RFM12B RFM12B UNIVERSAL ISM BAND FSK TRANSCEIVER MODULE RFM12B. General Introduction. Features:
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- Arthur Buck Moore
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1 RFM12B UNIVERSAL ISM BAND FSK TRANSCEIVER MODULE RFM12B (the purpose of this spec covers mainly for the physical characteristic of the module, for register configure and its related command info please refer to RF12B data sheets) General Introduction RFM12B is a low costing ISM band transceiver module implemented with unique PLL. It works signal ranges from 433/868/915MHZ bands, comply with FCC, ETSI regulation. The SPI interface is used to communicate with microcontroller for parameter setting. Features: RFM12B Low costing, high performance and price ratio Tuning free during production PLL and zero IF technology Fast PLL lock time High resolution PLL with 2.5 KHz step High data rate (up to kbps with internal demodulator,with external RC filter highest data rate is 256 kbps) Differential antenna input/output Automatic antenna tuning Programmable TX frequency deviation (from 15 to 240 KHz) Programmable receiver bandwidth (from 67 to 400 khz) Analog and digital signal strength indicator (ARSSI/DRSSI) Automatic frequency control (AFC) Data quality detection (DQD) Internal data filtering and clock recovery RX synchron pattern recognition SPI compatible serial control interface Clock and reset signal output for external MCU use 16 bit RX Data FIFO Two 8 bit TX data registers Standard 10 MHz crystal reference Wakeup timer 2.2V 3.8V power supply Low power consumption Standby current less than 0.3uA Supports very short packets (down to 3 bytes) Tel: Fax: [email protected]
2 Typical Application: RFM12B Remote control Remote sensor Wireless data collection Home security system Toys Tire pressure monitoring system Pin Definition: SMD DIP definition Type Function nint/vdi DI/ DO Interrupt input (active low)/valid data indicator VDD S Positive power supply SDI DI SPI data input SCK DI SPI clock input nsel DI Chip select (active low) SDO DO Serial data output with bus hold nirq DO Interrupts request output(active low) FSK/DATA/nFFS DI/DO/DI Transmit FSK data input/ Received data output (FIFO not used)/ FIFO select DCLK/CFIL/FFIT DO/AIO/DO Clock output (no FIFO )/ external filter capacitor(analog mode)/ FIFO interrupts(active high)when FIFO level set to 1, FIFO empty interruption can be achieved CLK DO Clock output for external microcontroller nres DIO Reset output(active low) GND S Power ground Electrical Parameter: Maximum(not at working mode) symbol parameter minimum maximum Unit V dd Positive power supply V V in All pin input level -0.5 Vdd+0.5 V Tel: Fax: [email protected]
3 RFM12B I in Input current except power ma ESD Human body model 1000 V T st Storage temperature T ld Soldering temperature(10s) 260 Recommended working range symbol parameter minimum maximum Unit V dd Positive power supply V T op Working temperature DC characteristic symbol parameter Remark minimum typical maximum Unit I dd_tx_0 I dd_tx_pmax I dd_rx Supply current (TX mode, P out = 0dBm) Supply current (TX mode, P out = P max ) Supply current (RX mode) 315,433MHz band 868MHz band 915MHz band 315,433MHz band 868MHz band 915MHz band 315,433MHz band 868MHz band 915MHz band I x Idle current Crystal oscillator on ma I pd Sleep mode current All blocks off 0.3 ua I lb Low battery detection 0.5 ua V lb Low battery detect 0.1V per step V threshold V lba Low battery detection 0 5 % accuracy V il Low level input 0.3*V dd V V ih High level input 0.7*V dd V I il Leakage current V il =0V -1 1 ua I ih Leakage current V ih =V dd, V dd =5.4V -1 1 ua V ol Low level output I ol =2mA 0.4 V V oh High level output I oh =-2mA V dd -0.4 V AC characteristic symbol parameter remark min typical max Unit f ref PLL frequency MHz f LO frequency (10MHz crystal 433 MHz band,2.5khz step 868 MHz band,5khz step MHz used) 915 MHz band,7.5khz step f LO frequency (9MHZ crystal used) 433 MHz band,2.5khz step 868 MHz band,5khz step 915 MHz band,7.5khz step MHz Tel: Fax: [email protected] ma ma ma
