Half duplex software uart on the launchpad msp430 launchpad. This code was originally created for njcs msp430 launchpad blog. This chapter introduces the launchpad and summarizes the contents of the launchpad kit. The ti msp430 launchpad ships with a msp430g2231 and a msp430g2211, microcontrollers sourced from tis value line. The msp430g2553 or any msp430 in the socket is connected to the computer via usb using a combination of msp430 and a tusb3410 or similar usb device. Read about msp430 based mspexp430g2 launchpad value line development kit on. Uart serial connection from the msp430g2xx device to the host pc or a connected. Msp430 uart tx interrupt enablingdisabling stack overflow. So the restriction will apply whether using hardware or software uart, unless you decide to use some other hardware than the launchpad to interface with your pc.
Ti provides applicationspecific evaluation modules evms along with software and documentation speed your time to market. It also provides a backchannel uart connection between the computers usb interface and the mcus uart. Since energia uses one or the other depending on the availability of a hardware uart as you correctly pointed out, the chip selection changes the pin meaning and requires different jumper settings on the launchpad board. Msp430 functioncodeexamples is a collection of code examples for use with the msp430fr2000, msp430fr2100, msp430fr2110 and msp430fr2111 microcontrollers.
Energia is an opensource electronics prototyping platform started by robert wessels in january of 2012 with the goal to bring the wiring and arduino framework to the texas instruments msp430 based launchpad. This is different from other boosterpacks, where the software examples are for a host launchpad mcu only. The launchpad demo code for the other g series msps not the g2553 use a software uart with support of the timer. Instead, the uart connections on the launchpad board are routed to the emulators usb connection. However, this softwar euart requires the exact same two pins as the hardware uart fo the 2553. Getting started with msp430 using energia ide youtube. If you havent already, connect to your msp430 launchpad and take note of its enumerated com port. A collection of c libraries for the ti msp430 family of microcontrollers.
The msp430g2553 offers a usci interface that is capable of communicating through uart at up to 2 mbaud, but to be aligned with all the other msp430g2xx devices, the demo uses the timer uart implementation, which can be used on all the other devices. The timing is dependant on smclk, which is set to 1mhz. Uart communication basics, working, applications, pros and. However as soon as i disable tx interrupts once, i am never able to enter the isr again. Uart communication can be useful when dealing with sensors. Uart communication stands for universal asynchronous receivertransmitter. Making a software uart which can receive was a clear first step in making sure we can get an adc to work.
This application report describes an open source implementation of the low cost, mspexp430g2 launchpad based msp430 uart bootstrap loader bsl interface. Msp430 based mspexp430g2 launchpad value line development kit features ships with required tools videos accessories other tools blog posts. It provides features for the configuration of data format and transmission speeds at different baud rates. This example shows how to use software uart on the ti launchpad with a msp430g2231 mcu which does not have a hardware uart. Launchpadbased msp430 uart bsl interface texas instruments. This driver package contains all necessary lowlevel usb drivers for msp430 usb debugging tools fets. One of which, the msp430g2231 is preloaded with demo functionality demonstrating. The baud rate limitation isnt on the msp430 side but rather is a limitation of the usb to uart interface chip that is on the launchpad, connected to the msp430. Note that if you have not used the adapter before, the drivers wont be installed.
The drivers for the uart are located in msp430 toolchain directory\drivers. The official one is the code composer studio commonly known as the ccs. Resolved uart by software in msp430g2553 msp lowpower. Msp4340 launchpad simple uart config and echo mcuhq. The msp430 is an easytouse flash programming microcontroller specifically designed to be lowcost and lowpowered, suitable for a range of applications. Configuring and using the msp430 uart gustavo litovsky. Software uart example for msp430 using mps430gcc on linux wendlersmsp430 softuart. This post will describe how i use the usi as a uart and discuss how i hook the launchpad up to a msp430f20 on my breadboard which is connected to an ftdi breakout board. I have msp430 family mcu actually msp430g2553 on launchpad board. Indy module with msp430 1 usbuart bridge impinj support.
Click the add button and you should see a comport icon appear. Jun 15, 20 launchpad has usb uart bridge virtual com port limited to 9600 bps. Serial communication my journey with microcontrollers. The getting started with the msp430 launchpad workshop is free, online, indepth introduction into msp430 basics including. Configuring and using the msp430 uart january 30, 2011 msp430, software baud, baud rate, ez430, ez430rf2500, msp430, uart, usb glitovsky embedded applications are. It is a dedicated hardware device that performs asynchronous serial communication.
