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  1. Usama

    MSP430 GPS

    Hi, Is there any GPS library for energia that supports MSP430g2553? TinyGPS++ doesn't seem to work. Please help. Thank you.
  2. Hi, When doing offset calibration for pH sensor in Arduino we bring pH 7 to 2.5V as Arduino analog output is 5V. Does that mean when the same is done with msp430g2553 the voltage be adjusted to 1.5V as msp430g2553 analog pins output around 3V only? When I tried adjusting the pot I could only bring it to a minimum of 2.5V with msp430. Does anyone know why? Thanks.
  3. I'm trying to create a toggle button but the code is not working. The code is as shown below: #include <msp430g2553.h> int main(void) { WDTCTL = WDTPW + WDTHOLD; // stop watchdog timer P1DIR &= ~BIT3; //P1.3 i/p P1REN |= BIT3; //P1.3 enable pullup resistor P1IES |= BIT3; //P1.3 high to low transition P1IFG &= ~BIT3; //P1.3 clear interrupt flag P1IE |= BIT3; //enable P1.3 interrupt P1DIR |= BIT0; //P1.0 o/p P1OUT &= ~BIT0; //clear P1.0 _BIS_SR(LPM0_bits + GIE); //enter LPM0 with interrupts enabled } #pragma vector = PORT1_VECTO
  4. I have been trying to interface DHT11 sensor with MSP430G2553. But I always end up getting a checksum error. I have attched the code and the library I am using. My sensor is the normal one with 4 pins coming out of it. I connect pin1 to Vcc(3.3V), pin2 to data pin(P1_3) and pin4 to GND. Please help. #include <dht.h> dht DHT; #define DHT11_PIN 5 void setup() { Serial.begin(9600); Serial.println("DHT TEST PROGRAM "); Serial.print("LIBRARY VERSION: "); Serial.println(DHT_LIB_VERSION); Serial.println(); Serial.println("Type,\tstatus,\tHumidity (%),\tTemperature (C)"); }
  5. I am trying to establish SoftwareSerial Communication between 2 msp430g2553 units. I have connected them as follows: GND to GND, RX to TX and vice versa. MSP1: P1_5, P1_7 //Rx,Tx MSP2: P1_5, P1_7//Rx, Tx , I hope the connection is all right. Now, I want to send a byte from one mcu to the other for which I write the following code: Send function: void sendrequest(){ byte option = 1; mySerial.write(option); delay(2); return; } void loop() { // put your main code here, to run repeatedly: if(mySerial.available()>0){ checkiffalsesignal(); delay(10000);
  6. I had a HDC1080 EVM. I read that the back end of the evm can be broken off from the perforation and used as a standalone sensor on a micro-controller. I tried to interface it with the MSP430G2553. I have done the following with no avail: 1) the jumper on P1.6 has been removed(no interference of led with SCL line) 2) I have tried using pullup resistors on both the SCL and SDA lines. I have tried out with the standard 4.7k resistors and also with 10k resistors. 3) I always get a temperature value of -40 degree C and humidity of 0%, which means that the MSP is not able to
  7. I am trying to implement the msp430g2553 on a breadboard. Where should I add the reset button. I am not sure, but I think it should be added between reset pin and ground. BTW, I have the msp430 working on the breadboard, 47k between RST and Vcc and 1 nF between RST and GND. Where to add the pushbutton? The pushbutton is really handy for resetting
  8. I want to interface a DHT11 temperature and humidity sensor with my MSP430G2553. I looked up the Energia list of libraries, but the link for DHT11 is currently inactive. I tried downloading libraries from github, even ported over libraries from arduino, but none of them are working. I either get timeout errors or nothing gets printed on serial monitor at all. I know for sure that my sensor is perfectly fine because I have tested it for multiple libraries on Arduino. Please provide me the link for a valid DHT11 Energia library or help me out otherwise.
  9. Hello, I have obtained a PWM code online written in C. What is the equivalent code if it is written in Energia - .ino file using Energia IDE libraries? Here is the code: #include <msp430g2553.h> void setup() { WDTCTL = WDTPW + WDTHOLD; // Stop WDT if (CALBC1_1MHZ==0xFF) // If calibration constant erased { while(1); // do not load, trap CPU!! } DCOCTL = 0; // Select lowest DCOx and MODx settings BCSCTL1 = CALBC1_1MHZ; // Set range DCOCTL = CALDCO_1MHZ;
  10. This is a fun project that was created for my embedded systems class at John Brown University that allows you to create your own quiz wizard similar to the jeopardy game show system. The main portion of this code is run on an MSP430F5529 launchpad, and nRF24L01 transceiver modules were used to obtain the wireless functionality. It makes use of the Enrf24.h library to operate the transceiver modules, and the user interface is output to the serial monitor of the energia IDE. Four buttons wired into the MSP430F5529 then allow the user to interact with the system. The wireless module was created
  11. I need to have a very accurate PWM frequency generated with my MSP430G2553IRHB32R. I'm shooting for 25.1khz. However, when running on different boards, I can see variances of up to 3khz in the frequency. I understand this is due to the slight inaccuracy in the processor's internal clock. So, I would like to attach an external crystal or oscillator to it but don't know how. I've read a couple places that say that this chip doesn't support a crystal, but that I could use an oscillator. The questions I have is how does one connect the oscillator, and what code changes are necessary to t
  12. Does anybody have working code for calculating heart beats per minute for the pulse sensor through energia. Been trying to find some but havent had any luck.
