Hope RF RF12B Programming Manual

RF12 Program V1.1

RF12B programming guide

1． Brief description

RF12B is a low cost FSK transceiver IC witch integrated all RF functions in a
single chip. It only need a MCU, a crystal, a decouple capacitor and antenna to
build a hi reliable FSK transceiver system. The operation frequency can cover 400
to 1000MHz.

RF12B supports a command interface to setup frequency, deviation, output power

and also data rate. No need any hardware adjustment when using in frequency-hopping
applications

RF12B can be used in applications such as remote control toys, wireless alarm,

wireless sensor, wireless keyboard/mouse, home-automation and wireless data
collection.

2． Commands

1． Timing diagram

2． Configuration Setting Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 0 0 0 0 0 0 0 el ef b1 b0 x3 x2 x1 x0 8008h

e l: Enable TX register

e f: Enable RX FIFO buffer

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RF12 Program V1.1

b1..b0: select band

b1 b0 band[MHz]
0 0 Reserved
0 1 433
1 0 868
1 1 915

x3..x0: select crystal load capacitor

x3 x2 x1 x0
0 0 0 0 8.5
0 0 0 1 9.0
0 0 1 0 9.5
0 0 1 1 10.0
…… ……

1 1 1 0 15.5
1 1 1 1 16.0

load capacitor [pF]

3． Power Management Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 0 0 0 0 0 1 0 er ebb et es ex eb ew dc 8208h

er： Enable receiver

ebb：Enable base band block
et： Enable transmitter
es： Enable synthesizer
ex： Enable crystal oscillator
eb： Enable low battery detector
ew： Enable wake-up timer

dc： Disable clock output of CLK pin

4． Frequency Setting Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 0 1 0 f11 f10 f9 f8 f7 f6 f5 f4 f3 f2 f1 f0 A680h

f11..f0: Set operation frequency:
433band: Fc=430+F*0.0025 MHz
868band: Fc=860+F*0.0050 MHz
915band: Fc=900+F*0.0075 MHz

Fc is carrier frequency and F is the frequency parameter. 36≤F≤3903

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RF12 Program V1.1

5． Data Rate Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 1 0 0 0 cs r6 r5 r4 r3 r2 r1 r0 C623h

r6..r0: Set data rate:

BR=10000000/29/（R+1）/（1+cs*7）

6． Receiver Control Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 0 P16 d1 d0 i2 i1 i0 g1 g0 r2 r1 r0 9080h

P16: select function of pin16

P16
0

Interrupt input

1 VDI output

i2..i0:select baseband bandwidth

i2 i1 i0 Baseband Bandwidth [kHz]
0 0 0 reserved

0 0 1 400
0 1 0 340
0 1 1 270
1 0 0 200
1 0 1 134

1 1 0 67
1 1 1 reserved

d1..d0: select VDI

d1 d0 Response

0 0 Fast
0 1 Medium
1 0 Slow
1 1 Always on

response time

g1..g0: select LNA gain

g1 g0 LNA gain (dBm)
0 0 0
0 1 -6
1 0 -14
1 1 -20

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RF12 Program V1.1

r2..r0: select DRSSI threshold

r2 r1 r0 RSSIsetth [dBm]
0 0 0 -103
0 0 1 -97
0 1 0 -91
0 1 1 -85
1 0 0 -79
1 0 1 -73
1 1 0 Reserved
1 0 1 Reserved

The actual DRSSI threshold is related to LNA setup:

RSSI

= RSSI

th

setth

+ G

LNA.

7． Data Filter Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 0 0 1 0 al ml 1 s

f2 f1 f0 C22Ch

1

al: Enable clock recovery auto-lock

ml: Enable clock recovery fast mode

s: select data filter type

s Filter type

Digital filter

0

Analog RC filter

1

f1..f0: Set DQD threshold

8． FIFO and Reset Mode Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 1 0 1 0 f3 f2 f1 f0 sp al ff dr CA80h

f3..f0: Set FIFO interrupt level

sp: Select the length of the synchron pattern:

sp Byte1 Byte0 (POR) Synchron Pattern (Byte1+Byte0)
0 2Dh D4h 2DD4h
1 Not used D4h D4h

al: select FIFO fill start condition

al condition
0 Sync-word

1 Always
ff: Enable FIFO fill
dr： Disable hi sensitivity reset mode

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RF12 Program V1.1

9． Synchron pattern Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 1 1 1 0 b7 b6 b5 b4 b3 b2 b1 b0 CED4h

This command is used to reprogram the synchronic pattern;

10． Receiver FIFO Read Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 B000h

This command is used to read FIFO data when FFIT interrupt generated. FIFO data

th

output starts at 8

SCK period.

