 0x4a000 size 8192 bytes read_nand_cached: error reading nand off 0x4c000 size 8192 bytes read_nand_cached: error reading nand off 0x4e000 size 8192 bytes read_nand_cached: error reading nand off 0x50000 size 8192 bytes read_nand_cached: error reading nand off 0x52000 size 8192 bytes read_nand_cached: error reading nand off 0x54000 size 8192 bytes read_nand_cached: error reading nand off 0x56000 size 8192 bytes read_nand_cached: error reading nand off 0x58000 size 8192 bytes read_nand_cached: error reading nand off 0x5a000 size 8192 bytes read_nand_cached: error reading nand off 0x5c000 size 8192 bytes read_nand_cached: error reading nand off 0x5e000 size 8192 bytes read_nand_cached: error reading nand off 0x60000 size 8192 bytes read_nand_cached: error reading nand off 0x62000 size 8192 bytes read_nand_cached: error reading nand off 0x64000 size 8192 bytes read_nand_cached: error reading nand off 0x66000 size 8192 bytes read_nand_cached: error reading nand off 0x68000 size 8192 bytes read_nand_cached: error reading nand off 0x6a000 size 8192 bytes read_nand_cached: error reading nand off 0x6c000 size 8192 bytes read_nand_cached: error reading nand off 0x6e000 size 8192 bytes read_nand_cached: error reading nand off 0x70000 size 8192 bytes read_nand_cached: error reading nand off 0x72000 size 8192 bytes read_nand_cached: error reading nand off 0x74000 size 8192 bytes read_nand_cached: error reading nand off 0x76000 size 8192 bytes read_nand_cached: error reading nand off 0x78000 size 8192 bytes read_nand_cached: error reading nand off 0x7a000 size 8192 bytes read_nand_cached: error reading nand off 0x7c000 size 8192 bytes read_nand_cached: error reading nand off 0x7e000 size 8192 bytes done. Compression: NONE frag count: 0 compressed sum: 0 uncompressed sum: 0 Compression: ZERO frag count: 0 compressed sum: 0 uncompressed sum: 0 Compression: RTIME frag count: 0 compressed sum: 0 uncompressed sum: 0 Compression: RUBINMIPS frag count: 0 compressed sum: 0 uncompressed sum: 0 Compression: COPY frag count: 0 compressed sum: 0 uncompressed sum: 0 Compression: DYNRUBIN frag count: 0 compressed sum: 0 uncompressed sum: 0 Compression: ZLIB frag count: 0 compressed sum: 0 uncompressed sum: 0 OMAP3 tiusbap # ls Scanning JFFS2 FS: read_nand_cached: error reading nand off 0x0 size 8192 bytes read_nand_cached: error reading nand off 0x2000 size 8192 bytes read_nand_cached: error reading nand off 0x4000 size 8192 bytes read_nand_cached: error reading nand off 0x6000 size 8192 bytes read_nand_cached: error reading nand off 0x8000 size 8192 bytes read_nand_cached: error reading nand off 0xa000 size 8192 bytes read_nand_cached: error reading nand off 0xc000 size 8192 bytes read_nand_cached: error reading nand off 0xe000 size 8192 bytes read_nand_cached: error reading nand off 0x10000 size 8192 bytes read_nand_cached: error reading nand off 0x12000 size 8192 bytes read_nand_cached: error reading nand off 0x14000 size 8192 bytes read_nand_cached: error reading nand off 0x16000 size 8192 bytes read_nand_cached: error reading nand off 0x18000 size 8192 bytes read_nand_cached: error reading nand off 0x1a000 size 8192 bytes read_nand_cached: error reading nand off 0x1c000 size 8192 bytes read_nand_cached: error reading nand off 0x1e000 size 8192 bytes read_nand_cached: error reading nand off 0x20000 size 8192 bytes read_nand_cached: error reading nand off 0x22000 size 8192 bytes read_nand_cached: error reading nand off 0x24000 size 8192 bytes read_nand_cached: error reading nand off 0x26000 size 8192 bytes read_nand_cached: error reading nand off 0x28000 size 8192 bytes read_nand_cached: error reading nand off 0x2a000 size 8192 bytes read_nand_cached: error reading nand off 0x2c000 size 8192 bytes read_nand_cached: error reading nand off 0x2e000 size 8192 bytes read_nand_cached: error reading nand off 0x30000 size 8192 bytes read_nand_cached: error reading nand off 0x32000 size 8192 bytes read_nand_cached: error reading nand off 0x34000 size 8192 bytes read_nand_cached: error reading nand off 0x36000 size 8192 bytes read_nand_cached: error reading nand off 0x38000 size 8192 bytes read_nand_cached: error reading nand off 0x3a000 size 8192 bytes read_nand_cached: error reading nand off 0x3c000 