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Forum Post: Re: Bandwidth of SPI

BrandonElliott

JP, For the MSP430x5xx series, the USCI serial module retains essentially the same functionality and speeds as the previous series MSP430. Per page 16-11 of the 2xx Guide, The maximum bit clock that can be generated in master mode is BRCLK. Link: http://focus.ti.com/lit/ug/slau144e/slau144e.pdf Now...

on Aug 14, 2008
Forum Post: Re: SPI configured with dMAX

TimHarron

Sneha 1) If the peripheral devices only supports 32bits tranfer over SPI and 6727 SPI at max supports 16bits trasnfer, is there any way to have communication between them? (my limitation is the transfer should happen using dMAX) Because the SPI peripherals are only programmable to accept between 2 and...

on Sep 12, 2008
Forum Post: Re: SPI configured with dMAX

Brad Griffis

Why not do this: Assert the chip select Do two 16-bit transfers. De-assert the chip select. From the perspective of the signals, I don't think you could tell the difference. Just make sure to do the transfers in the right order. If the slave is expecting MSB-first, then you would need...

on Sep 13, 2008
Forum Post: problem with SPI

nick836

Hello! I don't know how to pass voltage value converted by SD16 to CC1100 by SPI interface..is there anybody who can help me? Any suggestion will be appreciated thanks

on Sep 15, 2008
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: c6727 SPI slave boot mode problem

Harbour

Hi, Anybody succeeded booting c6727 from SPI host (in SPI slave mode) ? According to spraa69c there are 3 phases : 1. SWS 2. POS 3. OS I'm using ARM board, wich has SPI connected to DSP and RS232 connected to Linux PC, so all data is logged. I see that SWS is passed but POS is stucked in N number...

on Oct 6, 2008
Forum Post: Re: c6727 SPI slave boot mode problem

TimHarron

Hello, There are several Advisories in the C6727B Silicon Errata related to the SPI (slave) peripheral - have you checked into these? Harbour 2. Is there any 16 bit SPI slave boot mode examples available from TI ? Pdf mentioned has only 32 bit flash examples. I believe there are only 32-bit examples...

on Oct 6, 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: Re: c6727 SPI slave boot mode problem

Bernie Thompson TI

This is a rough article you point out, it points out some deficiencies that do exist for the C672x devices that do cause problems though some have gotten better and some can be avoided; TI still strives to support the devices better. What I really wanted to point out here is that if you want the rev...

on Oct 16, 2008
Forum Post: Re: C6727 dMAX for SPI transfer

Gagan Maur

See below some code snippets that may help debug the issue: Step 1: Init /* Call the CSL Init functions */ CSL_chipInit(NULL); CSL_dmaxInit(NULL); Step 2: dMAX Object create /*********************************************************/ /* Allocate the dMAX object for the SPI transfer...

on Oct 22, 2008
Forum Post: Re: CC2480 SPI Logic Analyzer capture for an SREQ command

LPRF Rocks the World

HI Joaquim, You pump out data bit by bit on the edge of the SPI clock from your microcontroller. Please take a look at the low level driver for the SPI communication in the following example code taken from the CC2480 Software Examples (swru169.zip, 256 KB ) 30 Apr 2008 zip From this sample software...

on Oct 22, 2008
Forum Post: problem with spi interface on TMS320DM648 dsp

giuliop

Hi all, I have a Lyrtech EVMDM648 equipped with a TMS320DM648 dsp, and I need to write a SPI interface between the dsp and a SPI EEPROM (ATMEL730 25256A). The board mux settings (not the DSP mux settings) between UART and SPI are surely correct (I had to turn off a dip switch); furthermore, i verified...

on Oct 26, 2008
Forum Post: Re: problem with spi interface on TMS320DM648 dsp

TimHarron

When you OR the value of 0x5 into SPIDAT1 what guarantee do you have that the lower 16 bits are not already 0xFFFF? Note the following from the SPIDAT1 field description on page 29 of the SPI User Guide : When data is read from this field, the value is indeterminate because of the shift operation. The...

on Oct 31, 2008
Forum Post: Re: CC2520DK SW examples problem with reading from CC2520 via SPI interface