11． AFC Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 0 1 0 0 a1 a0 rl1 rl0 st fi oe en C4F7h

a1..a0: select AFC auto-mode：

a1 a0
0 0 Controlled by MCU
0 1 Run once at power on
1 0 Keep offset when VDI hi
1 1 Keeps independently from VDI

rl1..rl0: select range limit

r1 r0
0 0 No restriction
0 1 +15/-16
1 0 +7/-8
1 1 +3-4

range（fres）

st: st goes hi will store offset into output register
fi: Enable AFC hi accuracy mode
oe: Enable AFC output register
en: Enable AFC funcition

fres

315，433band: 2.5kHz
868band: 5kHz
915band: 7.5kHz

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RF12 Program V1.1

12． TX Configuration Control Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 0 0 1 1 0 0 mp

m3 m2 m1 m0

0

p2 p1 p0

9800h

m: select modulation polarity
m2..m0: select frequency deviation:

m3 m2 m1 m0
0 0 0 0 15
0 0 0 1 30
0 0 1 0 45
0 0 1 1 60
0 1 0 0 75
0 1 0 1 90
0 1 1 0 105
0 1 1 1 120
1 0 0 0 135
1 0 0 1 150
1 0 1 0 165
1 0 1 1 180
1 1 0 0 195
1 1 0 1 210
1 1 1 0 225

frequency deviation [kHz]

1 1 1 1 240

p2..p0: select output power

p2 p1 p0 Output power[dBm]
0 0 0 0
0 0 1 -3
0 1 0 -6
0 1 1 -9
1 0 0 -12
1 0 1 -15
1 1 0 -18
1 0 1 -21

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RF12 Program V1.1

13． PLL Setting Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 1 1 0 0 0 ob1 ob0 1 ddy ddit 1 bw0 CC77h
ob1-ob0: Microcontroller output clock buffer rise and fall time control.

ob1 ob0 Selected u C CLK frequency

0 0 5 or 10 MHz (recommended)
0 1 3.3 MHz
1 X 2.5 MHz or less

ddy: phase detector delay enable.

ddi: disables the dithering in the PLL loop.
bw1-bw0: select PLL bandwidth

bw0 Max bit rate [kbps] Phase noise at 1MHz offset [dBc/Hz]

0 86.2 -107
1 256 -102

14． Transmitter Register Write Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 0 1 1 1 0 0 0 t7 t6 t5 t4 t3 t2 t1 t0 B8AAh

This command is use to write a data byte to RF12 and then RF12 transmit it

15． Wake-Up Timer Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 1 r4 r3 r2 r1 r0 m7 m6 m5 m4 m3 m2 m1 m0 E196h

The wake-up period is determined by:

T

= M * 2R [ms]

wake-up

For continual operation, bit ‘et’ must be cleared and set

16． Low Duty-Cycle Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 1 0 0 0 d6 d5 d4 d3 d2 d1 d0 en C8OEh

d6..d0: Set duty cycle

D.C.= (D * 2 +1) / M *100%

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RF12 Program V1.1

en：Enable low duty cycle mode

17． Low Battery Detector and Microcontroller Clock Divider Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 0 0 0 0 d2 d1 d0 0 v3 v2 v1 v0 C000h

d2..d0: select frequency of CLK pin

d2 d1 d0 Clock frequency[MHz]
0 0 0 1
0 0 1 1.25
0 1 0 1.66
0 1 1 2
1 0 0 2.5
1 0 1 3.33
1 1 0 5
1 1 1 10

CLK signal is derive form crystal oscillator and it can be applied to MCU clock in to save
a second crystal.
If not used, please set bit “dc” to disable CLK output

To integrate the load capacitor internal can not only save cost, but also adjust reference
frequency by software

v3..v0: Set threshold voltage of Low battery detector：
Vlb=2.2+V*0.1 [V]

18． Status Read Command

bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
0 x x x x x x x x x x x x x x x -

This command starts with a 0 and be used to read internal status register

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RF12 Program V1.1

N

3． Demo flow diagram

Transmitter:

DEMO

Init RF12B

Open TX

Send data

Close TX

Send data

Wait nIRQ low

Write a byte

Package

Y

return

Note: Initialize RF12B and open transmitter, RF12B will transm
w

hen transmit over, then MCU can write next byte to transmit

it a byte and pull nIRQ low

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N

p

N

Receiver:

RF12 Program V1.1

DEMO

Init RF12B

Open RX

Receive data

Check

ass?

Y

Indicate receive

Receive data

Wait nIRQ low

Read FIFO data

Data recive

Y

return

Note: After RF12B initialization, Open FIFO receive mode and wait nIRQ low, only then MCU

e

can r ad received and stored in FIFO data. For next package receive, please reset FIFO.

