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larsie

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Everything posted by larsie

  1. I ordered the same display from Aliexpress. Looked promising. I've tried the version of the library that's for the ST7735R (in the first post), but I'm only getting garbage on the screen. (On another display which claims to be ST7735R I've got RobG's library working perfectly)., Is A0 and DC the same? I'm assuming that. Lars
  2. There are some other peripherals on the external boards that draw a lot of power and some other reasons... so I can't leave the board on. I'll look for an i2c-driver with an enable bit I guess... Thanks for your suggestion.
  3. I've got a main board and then some external boards that all have msp430s in them. The main board communicates with i2c, using the hardware drivers. The main board can, using a regulator for each external board, turn off the power on each of the external boards. But when I turn off the power on the external board, the external MSP430 (which is powered down) pulls down the I2C-bus. Is there some way I can leave the turned-off msp430 so that it won't mess up the i2c-bus it's connected to? The external msp430s are MSP430G2553 and the main board is an F5528.
  4. That's pretty dramatic.
  5. Thanks. Will look at that post. But I don't have serial access from the radio-module. I have to run the radio module as a master, using SPI from the microcontroller itself.
  6. Thanks. Would the program that's uploaded have to be adjusted so that the addressing is right? I mean, the boot loader would be first, right? And then the program would follow (either as a bootloader with a program, or the 'dual-program' as suggested). Or would I compile the program with the boot-loader in front and the rest of the program after, so that the addressing is correct, and then just upload the relevant bits to the chip?
  7. I have a board with msp430g2553 and a cc1101 radio module. I would like to program the msp430 over-the-air. Is it possible? If so, what would be the easiest way to do it. I am on thin ice when it comes to boot loaders, flash, even memory addressing, so tell me slowly and with simple words The program is about 5k so less than half of the total flash size on the chips. Sent from my GT-I9505 using Tapatalk
  8. They seem to be out-of-stock of their mosfet breakout, and I'm not quite sure about that mosfet. Sparkfun have several options. On the regulator. Well, I guess you need a power-supply that provides 12V. That could be a computer supply. Probably you'll get it cheapest in a local store. and then you need a 3.6V or 5V regulator (latter being fed to the Launchpad which has a 3.6 regulator on it). Something like this: http://www.seeedstudio.com/depot/5v33v-breadboard-power-supply-p-566.html?cPath=1_4 ( though there are cheaper options).
  9. Yes, I was going to direct you to such a strip, but you could consider an RGB strip instead: http://dx.com/p/12v-54-led-rgb-light-strip-50cm-11304 (they have longer ones also at not much higher price). RGB is even cooler since you can change colour. If you want to drive just a simple LED, you can do it straight from the port of the MSP, as long as you put a 150 ohm resistor in series. But for these strips and anything bright, you need to have a driver circuit. The simplest driver circuit is a mosfet, but you have to make sure you can drive it with the 3.6V from the launchpad. You also
  10. I've started using the looking-headers footprint of the Sparkfun Eagle library. The holes are spaced so that a standard header locks in place. This is normally enough.
  11. If you just want a sound-level thing, only need a microphone board like this: https://www.sparkfun.com/products/9868 or http://www.seeedstudio.com/depot/grove-sound-sensor-p-752.html?cPath=25_27 Connect the microphone board to an analog input of the MSP430 and use for example Energia to read the sound level. Go in a loop and read the sound level, then use the digital output of your MSP430s. Set more LEDs if the sound level is high. Then connect an LED (and a series resistor to ground) to each digital output. If you have large LEDs and want lots of light, you need transistors or other driv
  12. Hi. I have this. I think it's ok. The timing is slightly off, but it generally works ok. I generally prefer their hotplate (I have that one too), because it gives me more control.
  13. I've made a BLE113 breakout-board with an MSP430G2553 on it and some buttons. This board isn't tested yet, but in case it's of interest, here are the eagle files. As you can see, it could be made a lot smaller. It is using this following Eagle component for the BLE113. apus_baby_ble_v1.zip
  14. Really nice work on the drivers. I seem to have gotten a display that won't reverse. In my design I have to reverse the direction, and the first batch of LCDs I bought worked fine with ste2007_issuecmd(STE2007_CMD_SEGMENTDIR, 1, STE2007_MASK_SEGMENTDIR); ste2007_issuecmd(STE2007_CMD_COMDIR, 8, STE2007_MASK_COMDIR); But then the second set of LCDs won't write left-to-right when upside down. It always writes left-to-right correct-way-up. Anybody know a work-around? Could it be I have a slightly different driver???
