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Questions tagged [msp430]

The MSP430 is a Texas Instruments low-power microcontroller family.

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MSP430 programming JTAG

For programming MSP430 MCUs through JTAG, is this Schematic correct? I look for a reference design to make sure it will work:
Andromeda's user avatar
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Vcc for MSP430FR6047 with a battery- Ultra-Low-Power system

I want to design an Ultra low Power device with MSP430FR6047, which can work over 10 years. For the supply power of MSP430FR6047 in the datasheet it is mentioned that the voltage on the supply pin ...
Andromeda's user avatar
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MSP430FR6047 power supply- bypass capacitors

I'm working on MSP430FR6047 and I cam across a reference design from Texas instrument. In one of the supply pins they have use an 600 Ohm resistor as follows: Does any one know why? and what is the ...
Andromeda's user avatar
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MSP430FR6989 ADC Voltmeter

I am working on a project that converts a ADC signal to display a voltage on my BoosterPack Mk II. My code is working however I would like to display decimal places of the voltage it is reading. Any ...
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Communication Issue with TCA9539 on MSP430FR4132

I am trying to communicate with the TCA9539 using my MSP430FR4132, but I'm encountering issues setting the registers using I2C. I've connected pull-up resistors (10kΩ) to both the SCL and SDA lines. ...
Aswin Raj K's user avatar
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300 views

LCD 16x2 not taking commands from MSP430FR2355

I have been facing this issue for about a week, and after hours of trying to debug it, I was hoping I could find some help here. I have been trying to use an LCD 16x2 screen (unaware of the exact ...
Pixeled's user avatar
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4 votes
4 answers
396 views

What technology to use with multiple embedded systems talking to each other?

I am planning on building a system with one master and multiple slaves using MSP430 microcontrollers. The microcontrollers must talk with each other with serial interface using RS-485. I now need to ...
vawp's user avatar
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Digital I/O using the MSP-EXP430FR6989

The problem I am trying to solve is: Write a program which controls 8 LEDs connected to Port 2 of the MSP430. A momentary switch (push button) should be connected to Port 1.5 When the button is ...
Logan LiVigni's user avatar
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Digital I/O: MSP430

My question is: Write a program which controls 8 LEDs connected to Port 2 of the MSP430. A momentary switch (push button) should be connected to Port 1.5 When the button is pressed, the LEDs should ...
Logan LiVigni's user avatar
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3 answers
59 views

Dual power input

I'm reviewing this Dual power system. Why do systems need dual power inputs ?` Are the inputs pulled to system simultaneously, or is it one at a time?
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H-bridge 12V DC to 12VAC squarewave output

I am trying to convert DC to AC, in this case, 12VDC to 12VAC at 50Hz. I am using MSP430G2553 TI microcontroller to create Mosfet gate pulse. Mosfet model is IRFZ44N. The load is a 200 ohm resistor. A ...
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Reading TCS34725 with MSP430G2553

I'm trying to read the red color data from the TCS34725 color sensor that is attached to this board by Grove (https://www.seeedstudio.com/Grove-I2C-Color-Sensor-V2.html) by combining its low value and ...
JAladwan1's user avatar
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2 answers
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Passkey register in microcontroller MSP430FR59xx

We recently had a Power Aware Computing class on the university where we used the microcontroller MSP430FR59xx. We had to examine how different voltages, clock frequencies, ULP modes affect the power ...
Ribisl's user avatar
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MSP430FR4133 Low Battery Voltage Periodic Monitoring

Here is the code I used to configure and monitor my voltage that when it becomes 1.2V, BATTERY_ON symbol on my LCD is ON. The checking of voltage is every 10 seconds. This code below works using ...
Bravo's user avatar
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I cant debug this code

...
Katia Katia's user avatar
14 votes
4 answers
2k views

32kHz crystal long start time on 10% of PCBs we order

We have a PCB with a TI MSP430FR2311. On approx. 10% of the PCBs we order we notice that the crystal startup time reaches several seconds or doesn't start to oscillate at all. I assume this issue is ...
Juicer's user avatar
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1 answer
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MSP430 i2c txn buffer not moving second buffer command

In this code i have used B0 I2C module. Problem - I f i I2C_Txn_byte() to send any command it sends the it the first time but doesn't get in the interrupt ISR again for Example ...
SlickDaDDy's user avatar
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3 answers
351 views

MSP430 delay using timer with polling condition

Need help with this code, it is not creating any delay. I tried simulating this code in Proteus. ...
SlickDaDDy's user avatar
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0 answers
78 views