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RF12 Program V1.1

4． Example 1（for AVR microcontroller）

RF12 transmitter de o: m
/*
; copyright (c) 2006
;Title RF12 TX si
;Company: Hope micro
;Author: Tank
;Current version: v1.0
;Date: 2006-11-13
;processor ATMEGA48
;Clock: 10MHz Crystal

;Contact: [phone]

;E

Connections

ATMEGA48 SIDE RF12 S
SCK--------------->SCK
MISO--------------->SDO
MOSI--------------->SDI

INT0<-----------

PD6: LED GREEN

*/

SS--------------->nSEL

PD7: LED RED

-MAIL: [email protected]

IDE

----nIRQ

mple example based on AVR C
electronic Co.,Ltd.

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RF12 Program V1.1

nclude <mega48.h>

#i

efine DDR_IN 0

#d
#define DDR_OUT 1

#define PORT_SEL PORTB
#d

efine PIN_SEL PINB

#define DDR_SEL DDRB

#define PORT_SDI PORTB
#d

efine PIN_SDI PINB

#define DDR_SDI DDRB

#define PORT_SCK PORTB
#d

efine PIN_SCK PINB

#define DDR_SCK DDRB

#define PORT_SDO PORTB
#d

efine PIN_SDO PINB

#define DDR_SDO DDRB

#define PORT_DATA PORTD
#define

PIN_DATA PIND

#define DDR_DATA DDRD

#define PB7 7//--\
#define PB6 6// |
#define RFXX_SCK 5// |
#define RFXX_SDO 4// |RF

_PORT
#define RFXX_SDI 3// |
#define RFXX_SEL 2// |
#d

efine NC 1// |

#define PB0 0//--/

#define SEL_OUTPUT() DDR_SEL |= (1<<RFXX_SEL)
#d

efine HI_SEL() PORT_SEL|= (1<<RFXX_SEL)

#define LOW_SEL() PORT_SEL&=~(1<<RFXX_SEL)

#define SDI_OUTPUT() DDR_SDI |= (1<<RFXX_SDI)
#d

efine HI_SDI() PORT_SDI|= (1<<RFXX_SDI)

#define LOW_SDI() PORT_SDI&=~(1<<RFXX_SDI)

#d

efine SDO_INPUT() DDR_SDO&= ~(1<<RFXX_SDO)

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RF12 Program V1.1

#define SDO_HI() PIN_SDO&(1<<RFXX_SDO)

#define SCK_OUTPUT() DDR_SCK |= (1<<RFXX_SCK)

efine HI_SCK() PORT_SCK|= (1<<RFXX_SCK)

#d
#define LOW_SCK() PORT_SCK&=~

(1<<RFXX_SCK)

#define RF12_DATA 4//PD4
#d

efine DATA_OUT DDR_DATA|=1<<RF12_DATA

#define HI_DATA PORT_DATA|=1<<R

F12_DATA

#d

efine LEDG_OUTPUT() DDRD|=~(1<<6)

#define LEDR_OUTPUT() DDRD|=~(1<<7)

#define LEDG_ON() PORTD&=~(1<<6)
#define LEDG_OFF() PORTD|=~(1<<6)
#define
#defin

LEDR_ON() PORTD&=~(1<<7)

e LEDR_OFF() PORTD|=~(1<<7)

void RFXX_POR

T_INIT(void){
HI_SEL();
HI_SDI();
LOW_SCK();
SEL_OUTPUT();
SDI_OUTPUT();

DO_INPUT();

S
SCK_OUTPUT();
}
unsigned int RFXX_WRT_
unsigned char i;
unsigned int temp

CMD(unsigned int aCmd){

;
LOW_SCK();
LOW_SEL();
for(i=0;i<16;i++){
temp<<=1;
if(SDO_HI
temp|=0x00

()){

01;
}
LOW_SCK();
if(aCmd&0x800

0){
HI_SDI();
}else{
LOW_SDI()

;

}

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RF12 Program V1.1

HI_SCK();
aCmd<<=1;
};
LOW_SCK();

SEL();

HI_
return(temp);
}
void RF12_INIT(void){
RFXX_WRT_CMD(0x80D7);//EL,EF,433band,1
RFXX_WRT_CMD(0x8239);//!er,!ebb,