size 8192 bytes read_nand_cached: error reading nand off 0x3e000 size 8192 bytes read_nand_cached: error reading nand off 0x40000 size 8192 bytes read_nand_cached: error reading nand off 0x42000 size 8192 bytes read_nand_cached: error reading nand off 0x44000 size 8192 bytes read_nand_cached: error reading nand off 0x46000 size 8192 bytes read_nand_cached: error reading nand off 0x48000 size 8192 bytes read_nand_cached: error reading nand off 0x4a000 size 8192 bytes read_nand_cached: error reading nand off 0x4c000 size 8192 bytes read_nand_cached: error reading nand off 0x4e000 size 8192 bytes read_nand_cached: error reading nand off 0x50000 size 8192 bytes read_nand_cached: error reading nand off 0x52000 size 8192 bytes read_nand_cached: error reading nand off 0x54000 size 8192 bytes read_nand_cached: error reading nand off 0x56000 size 8192 bytes read_nand_cached: error reading nand off 0x58000 size 8192 bytes read_nand_cached: error reading nand off 0x5a000 size 8192 bytes read_nand_cached: error reading nand off 0x5c000 size 8192 bytes read_nand_cached: error reading nand off 0x5e000 size 8192 bytes read_nand_cached: error reading nand off 0x60000 size 8192 bytes read_nand_cached: error reading nand off 0x62000 size 8192 bytes read_nand_cached: error reading nand off 0x64000 size 8192 bytes read_nand_cached: error reading nand off 0x66000 size 8192 bytes read_nand_cached: error reading nand off 0x68000 size 8192 bytes read_nand_cached: error reading nand off 0x6a000 size 8192 bytes read_nand_cached: error reading nand off 0x6c000 size 8192 bytes read_nand_cached: error reading nand off 0x6e000 size 8192 bytes read_nand_cached: error reading nand off 0x70000 size 8192 bytes read_nand_cached: error reading nand off 0x72000 size 8192 bytes read_nand_cached: error reading nand off 0x74000 size 8192 bytes read_nand_cached: error reading nand off 0x76000 size 8192 bytes read_nand_cached: error reading nand off 0x78000 size 8192 bytes read_nand_cached: error reading nand off 0x7a000 size 8192 bytes read_nand_cached: error reading nand off 0x7c000 size 8192 bytes read_nand_cached: error reading nand off 0x7e000 size 8192 bytes done. OMAP3 tiusbap # mtest Pattern 00000000 Writing... Reading... OMAP3 tiusbap # nand device Device 0: nand0, sector size 128 KiB OMAP3 tiusbap # printenv bootcmd=if mmc init ${mmcdev}; then if run loadbootscript; then run bootscript; else if run loaduimage; then run mmcboot; else run nandboot; fi; fi; else run nandboot; fi bootdelay=1 baudrate=115200 loadaddr=0x82000000 usbtty=cdc_acm console=ttyO2,115200n8 mpurate=600 buddy=none flash_MLO=mmc init; fatload mmc 1 0x80200000 MLO; nandecc hw; nand erase 0 80000; nand write.i 0x80200000 0 80000 flash_uBoot=mmc init; fatload mmc 1 0x80200000 u-boot.bin; nandecc sw; nand erase 80000 160000; nand write.i 0x80200000 80000 160000 flash_uImage=mmc init; fatload mmc 1 0x80200000 uImage; nandecc sw; nand erase 280000 600000; nand write.i 0x80200000 280000 600000 flash_uImage2=mmc init; fatload mmc 1 0x80200000 uImage2; nandecc sw; nand erase 880000 600000; nand write.i 0x80200000 880000 600000 flash_all=run flash_MLO;run flash_uBoot;run flash_uImage;run flash_uImage2 nuke_nand=nand erase 0 8000000 mmcdev=1 mtdparts=mtdparts=nand:512k(x-loader),1920k(u-boot),128k(u-boot-env),6m(kernel),6m(kernel2),4m(localconf),-(unused) mmcargs=setenv bootargs console=${console} ${mtdparts} nandargs=setenv bootargs console=${console} ${mtdparts} led_off=mw 49054090 40000000 led_on=mw 49054094 40000000 loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr bootscript=echo Running bootscript from mmc ...; source ${loadaddr} loaduimage=fatload mmc ${mmcdev} ${loadaddr} uImage mmcboot=echo Booting from mmc ...; run mmcargs; bootm ${loadaddr} nandboot=echo Booting from nand ...; run led_on; run nandargs; nand read ${loadaddr} 280000 600000; bootm ${loadaddr};run led_off;usleep 250000;run led_on; nand read ${loadaddr} 880000 600000; bootm ${loadaddr} stdin=serial stdout=serial stderr=serial dieid#=5b7800029e380000016b1ef10c027024 Environment size: 1728/131068 bytes OMAP3 tiusbap # showvar HUSH_VERSION=0.01 OMAP3 tiusbap # test OMAP3 tiusbap # version U-Boot 2010.03-dirty (Oct 18 2011 - 17:47:59) OMAP3 tiusbap # reset resetting ...