4 f LO BW RFM12B frequency (11MHZ crystal used) 433 MHz band,2.5khz step 868 MHz band,5khz step 915 MHz band,7.5khz step MHz Receiver mode bandwidth mode mode KHz mode mode mode t lock PLL lock time After 10MHz step hopping, 30 us frequency error <10 khz With a running crystal PLL startup time tst, P oscillator us BR Data rate With internal digital kbps demodulator BR A Data rate With external RC filter 256 kbps P min sensitivity BER 10-3, BW=134KHz,BR=1.2kbps dbm AFC range AFC working range df FSK : FSK deviation in the received signal RS A RSSI accuracy ±5 db RS R RSSI range 46 db C ARSSI ARSSI filter 1 nf RS STEP RS RESP 0.8* df FSK RSSI programmable step 6 db DRSSI response RSSI output high after 500 us time valid, CARRSI=5nF AC characteristic(transmitter) symbol parameter remark min typical max Unit P max_50 P max_ant Max. output power delivered to 433MHZ band 7 50Ohm load over a suitable dbm matching network 868/915MHZ band 5 Max. EIRP with suitable selected In 433 MHz band with monopole antenna with 7 PCB antenna. matching network dbm In 868 / 915 MHz bands 7 P out Typical output power Selectable in 3 db steps C o Output capacitance In low bands (set by the automatic antenna In high bands tuning circuit) P max -21 P max dbm pf Tel: Fax: [email protected]
5 Q o Quality factor of the output In low bands capacitance In high bands L out Output phase noise 100 khz from carrier 1 MHz from carrier BR TX FSK bit rate Via internal TX data register BRA TX FSK bit rate TX data connected to the FSK input df fsk FSK frequency deviation Programmable in 15 khz steps RFM12B dbc/hz kbps 256 kbps khz AC characteristic(turn-on/turnaround timings) symbol parameter remark min typical max Unit T st Crystal oscillator startup Crystal ESR < ms time Transmitter turn-on Synthesizer off, crystal T tx_xtal_on time oscillator on with 10 MHz step 250 us Receiver turn-on time Synthesizer off, crystal T rx_xtal_on oscillator on with 10 MHz step 250 us Transmitter Receiver Synthesizer and crystal T tx_rx_synt_on turnover time oscillator on during TX/RX 150 us change with 10 MHz step Receiver Transmitter Synthesizer and crystal T rx_tx_synt_on turnover time oscillator on during RX/TX 150 us change with 10 MHz step C xl Crystal load Programmable in 0.5 pf steps, pf capacitance tolerance+/- 10% t POR Internal POR timeout After V dd has reached 90% of 100 ms final value t PBt Wake-up timer clock Calibrated every 30 seconds ms period C in, D Digital input apacitance 2 pf t r, f Digital output rise/fall time 15pF pure capacitive load 10 ns Field testing range Band Test condition Distance 433MHz band Receiver bandwidth =67KHz, data rate=1.2kbps, transmitter frequency >200M deviation =45KHZ(matches with RFM12)In free open area 868MHz band Receiver bandwidth=67khz,data rate =1.2kbps,Transmitter frequency >300M deviation =45KHZ(matches with RFM12)in free open area 915MHz band Receiver bandwidth=67khz,data rate =1.2kbps,Transmitter frequency deviation =45KHZ(matches with RFM12)in free open area >300M Tel: Fax: [email protected]
6 SGS Reports RFM12B Tel: Fax:
7 Tel: Fax: RFM12B
8 Mechanical Dimension RFM12B (units in mm) SMD PACKAGE(S1) SMD PACKAGE(S2) Tel: Fax:
9 DIP PACKAGE(D) RFM12B Module Model Definition model=module-operation band RFM12B 433-D/S module type operation band Package example:1,rfm12b module at 433MHz band, DIP : RFM12B-433-D 2,RFM12B module at 868MHZ band, SMD, thickness at 4.2mm: RFM12B-868-S1 Tel: Fax: [email protected]