ET,ES,EX,!eb,!ew,DC

2.0pF

RFXX_WRT_CMD(0xA640);//A140=430.8MHz
RFXX_WRT_CMD(0xC647);//4.8kbps
RFXX_WRT_CMD(0x94A0);//VDI,FAST,134kHz,0dB

RFXX_WRT_CMD(0xC2AC);//AL,!ml,DIG,DQ

D4

m,-103dBm

RFXX_WRT_CMD(0xCA81);//FIFO8,SYNC,!ff,DR

RFXX_WRT_CMD(0xCED4);//SYNC=2DD4；
RFXX_WRT_CMD(0xC483);//@PWR,NO RSTRIC,!st,!fi,OE,EN
RFXX_WRT_CMD(0x9850);//!mp,9810=
RFXX_WRT_CMD(0xCC77);//OB1，OB0,

30kHz,MAX OUT

！lpx,！ddy，DDIT，BW0
RFXX_WRT_CMD(0xE000);//NOT USE
RF

XX_WRT_CMD(0xC800);//NOT USE
RFXX_WRT_CMD(0xC040);//1.66MHz,2.2V
}
void RF12_SEND(unsigned char aByte)
w

hile(PIND&(1<<2));//wait for previously TX over

RFXX_WRT_CMD(0xB800+aByte);

{

}

void Delay_ms(unsig

ned char amS){
unsigned char i;
u

nsigned int j;

for(i=0;i<amS;i

++)for(j=0;j<914;j++);
}
void main(void)
{
un

signed int i,j;

unsigned char C

hkSum;

#asm("cli");
DD

RB=0x00;//PB INPUT;

DDRD=0x00;//PD INPUT;

//POWER ON ind

ication: both LEDR and LEDG blink 3 times

LEDG_OFF();

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RF12 Program V1.1

LEDR_OFF();
LEDG_OUTPUT();
LEDR_OUTPUT();
for(i=0;i<3;i+
Delay_ms(200)

+){

;
LEDG_ON();
LEDR_ON();
Delay_ms(200);
L

EDG_OFF();

LE

DR_OFF();

}

LE

DG_OFF();

LEDR_OFF();

RFXX_PORT_INIT

();

RF12_INIT();

DDRD|=(1<<RF12_DATA);
PO

RTD|=(1<<RF12_DATA);// SET nFFS pin HI when using TX register

DD

RD&=~(1<<2); //PD2(INT0)

while(1){
LEDR_ON();
RF
RFXX_WRT_CM

XX_WRT_CMD(0x0000);//read status register

D(0x8239);//!er,!ebb,ET,ES,EX,!eb,!ew,DC

ChkSum=0;
RF12_SEND(0xAA);//PREAMBLE
RF12_SEND(0xAA);//PREAMBLE
RF12_SEND(0xAA);//PREAMBLE
RF12_SEND(0x2D);//SYNC HI BYTE
RF12_SEND(0xD4);//SY

NC LOW BYTE
RF12_SEND(0x30);//DATA BYTE 0
ChkSum+=0x30;
RF12_SEND(0x31);//D

ATA BYTE 1
ChkSum+=0x31;
RF12_SEND(0x32);
ChkSum+=0x32;
RF12_SEND(0x33);
ChkSum+=0x33;
RF12_SEND(0x34);

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RF12 Program V1.1

ChkSum+=0x34;
RF12_SEND(0x35);
ChkSum+=0x35;
RF12_SEND(0x36);
ChkSum+=0x36;
RF12_SEND(0x37);
ChkSum+=0x37;
RF12_SEND(0x38);
ChkSum+=0x38;
RF12_SEND(0x39);
ChkSum+=0x39;
RF12_SEND(0x3A);
ChkSum+=0x3A;
RF12_SEND(0x3B);
ChkSum+=0x3B;
RF12_SEND(0x3C);
ChkSum+=0x3C;
RF12_SEND(0x3D);
ChkSum+=0x3D;
RF12_SEND(0x3E);
ChkSum+=0x3E;
RF12_SEND(0x3F); //DATA BYTE 15
ChkSum+=0x3F;
RF12_SEND(ChkSum); //send chek

sum

RF12_SEND(0xAA);//DUMMY BYTE

RF12_SEND(0xAA);//DUMMY BYTE

RF12_SEND(0xAA);//DUMMY

BYTE

RFXX_WRT_CMD(

0x8201);
LEDR_OFF();
LE
fo

DG_OFF();
r(i=0;i<10000;i++)for(j=0;j<123;j++);//sleep 1 second appr.

};

}

RF12 receiver demo
/*
; copyright (c) 2006
;Title RF12 RX si
;Company: Hope micro

mple example based on AVR C
electronic Co.,Ltd.

