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I2C
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  • Forum Post: I2C Pull-up resistor influence on (Shared) SPI bus ?

    matianfu
    In our design, we use USCI0 Channel B on MSP430F24x connect to both CC2420 (SPI mode) and I2C/1-Wire bridge (DS2482-101, I2C mode), though at one time, only one mode is used (both cc2420 and ds2482 could be shutdown by GPIO). In DS2482 reference design, two pull-up resistors connects SDA/SCL to DVCC...
    on Oct 4, 2008

  • Forum Post: Re: Interface

    Raffaele Tegas
    Hi, generally I2C is a good and simple choice. Regards, Raffaele
    on Oct 14, 2008

  • Forum Post: Re: Interface

    Tim Love
    There are several communications ports you could use: I2C, SPI, SCI. There are examples for all of these communication ports for both C2000 and MSP430 at the following links: http://focus.ti.com/mcu/docs/mcuflashtools.tsp?sectionId=95&tabId=1538&familyId=342 http://focus.ti.com/mcu/docs/mcuflashtools...
    on Oct 14, 2008

  • Forum Post: I2C

    pbk
    Hello. Is there any good primer or user guide that can give me enough insight on how the I2C peripheral works? I have read the complete documentation many times and looked to several examples, but still some of the information is confusing. For example, sometimes when I configure the module as a...
    on Oct 19, 2008

  • Forum Post: Re: I2C

    Tim Love
    The only documentation regarding the I2C is the reference guide at the following link: http://focus.ti.com/general/docs/techdocsabstract.tsp?abstractName=spru721a Besides this you can perform a Google search for I2C and find several tutorials for the peripheral. One good link for learning about I2C...
    on Oct 22, 2008

  • Forum Post: MSP430 I2C communication

    1074316
    Hi, Has anyone tried I2C communication with MSP430 and bq27500(fuel guage), http://focus.ti.com/docs/toolsw/folders/print/bq27500evm.html I tried using the USCI I2C Master program from the below link, http://focus.ti.com/lit/an/slaa382/slaa382.pdf I have set the I2C address of bq27500 as 0xAA...
    on Nov 11, 2008

  • Forum Post: F28335 I2C Boot Example

    Tim Love
    Team, A customer of mine is looking for a ready made example that can boot from the I2C of the F28335 eZdsp. Before developing an example I was curious if anyone has an example readily available. Does anyone have one they could share? Regards, Tim Love
    on Dec 2, 2008

  • Forum Post: RF2500T and i2c

    abendig
    Hello, i have a RF2500 kit and i want connect a MCU with i2c to my target board. Can I do this? I know that the msp and cc2500 is communicated over the SPI Port and the SPI Port is sharing his pin with i2c. Can i switch SPI with I2C during the program is running? Regards ABendig
    on Dec 15, 2008

  • Forum Post: Re: RF2500T and i2c

    abendig
    Thank you Brandon for this hint. The solution with software i2c is what i'm looking for. abendig
    on Dec 17, 2008

  • Forum Post: Re: RF2500T and i2c

    abendig
    Thank you Brandon for this hint. The solution with software i2c is what i'm looking for. abendig
    on Dec 17, 2008

  • Forum Post: Re: I2C

    BrandonAzbell
    Would you provide the specific device you are targeting and the source of the code examples you are using? There should be a literature number associated with the code examples. Secondly, if you could post your example code, that would help as well.
    on Jan 25, 2009

  • Forum Post: Trouble with I2C interface

    SAP
    Dear all, I'm on a firmware design for new system based on TMS320F28335 DSP. I have utilised the I2C bus for interfacing six port expander IC's and one RTC chip with main DSP. In my I2C driver, when I try to communicate, only address byte is seen on data lines. The signal starts with a start...
    on Feb 2, 2009

  • Forum Post: Re: I2C Examples

    Tim Love
    Gaston, There is an app note available that specifically discusses I2C Master and Slave modes. Examples codes are provided as well. This is the Configuring the TMS320F280x DSP as an I2C Processor (SPRAAN8) application note. The document and software is available at the following link: http:/...
    on Feb 12, 2009

