Re:CC2545 AHDSP

Hi all,

Thank you for giving reply.

AHDSP means "AUTONOMOUS HIGH DENSITY STREAMING PROTOCOL".

Regards,

N.vamsi

Hi Dear,

Thank you for your reply.

We have following Query's  regarding CC2545 Chip.

1.What are the possible ways of pairing that can be achieved using these CC2545 chips. [i.e like 1. one to one only   2. One transmit can send data to multiple receivers etc..]

2.In our application we simply need to transfer the Data from one transmitter to multiple receivers. Is it possible to achieve this fashion using CC2545 or not?

3.If above fashion is possible then let us consider i have 4 CC2545 Chips. Among them I configured 1 Chip as transmitter and remaining 3 as receivers then Kindly mention the parameters i need to configure in those modules[Like Whether ID's should be same for all modules or not etc..].

4.In this case how the time slot allocation will be done to 4 modules in real time sense[Means Will it be 1st minute of every one hour or First second of every minute etc..].

Kindly respond as early as possible.

Regards,

N.vamsi.

Dear Sir,

1.Could you please share the Code for Point to point Communication. Also kindly provide the Software or any other documentation available regarding the Point to Point Communication[regarding "process of initiation and establishment of communication" etc..]. 

Regards,

Manikanta.K

Manikanta, 

The code is already released on the web.

Regards,
/TA

Hi sir,

Thank you for your earlier reply,

Kindly provide the solution for the following query sir:

1 .Could you provide the brief explanation regarding how the communication(Process) established between two devices (point to point communication).

2.As per your application report are the terms Frame length, Time slot are configurable are not? [Which basically depends on the number of devices going to be used in the particular application]. Here the main intention is to know up to what time period a particular chip can transmit the data in its own time slot.

3.In TDMA let us consider there are 4 modules. In those 2 are configured as Receivers and 2  as transmitters. Now is there any Fixed pattern of Time slot and frequency allocation like after allocation of some 7 time slots(as indicated in page no 3 in application report) only in a particular frequency[say 2402 MHZ] the next frequency[say 2403 MHZ] should be allocated or not.

If not Kindly provide information regarding the Pattern in which time slot and frequency will be allocated for the 4 CC2545 Chips in above application.

Regards,

Manikanta.K

Hi Sir,

1.I mean that Brief explanation  means what are the steps we have to follow for the configuration of a module as Transmitter and receiver? and In what pattern time slots and frequency slots are allocated for those module.

Awaiting for your Reply,

----------------------------------

Manikanta.K

Hi Sir,

1.I mean that Brief explanation  means what are the steps we have to follow for the configuration of a module as Transmitter and receiver? and In what pattern time slots and frequency slots are allocated for those module.

2.If any stack is available to download  into CC2545?please share the stack sir.

Awaiting for your Reply,

----------------------------------

Manikanta.K

Manikanta, 

In the zip file on our website (swra433.zip) there is a small excel spreadsheet that helps you calculate what is possible.

you type in values into the 5 (highlighted in orange) fields and then it will tell you in the configuration is possible.

Then you type into the main c file (see below) the configuration that you need.