It explains the launchpad by drawing similarities to a human neural system consisting of the brain, the senses, and the actions. Mspexp430g2 launchpad experimenter board users guide rev. Energia started out to bring the wiring and arduino framework to the texas instruments msp430 launchpad. On the launchpad, i recall there being a series of jumpers that connect the top part of the board with the programmer, usb port, etc to the bottom part of the board which has the actual mcu, leds, output ports, etc. If you dont already have software to communicate via serial port, download putty. Identifying the different components and their roles help readers understand how the launchpad and the msp430 microcontroller. Serial communication my journey with microcontrollers and. Another option is to use a software method via the uart hardware module.
The launchpad can be programmed using code composer studio ccs or few other software like energia ide which helps you to easily get started with ti microcontrollers. In section 7, youll see how to use software to create a uart on a device that may lack that peripheral. Library of peripheral drivers, component drivers, utilities, and more. Mar 26, 20 the launchpad demo code for the other g series msps not the g2553 use a software uart with support of the timer. Open device manager to find out the com port number of the msp430 board. I got the uw uart up and running so far, using putty and the virtual msp430 application uart com port. Figure 5 shows an example of the hardware connection between the pc running the bsl scripter and the. Using the uart interface of the msp430 devices visualgdb. The g2xx3 series of the msp430 value line includes a hardware uart on pins x.
A driver circuit handles electric signaling levels between two circuits. At the heart of the texas instruments launchpad range of development boards is the msp430. This is a basic software uart application for ti msp430x2xx. I have timer a ticking away at 32khz, but thats a bit low to be useful i think. Other professional development environments are also available, such as tis eclipsebased code composer studio and iar embedded workbench. Msp430 launchpad is a hardware development tool for msp430 value line series of microcontrollers and is popular among hobbyist for its low cost and features. Jun 07, 2015 in msp430, serial communication is handled by an on chip peripheral called usci universal serial communications interface.
Use arduino code on a ti launchpad msp430 instructables. This code provides a simple bidirectional half duplex software uart. Jan 08, 2014 for hardware uart via launchpad without having to use the rs232 cable and max232 ic. If you have an msp430 mcu which does not support hardware uart e.
Cool right okay now, let us move on to the software environment. Guis and support for multiple ides for rapid development with msp430 mcus including tiowned software libraries. Communication, pulse width modulation, system and housekeeping, and timer. Texas instruments offers a msp430, msp432x, tm4c, c2000, cc32xx and ccxx launchpad. Mar 08, 2018 learn how to get started with msp430 launchpad and blink an led. System utilities downloads msp430 gang programmer by texas instruments incorporated and many more programs are available for instant and free download.
I would like to use a pin on an msp430f1691611 to receive gps data at 4800 baud. Msp430 launchpad mspexp430g2 demo application youtube. Mar 28, 2016 msp430 launchpad gui composer example. Jun 22, 2010 msp430 launchpad provides 2 msp430 value line microcontrollers. Nov 26, 2003 you could also look at implementing the spi in software instead of the uart in software if the operating speed of the spi doesnt need to be too high. For more information visit the msp debug stack wiki page. In this example sending an r or g will turn the red and green leds on and sending an r or g will turn them off, respectively.
For new development, visit the mspexp430g2et launchpad kit, which has replaced the mspexp430g2 kit to develop using an mspexp430g2 launchpad kit visit ti resource explorer and start development with the online ccs cloud ide. Hands on with the texas instruments msp430 launchpad and. Before you all get too excited though, the scope will be very limited because of the low sample rate we must have. A blog about the msp430 launchpad from texas instruments for both beginners and experts. Several host launchpad software examples are also provided for use with the boostxlcapkeypaddemo project. An example showing how to use the hardware uart on the msp430g2553 to transmit and receive characters between a terminal on the computer and the msp430 launchpad over the usb connection.
Getting started with mspexp430g2 ti launchpad board ti. In the case of this boosterpack, these software examples run on the msp430fr2522 device that exists on the boostxlcapkeypad itself. Im assuming youre using the uart pins directly from the msp430 and not the on board uart to usb bridge. The msp430 launchpad from texas instruments is a microcontroller development platform that can be used by engineers to program the msp430 series microcontrollers. Each msp430 launchpad comes with its own flash emulation hardware as well as the mcu itself, and thus it can be used as a programmer independent of the rest of the mcu circuitry. When using software uart, rx and tx are reversed compared to the hardware uart. The transmit function is based off of the example code provided by ti with the launchpad. Connect the launchpad to your computer and open up your hardware manager if using windows.
