CC2564 with LM4F232

Richin Abraham

Other Parts Discussed in Thread: CC2564, CC256XM4BTBLESW

Hi,

I am trying to integrate cc2564 with lm4f232 evaluation board. I want to send a string or a value from my lm4f232 to an android phone(blueterm app). i dont need any other functionality. Any phone should be able to find my lm4f232 and pair with it and get the data. The data is sent based on event like button press.

Can anyone suggest me from which code I should start for my project.

I have downloaded the Bluetopia stack for stellaris/tiva and have CCS v5.2 and CCS v6.0.

(I dont know if I am right but SPPDemo seems useful as I can use the Server setting for my code but other functions seems irrelevant. If anyone knows which all functions are necessary for establishing a connection and sending and receiving data, please help me.)

over 9 years ago

0 Sundeep Javvaji over 9 years ago

TI__Mastermind 32615 points

Hi,

Yes you can use SPP demo from the Tiva C release V1.1 from here http://www.ti.com/tool/stonestreetone-bt-sdk
Please see the documentation folder "\CC256x M4 Bluetopia SDK\v1.1\Documentation" as part of the SDK.

0 Richin Abraham over 9 years ago in reply to Sundeep Javvaji

Prodigy 190 points

Thank you for your suggestion.

Another problem I am facing is that to connect the CC2564 with LM4F232 there needs to be a Y4 crystal oscillator connected to the LM4f232. Y4 is a 32.768KHz crystal oscillator 4-Pin SMT. I am unable to get any 4 Pin Crystal Oscillator in market but I have 32.768KHz 2-Pin Crystal with me.

Can anyone tell me what is the workaround for this Y4 and if I can use the 2-Pin Crystal, how can i use it?

0 Miguel over 9 years ago in reply to Richin Abraham

TI__Mastermind 23565 points

Richin,

A crystal oscillator is different than a crystal. There are two options here: 1) Use a XTAL OSC and supply the signal clock directly to the CC2564 (see CC2564 EM board) or 2) Use a XTAL connected to the LM4F232 and then output the clock signal thru the RTCCLK pin to the CC2564.

Regards,

Miguel

0 Richin Abraham over 9 years ago in reply to Miguel

Prodigy 190 points

The second suggestion to use the RTCCLK is the best solution I have found till now. But can you tell me how to enable the RTCCLK to set it to output 32.768KHz.

What I know is

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOK);

GPIOPinConfigure(GPIO_PK4_RTCCLK);

GPIOPinTypeGPIOOutput(GPIO_PORTK_BASE, GPIO_PIN_4);

Is this enough to get the exact frequency of 32.768KHz and Voltage of 1.8V?

0 Miguel over 9 years ago in reply to Richin Abraham

TI__Mastermind 23565 points

Hi Richin,

Please look at the CC256XM4BTBLESW examples (http://www.ti.com/tool/stonestreetone-bt-sdk). HW-wise, you just need to make sure the XTAL is 32.768KHz +/-20ppm.

~Miguel

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CC2564 with LM4F232