Regards,
/TA

/******************************************************************************
* System configurations
*
* This sections defines the starting conditions of the TDMA code. In a final
* product one could implement a system in which the settings are transmitted to
* the product using a bootup process, but to keep things simple here we have
* decided to demo using a fixed starting condition.
*
* The code first jumps into Loopback mode where you can demostrate the sending
* UART data back and forth, this automatically times out and the code continues
* into the "Auto start settings" as defines in the define. This is controled by:
*
* cRfState = STATE_LOOPBACK;
* cRfState_auto = STATE_INIT_RX; // initial state of statemachine
*
* The next setting is the start and stop frequencies the software is allowed to
* operate accross, this is usefull for passing regiounal regulatory requirements
*
* cRfFreqStart = 23; // 2379+Fword (2379+23) = 2402
* cRfFreqStop = 103; // 2379+Fword (2379+23) = 2482
*
* The base datarate of the system can be changed. Carefull considderation should
* be taken as this influences many system aspects at the same time. The most
* important one is adjacent channel intefererence.
*
* cRfMod = MSK_500kbps; // see table below for options
*
* GFSK_250kbps_160khz, GFSK_1Mbps_160khz, GFSK_1Mbps_250khz, GFSK_2Mbps_320khz,
* GFSK_2Mbps_500khz, MSK_250kbps, MSK_500kbps
*
* This variable defines the Frametime in milliseconds, this is the time allocated
* to cycling thru the entire table of concurrent users (cRfNusers)
*
* cRfFtime = 50; // Frametime in milliseconds (1-65535)
*
* The number of concurrent users that can be allocated on a single channel, this
* defines the number of TDMA time slots used in the system.
*
* cRfNusers = 8; // Number of timeslots per frame (1-16)
*
* The defines the Unique 32 BIT ID for each of the pair of nodes that need to
* find each other and commmunicate.
*
* cRfid[4] = {0x12, 0x34, 0x56, 0x78}; // 32 bit ID
*
* The variable defines the amount of payload the system will carry in each direction.
* The upper limit is defined by the FIFO depth minus the system overhead. (128-13=115)
*
* cRfForwardlength = 32; // amount of payload in forward link
* cRfReverselength = 32; // amount of payload in reverse link
*
* The variable is meant to be able to set the maximum power of the each of the nodes
* this has not been implemented fully.
*
* cRfPower = 20; // 20dBm output is maximum down to 0
*
* Timer resolution, this sets the resolution of the timer.
*
* cRfTimerRes = 10; // 10 => 1000/10 = 100us resolution
*
******************************************************************************/
unsigned char cRfState = STATE_LOOPBACK; // initial state of statemachine
unsigned char cRfState_auto = STATE_INIT_TX; // initial state of statemachine
unsigned char cRfFreqStart = 23; // 2379+Fword (2379+23) = 2402
unsigned char cRfFreqStop = 103; // 2379+Fword (2379+23) = 2482
unsigned char cRfMod = MSK_500kbps; // see above table
unsigned int cRfFtime = 50; // Frametime in milliseconds (1-65535)
unsigned char cRfNusers = 8; // Number of timeslots per frame (1-16)
unsigned char cRfid[4] = {0x12, 0x34, 0x56, 0x78}; // 32 bit ID
unsigned char cRfForwardlength = 32; // amount of payload in forward link
unsigned char cRfReverselength = 32; // amount of payload in reverse link
unsigned char cRfPower = 20; // 20dBm output is maximum down to 0.
unsigned char cRfTimerRes = 10; // 10 => 1000us/10 = 100us resolution

Hi sir,

Thank you sir for your earlier reply,

Kindly provide the solution for the following query.

1.By keeping loop back state is it mandatory to keep the initial state as RX.?

2.I had  2 CC2545 Chip I want to keep one as Transmitter and other as Receiver the above configurations are sufficient to the 2 chips or not?

3.Another one was Antenna Selection?Could you please provide the process for Antenna Selection?

4.For this CC2545 which Antenna was Preferable ?

5.Actually In the zip file (swra433.zip) in web site,there was a one example code usb_tdma_trx_130718 .

It was CC2544 Chip Based example.

Is there any stack is readily available for CC2545 chip?like( Z-stack for CC2538)   (or) Example Code for CC2545 Chip for basic testing is RF link was establishing between two devices  or not?

Regards,

Manikanta.K 

Hi sir,

Thank you for your earlier reply.

1.By removing the USB part in existing code ,we can use it for basic testing of RF link between two devices or not?

Regards,

Manikanta.k

Hi sir,

Thank you sir for your earlier reply.

1.Could you please share the schematic regarding Interfacing Antenna Circuit to this CC2545 Chip if there is possible?

2.Kindly share the tools like Code loading and Sniffer tool and Sensing commands manually through Exes like Radiocrafts.

3.Prefer the On-chip antenna for this CC2545 Chip sir?

Regards,

Manikanta.K

Manikanta, 

1) I used IAR () for code development and debug

2) Sniifer tools I used 

3) This depends on what your system requirements are, I suggest starting by copying when we did, which was a PCB antenna and then if it does not have enough performance or the size is not right then contact a chip antenna manufacture to help you select the right antenna for your needs. We have good selection guide here :

Regards,
/TA 

Hi sir,

Thank you for your earlier reply..

1.could you please provide the detailed explanation about code loading process.

Regards,

Manikanta. K

Hi Sir,

1.We can use CC2592 Power extender to this CC2545 Chip or not?

2.If it is possible could you please explain it sir?

Regards,

Manikanta.K

Hii sir,

Thank you for your earlier reply.