10 RFM12B HOPE MICROELECTRONICS CO.,LTD Rm B.8/F LiJingGe Emperor Regency 6012 ShenNan Rd., Shenzhen,China Tel: Fax: Website: 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. Tel: Fax: [email protected]
11 RF12 programming guide RF12B Program 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 POR el ef b1 b0 x3 x2 x1 x0 8008h e l: Enable TX register e f: Enable RX FIFO buffer
12 RF12B Program b1..b0: select band b1 b0 band[mhz] 0 0 Reserved x3..x0: select crystal load capacitor x3 x2 x1 x0 load capacitor [pf] Power Management Command bit POR 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 POR f11 f10 f9 f8 f7 f6 f5 f4 f3 f2 f1 f0 A680h f11..f0: Set operation frequency: 433band: Fc=430+F* MHz 868band: Fc=860+F* MHz 915band: Fc=900+F* MHz Fc is carrier frequency and F is the frequency parameter. 36 F 3903
13 RF12B Program 5. Data Rate Command bit POR cs r6 r5 r4 r3 r2 r1 r0 C623h r6..r0: Set data rate: BR= /29/(R+1)/(1+cs*7) 6. Receiver Control Command bit POR 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] reserved reserved d1..d0: select VDI response time d1 d0 Response 0 0 Fast 0 1 Medium 1 0 Slow 1 1 Always on g1..g0: select LNA gain g1 g0 LNA gain (dbm)
14 RF12B Program r2..r0: select DRSSI threshold r2 r1 r0 RSSIsetth [dbm] Reserved Reserved The actual DRSSI threshold is related to LNA setup: RSSI th = RSSI setth + G LNA. 7. Data Filter Command bit POR al ml 1 s 1 f2 f1 f0 C22Ch al: Enable clock recovery auto-lock ml: Enable clock recovery fast mode s: select data filter type s Filter type 0 Digital filter 1 Analog RC filter f1..f0: Set DQD threshold 8. FIFO and Reset Mode Command bit POR 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
15 RF12B Program 9. Synchron pattern Command bit POR b7 b6 b5 b4 b3 b2 b1 b0 CED4h This command is used to reprogram the synchronic pattern; 10. Receiver FIFO Read Command bit POR B000h This command is used to read FIFO data when FFIT interrupt generated. FIFO data output starts at 8 th SCK period. 11. AFC Command bit POR 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 range(fres) 0 0 No restriction / / fres 315,433band: 2.5kHz 868band: 5kHz 915band: 7.5kHz 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
16 RF12B Program 12. TX Configuration Control Command bit POR mp m3 m2 m1 m0 0 p2 p1 p0 9800h m: select modulation polarity m2..m0: select frequency deviation: m3 m2 m1 m0 frequency deviation [khz] p2..p0: select output power p2 p1 p0 Output power[dbm]
17 RF12B Program 13. PLL Setting Command bit POR ob1 ob0 lpx ddy ddit 1 bw0 CC67h ob1-ob0: Microcontroller output clock buffer rise and fall time control. ob1 ob0 Selected uc CLK frequency or 10 MHz (recommended) MHz 1 X 2.5 MHz or less lpx: select low power mode of the crystal oscillator. lpx Crystal start-up time (typ) Power consumption (typ) 0 1 ms 620 ua 1 2 ms 460 ua 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] Transmitter Register Write Command bit POR 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 POR r4 r3 r2 r1 r0 m7 m6 m5 m4 m3 m2 m1 m0 E196h The wake-up period is determined by: Twake-up = M * 2 R [ms] For continual operation, bit ew must be cleared and set 16. Low Duty-Cycle Command bit POR d6 d5 d4 d3 d2 d1 d0 en C8OEh
18 RF12B Program d6..d0: Set duty cycle D.C.= (D * 2 +1) / M *100% en:enable low duty cycle mode 17. Low Battery Detector and Microcontroller Clock Divider Command bit POR d2 d1 d0 0 v3 v2 v1 v0 C000h d2..d0: select frequency of CLK pin d2 d1 d0 Clock frequency[mhz] 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 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
![.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.](/docs-images/40/8476325/images/page_18.jpg "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.")
