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enl last won the day on June 18 2017

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About enl

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  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
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