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enl

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Everything posted by enl

  1. I asked this a year ago and got no response. Most of the spam I have reported has been removed eventually, but sometimes a few days go by. It appears that this forum is no longer a priority, I would guess, in part, due to the decline in traffic and the MSP430 moving away from the ed and hobby worlds over the last decade as other platforms have moved in. The commercial side of 43oh saw its last update about three years ago.
  2. The short, two line tall, window at the bottom lists the errors. Can you expand that and show the errors?
  3. Lets work through a few things here... Frequency is the number of complete cycles per second. This can be determined a number of ways. The scheme you seem to be going for is to time a cycle. This would be from an edge to the next instance of the same type edge- rising to rising, for example. This will produce a count that is a time. The base unit may be microseconds at a 1MHz clock, but it is a time- the period of the signal. The frequency unit will be the reciprocal of this. Lets say that the count is 140. This means that 140microseconds (140E-6 seconds) lapsed from one rising edge
  4. Several things here: where are/what are the declarations for the variables you are using? The types matter here. You seem to be using the capture mode, but you are not ever pulling the captured value from the TACCRx in the interrupt handler. A capture event copies the value from the count register to the CCR Please explain a bit about what your method is here. (as an aside, much of the documentation you have is not useful- it should express what the statements mean in terms of the solution. For example: "CounterValue++; // Increment CounterValue" What does cou
  5. To follow up with @Rei Vilo the actual errors are important here, as is the processor (though I would presume G2553 given where you put the question). Also, the interface module you are trying to use (I2C I would hope, since the MMA8452Q only communicates with I2C), what header files you included, what processor you selected in CCS project setup, and so on.
  6. Yes. That will cause trouble. Energia sets up the WDT itself. It is used for timekeeping to support the time functions. DO NOT disable it for Energia. If you are NOT using Energia, you (probably) need to disable the WDT, periodically kick it, or set it up for your application if you will use it as a standard timer. The purpose of Energia, or Arduino, is to provide a layer of abstraction between tasks like device setup and processor initialization and the programmer so less experienced users don't get buried in the details, as well as provide a suite of utility functions and
  7. If I recall correctly: I do not think you need to do any watchdog setup with Energia. The Energia core sets it up as for use as the timebase for time functions. Any changes you make to the setting outside the Energia envelope will cause issues. See:
  8. They are not connected to the relay. They go directly to the load. To turn the load on or off, you need only interrupt one current carrying wire. You usually want to interrupt the HOT lead, so when the switch is off, no part of the controlled device presents a voltage that is a hazard. (This, of course, does not consider parts that store energy, like capacitors) (If you have further questions, ASK. Better to ask than someone get hurt or property get damaged. But please do tell us where you are located. The systems in the US/Canada, UK, rest of the EU, India, etc, all di
  9. Presuming you are trying to switch the power to an AC-powered device, such as a lamp or small appliance: You generally want the COM and NO (normally open) contacts. When the relay coil is not energized, these are OPEN (disconnected) so the load will be off. If you want the load to be ON when the relay coil is not energized, use COM and NC. If you want to switch between two loads, the loads go on NO and NC, and the source goes to COM. In general, the HOT current carrying wire goes to the relay COM, and the NEUTRAL (grounded) is left unswitched. The EARTH (safety) ground is not
  10. This is why I said it is odd, but I have never tried it myself with devices that are so closely related. I don't know if it actually was programmed with the wrong device specified, but I can see no reason there would be damage IF it was programmed this way.
  11. Odd that it programmed without an error due to the incorrect device. I would figure that there shouldn't be any issues, though. (this may not be clear.... sorry) The device selection for CCS gives the compiler information to select the device specific header file (which is a big part of information about what modules are available), as well as memory size and layout (so the compiler can do the allocation appropriately and know if there isn't sufficient memory-RAM or code memory- for the build). If you had tried to use a module that isn't available in the 2453 or the build needed more
  12. To elaborate: The MSP432p401r has two headers (J8 and J102, both being 5X2 pins) next to a row of ten jumper blocks (labelled GND, 5V, 3V3, ... TDO, TDI). The jumpers bridge the dashed line that separates the programmer/debugger side of the LP from the on board MSP432. If you remove the jumpers (ALL ten of them,) the on-board MSP432 will be completely isolated from the programmer, and J102 can be used to program an external unit. See sections 2.3.1 and 2.3.4 of http://www.ti.com/lit/ug/slau597f/slau597f.pdf That depends on how many units you need to program. For small
  13. I don't believe the FR2355 has timerA modules. The diagram at http://www.ti.com/product/MSP430FR2355 shows only four timerB modules
  14. enl