;Author: Tank

Tel: [phone] Fax: [phone] E-mail: [email protected] http://www.hoperf.com

RF12 Program V1.1

;Current version: v1.0
;Date: 2006-11-17
;processor ATMEGA48
;Clock: 10MHz Crystal

;Contact: [phone]

;E

-MAIL: [email protected]

Connections

ATMEGA48 SIDE RF12 S
SCK--------------->SCK

IDE

MISO<---------------SDO
MOSI--------------->SDI
SS--------------->nSEL
P
INT0<-----------

D4--------------->FSK/DATA

----nIRQ

PD6: LED GREEN

PD7: LED RED

*/

#i

nclude <mega48.h>

#d

efine DDR_IN 0

#define DDR_OUT 1

#define PORT_SEL PORTB
#d

efine PIN_SEL PINB

#define DDR_SEL DDRB

#define PORT_SDI PORTB
#d

efine PIN_SDI PINB

#define DDR_SDI DDRB

#define PORT_SCK PORTB
#d

efine PIN_SCK PINB

#define DDR_SCK DDRB

#define PORT_SDO PORTB
#d

efine PIN_SDO PINB

#define DDR_SDO DDRB

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RF12 Program V1.1

#define PORT_IRQ PORTD

efine PIN_IRQ PIND

#d
#define DDR_IRQ DDRD

#define PORT_DATA PORTD
#define

PIN_DATA PIND

#define DDR_DATA DDRD

#define PB7 7//--\
#define PB6 6// |
#define RFXX_SCK 5// |
#define RFXX_SDO 4// |RF

_PORT
#define RFXX_SDI 3// |
#define RFXX_SEL 2// |

efine NC 1// |

#d
#define PB0 0//--/

#define SEL_OUTPUT() DDR_SEL |= (1<<RFXX_SEL)
#d

efine HI_SEL() PORT_SEL|= (1<<RFXX_SEL)

#define LOW_SEL() PORT_SEL&=~(1<<RFXX_SEL)

#define SDI_OUTPUT() DDR_SDI |= (1<<RFXX_SDI)
#d

efine HI_SDI() PORT_SDI|= (1<<RFXX_SDI)

#define LOW_SDI() PORT_SDI&=~(1<<RFXX_SDI)

#define SDO_INPUT() DDR_SDO&= ~(1<<RFXX_SDO)
#d

efine LOW_SDO() PORT_SDO&= (1<<RFXX_SDO)

#define SDO_HI() PIN_SDO&(1<<RFXX_SDO)

#define SCK_OUTPUT() DDR_SCK |= (1<<RFXX_SCK)
#d

efine HI_SCK() PORT_SCK|= (1<<RFXX_SCK)

#define LOW_SCK() POR

T_SCK&=~(1<<RFXX_SCK)

#define RF12_IRQ 2
#d

efine IRQ_IN() DDR_IRQ &=~(1<<RF12_IRQ)

#define WAIT_IRQ_LOW() while(PIND&

(1<<RF12_IRQ))

#define RF12_DATA 4//PD4
#d

efine DATA_OUT() DDR_DATA|=1<<RF12_DATA

#define HI_DATA() PORT_DATA|=1<<R

F12_DATA

#d

efine LEDG_OUTPUT() DDRD|=~(1<<6)

#define LEDR_OUTPUT() DDRD|=~(1<<7)

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RF12 Program V1.1

#define LEDG_ON() PORTD&=~(1<<6)
#define LEDG_OFF() PORTD|= (1<<6)
#define
#defin

LEDR_ON() PORTD&=~(1<<7)

e LEDR_OFF() PORTD|= (1<<7)

void RFXX_POR

T_INIT(void){
HI_SEL();
HI_SDI();
LOW_SCK();
//SET nFFS pin

HI when using FIFO
HI_DATA();
SEL_OUTPUT();
SDI_OUTPUT();
SDO_INPUT()
SCK_OUTPUT();
I

RQ_IN();

;

DATA_OUT();
}
unsigned int RFXX_WRT_CM
unsigned

char i;

unsigned int temp

D(unsigned int aCmd){

;
temp=0;
LOW_SCK();
LOW_SEL();
for(i=0;i<16;i+
if(aCmd&0x800

+){

0){
HI_SDI();
}else{
LOW_SDI()

;
}
HI_SCK();
temp<<=1;
if(SDO_HI
temp|=0x000
}

()){

1;

LOW_SCK();

aCmd<<=1;
};
HI_

SEL();
return(temp);
}

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RF12 Program V1.1

void RF12_INIT(void){
RFXX_WRT_CMD(0x80D7);//EL,EF,433band,1
RFXX_WRT_CMD(0x82D9);//!er,!ebb,

