[Arm-netbook] EOMA68-jz4775 first usb-loader hello-world success

[Luke Kenneth Casson Leighton]

http://rhombus-tech.net/ingenic/jz4775/news/

yippeee! the jz4775 cpu card didn't blow up, instead it announced
itself on the usb bus, and i was able to modify a CI120 usbloader i
found, to upload a UART0-based "hello world" program. next phase
would be to initialise the DDR3 RAM, then compile and upload u-boot
into DDR3 RAM and execute it.

all very exciting

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[Paul Boddie]

Post by Luke Kenneth Casson Leighton
http://rhombus-tech.net/ingenic/jz4775/news/
yippeee! the jz4775 cpu card didn't blow up, instead it announced
itself on the usb bus, and i was able to modify a CI120 usbloader i
found, to upload a UART0-based "hello world" program. next phase
would be to initialise the DDR3 RAM, then compile and upload u-boot
into DDR3 RAM and execute it.
all very exciting

Very encouraging! The CI20 bare-metal stuff is rather educational and it helps
to explain various things that you can see in other code related to the
Ingenic SoCs.

It'll be interesting to see whether the jz4775 is close enough to the other
SoCs for various initialisation things to work straight away with limited
reconfiguration, perhaps even things like the framebuffer.

Paul

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[Luke Kenneth Casson Leighton]

Post by Paul Boddie

Post by Luke Kenneth Casson Leighton
http://rhombus-tech.net/ingenic/jz4775/news/
yippeee! the jz4775 cpu card didn't blow up, instead it announced
itself on the usb bus, and i was able to modify a CI120 usbloader i
found, to upload a UART0-based "hello world" program. next phase
would be to initialise the DDR3 RAM, then compile and upload u-boot
into DDR3 RAM and execute it.
all very exciting

Very encouraging! The CI20 bare-metal stuff is rather educational and it helps
to explain various things that you can see in other code related to the
Ingenic SoCs.

yeah, it's kinda cool. slightly scarily low-level and more like the
ST devkit, but very cool.

Post by Paul Boddie
It'll be interesting to see whether the jz4775 is close enough to the other
SoCs for various initialisation things to work straight away with limited
reconfiguration, perhaps even things like the framebuffer.

first hardware difference is that the clock i'm running the
eoma68-jz4775 board off of is 24mhz not 48.

i've managed to compile ingenic's jz4775 version of u-boot 1.1.6,
i'll be putting that onto an sd card tomorrow and changing the boot
selection to see if it recognises booting from MMC0. that will help
confirm a heck of a lot of bits of hardware.

l.

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