Jomar Hønsi

I've just tried it out myself and got the same result as you. I can't explain this off the top of my head but writing top any register or memory location before doing the read seems to fix it. All the following SPI operations behave as expected.

on Nov 4, 2008
Forum Post: TMS320F2812 boot from SPI EEPROM

JamesS

Hi, Our board has a 25LC256 SPI EEPROM, that I believe is functionally equivalent to the Xicor X25256, mentioned as being compatible with the bootROM code in spru095c.pdf. I've rewritten chunks of the example flash API program to write to the SPI EEPROM instead of flash. I can confirm that the...

on Nov 12, 2008
Forum Post: Re: SPI slave boot problems

KarlLunt

Spot on, Adriaan! The SET command does, indeed, require transfer of the four words to the DSP in an order that differs from the order in which they are written to the AIS file. Note that the sample implementation (em_protocol.c) in TI's BootUtils folder does NOT alter the order of the words when...

on Nov 26, 2008
Forum Post: Re: require dm355spi.pdf development document

Bernie Thompson TI

You make a good point, it appears that the driver is accessing reserved locations within the SPIFLG register, the current version of the DM355 SPI manual is SPRUED4b which has these error bits reserved. This is something I will have to look at internally, for now I would use the driver as is.

on Dec 2, 2008
Forum Post: Re: help with cc1100 software

M

Hi nick836, First to clarify the issue with the xtal running or not. The easiest way to check that it is running is to check the output on GDO0 after reset. It's default output is CLK_XOSC/192. To verify that the chip is ready, check GDO2 after reset. GDO2's default output after reset is the...

on Dec 3, 2008
Forum Post: Re: demo programs cannot be run after rebuilding on dm6446

Masaru

Bernie and Juan Thank you very much that I have tested the SD-card to save the mpeg file outputed by the demo encode program as you described above using the compact-flash support uImage I built above. Boot information of mine is as following Palm Chip BK3710 IDE Register Fail elevator: using anticipatory...

on Dec 5, 2008
Forum Post: .out to .hex conversion for DM6431

Eric Fang

Dear Sir, I want to convert the .out file to .hex for burning SPI24 flash rom with 6431. I use the tool in "C:\dvsdk_1_01_00_15\flashburn_files\hexAIS". But the .ini file is for 6437 EVM. I modify the .ini file as following : ; General settings that can be overwritten in the host...

on Feb 5, 2009
Wiki Page: AN025 CC1020 RF Modem

Kjetil

This reference design for an RF modem demonstrates both low-level and protocollevel design using the CC1020 RF transceiver. Software is described in detail, while hardware is based on CC1000 RF Modem and described in AN015. A pair of RF modems function as a wireless replacement of an ordinary RS-232...

on Nov 19, 2010
Wiki Page: AN015 RF Modem Reference Design

Kjetil

This reference design for an RF modem demonstrates both low-level and protocollevel design using the CC1000 RF transceiver. Software and hardware are described in detail a pair of RF modems function as a wireless replacement for an ordinary RS-232 serial cable. The modem will function with equipment...

on Nov 19, 2010
Wiki Page: Strobe command SPI timing for CC110x/CC1150/CC2500/CC2550

Kjetil

Q: FAQ: Strobe command SPI timing for CC110x/CC1150/CC2500/CC2550 by 611949 A Strobe command can be issued immediately after the preceeding Strobe command, provided that the preceeding Strobe command has been completely transfered over the SPI interface. However, note that for SPI clock speed above...

on Nov 22, 2010
Forum Post: McBSP-SPI interface of C5510-MSP430

sunil sharma

Hello everyone, I am undertaking interface of 04 nos C5510(McBSP) and MSP430(SPI ) with MSP430 as SPI master and the DSP as slave. FSX receives CS/SS(active low) from MSP430 and other pins are connected as required Configured McBSP for Clock stop mode I have some queries regarding the...

on Aug 26, 2011
Wiki Page: DN113 CC111xFx CC243xFx CC251xFx SPI Interface

Glenn B

This design note describes how to use the SPI peripheral for the Texas Instruments Low Power RF SoCs. http://www.ti.com/lit/swra223

on Feb 24, 2012