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OCY

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Everything posted by OCY

  1. Old Cow Yellow indeed. Nice to see you again!
  2. I am an old hobbyist but totally new to C2000 etc. Interested in using C2000 Piccolo LaunchPad to emulate a certain ancient machine. --OCY
  3. It is better than the LaunchPad. But not 34 time better.
  4. Vcc, Vss, plus the two SBW pins (RST & TEST).
  5. I do not think buffers need to be initialized, to zero (0) or any particular value. When you fill a buffer, the previous value is replaced. It does not matter what the value was. If you do not fill a buffer and try to read it, the value is meaningless and does not matter what the value is.
  6. OCY

    3-Pin MSP430?

    3-pin? No. But 4 pins is possible. Vcc, Vss, RST, and TEST are needed to program the Flash. After programming the Flash, you could cut RST and TEST too and get a 2-pin "functional" chip! The "function" is to sense Vcc and Temperature and transmit them to a near by radio. I did that without connecting anything to any Port Pins. But I have not tried actually cutting off those pins,
  7. Hello, I think you should consider a SCR or some kind of solid-state switch instead of a electromechanical relay. Do you have data for life expectancy of such a device if you make-and-break at the rate of once per second? -- OCY
  8. The button S2 might bounce. If it bounces an odd number of times, it appears to be "working". But if it bounces an even number of time, it appears to be "not working".
  9. Mark the calendar, but do not hold you breath. It is probably for G2xx3, with UART etc.
  10. Here is another example. http://e2e.ti.com/support/microcontroll ... 93751.aspx Posted by Doug Bennett replied on Wed, Feb 16 2011 10:33 PM
  11. RobG, Thanks. Are you using CCS? Which version? Good to know that it works for you/ --OCY
  12. On the TI E2E, there were a quite a number of posts that say they cannot use CCS to program G2453 at all. What were you using? And how is it now? I suspect that some of TI's assembly site are not up to par. What are the markings on the chip you got? Especially the string of characters after the TI logo? I am very curious about this. Thanks --OCY
  13. How are the dip switches connected? Each between a P1 pin and ground? Are there pull-up resistors? If not, you could use the on-chip P1REN and P1OUT to pull them up. Depend on pull-up, R, and the parasitic capacitance, C, you may also need to delay ~2*R*C after power up before you read the input.
  14. F5xx and F6xx have hardware FLL. That is, the DCO can be dynamically adjusted by hardware according to a "reference". You normally do not need to calibrate the DCO. If you do want to, you need to disable the hardware DCO and do it your way. Read the User's Guide for F5xx/F6xx, not the one for F2xx/G2xx.
  15. OCY

    fatal error

    But before you added one, there may already exit one.
  16. OCY

    fatal error

    It sounds like you have 2 ISR for Port 2. One of them is at 0x830E, and the other is at 0x9D94. Is it possible that before you "added ISR Port 2", you already had an ISR for Port 2?
  17. OCY

    fatal error

    If you take out this ISR for Port 2 (as a test), does it "work" as before?
  18. OCY

    fatal error

    The compiler and linker are pure software inside your PC. They have nothing to do with the MSP430 chip nor the FET hardware tools. When you want to "download" the object to the MSP430 via the FET, you got those errors because the drivers and dlls for these hardware are not set up correctly, not connected correctly, or not working correctly.
  19. OCY

    Jajajaja-Ta

    GeekDoc, Thanks but no thanks. I am perfectly happy with what I got and can even give up some of them. (Indoor pluming is one thing I won't give up. I get up three or four times in the middle of the night :oops: ) I live in the Santa Cruz Mountains in California. About 7 miles east of Loma Prieta (epicenter of 1987 earthquake). --OCY
  20. I know 99-cent stores often have toy compass. If you hold it near a wire that carries 100A, the needle sure will tilt. You just need to label "North" as "Charging" and give some good instructions of how to use it.
  21. OCY

    Jajajaja-Ta

    Don't laugh, my camera ran out of film (120 format). I do not have a cell phone. My PC is not able to run TI CCS. My internet access is at 21.6 kbps. (I do have running water, from a well -- and indoor pluming. )
  22. It is not easy to handle 200A. A "shunt resistor" of 0.1 Ohm will generate 4000W of heat. W = I * I * R = 200 * 200 * 0.1 = 4000 http://www.rc-electronics-usa.com/buy-c ... shunt.html will sell you a "shunt resistor" of 0.0002 Ohm. This will only generate 8W of heat and 100mV output. Take a look at the picture and the price tag. http://www.allegromicro.com/en/Products ... /index.asp will sell you a "shunt resistor" of 0.0001 Ohm with an integrated Hall effect sensor. But you cannot "clip-on" to anything. You need to integrate it to the charger.
  23. OCY

    Playing music

    Very interesting project. I did something with those same hardware
  24. I do not see any problem. RXD signals for both the MSP430s can be connected together and driven by the USB interface. TXD signals from the MSP430s could use serial resistors and then connect together to drive the USB interface. This is to prevent contention despite of the fact that only one of the MSP430s should drive it at any given time (the other one should switch to DIR=0 and ignore the input).
  25. The pin assignments are different on different packages of the same chip. See the "Device Pinout" near the beginning of the data-sheet. PW, N, and RSA are package names.
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