    LCD for MSP430G2

    slac467 zip archive at www.ti.com/lit/sw/slac467i/slac467i.zip has a number of examples (IIRC, there are several SPI, I2C and asynch serial examples). slac435 is the sample code for the launchpad, but all of the samples use timerA0 and software, rather than the hardware serial. It has been so long since I built my toolkit, I can't recall which samples I stole from (I just ref'd slac467 and slac080 in my docs) THere are resources on this forum like There are a lot of examples around the web, such as https://www.embeddedrelated.com/showarticle/420.php Definitely see slau
  15. enl

    LCD for MSP430G2

    Depends on the size you want (physical and lines/chars per line), but there are a lot of options. I have used a numbers of them, including these in the last 6 months: Parallax 27977 2 lines X16 chars (pricey-- about $30), which is 5V supply, but the serial functions ok at 3.3V. Noritake GE256X64B-7032B 256X64 pixel (currently on clearance at Noritake site... about $15) A couple from Adafruit that appear to be out of stock (a 20X4 and a 16X2, using the HC44780) Several models of Noritake VFD's There are a ton of models available from the us
  16. Rei Vilo hit the main point I will ask WHICH blink example you are referring to. There are a number of them. Background: the basic structure is that you turn on the LED, have a delay, turn off the LED, and another delay. What you did include your message does not show the delay... it is what turn on hte LED. There is a delay somewhere, and that is where you want the random value. You may want to restrict the random value to a certain range to keep the random blinking reasonable in appearance.
  17. I am sorry that I can't help you with this, but no Mac tho test on. Hopefully someone else will come in with something. If you find a solution elsewhere or on your own, please follow up here.
  18. I'll bite. Still teaching engineering. and still work as weld engineer (and whatever other label they need) for the same company. Doing more work on the side. Pumped out about 3K lines of code for a machine control during June and July (and hardware to interface to the existing hardware). Got introduced to a new-to-me form of NDA that essentially makes the two months not exist in my resume. Device used was an MSP430, as it was sufficient and I have them in stock. CNC'd my lathe (another MSP430... yup I have a pretty big stock of several flavours) As winter app
  19. UCSSEL_2 is the selector bit set for the sub-main clock as the clock source for the UCB serial module. I have not looked through the code (and do not use the MSP432 processors) so I I can't give details, and someone else may be able to give you a full answer, but if you see assignments to UCBxBR0 and UCBxBR1, these are setting the baud rate register divider (the BR in the names is for "BAUD RATE"). If no one comes in with more complete information in the next day or two, I can look at the source.
  20. I don't have the libs you are looking for, but I would guess that someone may be able to help you in the next day or two. The traffic here has slowed is fairly low these days, but many of the members do check in fairly often. If you don't hear anything in a day or two, I will do some digging. If you find the library you need elsewhere (or find it here somewhere), please do follow up in this thread.
  21. That indicates that the 0ohm resistor is in place, as it should be. This pretty much leads to the conclusion that either you have an issue with the jumper you are using to ground the reset pin, or there is something really, really weird. If it is something really, really weird, it will make you slap your head with a ball pein hammer when you find it. One thing to note about the use of a jumper: the stock pin headers on most of the various launchpads I have are suitable for a board connector, but the pins are borderline for a female shell connector on a cable. It seems weird wh
  22. I am presuming that you have the proper ground connection for the various methods you are trying: Connect a scope probe to the reset pin on the header (P2, pin 5) and push the reset button. You should see the line go from high to low If not, the pin is not connected to the line. It should reflect the state of the button, but is listed in swru372b as an OUTPUT (tab;l 8 on page 13, and fig 8 pin map) for resetting daughterboards, and though it should be usable as an input based on the schmatic. What I would guess is not there is the 0ohm resistor R84 that co
  23. SInce no other responses have come along, I will get the ball rolling by asking for a bit more detail. What errors are you getting? What are you trying to do with the watchdog? As far as I know (not using the CC32XX series), Energia supports the 3220 launchpad board. See https://forum.43oh.com/topic/13311-connecting-cc3220sf-to-cayenne-mqtt-using-energia/ (Rei Vilo's msg: 6th in the thread)
  24. Glad to see you worked it out. For most standard/common setups, I keep a collection of code snippets, so I don't need to think too hard.
  25. There are two answers: 1: Strictly using hardware, you have two independent PWM channels, as long as you aren't using either timer for anything else (the two TIMER_A modules-- timer type A, a 16 bit with counter with a selection of control inputs for counting, output modes, and other options. Other MSP430 devices may include other timer types, such as TIMER_B). There are several pins that can be attached to each for PWM output, but, for practical purposes, they are not independent. 2: Using software, you can have as many PWM as you have output pins, but more than 8 gets
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