  13. Does anybody have working code that interfaces the msp430 and pulse sensor(meant for arduino) to calculate heart beats per minute. Or if you have something through Energia. Anything helps.. Thanks
  14. I would like to measure the voltage of a NiMH DC battery not exceeding 12V and I just knew that msp430g2553's ADC has an internal voltage divider. Is it appropriate to use the internal voltage divider directly without any external circuit?
  15. Hi, Is there a ready library for PID control available for MSP430F5438A or G2553 controllers. Please help if an example is available for the same. Thanks, Tanmay
  16. Hello, I am new to to MSP environment and I would like to have some help with this project. If this is on the wrong place of the forum or something like this please tell me so I can change it. I tried to make things on my own but I got stuck for 2 weeks trying to get my LCD to work properly with my first MSP. I also have acess to a friend's MSP430G2553, but the links some of the links on the forum where broken on http://43oh.com/2010/11/lcd-special-two-ways-to-interface-a-msp430-to-an-lcd/. The conections are most probably right because I can write without problems t
  17. Hi, I'm having a lot of trouble figuring out how to communicate with this Adafruit 7-segment display. I've looked through the Adafruit LED library, seen non-MSP microcontrollers working with the code, tried understanding the HT16K33 datasheet. I've even recorded the SCL and SDA signals from my Arduino connecting with the 7-segment. However, I'm still not sure how to get it to work with my MSP430G2553 or even how to get started. Though, I have looked into the MSP430 example code for i2c communications with the MSP430 as the master. Is it as simple as just converting the Adafruit LED l
  18. Hello there, I am new to this forum. I wanted a code which could help me create a neural network to correlate my sensor data and get the desired output. I am using MSP430G2553 micro-controller with Energia as the software. It will be a great help. Thanks in advance.
  19. I'm working on a project where I need to oscillate at 25khz. I've been using the PWM built into the MSP430G2553 and it doesn't seem to be accurate enough to give me exactly 25khz. I've been getting anywhere from 23khz to 27khz and cannot figure out why it's off by so much. I might be doing something wrong. Does anybody know what sort of accuracy I should expect from the on board PWM in the MSP430G2553. Is there a way to make it more accurate? I was looking at adding an external crystal, but would rather not add that complication if it isn't necessary.
  20. i bought two Mspexp430 launchpad with two cc110l rfand i could to programm them in energia : then i want to add more nodes on the Network so i bought two new Mspexp430 launchpad with new two cc110l rf and they work correctly on ATC boostersatcklite but when I want to program them on energia I can upload the code but the cc110l doesn’t exchange any data from each other , i tried also with the examples in energia (wirlessControl-WirlessTest-WirelessMonitorhub-WirelessmonitorSensor) but they did not work Can you help me to let them work correctly and exchange data
  21. Hi, I just noticed an excessive consumption of ram by Wire on G2553 (I did not test on other µC) : 400 bytes !! I took a look at Wire.h but can't find where this memory is used. If anyone can confirm this and/or have an idea about this issue ? Regards
  22. I'm new to MSP430 and I'm trying to do a frequency/period measurement. I've read about timers and get the main concepts though I'm still learning. To get an idea of how they work, I'm using this code. It outputs a PWM on one pin which I connect to another pin for capturing period: http://coecsl.ece.illinois.edu/ge423/datasheets/MSP430Ref_Guides/Cexamples/MSP430G2xx3 Code Examples/C/msp430g2xx3_ta_21.c After making some modifications (removing unneeded code to light led and adding calculations for frequency) it works with the original pins. However, I want to change which input pin will t
  23. Hi, I am using MSP430 launchpad with G2553 controller. When I am using sleep(5000), and varying the voltage on the controller from 3v to 4v the timing is varying based on the voltage, but the timing in not changing when I am using delay(5000) when I am varying voltage. Any help will be appreciated. Regards,
  24. Hi Everybody, I've been developing some code on Linux using CCSV7.2 and I already know that CCS will not program the g2553 like it would on a Windows box. But, I know that you guys are clever! How have you been programming and debugging the g2553 on Linux these days? Are you using a different LaunchPad and hot wiring it over to the G2553 LaunchPad?
  25. I wrote a sketch to fire 2 outputs back and forth with a pot to adjust the on time of the outputs and a pot to adjust the off time. The outputs are just LEDs for now and there is a 3rd LED that turns on when either output is on (so I can adjust the pots later when the outputs are only driving silent, solid state relays.) Every time the MSP430G2553 is powered up or reset, in the Launchpad or a bread board, all of the pins configured as outputs go high for about a second before the program starts to run There is a thread that comes up with a google search of the problem where everyone
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