Search found 43 matches

by Otatiaro
Thu Apr 12, 2012 4:22 am
Forum: SparkFun Product Questions
Topic: Fine pitch and BGA placement tool
Replies: 4
Views: 925

Re: Fine pitch and BGA placement tool

Back, Someone on another forum pointed me to this : http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=110824856834&ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 which is the same oven but far cheaper ! And I'm now considering their little CNC routers to convert one to pick and place ... Th...
by Otatiaro
Thu Apr 12, 2012 1:31 am
Forum: SparkFun Product Questions
Topic: Fine pitch and BGA placement tool
Replies: 4
Views: 925

Fine pitch and BGA placement tool

Hello, I used to assemble my prototypes myself, but it's getting more and more difficult ... Small components are not a problem, I even did 0402, but switched back to 0603 for convinence. No, the real problem is this QFP64 part (STM32F205) that is really difficult to put on the paste spot on. I'm al...
by Otatiaro
Wed Jul 13, 2011 7:11 am
Forum: Everything ARM and LPC
Topic: [STM32F205RG] Unable to run application in ST-Link
Replies: 4
Views: 2512

Re: [STM32F205RG] Unable to run application in ST-Link

Ok found the solution.

I was ending my main by a infinite loop of "wait for interrupt".
And it seems the JTAG is not an interrupt, si it cannot communicate with the MCU if it's waiting for an interrupt.

The trick to take control is to force the BOOT0 signal high during a full chip erase.

Thomas.
by Otatiaro
Wed Jul 13, 2011 4:25 am
Forum: Everything ARM and LPC
Topic: [STM32F205RG] Unable to run application in ST-Link
Replies: 4
Views: 2512

Re: [STM32F205RG] Unable to run application in ST-Link

Ok now it's getting weird ... I switched to TASKING (evaluation), for 2 days I was able to debug, no problem, dev was going well. And then yesterday it started to be twitchy. Today I start everything again : impossible to connect to MCU. The program is running (the LED is turning ON), but no JTAG co...
by Otatiaro
Sat Jul 09, 2011 5:34 am
Forum: Everything ARM and LPC
Topic: [STM32F205RG] Unable to run application in ST-Link
Replies: 4
Views: 2512

Re: [STM32F205RG] Unable to run application in ST-Link

I changed the MCU and after some tests, it now seems to work !

Do you think the Atollic debugger can have wreack the MCU ?

Thomas.
by Otatiaro
Sat Jul 09, 2011 4:37 am
Forum: Everything ARM and LPC
Topic: [STM32F205RG] Unable to run application in ST-Link
Replies: 4
Views: 2512

[STM32F205RG] Unable to run application in ST-Link

Hello, I have a big problem with my target :( I can connect to it through JTAG or SWD using the ST Link, I can download an Hex file (with verification ok), but when I go to the core panel and click "run", I have an error message "unable to run application". I can erase chip and verify blank, no prob...
by Otatiaro
Mon May 16, 2011 10:57 am
Forum: Everything ARM and LPC
Topic: STM32 and UART reverse polarity.
Replies: 3
Views: 3441

Re: STM32 and UART reverse polarity.

Hello,

The problem is I use sometime this pin for PWM input, sometime for UART RX.
And I have absolutely no room left even for an SOT-23 FET ;)

Regards,
Thomas.
by Otatiaro
Mon May 16, 2011 7:47 am
Forum: Everything ARM and LPC
Topic: STM32 and UART reverse polarity.
Replies: 3
Views: 3441

STM32 and UART reverse polarity.

Hello, I'm using a PIC MCU in a project and consider switching to a more powerful STM32F20X MCU. It seems the peripherals are more than sufficient for what I need, BUT ... I need an UART RX channel with reserved polarity. It is easy with the PIC as there is a bit to set for reversed polarity, but I ...
by Otatiaro
Fri Feb 11, 2011 12:30 am
Forum: Arduino
Topic: URGENT - Bar Owner Needs Help
Replies: 2
Views: 926

Re: URGENT - Bar Owner Needs Help

Hello,

It is of course possible, but would cost a few thousands of euros for development.

Regards,
Thomas.
http://www.murmureurs.fr
by Otatiaro
Wed Feb 02, 2011 12:49 pm
Forum: BatchPCB
Topic: Where to get a cheap nice working stencil?
Replies: 9
Views: 2530

Re: Where to get a cheap nice working stencil?

Hello,

Can you post some photos of your stencils ?

Regards,
Thomas.
by Otatiaro
Wed Feb 02, 2011 8:53 am
Forum: SparkFun Product Questions
Topic: IMU-3000 DMP specifications, any news ?
Replies: 3
Views: 1297

IMU-3000 DMP specifications, any news ?

Hello, I'd like to give a try at the Invensense IMU-3000 Digital Motion Processing, but except the presence of the RESERVED registers in the datasheet for DMP use, I can not find anywhere documentation about how to use them. Reading the MPL (Motion Processing Library) from Invensense, it seems quiet...
by Otatiaro
Mon Jan 17, 2011 6:50 am
Forum: BatchPCB
Topic: Where to get a cheap nice working stencil?
Replies: 9
Views: 2530

Re: Where to get a cheap nice working stencil?

Hello,

Never tried myself but http://www.smtstencil.co.uk seems to have very good prices for EU.

Regards,
Thomas.

[EDIT] I got mines from SPCI : http://www.spci-quickproto.com/
by Otatiaro
Wed Dec 29, 2010 10:28 am
Forum: SparkFun Site Questions/Comments
Topic: Double Sided PCB SMT Soldering
Replies: 10
Views: 11726

Re: Double Sided PCB SMT Soldering

Hello, I'm having the same problem. - I will have very high quality solder paste stencils for both side - The board is 4 layer of copper - The components are 0603 for resistors, LEDs and capacitors (one or two 0805) - There are few small pitch QFN / LGA packages (one QFN64, a smaller QFN and an LGA ...
by Otatiaro
Fri Dec 17, 2010 9:01 am
Forum: SparkFun Product Questions
Topic: Filtering gyroscope output, ONLY gyroscope.
Replies: 6
Views: 1287

Re: Filtering gyroscope output, ONLY gyroscope.

Hello, Thanks for the input. But ... I cannot find any suitable model for only 3 gyroscopes, do you have something in mind ? The fact is there is no relationship between the 3 angular rates (I can't see any) : having X and Y angular rates doesn't tell you anything about the Z angular rate, no ? Rega...
by Otatiaro
Fri Dec 17, 2010 8:20 am
Forum: SparkFun Product Questions
Topic: Filtering gyroscope output, ONLY gyroscope.
Replies: 6
Views: 1287

Re: Filtering gyroscope output, ONLY gyroscope.

Hi, I posted exactly the same topic at DIY Drones and someone, I think, gave me the answer ... http://www.diydrones.com/forum/topics/filtering-gyroscope-output?commentId=705844%3AComment%3A238127&xg_source=msg_com_forum I was expecting the kalman filter to reduce noise on the gyro signal ... but sin...