MSP430 Program Not Running Outside Debugger

I'm using a MSP430g2231 with EXP430G2 launchpad and CCS. My code runs fine in the debugger, but when I try to burn it to the MSP and run on external power it doesn't run. It appears that it is not ...
BrainUnderflow's user avatar
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Help in system initialization and clock configuration of MSP430F427A MCU interfaced with custom LCD

When I debug the code, the LCD refreshes rapidly. I am not confident with the correct system clock configuration to use. Moreover, after debugging, in release mode, nothing displays on my LCD nor the ...
Bravo's user avatar
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MSP430 ADC sampling does not work right

I am trying to get the 12bit ADC of the MSP430F5529 working. For this reason I want to read values from its internal temperature sensor every 2 seconds. The ADC setup is in the main.c file and the ...
crispus's user avatar
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Bootloading : PC to USB to [MSP430 with USB] to I2C to [MSP430 without USB]

If I have a pair of MSP430s on a system, one with USB functionality and one without, is there an easy means to program the MSP430 without USB via the ...
kando's user avatar
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The output of my instrumentation amplifier (INA121) is not seen in the microcontroller (MSP430)

I am using an INA121 instrumentation amplifier, and its output is 156 mV, but it is not seen in the microcontroller, it is just giving 0 like: I increased its output voltage (gain) by decreasing the ...
Merve Özdaş's user avatar
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EEG signals does not give the negative point in microcontroller

I made my own EEG circuit, and have some problems. In the beginning, I did not come across this situation but, suddenly, I started to get these outputs, and I could not find the reason. When I upload ...
Merve Özdaş's user avatar
2 votes
1 answer
212 views

MSP430 I2C communication no ACK

I'm trying to get I2C working with the MSP4302231 and had and still have some problems. The main problem is that I don't get an ACK from the slave to which I send its address on the I2C bus. Noticed ...
ulix's user avatar
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1 answer
156 views

MSP430 I2C no ACK send over Bus - updated but still not working

I'm trying to get an I2C communication with an MSP430 (MSP430G2231) working. This is the first time I'm using a MSP430 for I2C and not sure if I'm doing everything correctly. I have a Slave connected ...
ulix's user avatar
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MSP430G2553: ISR not triggering when I2CTX-Flag is set

So I need to get an I2C up and running. To do so the µC relies on ISR's to push data byte by byte onto the data-line. So far so good I programmed my functions and ISR's to transmit and receive data. I ...
Steve's user avatar
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Ultrasonic Anemometer -- editing dev board to create pcb?

I want to design a PCB that uses TI's MSP430FR6043 microcontroller. The purpose is to make an ultrasonic anemometer. The basic idea is that the MSP430 sends out a pulse to an ultrasonic transducer, ...
ewineteer's user avatar
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2 answers
161 views

How to program MSP430FR6989 single chip

So i have done microcontroller programming of the MSP430FR6989 with its own development board using TI's CCS. For this project, however, I need to program the individual chip to place into a custom ...
narusik's user avatar
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MSP430 RTC_B Back up Battery Supply

I plan on using MSP430F5636IPZ from Texas Instruments as my microcontroller in a project which I am currently working on. The MCU comes with a RTC_B (Real Time Clock) with Battery Backup capability. ...
solitude_surfer's user avatar
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247 views

Minimum MCU clock frequency to process an analog signal with a max. frequency component of 50 kHz

An MCU requiring 4 clock cycles to process a sample has to sample an analog signal having a maximum frequency component of 50 kHz. What should be the minimum clock frequency of the MCU? This image was ...
Yuva Adhithyan's user avatar
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1 answer
221 views

Using a ULN2003A to drive a solid-state relay

I plan to use a MSP430 microcontroller to drive three different DC-DC solid-state relays. The thing is that the MSP430 provides a digital output of only 3 VDC @ 15 mA. (Vol: low-level output voltage). ...
solitude_surfer's user avatar
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Why am I seeing erratic behavior by a variable stored in "information memory" on MSP430?

Sometimes a variable in information memory updates as expected and sometimes not. For example, I would expect the following program to print... 0 0 1 ...but, in ...
bigjosh's user avatar
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1 vote
1 answer
304 views

How to set up MCP430 Pins for SBW?

Hello I'm a senior in college and I'm trying to develop a development board for the MSP430G2533IN20 Microcontroller, this is my first time working with TI MCU's, but I've worked with STM32 before. I'm ...
Mark Volosov's user avatar
1 vote
1 answer
106 views

MSP 430G2553 Keypad Error

I am trying to use 4x3 Keypad with MSP430G2553. I used code from electronicwings site ...
armancj2's user avatar
4 votes
0 answers
139 views

Any way to have MSP430 wake from sleep and immediately start executing the next instruction after the sleep, avoiding calling into the ISR?

