LPC2148 with xbee in api mode

Wireless & IoT
1

Hello All,

I started to work on lpc2148 with xbee series 2.

On the transmitting side i am using lpc2148 with xbee coordinator in API mode,

and Rx side i am using xbee on Shield in router AT mode.

I want XBee to activate a D3 pin, which could be used to turn on relay on Rx side

API frame format as below code using c program .

#define Delimeter 0x7E

oid Init_UART1(void) //This function setups UART1

{

unsigned int Baud16;

U1LCR = 0x83; // DLAB = 1

Baud16 = (Fpclk / 16) / UART_BPS;

U1DLM = Baud16 / 256;

U1DLL = Baud16 % 256;

U1LCR = 0x03;

}

void main() {

Init_UART1();

LED1_ON();

setRemoteState(0x5);//AD3 config DOUT HIGH

Delay(25);

LED1_OFF();

setRemoteState(0x4);//AD3 config DOUT LOW

Delay(25);

void setRemoteState (char value) {

UART1_Write(Delimeter);//start byte

UART1_Write(0);//high part of length

UART1_Write(0X10);//low part of length

UART1_Write(0X17);//remote AT command

UART1_Write(0X0);//frame id 0 for no reply

UART1_Write(0X0);

UART1_Write(0X0);

UART1_Write(0X0);

UART1_Write(0X0);

UART1_Write(0X0);

UART1_Write(0X0);

UART1_Write(0XFF);// broadcast

UART1_Write(0XFF);// broadcast

UART1_Write(0XFF);

UART1_Write(0XFE);

UART1_Write(0X02);//apply changes immediately on remote

UART1_Write(‘D’);//writing on AD3 pin

UART1_Write(‘3’);

UART1_Write(value);

sum = 0x17 + 0xFF + 0xFF + 0xFF + 0xFE + 0x02 + ‘D’ + ‘3’ + value;

UART1_Write(0xFF - (0xFF & sum));//checksum

Delay(25);

}

}

i am not able to get any communication or data on my Rx side. D3 pinout volage is still low.

Please guide on this point…

This program is working fine with arduino using Serial.write Function.

Regards,

Vijay

2

Series 2 XBee’s are ZIgbee-only (unlike Series 1).

I suggest you use as an example the Arduino library which supports both Series 1 and 2.

It’s much simpler with Series 1.

As a first step, have you connected the microprocessor’s UART TX, RX together and proved you can do loop-back?