19 RF12B Program 3. Demo flow diagram Transmitter: DEMO Init RF12B Open TX Send data Close TX Send data Wait nirq low Write a byte Package send over? N Y return Note: Initialize RF12B and open transmitter, RF12B will transmit a byte and pull nirq low when transmit over, then MCU can write next byte to transmit
20 RF12B Program Receiver: DEMO Init RF12B Open RX Receive data N Check pass? Y Indicate receive Receive data Wait nirq low Read FIFO data Data recive over? N Y return Note: After RF12B initialization, Open FIFO receive mode and wait nirq low, only then MCU
21 RF12B Program can read received and stored in FIFO data. For next package receive, please reset FIFO. 4. Example 1(for AVR microcontroller) RF12 transmitter demo: /* ; copyright (c) 2006 ;Title RF12 TX simple example based on AVR C ;Company: Hope microelectronic Co.,Ltd. ;Author: Tank ;Current version: v1.0 ;Date: ;processor ATMEGA48 ;Clock: 10MHz Crystal ;Contact: ; [email protected] Connections ATMEGA48 SIDE RF12 SIDE SCK >SCK MISO >SDO MOSI >SDI SS >nSEL INT0< nIRQ PD6: LED GREEN PD7: LED RED
22 */ RF12B Program #include <mega48.h> #define DDR_IN 0 #define DDR_OUT 1 #define PORT_SEL #define PIN_SEL #define DDR_SEL PORTB PINB DDRB #define PORT_SDI #define PIN_SDI #define DDR_SDI PORTB PINB DDRB #define PORT_SCK #define PIN_SCK #define DDR_SCK PORTB PINB DDRB #define PORT_SDO #define PIN_SDO #define DDR_SDO PORTB PINB DDRB #define PORT_DATA #define PIN_DATA #define DDR_DATA PORTD PIND 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// #define NC 1// #define PB0 0//--/ #define SEL_OUTPUT() #define HI_SEL() #define LOW_SEL() DDR_SEL = (1<<RFXX_SEL) PORT_SEL = (1<<RFXX_SEL) PORT_SEL&=~(1<<RFXX_SEL) #define SDI_OUTPUT() DDR_SDI = (1<<RFXX_SDI)
23 #define HI_SDI() #define LOW_SDI() PORT_SDI = (1<<RFXX_SDI) PORT_SDI&=~(1<<RFXX_SDI) RF12B Program #define SDO_INPUT() #define SDO_HI() DDR_SDO&= ~(1<<RFXX_SDO) PIN_SDO&(1<<RFXX_SDO) #define SCK_OUTPUT() #define HI_SCK() #define LOW_SCK() DDR_SCK = (1<<RFXX_SCK) PORT_SCK = (1<<RFXX_SCK) PORT_SCK&=~(1<<RFXX_SCK) #define RF12_DATA #define DATA_OUT #define HI_DATA 4//PD4 DDR_DATA =1<<RF12_DATA PORT_DATA =1<<RF12_DATA #define LEDG_OUTPUT() #define LEDR_OUTPUT() DDRD =~(1<<6) DDRD =~(1<<7) #define LEDG_ON() #define LEDG_OFF() #define LEDR_ON() #define LEDR_OFF() PORTD&=~(1<<6) PORTD =~(1<<6) PORTD&=~(1<<7) PORTD =~(1<<7) void RFXX_PORT_INIT(void) HI_SEL(); HI_SDI(); LOW_SCK(); SEL_OUTPUT(); SDI_OUTPUT(); SDO_INPUT(); SCK_OUTPUT(); unsigned int RFXX_WRT_CMD(unsigned int acmd) unsigned char i; unsigned int temp; LOW_SCK(); LOW_SEL(); for(i=0;i<16;i++) temp<<=1; if(sdo_hi()) temp =0x0001; LOW_SCK(); if(acmd&0x8000)