  15. I never replied to this one, it seems. I guess I can do now, almost exactly a year late :-) As far as I can remember, the SimpliciTI license was quite a free license, but only with permission to run on TI hardware. Not sure what it is now, but one has to make sure it's compatible with the other licenses you use. But I haven't looked at their licenses for a while, so it may have changed. Anaren used to have one which mandated you run on their modules, and the simple TI library was BSD (which is very free). Has anyone ported simpliciti to Energia? I'm in a hurry :-) since i have to go
  16. Here's a picture of part of the board. Hope the resolution is good enough. It has been hand-soldered. They say they handsolder up to a certain amount and then use pickn-place above that (can't remember how many). Some of the components on the board are slightly off (r_b2 for example in the picture), but when looking over the other boards after taking this picture, it doesn't seem that's a general problem. Most components look like C10.
  17. Thanks Rob. I tried Elecrow as you suggested. Really nice results. Boards came to about 10 USD per board, with components, dhl shipping etc, when making 10 boards. Quite a lot of small components, connectors etc, so I think it's a good price. They also soldered 0402 components very nicely.
  18. OK. It would be really useful if someone has some experience with other options for low-volume assembly services, PCBA suppliers etc.
  19. Hi. This might be the wrong place in the forum to put this question, but since many of us are using Seeed to make PCBs, I wonder if any of you have tried their new PCBA service, where they populate the prototype boards with common components. It unfortunately doesn't include MSP430 devices, Maybe if there was sufficient interest from the community, they would add some of the msp430 devices? I would suggest MSP430G2553 20 and 28 pin... This is the link to the service: http://www.seeedstudio.com/service/ I just spent 3 hours soldering on small components last night, so I think I'll try
  20. 4 pth plus ground as you suggest would be ideal. But I have had issues with port 1 for touch, so if you can spare 4 pins from port 2, I know that will work. Edit: the closer to the display the 5 pth are, the better, I think. Then the 5 pth can be on top of the touch board and not in the middle of the buttons. Not sure what is easy for you yo design in. Edit 2: screw holes on each side of the display connector would make it easy to test if a press-on solution is sufficient instead if soldering.
  21. Std boosterpack. You can see pics on http://lars.roland.bz/lcd but also her on 43oh.com. They were sold in the store. I am on a phone now, so difficult to find the right links. During design, I also wondered if I should have gone for a tactile joystick. They are quite cheap at dx.com, but four tactile buttons are cheaper. I think a cap touch addon board which raises the touch board a few mm and makes the display and touch pads at the same level is a good idea when mounting inside a box. See the 43oh thread on my display board for pictures of box mounting. I have some touch test boards
  22. Did you try pressing the fpc connector on, without soldering? Would it work if some screw and a plate to push them on to the board? Would make production very simple...
  23. On the display board I made, I used a transistor first, but then realized later I could just run it directly from a pin, through a limiting resistor. The reason I am asking for more buttons is that this looks like a good board to replace the one I made earlier, but may not make any more. The lcd I used is similar size and quality, but has to be bought in obscene minimum quantities. It was quite popular, so good for the community if this can replace it. I had one button and one touch option, and I thought maybe I could make a touch extension board to attach on top of yours. To allow use of
  24. Nice project. Would it be possible to fit 4 buttons in a future version. Is a transistor really needed for the backlight? Cant you run it straight from the mcu? Lars
  25. larsie

    USB Problem

    Thanks. I tried last night with your trick with another power supply at 3.3V instead of launchpad as you suggested + a shorter cable. Then it enumerates and works! I'll try your fm.rar also this weekend. Thank you very much. I had the 4MHz setting sorted already. What's the deal with the Launchpad-regulator not working? Too much noise, or too high voltage? I have an on-board 3.0V regulator I'm planning to use, but haven't soldered it on yet. The 3.3V on the USB +/- is sourced by the internal 3.3V regulator, from the VBUS, right? When it's turned on. I guess to get it working with a l
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