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 by powool ¦  Wed Jan 30, 2008 5:49 pm ¦  Forum: AVR Microcontrollers ¦  Topic: Olimex AVR-PG1 painfully slow with avrdude ¦  Replies: 4 ¦  Views: 2268

I used a USB<->serial converter with the serial programmer and found it to be slow as well.

I replaced it with this: http://www.ladyada.net/make/usbtinyisp/index.html, which seems to be several orders of magnitude faster.

I use it to program my various olimex boards and am happy with it.

 by powool ¦  Mon Mar 12, 2007 10:17 am ¦  Forum: SparkFun Product Questions ¦  Topic: LED fading via PWM ¦  Replies: 58 ¦  Views: 12961

One issue with PWM using a polled loop is that if you happen to do any computation in addition, if the length of that computation varies, you can get 'speckling' - momentary bright or dark spots in the PWM cycling. I am using an MSP430 to PWM all the LED's on the Sparkfun 4x4 buttonpad, and was doin...

 by powool ¦  Mon Mar 05, 2007 9:25 am ¦  Forum: New Product Ideas ¦  Topic: CP2101 CP2102 CP210x Driver Download and Linux Details ¦  Replies: 9 ¦  Views: 22054

I decoded this source file once - I'll see if I can find the source I cobbled together. I got it to the point where I could reverse engineer it if needed, but gave up and bought an FTDI based USB interface. It gets a lot clearer after doing a bunch of simple cleanup - first remove extraneous newline...

MSP430F169 and MSP430F149 board connector

 by powool ¦  Thu Feb 08, 2007 11:44 am ¦  Forum: MSP Microcontrollers ¦  Topic: MSP430F169 and MSP430F149 board connector ¦  Replies: 0 ¦  Views: 1297

I've struggled trying to figure out a clean way to get a connector to the 60 pin header on these boards. I had been making 2x5 pin rectangular connectors where I had to solder the pins in, which was a pain. Regular IDC connectors have shoulders that are too wide to fit without bending adjacent pins....

 by powool ¦  Thu Aug 24, 2006 10:16 am ¦  Forum: New Product Ideas ¦  Topic: Oscilliscope ¦  Replies: 4 ¦  Views: 2149

I suspect everyone likes them... question is, what's the price?

 by powool ¦  Thu Aug 24, 2006 5:33 am ¦  Forum: New Product Ideas ¦  Topic: Oscilliscope ¦  Replies: 4 ¦  Views: 2149

It's pretty hard to beat eBay! Lots of good used scopes there.

 by powool ¦  Thu Mar 16, 2006 3:22 pm ¦  Forum: MSP Microcontrollers ¦  Topic: stand alone programming MSP430F423 with only 6 pins(or less) ¦  Replies: 1 ¦  Views: 1743

The BSL will work with 6 pins - gnd, vcc, tx, rx, and the two pins for reset and test.

Since I use only the BSL, I'm unable to compare it to the TI programmer.

 by powool ¦  Thu Mar 02, 2006 2:09 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Help with Blinky LEDs! ¦  Replies: 17 ¦  Views: 7823

If you're not sure the program is working, or that the processor is running, then simplify. Toggle a single bit off and on, slowly. Use a hard coded delay loop (make sure the compiler doesn't optimize it out). Or toggle it fast, and see if you get a half bright LED. Check your LED's again with a res...

 by powool ¦  Mon Feb 27, 2006 7:31 am ¦  Forum: SparkFun Product Questions ¦  Topic: help with cp2103 loopback! ¦  Replies: 22 ¦  Views: 11268

What is a good 3.3<->5V level shifter in a DIP?

 by powool ¦  Thu Feb 23, 2006 5:16 pm ¦  Forum: SparkFun Product Questions ¦  Topic: What's that called...? ¦  Replies: 10 ¦  Views: 4587

I did a couple of sets of rectangular headers for connecting to my MSP430F169 protoboard. There were 8 pin headers and I used pliers to crimp the individual pins. I'm pretty happy with the outcome. The problem is the time it takes to get it done neatly. If you can use the IDC connectors, that is esp...

 by powool ¦  Mon Feb 20, 2006 8:22 pm ¦  Forum: New Product Ideas ¦  Topic: Anyone want 10Mbps Ethernet on their next project? ¦  Replies: 9 ¦  Views: 4896

http://www.olimex.com/dev/enc28j60-h.html

sounds like they're on it!

Nice chip...

 by powool ¦  Mon Feb 20, 2006 9:32 am ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: web site suggestion - additional MSP430 part info ¦  Replies: 1 ¦  Views: 1697

A very useful tidbit for the header boards (at least the MSP430 boards I see) would be knowing what the pin spacing is, and what type of socket, if any, it is designed to fit into. http://www.sparkfun.com/commerce/product_info.php?products_id=43 is an example where I'm left guessing as to whether it...

web site suggestion - additional MSP430 part info

 by powool ¦  Mon Feb 20, 2006 9:06 am ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: web site suggestion - additional MSP430 part info ¦  Replies: 1 ¦  Views: 1697

For the MSP430 project boards, it would be handy to have a bullet point in each page that describes at least the flash ROM and RAM sizes, maybe other special features of note. The MSP430F1611 header board http://www.sparkfun.com/commerce/product_info.php?products_id=47 is an example where basic info...

 by powool ¦  Sun Feb 19, 2006 10:19 am ¦  Forum: New Product Ideas ¦  Topic: FTDI FT232RL USB <-> RS232 chips ¦  Replies: 5 ¦  Views: 14355

For what it is worth, I bought the FTDI 232C chip on a breakout board (from hobbyengineering.com) and found it to be very easy to work with. I was able to set it up with FreeBSD doing BSL downloads with a minimum of wiring and hassles. It makes a nice little laptop environment - you get the 5V off t...

 by powool ¦  Fri Feb 17, 2006 12:08 pm ¦  Forum: MSP Microcontrollers ¦  Topic: UART/Serial driver ¦  Replies: 2 ¦  Views: 2612

Google "bufferedUSART msp430", and you'll find it... it is freely available. It has an interrupt handling bug in it, but should work as a starting point. In the version of usart.c that I have, in the routine usart1Getch and usart0Getch - the interrupt case (ifdef block) needs to disable interrupts p...