CCS/CC1200EMK-420-470: GPIO2 pin Configuration

Saber Kazeminasab

Expert 1080 points

Part Number: CC1200EMK-420-470
Other Parts Discussed in Thread: MSP430G2553

Tool/software: Code Composer Studio

Hello

I am using CC1200EM for data transmission. In Smart RF Studio, the register export creates a register named

CC120X_IOCFG2 0x06;

This register configures the GPIO2 on the EM.

What is the role of GPIO2 in the data transmission as in the user's guide, it is mentioned that the micro-controller interface is with 4 wire SPI?

Thanks

Saber

over 5 years ago

0 FI over 5 years ago

TI__Mastermind 20580 points

Hi,

Please see this for help:

https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz/f/156/p/696135/2566127

you can download the example software project to see how the pin is configured. I believe that particular pin is configured for RX interrupt to the MCU.

Regards,

0 TER over 5 years ago in reply to FI

TI__Guru**** 317180 points

See table 10 in the userguide for the meaning of this GPIO setting.

0 Saber Kazeminasab over 5 years ago in reply to TER

Expert 1080 points

Thanks for your reply. In the Smart RF Studio, the register exported for the GPIO pin is as follows:

CC120X_IOCFG2, 0x06;

And I have a GPIO2 pin on the P2.2 and I have activated the GPIO interrupt on this pin (P2IE |= BIT2) on the falling edge (P2IES |= BIT2)(I am using MSP430G2553). In the code, after writing the packet to the TXFIFO and strobe STX to send it, the code waits for an interrupt on this pin (P2.2), then repeats the write/strobe to STX action again. Is it the right procedure I am taking?

When I run the program, it is trapped in the wait for the interrupt. It seems, the P2.2 doesn't receive interrupt. Any ideas how to solve the problem?

Thanks

0 FI over 5 years ago in reply to Saber Kazeminasab

TI__Mastermind 20580 points

Hi,

Can you share your code here?

I use the following to configure interrupt on MSP430G's P2.2 pin from GDO0 pin.

P2IE |= 0x04; // P1.4 interrupt enabled
P2IES |= 0x04; // P1.4 Hi/lo edge
P2IFG &= ~0x04; // P1.4 IFG cleared

callback as follows:

#pragma vector=PORT2_VECTOR
__interrupt void port2_ISR(void)
{

// set packet semaphore
packetSemaphore = ISR_ACTION_REQUIRED;
P2IFG &= ~0x04; // P1.4 IFG cleared
}

Sub-1 GHz

Sub-1 GHz forum

CCS/CC1200EMK-420-470: GPIO2 pin Configuration