The goal of the implementation is to deploy the msp430 value line devices that have less than two serial interface modules as the bridge between the bsl scripter software tool and the msp430. The energia ide is cross platform and supported on mac os, windows, and linux. The launchpad board doesnt have a dedicated uart connection. The peripheral is designed in such a way that it can handle multiple serial communication formats,synchronous as well as asynchronous like spi,i2c,irda, uart etc. Audio capacitive touch boosterpack msp430 software texas. The msp430 launchpad should be connected to the pc via usb.
Right click on the msp430 application uart and click on the update driver software option as shown below. Half duplex software uart on the launchpad before i get into this post, i want to let you all know that the very basic oscilloscope project is coming. You should see that the msp430 enumerates as the msp430. These are the same connections as those used in the previous msp430 examples such as indy module with msp430 usb uart bridge and indy module with msp430 irilt host and usb uart printf. Since we are, you will need to rotate the jumpers 90 degrees as shown on the silkscreen. Please note that it is impossible to easily set up the usi module to receive uart data, and i will never write code to do so.
Texas instruments allows us to program their microcontrollers through a variety of environments. Ti also offers target development boards across the family to program and debug the msp430 mcu insystem through the jtag interface or the spy biwire 2wire jtag protocol. The indy module development board should be powered. Msp430 launchpad serial on windows with usb3 msp low. In this example sending an r or g will turn the red and green leds on and sending an r. In this example we will interface the msp430 launchpad with a pclaptop. You can now use arduino sketches to program your ti launchpad msp430. The msp430g2553 offers a usci interface that is capable of communicating through uart at up to 2 mbaud, but to be aligned with all the other msp430g2xx devices, the demo uses the timer uart implementation, which can. One of which, the msp430g2231 is preloaded with demo functionality demonstrating its on chip peripherals such at 10bit adc and 16. Ive been using msp430 launchpads with students in a course for a few years. The msp430 launchpad board comes with an integrated usbto uart adapter that supports baud rates up to 9600. An introduction to the value line series of products. It can be used for target chip in socket, for external chip, or for any other not msp430 related device where uart 3. Interfacing msp430 uart with the real world after you have managed to successfully communicate with the launchpad, its time to interface the launchpad to external devices like a pc,gsm modem or a gps module which supports a uart.
Getting started with mspexp430g2 ti launchpad board. Also, to use uart on the msp430 rotate both jumpers connecting tx and rx so that theyre parallel with the writing on the launchpad board. It is an easy way to start developing on the msp430 mcus, with onboard emulation for programming and debugging as well as buttons and leds for a simple user interface. The ti launchpad msp430 is a microprocessor development board fr. Dec 08, 2018 msp430 launchpad is a hardware development tool for msp430 value line series of microcontrollers and is popular among hobbyist for its low cost and features. Getting started with the msp430g2553 launchpad part 7. Note that this isnt a limitation of the msp430 uart interface itself.
Select the msp430 usb1 as the connection, msp430g2553 as the device, and then in the alternate communication box, select uart communication in the dropdown. The video show me programming an arduino mega 2560 and a ti launchpad msp430 with the same arduino sketch. Sending data from msp430 launchpad to computer to be used in. Getting started with the msp430 launchpad sciencedirect. Indy module with msp430 5 iri host and usbuart printf. The demo program we supplied uses a software serial we have a mix of.
Mspexp430g2 launchpad experimenter board users guide. Each msp430 launchpad comes with its own flash emulation hardware as well as the mcu itself, and thus it can be used as a programmer independent of the. Msp430 mcu users guides, application reports, software examples and other. Msp430 launchpad tutorial part 4 uart transmission. For hardware uart via launchpad without having to use the rs232 cable and max232 ic. The code examples downloads are grouped in the following function categories. I have timer b running off the dco, at about 7mhz, but at present im not trimming it. How does this capacitive touch software differ from the msp430 capacitive touch boosterpack. Open source projects msp430 texas instruments wiki. In many launchpads, these devices limit the baud rate to 9600 baud. Ti launchpad getting started with msp exp430g2 ti launchpad board.
The launchpad is a lowcost microcontroller board that is made by texas instruments. The launchpad has an option to route the uart pins depending on if you are using the usci peripheral. Serial communication between msp430 launchpad and pc. Msp430 launchpad provides 2 msp430 value line microcontrollers. Getting started with msp430 using code composer studio. How on the msp430 does one enable tx interrupts on the uart and have it ever get into the isr again. You should see that the msp430 enumerates as the msp430 application uart. Apr 02, 2012 this is useful for doing insystem programming without having to swap the target chip in and out of the launchpad. This is useful for doing insystem programming without having to swap the target chip in and out of the launchpad.
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