I am executing a simple state machine that steps based on a pin change and sleeps between steps. A significant amount of time is spent in the overhead overhead of calling the ISR on each pin change, ...
bigjosh's user avatar
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2 answers
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I2C bus logic voltage confusion (same device different VDD & VIO recommendations)

I have a master (MSP430 with 3.3 V) and only one slave (TMF8805 at 3.3 V). My confusion comes from the sensor's datasheet where the power supply (absolute max ratings) allow for 2.7 V to 3.3 V. This ...
Weegeemaan32's user avatar
2 votes
1 answer
108 views

Triggering ADC conversions with a timer on the MSP430FR5969

I am trying to repeatedly sample one channel from the ADC on my MSP430FR5969 using timer TA0. Unfortunately, the timer doesn't appear to be causing conversions. I expect my issue lies in my ...
Rohan Menon's user avatar
1 vote
1 answer
136 views

Is there a standard interface connector or layout for MSP430's "Spy-Bi-Wire" (SBW) interface?

Is there some standard order and/or footprint that people use for these 4 pins? Something akin to the standard 2x3 6-pin ISP layout for AVR chips?
bigjosh's user avatar
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4 answers
249 views

Can a MSP430 be programmed with only VDD/RST/TST/GND connectors?

I've inherited a bit of a project and I need help. I have a PCB with only VDD/RST/TST/GND connectors and a MSP430-G2402 controller on the other side. I need to reprogram the microcontroller. I ideally ...
DavidMc1's user avatar
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1 answer
103 views

MSP430 ADC, using a different memory slot other than MEM0

I'm working with the MSP430Ware Sample Code for a basic ADC on the MSP-EXP430FR5994 development board. On the code, it uses MEM0 and the supporting infrastructure such as flag 0 to convert. The one ...
HFOrangefish's user avatar
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1 answer
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How do I check compatibility of MCUs? I want to connect an ESP32 and an MSP430 together

I want to connect an MSP430FR6989 and ESP32 together in order to give the MSP430 WiFi functionality for a project I am working on. I am still new to working with MCUs so I was wondering if it is ...
BrettC's user avatar
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2 votes
1 answer
257 views

nRF24L01+ Doesn't Receive Packets

I am trying to send data from one MSP430 to another MSP430 using Nordic Semiconductor nRF24L01+ radios, but I am unable to receive transmitted packets. I am able to read from and write to the radio ...
dman's user avatar
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0 votes
1 answer
186 views

How to flash MSP430G2211 MCU?

After experimenting a light sensing tool on TI MSP430G2ET with MSP430G2553, I designed a real scheamatic and PCB with MSP430G2211. I used MSP430G2211 because it has less pinout and smaller than ...
Penny's user avatar
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3 votes
2 answers
278 views

Can I use a timer delay inside a i/o interrupt handler?

I'm using 12MHz HFXTCLK with full strength on my launchpad.I did not use any presacalar value for SMCLK (I used prescalar only for the timer). I'm using full speed 12MHz clock to my system. I want to ...
Shiv's user avatar
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0 votes
1 answer
483 views

MSP430 UART Trouble

I'm trying to learn how to use UART on a MSP430G2553 and I wrote this simple program. The program should set up a timer interrupt to happen once a second. The interrupt service routine should toggle a ...
dman's user avatar
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0 votes
1 answer
516 views

MSP430 Timer Interrupt Not Happening

I recently starting learning how to program a MSP430 and thought I'd start by writing a program to turn a LED on and off every second. However, when I run my code the LED goes on an stays on. When I ...
dman's user avatar
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2 votes
2 answers
262 views

Why is my I2C function inverting bytes?

I'm working with a MSP430G2553 and a BMP180 sensor. I have the following function in my program ...
EmTor's user avatar
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1 answer
122 views

Is the dipping in VCC caused by inrush current of charging 1 uF and 0.1 uF capacitors?

I'm powering MSP430FR5994 microcontroller from a power supply using a 2.2 V regulator. This regulator can source up to 200 mA. When MSP430 turns on, it starts to charge a 1 uF and 0.1 uF by driving ...
Aalsubhi's user avatar
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249 views

Interfacing MSP430 FRAUNCHPAD with MAX30102

I'm trying to interface the MAXIM MAX30102 with the MSP430FR5739 using I2C protocol. I'm using pull-up resistors (4.7 KOhm) on SDA and SCL lines, using a breakout board. However, the code stucks in ...
slow_breath's user avatar

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