Kindly provide the solution for the following query:

1)I had the 2 cc2545 devices I want to establish the communication between those two devices.could you please provide the example code for test the RF link between those two devices.(like one device as transmitter and other was receiver).

Awaiting for your reply,

Regards,

Manikanta.k

Hi sir,

Thank you for your earlier reply.

What do you mean that PER test?

Regards

Manikanta. K

Look under the SW folder or try this link

Hi sir,

Thank you for your earlier reply.

I found the hex files for cc254x series for per test.

I had already the 2 pcb boards with cc2545 and cc 2592 power extender. Now could you please share what the process I follow

To do this per test.

Regards

Manikanta. K

Hi sir,

Thank you for your earlier reply,

1.I think it was useful to do the PER test for CC2545 evaluation modules. But i need to test the CC2545 Chips. For that I designed the board for CC2545 Chip with

CC2592power extender. Is any ready stack is available to load into the cc2545 Chip and to test it.(like one as transmitter and one as receiver).If it is available, kindly

share those files sir.

Regards,

Manikanta.k

Hi Sir,

Thank you for your earlier reply.

1.Could you give confirmation to me sir,Now I have to add the controlling of power extender code to the PER test code.With this I can do the testing.

2.For confirmation Iam saying my requirement once again sir.

I want to test the RF link between two cc2545 chips.For this I designed the hardware with cc2592 power extender.I want to check one as transmitter and receiver .Is receiver receives the data from transmitter or not sir?

Could you please give guidelines as in the direction of firmware sir.(Like code for Transmitter and receiver )

Regards,

Manikanta.K

Hi sir,

Kindly provide the solution for the following query sir:

1)Previously I was discussed with you regarding the I designed a PCB with CC2545 chip and CC2592 Power extender. For basic RF link testing you said that choose Smart RF studio tool. please observe the following PIC. IN RF parameters section there is no choice for selection of range extender .It is available for CC2530 device. Is smart RF studio will work or not when CC2592 mount with CC2545 ?

2)Could you please provide the example code for the CC2545 chip to do the basic RF link test between two devices rather than which was available in the ti site.

the code available in the swra433 zip file was cc2544 device.so please send the code other than that.

Awaiting for your Reply,

Regards,

Manikanta.K

Manikanta, 

The only example code we have is what CHS provided a link to in the the first reply at the top of this conversation. We have no other software available for you and we are not planning on making any more examples.

Regards,
/TA

Hi sir,

Thank you for your quick response sir.

I was asked for just information.

Regards,

Manikanta.K

Hi sir,

Kindly provide the solution for the following query sir:

1)I was connected control signals of  Power extender cc2592  to cc2545 as follows:

PA_EN to P0_1

LNA_EN to P0_0

HGM to P2_0

with this connections  I can do the basic RF link test with smart RF studio or not?

Regards,

Manikanta.K

Thank you sir for your earlier reply.

1.we can connect the control signals of CC2592 power extender to the any 3 GPIO pins of CC2545. or not?

2.In device control panel of CC2545 there is no choice for range extender.Still I can do the test or not?

3.Could you please share the document regarding algorithm or flowchart of PER test code for step by step process and initialization purpose.

Regards,

Manikanta.K

T2) yes, but you have to set the IO pins manually in the register view on the right side of the device panel, see the user guide for which pins and reg settings

3) Set the control signals for the CC2592 according to the state of the CC2545 (RX/TX/ power down) and it works.

Good luck. 

Hi sir,

Kindly provide the solution for the following query:

1.Could you please explain how the communication establishment between cc2545 chips an how the CC2545 chip behaves in the following cases :

A)Point to point communication(one as transmitter and one as receiver)

B)In this case there are 3 cc2545 chips, one was receiver and two are  transmitters.(many to one communication)

C)In this case there are 3 cc2545 chips, one was transmitter and two are receivers.(one to many communication)

please provide the Step by step process and brief explanation for the above cases.

Awaiting for your reply,

Manikanta.K

Hi sir,

To clear my ambiguities  I was asked how the cc2545 behaves or communication process steps(means data travel path) in the 3 types of communications.

if it is available please post the answer sir. or not.

else provide the data travel path for point to point communication(2 devices 1 was transmitter and 2 was receiver) if we interface the power amplifier to the cc2545 chip.

Thank you for your cooperation up to now.

Regards,

Manikanta.k