  • Forum Post: PCA9534A[Port expander] interfaced with TMS320F28335 -- Issue

    SAP
    hi Folkz, We are using the PCA9534A port expander interfaced with the TMS320F28335 . We could write to the port expander and test it (writing values to the Output Port Register. and checking the status of the port in CRO) But we are unable to read the data from the PCA9534A[:(] . Is their any one...
    on Feb 14, 2009

  • Forum Post: Re: PCA9534A[Port expander] interfaced with TMS320F28335 -- Issue

    BrandonAzbell
    I don't have any sample code to share, unfortunately, but I think we can get this figured out fairly quickly. Would you describe the I2C transaction that you are implementing when writing to the output port register of the PCA9534A? I suspect it is just one large series of consecutive writes...
    on Feb 14, 2009

  • Forum Post: Re: I2C

    BrandonElliott
    Yogi, I would like to clarify one point that you said: the register is an 8-bit register, and when we put a 7-bit value into an 8-bit register it gets justified in a specific way, but not all manufacturers or users may expect it to get justified the other way. Have you tried to simply shift the address...
    on Mar 2, 2009

  • Forum Post: i2c program

    Gaston_Melo_Arg
    hi, I modify the i2c_eeprom to make a connection between dsp and msp430, i cant see anything in the osciloscope: #include "DSP2833x_Device.h" #include "DSP2833x_Examples.h" void I2C_Inicializacion(void); Uint16 I2C_EscrituraDatos(struct I2CMSG *msg); interrupt void...
    on Mar 10, 2009

  • Forum Post: Source code for MSP430F169 I2C

    Mike McCormack
    Is there a source code example for using the I2C interface on the 169 that is CCEssentials based?
    on Mar 30, 2009

  • Forum Post: Re: i2c program

    BrandonAzbell
    Have you been able to make any progress on this issue?
    on Mar 31, 2009

  • Forum Post: Re: i2c program

    Gaston_Melo_Arg
    No, right now i`m try to do it using simulink,the dsp is not responding to the msp430, the msp430 send the slave address, i see in the oscilloscope the clock and data lines been generate, but the dsp not respond. Did you use simulink to do some connection of this type? I will try to use spi to do...
    on Mar 31, 2009

  • Forum Post: Re: i2c program

    BrandonAzbell
    Gaston No, right now i`m try to do it using simulink,the dsp is not responding to the msp430, the msp430 send the slave address, i see in the oscilloscope the clock and data lines been generate, but the dsp not respond. Just so that I am clear, in your TMS320F28335 to MSP430 setup, the MSP430 is...
    on Mar 31, 2009

  • Forum Post: Re: i2c program

    Gaston_Melo_Arg
    thanks anyway i did it with simulink and works great. Thanks for replay. Gaston
    on Apr 1, 2009

  • Forum Post: Re: Trouble with I2C interface on TMS320F28335

    Bob10478
    I find that the problem seems to be related to the FIFO TX buffer size TXFFST register. On first transmission it is still empty, however when transmitting again (now buffer size 14) the buffer reaches it's maximum size of 16 and seemingly will not take on any more data after the address is bytes...
    on Apr 14, 2009

  • Forum Post: Re: On borad programming with MSP430

    BrandonAzbell
    Chikku Actually our application uses two controllers.One being the MSP430, and these two are connected with I2C. We want to program the other controller(3V) on board with all the connection as it is (I mean the MSP430 I2C port is also connected). Is there any possiblity that MSP430 port goes wrong...
    on Apr 22, 2009

  • Forum Post: Re: On borad programming with MSP430

    Chikku
    Yes the programming interface for the other controller is the same I2C interface that connects to the MSP430 and MSP430 is the master for I2C communication. Since both the devices are powered from the same supply present on the board, I am thinking of keeping MSP430 in reset condition(Pulling RST pin...
    on Apr 23, 2009
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