ET,ES,EX,!eb,!ew,DC

2.0pF

RFXX_WRT_CMD(0xA640);//A140=430.8MHz
RFXX_WRT_CMD(0xC647);//4.8kbps
RFXX_WRT_CMD(0x94A0);//VDI,FAST,134kHz,0dB

RFXX_WRT_CMD(0xC2AC);//AL,!ml,DIG,DQ

D4

m,-103dBm

RFXX_WRT_CMD(0xCA81);//FIFO8,SYNC,!ff,DR

RFXX_WRT_CMD(0xCED4);//SYNC=2DD4；
RFXX_WRT_CMD(0xC483);//@PWR,NO RSTRIC,!st,!fi,OE,EN
RFXX_WRT_CMD(0x9850);//!mp,9810=
RFXX_WRT_CMD(0xCC77);//OB1，OB0,

30kHz,MAX OUT

！lpx,！ddy，DDIT，BW0
RFXX_WRT_CMD(0xE000);//NOT USE
RFXX_WRT
RFXX_WRT_CMD(0xC040);//1.66MHz

_CMD(0xC800);//NOT USE

,2.2V
}
unsigned char RF12_

RECV(void){
unsigned int FIFO_data;
WAIT_IRQ_LOW();
RFXX_WRT_CMD(0x0000);
F

IFO_data=RFXX_WRT_CMD(0xB000);
return(FIFO_data&0x00FF);
}
void Delay_ms(unsig

ned char amS){
unsigned char i;
u

nsigned int j;

for(i=0;i<amS;i

++)for(j=0;j<914;j++);
}
void main(void)
{
un

signed char i;

unsigned char ChkSum;

//POWER ON in

dication: both LEDR and LEDG blink 3 times

LEDG_OFF();
LEDR_OFF();
LE

DG_OUTPUT();

LEDR_OUTPUT();

for(i=0;i<3;i+
Delay_ms(200)

+){

;
LEDG_ON();
LEDR_ON();

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RF12 Program V1.1

Delay_ms(200);

EDG_OFF();

L
LE

DR_OFF();

}

LEDG_OFF();

LEDR_OFF();

//

Initialize command port

RFXX_PORT_INIT();

//

Initialize RF12 chip

RF12_INIT();

Init FIFO

//
RFXX_WRT_CMD(0xCA

81);

while(1){
//Enable FIFO
RFXX_WRT_

CMD(0xCA83);

ChkSum=0;

//Receive payload data
for(i=0;i

ChkSum+=RF12_RECV();

<16;i++){

}

//R

eceive Check sum

i=RF12_RECV();

//
RFXX_WRT_CMD(0xCA8

Disable FIFO

1);

//Package chkec

k
if(ChkSum==i){
LEDG_ON();
Delay_

LEDG_OFF();

}

}

ms(200);

}

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RF12 Program V1.1

5． Example 2（for PIC microcontroller）

RF transmitter demo: 12
/**********************************************************
copyright (c) 2006
Title: RFM12B transmitter
Current version: v1.0
Function: Package send De
Processor PIC16F73
Clock: 10MHz Cry
Operate frequency: 434MHz
Data rate: 4.8kbps
Package size: 23byte
Author: Robben
Company: Hope microelectronic C
Contact: [phone]
E-MAIL: [email protected]
Date:

******************************************************/

**
#include "pic.h"

pedef unsigned char uchar;

ty
typedef unsigned int uint;

#define SDI RB7
#define SDO RB6

efine SCK RB5

#d

2006-11-21

simple example based on PIC C

mo

DIP-28

stal

o.,Ltd.

6557

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RF12 Program V1.1

#define nSEL RB4

#define SDI_OUT() TRISB7=0
#define SDO_IN() TRISB6=1

efine SCK_OUT() TRISB5=0

#d
#define nSEL_OUT()

TRISB4=0

void Init_RF12(void);
void Write0( void );
void Write1( void );
void WriteCMD( uint CMD

);

void DelayUs( uint us );

id DelayMs(uint ms);

vo
void WriteFSKbyte(

uchar DATA );

__CONFIG(0x3FF2);

void Init_RF12(

void)
{
nSEL_OUT();
SDI_OUT();
SDO_IN();
SCK_OUT(

);
nSEL=1;
SDI=1;
SCK=0;
WriteCMD(0x80D8);//en
WriteCMD(0x8208);//Tu

WriteCMD(0xA640);//

able register,433MHz,12.5pF
rn on crystal,!PA

WriteCMD(0xC647);//

WriteCMD(0XCC77);//

WriteCMD(0x94A0);//

VDI,FAST,134kHz,0dBm,-103dBm
WriteCMD(0xC2AC);
WriteCMD(0xCA80);
WriteCMD(0xCA83);//FIFO8,SYNC,
WriteCMD(0xC49B);
WriteCMD(0x9850);//!mp,9810=