24 HI_SDI(); else LOW_SDI(); HI_SCK(); acmd<<=1; ; LOW_SCK(); HI_SEL(); return(temp); void RF12_INIT(void) RFXX_WRT_CMD(0x80D7);//EL,EF,433band,12.0pF RFXX_WRT_CMD(0x8239);//!er,!ebb,ET,ES,EX,!eb,!ew,DC RFXX_WRT_CMD(0xA640);//434MHz RFXX_WRT_CMD(0xC647);//4.8kbps RFXX_WRT_CMD(0x94A0);//VDI,FAST,134kHz,0dBm,-103dBm RFXX_WRT_CMD(0xC2AC);//AL,!ml,DIG,DQD4 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,90kHz,MAX OUT RFXX_WRT_CMD(0xCC77);//OB1,OB0, LPX,!ddy,DDIT,BW0 RFXX_WRT_CMD(0xE000);//NOT USE RFXX_WRT_CMD(0xC800);//NOT USE RFXX_WRT_CMD(0xC040);//1.66MHz,2.2V void RF12_SEND(unsigned char abyte) while(pind&(1<<2));//wait for previously TX over RFXX_WRT_CMD(0xB800+aByte); RF12B Program void Delay_ms(unsigned char ams) unsigned char i; unsigned int j; for(i=0;i<ams;i++)for(j=0;j<914;j++); void main(void) unsigned int i,j; unsigned char ChkSum; #asm("cli"); DDRB=0x00;//PB INPUT;
25 DDRD=0x00;//PD INPUT; RF12B Program //POWER ON indication: both LEDR and LEDG blink 3 times LEDG_OFF(); LEDR_OFF(); LEDG_OUTPUT(); LEDR_OUTPUT(); for(i=0;i<3;i++) Delay_ms(200); LEDG_ON(); LEDR_ON(); Delay_ms(200); LEDG_OFF(); LEDR_OFF(); LEDG_OFF(); LEDR_OFF(); RFXX_PORT_INIT(); RF12_INIT(); DDRD =(1<<RF12_DATA); PORTD =(1<<RF12_DATA);// SET nffs pin HI when using TX register DDRD&=~(1<<2); //PD2(INT0) while(1) LEDR_ON(); RFXX_WRT_CMD(0x0000);//read status register RFXX_WRT_CMD(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);//SYNC LOW BYTE RF12_SEND(0x30);//DATA BYTE 0 ChkSum+=0x30; RF12_SEND(0x31);//DATA BYTE 1 ChkSum+=0x31; RF12_SEND(0x32);
26 ChkSum+=0x32; RF12_SEND(0x33); ChkSum+=0x33; RF12_SEND(0x34); 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 RF12B Program RFXX_WRT_CMD(0x8201); LEDR_OFF(); LEDG_OFF(); for(i=0;i<10000;i++)for(j=0;j<123;j++);//sleep 1 second appr. ; RF12 receiver demo /*
27 RF12B Program ; copyright (c) 2006 ;Title RF12 RX simple example based on AVR C ;Company: Hope microelectronic Co.,Ltd. ;Author: Tank ;Current version: v1.0 ;Date: ;processor ATMEGA48 ;Clock: 10MHz Crystal ;Contact: ; [email protected] Connections ATMEGA48 SIDE RF12 SIDE SCK >SCK MISO< SDO MOSI >SDI SS >nSEL PD >FSK/DATA INT0< nIRQ PD6: LED GREEN PD7: LED RED */ #include <mega48.h> #define DDR_IN 0 #define DDR_OUT 1 #define PORT_SEL #define PIN_SEL #define DDR_SEL PORTB PINB DDRB #define PORT_SDI #define PIN_SDI #define DDR_SDI PORTB PINB DDRB #define PORT_SCK #define PIN_SCK #define DDR_SCK PORTB PINB DDRB
