This demo connects two msp430s via the i2c bus and uart. The video show me programming an arduino mega 2560 and a ti launchpad msp430 with the same arduino sketch. 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. I2c, spi, uart data communications on the raspberry pi. Thorough documentation is delivered through a helpful api guide, which includes details on each function call and the recognized parameters. Here is the launchpad datasheet and user guide and the itg3200 datasheet. Please note that it is impossible to easily set up the usi module to receive uart data, and i. When using the hardware i2c wire library with scl on p1. What would be the best way to communicate with my 3 slaves msp430 and the pc. Im looking for sample code to service the usci uart on an msp430 via dma not interrupts. After deliberation it was decided to use uart0 by re configuring from. A collection of c libraries for the ti msp430 family of microcontrollers. Using the uart interface of the msp430 devices visualgdb.
The main focus in the msp430 devices is the ultralowpower consumption. Therefore, to add any i2c serial device in a project based on this mcu, you have. Contribute to sourceperlrt development by creating an account on github. If the device you are connecting to does not already have pullups, you need to supply external pullup resistors between p1. Revised for new firmware gt800x480ac903pa f120b and gt480x272ac903pa f125b and compatibility. Open source projects msp430 texas instruments wiki. Msp430 driver library is a simple api that makes it easy to talk to your msp430 5 series and 6 series devices. The s options sets the frequency of the clock when performing the spi communication. For more information visit the msp debug stack wiki page. With the i2c protocol, special software can be created to use a pair of simple gpio.
This video shows how to configure uart and i2c with a master msp430 and several msp430 slaves msp430g2553. In msp430, serial communication is handled by an on chip peripheral called usci universal serial communications interface. So far, ive been able to write and read in and from an rtc pcf8563t and an eeprom 24xx256 as slaves. This folder contains a uart driver that allows simple configuration and use of the uart of an msp430. Fullduplex, serial data transmission used for short. 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. Note that while many driver library apis are shared between msp430 and msp432, there are a few underlying differences between the two architectures. Refer to this calculator for help on calculating values for the parameters modified bits are ucpen, ucpar, ucmsb, uc7bit, ucspb, ucmodex, ucsync bits of ucaxctl0 and ucsselx, ucswrst bits of ucaxctl1. I noticed that the more uart a msp430 contains is 2 msp430f2619 or others. Support for other serial protocols, such as i2c and uart is planned in future releases. Also, to use uart on the msp430 rotate both jumpers connecting tx.
Browse other questions tagged uart msp430 or ask your own question. Note that if you have not used the adapter before, the drivers wont be installed. The msp430 provides a module called the usci universal serial communications interface which supports multiple types of serial interfaces. The msp430 board led1 will blink 3 times upon recognition of the spi clock. Each work great separately, but when i initialize both of them, the uart cannot receive any data. Interrupts, for example, are a bit difference on msp432 compared to msp430 due to integration with. Fortunately, the msp430 launchpad has a serial to usb converter built right onto. Usb connectivity using msp430 and tusb3410 texas instruments. Msp430 is a family of microcontrollers designed and manufactured by texas instruments. Stack overflow for teams is a private, secure spot for you and your coworkers to find and share information. Competitive prices from the leading 16 32 bit microcontrollers mcu msp430 distributor. There is a huge portfolio of these 16bit risc core devices different peripherals. This library implements the i2c, spi and uart interfaces to communicate with the gtcp modules.
My msp430f2272 is talking to an eeprom through i2c and also to another device through uart9600. This driver package contains all necessary lowlevel usb drivers for msp430 usb debugging tools fets. But when ive wanted to add uart functions the i2c stops working. The msp430 driver library is a high level, easytouse, abstracted programming interface, which provides simple function calls to enable, configure, and use various msp430 peripherals. Configuring and using the msp430 uart gustavo litovsky. Resolved i2c with uart msp lowpower microcontroller. After this initial sequence, when you spi data hello world\n to the msp430 it will turn on the led1 light. Library of peripheral drivers, component drivers, utilities, and more.