30kHz,MAX OUT

WriteCMD(0xE000);//NOT USE

riteCMD(0xC80E);//NOT USE

W

WriteCMD(0xC000);//1.0MHz,2.2V

}

void main()
{

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RF12 Program V1.1

uint ChkSu
Init_RF12(

m=0;

);
while(1)
{
WriteCMD(0x8228);
DelayUs(
WriteCMD

4 );
(0x8238);

//OPEN PA

NOP();
NOP();
WriteFSKbyte( 0xAA );
WriteFSKbyte( 0xAA );
WriteFSKbyte( 0xAA );

WriteFSKbyte( 0x2D );

WriteFSKbyte( 0xD4 );

WriteFSKbyte( 0x30 );//DATA0
ChkSum+=0x30;
WriteFSKbyte( 0x31 );//

DATA1
ChkSum+=0x31;
WriteFSKbyte( 0x32 );
ChkSum+=0x32;
WriteFSKbyte( 0x33 );
ChkSum+=0x33;
WriteFSKbyte( 0x34 );
ChkSum+=0x34;
WriteFSKbyte( 0x35 );
ChkSum+=0x35;
WriteFSKbyte( 0x36 );
ChkSum+=0x36;
WriteFSKbyte( 0x37 );
ChkSum+=0x37;
WriteFSKbyte( 0x38 );
ChkSum+=0x38;
WriteFSKbyte( 0x39 );
ChkSum+=0x39;
WriteFSKbyte( 0x3A );
ChkSum+=0x3A;
WriteFSKbyte( 0x3B );
ChkSum+=0x3B;
WriteFSKbyte( 0x3C );
ChkSum+=0x3C;
WriteFSKbyte(0x3D);
ChkSum+=0x3D;
WriteFSKbyte( 0x3E );

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RF12 Program V1.1

ChkSum+=0x3E;
WriteFSKbyte( 0x

3F );//DATA15
ChkSum+=0x3F;
ChkSum&=0x0FF;
WriteFSKbyte( ChkSum );
WriteFSKbyte( 0x
Wri
D

}

teCMD( 0x8208 ); //CLOSE PA

elayMs(1000);

AA );

}

void Write

0( void )
{
SCK=0;

NOP();

SDI=0;

NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
S

CK=1;

NOP();
}

void Write

1( void )
{
SCK=0;

NOP();

SDI=1;

NOP();
NOP();
NOP();

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NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();

CK=1;

S

NOP();
}

void WriteCMD(

uint CMD )
{
uchar n=1

6;
SCK=0;
nSEL

=0;
while(n--)
{
if(CMD

&0x8000)
Write1();
else

CMD=C

Write0();

MD<<1;

}

CK=0;

S

nSEL=1;

}

WriteFSKbyte( uchar DATA )

void
{

uchar RGIT=0;
uint temp=0xB800;
temp|=DAT
Loop: SCK=

A;

0;
nSEL=0;
SDI=0;
SCK=
if(SDO)

1;

//Polling SDO

RF12 Program V1.1

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{
RGIT

=1;
}
else
{
RGIT=0

;
}
SCK=0;
SDI=1;
nSEL

=1;
if(RGIT==0)
{
goto

Loop;
}
else
{
RGIT

=0;

WriteCMD(temp);

}

}

void DelayU

s( uint us )
{
uint i;
while( us--

)
{
i=2;
while( i-- )
{

NOP();

}

}

}

void DelayMs

(uint ms)
{
uch

ar i;

while(ms

--)
{
i=3

5;
while(i--)
{

DelayUs(1);

RF12 Program V1.1

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RF12 Program V1.1

}

}

}

12

RF receiver demo:
/**********************************************************
copyright (c) 2006
Title: RFM12B transmitter

simple example based on PIC C
Current version: v1.0
Function: Package send De
Processor PIC16F73
Clock: 10MHz Cry

DIP-28

stal

mo

Operate frequency: 434MHz
Data rate: 4.8kbps
Package size: 23byte
Author: Robben
Company: Hope microelectronic C
Contact: [phone]

6557

o.,Ltd.

