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> Software, The major holdup
Da_Blitz
post Mar 10 2007, 02:35 AM
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Well as some of you may have noticed there hasent been much work as off late.

this is mainly due to the software issue, ie what pcb tools will i use. well i had a look at the "pcb" program on sf.net and it seems it now includes an autorouter, i dont know how good it is but ill give it a try. its still lacking features i "want" but i belive at thius point in time that i could do the project with the software in its current state

so basically it looks like gEDA and pcb forthe pcb and scehmatic software, this is probbelly a better thing than what i wanted to use as most peopel who are want to take a look wouldnt need to buy expensive software, but those people probelly wouldnt mind the pictures smile.gif

i will give it a spin in the next couple of weeks, i have some free time coming up again so i think its time for the feature freze and some diagarms, at the least i will have the power supply up which should be "fault tollirent" unlike whatever they put in my Z sad.gif, it should also be able to exceed 0.5A on the usb socket, not recomeneded of course but those who need a bit of surge power to jump start a usb drive will apreciate this.

i will try and design it for 0.7A @ 5v normally and 2A surge (basically using caps for the surge, if you dont need this feature then drop the caps but considering how they are less than a cent anyway i dont see the point)

if i get a chance i will knock up some of the pelimanary usb to iMX3 stuff and some of the support circitry (ie clocks and passives) as these always need to be double checked (you always forget somthing). this is somthing that a non technical person can do, just look at the page numbers i provide as refrence and double check the wiring looks the same in thier examples asit is in the pics i provide, and check the svalues are the same except where stated.

i will have to look at a couple of IO things as well, did anyone want a rs232 level serial port (12v to -12v) or ttl (5v to 0v), is an SPI header somthing that people want (ie add user sensors) and do you want i2c, if so a dedicated connection (ie no devices on the bus) or a shared one (cheaper for me, you only have to be careful that when you add a device you dont use an exsisting device)

some other features others may not have cconsidered, besides the gyroscope/accereometer would you like features like a compus? or teamprature?, i was thinking that a temp sensor on the cpu and an ambient one would be nice, easy to do with I2C. perhaps one near the battery and power supply would be advisable as well.

well thoughts and input people, this week is out but next week the holidays begin (much to my relief)
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Da_Blitz
post Oct 6 2007, 05:12 AM
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Group: Members
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Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806



it sounds like your best off contacting me directtly

the qemu stuff sounds alright but writing saftware to emulate the hardware would be more work than neessacry, i would rather spend more cash on hardware and push out several prototypes

as for your needs, it almost looks like a subset of what i had in mind wink.gif i had planned to attach a CF card off of the ATA interface but with the way that SD cards are going it might be even better for me to drop that and go SD for the root FS. ethier way it wouldnt be too hard to have both

just PM me and i will send you more details about how to contact me
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