Serial communication between msp430 launchpad and pc. Some of these chips, though, dont have native spi or. In the timer code, if the received byte is validated and shown to have no errors, it not only sets the hasreceived flag but also forces the cpu to leave the low power mode, which lets the main loop run and react to the received value. There are two variants of the usci module each of which support specific interfaces. Uart serial communication with msp430 microcontroller.
The msp430 line offers two types of analogtodigital conversion adc. Both the leds red and green light up as soon as the board is powered on. This peripheral driver librarys intent is to allow application development at an api level instead at the device register level. Competitive prices from the leading msp430 family msp430frxx series microcontrollers 16 32 bit microcontrollers mcu msp430 distributor. Data transfer controllers and a 16 word conversionandcontrol buffer allow the msp430 to convert and store samples without cpu intervention, minimizing power consumption. While they are not drivers in the pure operating system sense that is, they do not have a common interface and do not connect into a global device driver infrastructure, they do provide a mechanism that makes it easy to use the devices peripherals. Hot network questions have you heard gokigen naname. Save yourself time and frustration by removing the jumper connecting p1. Initialize i2c to check if slave is present the slave appears fine, and i can continue to transmit. It continuously transmits a single byte of data starting at 0 and incrementing from both uart and i2c. Use arduino code on a ti launchpad msp430 instructables. For this tutorial we want to implement a uart driver with some simple apis which can be used to print a menu and accept user input.
Uctxifg doesnt set again after initiating transmit. Msp430 family msp430frxx series microcontrollers 16 32 bit microcontrollers mcu msp430 at element14. The main msp430 will be connected to a max3223, and then to the computer. If you have an msp430 mcu which does not support hardware uart e.
Msp430 peripheral driver library texas instruments. A lot of data might be sent quickly to the pc, so it will be configured to run at 128000 bps. Driver librarys abstracted api keeps you above the bits and bytes of the msp430 hardware by providing easytouse function calls. I2c, spi and uart are all digital, serial communications methods. Folks, thanks to all for the various ideas and insights about this issue.
On the msp430, the peripheral which implements i2c is the usci module. The msp430 driver library is completely open source and is delivered to customers within the msp430ware software and documentation suite. 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. The msp430 launchpad board comes with an integrated usbtouart adapter that supports baud rates up to 9600. Msp430 family msp430f2x series microcontrollers 16 32. Half duplex, serial data transmission used for shortdistance between boards, modules and peripherals. 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. I have the jumpers turned over for hw uart i have compiled your code in ubuntu and transferred it to the board.
You can now use arduino sketches to program your ti launchpad msp430. Msp430g2553launchpad uart rx example code vault 43oh. The itg3200 uses a repeated start to read from a specific register. The ti launchpad msp430 is a microprocessor development board fr. If you dont see a selectable serial port, you likely have a driver issue. I2c communication with usi module texas instruments wiki. Hi, i have developed a code for an msp430f2254 as master to send and receive data through i2c.
Hello, using software uart can we get the data from gpsmodule to msp430. Configuring and using the msp430 uart january 30, 2011 msp430, software baud, baud rate, ez430, ez430rf2500, msp430, uart, usb glitovsky embedded applications are nowdays rarely completely standalone. Msp430 family msp430f2x series microcontrollers 16 32 bit microcontrollers mcu msp430 product list at newark. Msp430 i2c and uart at the same time from ti forum written. Msp430 family msp430frxx series microcontrollers 16 32. Competitive prices from the leading msp430 family msp430f2x series microcontrollers 16 32 bit microcontrollers mcu msp430 distributor. The usi universal serial interface module which can be found in several msp430 devices can be used either as spi or i2c interface. Open device manager to find out the com port number of the msp430 board. The main loop will go to sleep every iteration unless there is a value which has just been received, in which case the loop will run again. This is a generic msp430 uart driver gustavo litovsky. So this how we can use msp430 microcontroller to receive data from serial uart device.
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