E-MAIL: [email protected]
Date:

******************************************************/

**

2006-11-17

#include "pic.h"

pedef unsigned char uchar;

ty
typedef unsigned int uint;

#define SDI RB7
#define SDO RB6
#define SCK RB5
#define nSEL RB4
#define nIRQ RB3
#define LED RA0
#define LED_OUT() TRISA0=0
#define nIRQ_IN() TRISB3=1
#define SDI_OUT() TRISB7=0
#define SDO_IN() TRISB6=1

efine SCK_OUT() TRISB5=0

#d
#define nSEL_OUT()

TRISB4=0

void Init_RF12(void);
void Write0( void );
void Write1( void );

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RF12 Program V1.1

void WriteCMD( uint CMD );
uc

har RF12_RDFIFO(void);

void Delayus( uint

us );

__CONFIG(0x3FF2);
bank1 uc
void

har RF_RXBUF[19];

Init_RF12(void)

{

LED_OUT();
nSEL_OUT();
SDI_OUT();
SDO_IN();
SCK_OUT()
nIRQ_IN(

;

);
nSEL=1;
SDI=1;
SCK=0;
SDO=0;
LED=0;
WriteCMD(0x80D8);//en
WriteCMD(0x82D8);//en

able register,433MHz,12.5pF

able receive,!PA
WriteCMD(0xA640);//
WriteCMD(0xC647);//

WriteCMD(0x94A0);//VD ,F

I AST,134kHz,0dBm,-103dBm
WriteCMD(0xC2AC);

WriteCMD(0XCC77);//
WriteCMD(0xCA80);
WriteCMD(0xCA83);//FIFO8,SYNC,
WriteCMD(0xC49B);
WriteCMD(0x9850);//!mp,9810=

30kHz,MAX OUT
WriteCMD(0xE000);//NOT USE
W

riteCMD(0xC800);//NOT USE

WriteCMD(0xC000);//1.0MHz,2.2V

}

void main()
{
uch

ar i=0,j=0;

uint CheckSum

;

Init_RF12(

);

while(1)

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RF12 Program V1.1

{
while(!nIRQ)
{
RF_RX
if(i==17)

BUF[i++]=RF12_RDFIFO();

{
i=0;
WriteCMD(0xCA80
WriteCMD(0xCA83);

);

//reset FIFO and read to receive next Byte
CheckSum=0;
for(j=0;j<16;j++)
CheckSum+=RF_RXBUF[j]; //add 0x
Check
if(CheckSum

Sum&=0x0FF;

==RF_RXBUF[16])
{
LED=1;
}
Del
LED

}

}

ayus(1);
=0;

}

}

void Write

0( void )
{
SCK=0;

NOP();

SDI=0;

NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();

30-----0x3F

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CK=1;

S

NOP();
}

void Write

1( void )
{
SCK=0;

NOP();

SDI=1;

NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
NOP();
S

CK=1;

NOP();
}

void WriteCMD(
{
uchar n=1

6;
SCK=0;
nSEL

=0;
while(n--)
{
if(CMD

&0x8000)
Write1();
else

CMD=C

Write0();

MD<<1;

}

CK=0;

S

nSEL=1;

}

RF12 Program V1.1

uint CMD )

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uchar RF12_RDFIFO(v
{
uchar i,

Result;
SCK=0;
SDI=0;
nSEL=0;
for(i=0;i<

16;i++)
{
SCK=1;
NOP();
NOP();
SCK=0;
NOP();
NOP();
}
Result=0;
for(i=0;i<8;i++)
{
Res

ult=Result<<1;

//read fifo data byte

if(SDO)
{
Result

|=1;
}
SCK=1;
NOP();
NOP();
SCK=0;
NO

P();
NOP();
}

EL=1;

nS
return(Result);
}
void Delayu

s( uint us )
{
uint i;
while( us-- )
{
i=100

0;
while( i-- )
{

RF12 Program V1.1

oid)

//skip status bits

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RF12 Program V1.1

}

}

}

NOP();

HOPE MICROELECTRONICS CO.,LTD

Add:4/F, Block B3, East I
Huaqiaocheng, Shenzhen,
China
Tel: [phone]
Fax: [phone]

[email protected]

mail:

E
W

ebsite: http://www.hoperf.com

http://www.hoperf.cn

http://hoperf.en.alibaba.com

ndustrial Area,

Guangdong,

This document may contain preliminary information and is subject to
change by Hope Microelectronics without notice. Hope Microelectronics
assumes no responsibility or liability for any use of the information
contained herein. Nothing in this document shall operate as an express
or implied license or indemnity under the intellectual property rights of
Hope Microelectronics or third parties. The products described in this
document are not intended for use in implantation or other direct life
support applications where malfunction may result in the direct physical
harm or injury to persons. NO WARRANTIES OF ANY KIND,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MECHANTABILITY OR FITNESS FOR A ARTICULAR PURPOSE, ARE
OFFERED IN THIS DOCUMENT.

©2006, HOPE MICROELECTRONICS CO.,LTD. All rights reserved.

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