Difference between revisions of "Literati:Serial Port"
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[[File:literati-w-1637287|frame|White model #1637287]] | [[File:literati-w-1637287|frame|White model #1637287]] | ||
+ | ==Location== | ||
+ | The Serial port on the White literati model #1637287 is located on the right side of the device seen in the picture on the right. | ||
+ | |||
+ | there are 4 pins top->down 5v?,TX,RX,GND. connecting these pins to a max232 level converter and then to a serial port on a computer allows you to view the bootloader start up processes and the starting of the linux kernel. | ||
+ | |||
+ | ==Boot== | ||
+ | during the boot process there is a 3 second count down to allow a user to enter the bootloader before booting the kernel. | ||
+ | |||
+ | ===Boot CMD's=== | ||
+ | <per> | ||
+ | boot zImage from sd that fat32 part | ||
+ | boot zImage from sd that fat32 part | ||
+ | boot zImage from sd that fat32 part | ||
+ | boot zImage from sd that fat32 part | ||
+ | ? - alias for 'help' | ||
+ | base - print or set address offset | ||
+ | bdinfo - print Board Info structure | ||
+ | bootm - boot application image from memory | ||
+ | branch - enable or disable branch prediction | ||
+ | TestMemory - start application at address 'addr' | ||
+ | cmp - memory compare | ||
+ | cp - memory copy | ||
+ | crc32 - checksum calculation | ||
+ | dcache - enable or disable data cache | ||
+ | dnw - initialize USB device and ready to receive for Windows server (specific) | ||
+ | echo - echo args to console | ||
+ | erase - erase FLASH memory | ||
+ | exit - exit script | ||
+ | flinfo - print FLASH memory information | ||
+ | go - start application at address 'addr' | ||
+ | help - print online help | ||
+ | icache - enable or disable instruction cache | ||
+ | imls - list all images found in flash | ||
+ | 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 | ||
+ | md - memory display | ||
+ | mm - memory modify (auto-incrementing) | ||
+ | movi - moviNAND sub-system | ||
+ | mtest - simple RAM test | ||
+ | mw - memory write (fill) | ||
+ | nand - NAND sub-system | ||
+ | nboot - boot from NAND device | ||
+ | nm - memory modify (constant address) | ||
+ | printenv- print environment variables | ||
+ | protect - enable or disable FLASH write protection | ||
+ | reset - Perform RESET of the CPU | ||
+ | saveenv - save environment variables to persistent storage | ||
+ | setenv - set environment variables | ||
+ | sleep - delay execution for some time | ||
+ | test - minimal test like /bin/sh | ||
+ | version - print monitor version | ||
+ | 1 update boot from sd | ||
+ | 2 update kernel from sd | ||
+ | 3 update resource from sd | ||
+ | 4 update all | ||
+ | </per> |
Revision as of 14:42, 22 February 2011
Location
The Serial port on the White literati model #1637287 is located on the right side of the device seen in the picture on the right.
there are 4 pins top->down 5v?,TX,RX,GND. connecting these pins to a max232 level converter and then to a serial port on a computer allows you to view the bootloader start up processes and the starting of the linux kernel.
Boot
during the boot process there is a 3 second count down to allow a user to enter the bootloader before booting the kernel.
Boot CMD's
<per> boot zImage from sd that fat32 part boot zImage from sd that fat32 part boot zImage from sd that fat32 part boot zImage from sd that fat32 part ? - alias for 'help' base - print or set address offset bdinfo - print Board Info structure bootm - boot application image from memory branch - enable or disable branch prediction TestMemory - start application at address 'addr' cmp - memory compare cp - memory copy crc32 - checksum calculation dcache - enable or disable data cache dnw - initialize USB device and ready to receive for Windows server (specific) echo - echo args to console erase - erase FLASH memory exit - exit script flinfo - print FLASH memory information go - start application at address 'addr' help - print online help icache - enable or disable instruction cache imls - list all images found in flash 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 md - memory display mm - memory modify (auto-incrementing) movi - moviNAND sub-system mtest - simple RAM test mw - memory write (fill) nand - NAND sub-system nboot - boot from NAND device nm - memory modify (constant address) printenv- print environment variables protect - enable or disable FLASH write protection reset - Perform RESET of the CPU saveenv - save environment variables to persistent storage setenv - set environment variables sleep - delay execution for some time test - minimal test like /bin/sh version - print monitor version 1 update boot from sd 2 update kernel from sd 3 update resource from sd 4 update all </per>