28 RF12B Program #define PORT_SDO #define PIN_SDO #define DDR_SDO PORTB PINB DDRB #define PORT_IRQ #define PIN_IRQ #define DDR_IRQ PORTD PIND DDRD #define PORT_DATA #define PIN_DATA #define DDR_DATA PORTD PIND 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// #define NC 1// #define PB0 0//--/ #define SEL_OUTPUT() #define HI_SEL() #define LOW_SEL() DDR_SEL = (1<<RFXX_SEL) PORT_SEL = (1<<RFXX_SEL) PORT_SEL&=~(1<<RFXX_SEL) #define SDI_OUTPUT() #define HI_SDI() #define LOW_SDI() DDR_SDI = (1<<RFXX_SDI) PORT_SDI = (1<<RFXX_SDI) PORT_SDI&=~(1<<RFXX_SDI) #define SDO_INPUT() #define LOW_SDO() #define SDO_HI() DDR_SDO&= ~(1<<RFXX_SDO) PORT_SDO&= (1<<RFXX_SDO) PIN_SDO&(1<<RFXX_SDO) #define SCK_OUTPUT() #define HI_SCK() #define LOW_SCK() DDR_SCK = (1<<RFXX_SCK) PORT_SCK = (1<<RFXX_SCK) PORT_SCK&=~(1<<RFXX_SCK) #define RF12_IRQ 2 #define IRQ_IN() DDR_IRQ &=~(1<<RF12_IRQ) #define WAIT_IRQ_LOW() while(pind&(1<<rf12_irq)) #define RF12_DATA #define DATA_OUT() 4//PD4 DDR_DATA =1<<RF12_DATA
29 #define HI_DATA() PORT_DATA =1<<RF12_DATA RF12B Program #define LEDG_OUTPUT() #define LEDR_OUTPUT() DDRD =~(1<<6) DDRD =~(1<<7) #define LEDG_ON() PORTD&=~(1<<6) #define LEDG_OFF() PORTD = (1<<6) #define LEDR_ON() PORTD&=~(1<<7) #define LEDR_OFF() PORTD = (1<<7) void RFXX_PORT_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(); IRQ_IN(); DATA_OUT(); unsigned int RFXX_WRT_CMD(unsigned int acmd) unsigned char i; unsigned int temp; temp=0; LOW_SCK(); LOW_SEL(); for(i=0;i<16;i++) if(acmd&0x8000) HI_SDI(); else LOW_SDI(); HI_SCK(); temp<<=1; if(sdo_hi()) temp =0x0001; LOW_SCK(); acmd<<=1;
30 ; HI_SEL(); return(temp); void RF12_INIT(void) RFXX_WRT_CMD(0x80D7);//EL,EF,433band,12.0pF RFXX_WRT_CMD(0x8239);//!er,!ebb,ET,ES,EX,!eb,!ew,DC RFXX_WRT_CMD(0xA640);//434MHz RFXX_WRT_CMD(0xC647);//4.8kbps RFXX_WRT_CMD(0x94A0);//VDI,FAST,134kHz,0dBm,-103dBm RFXX_WRT_CMD(0xC2AC);//AL,!ml,DIG,DQD4 RFXX_WRT_CMD(0xCA81);//FIFO8,SYNC,!ff,DR RFXX_WRT_CMD(0xCED4);//SYNC=2DD4; RSTRIC,!st,!fi,OE,EN RFXX_WRT_CMD(0x9850);//!mp,90kHz,MAX OUT RFXX_WRT_CMD(0xCC77);//OB1,OB0, LPX,!ddy,DDIT,BW0 RFXX_WRT_CMD(0xE000);//NOT USE RFXX_WRT_CMD(0xC800);//NOT USE RFXX_WRT_CMD(0xC040);//1.66MHz,2.2V unsigned char RF12_RECV(void) unsigned int FIFO_data; WAIT_IRQ_LOW(); RFXX_WRT_CMD(0x0000); FIFO_data=RFXX_WRT_CMD(0xB000); return(fifo_data&0x00ff); void Delay_ms(unsigned char ams) unsigned char i; unsigned int j; for(i=0;i<ams;i++)for(j=0;j<914;j++); void main(void) unsigned char i; unsigned char ChkSum; RF12B Program //POWER ON indication: both LEDR and LEDG blink 3 times LEDG_OFF(); LEDR_OFF(); LEDG_OUTPUT(); LEDR_OUTPUT();
31 for(i=0;i<3;i++) Delay_ms(200); LEDG_ON(); LEDR_ON(); Delay_ms(200); LEDG_OFF(); LEDR_OFF(); RF12B Program LEDG_OFF(); LEDR_OFF(); //Initialize command port RFXX_PORT_INIT(); //Initialize RF12 chip RF12_INIT(); //Init FIFO RFXX_WRT_CMD(0xCA81); while(1) //Enable FIFO RFXX_WRT_CMD(0xCA83); ChkSum=0; //Receive payload data for(i=0;i<16;i++) ChkSum+=RF12_RECV(); //Receive Check sum i=rf12_recv(); //Disable FIFO RFXX_WRT_CMD(0xCA81); //Package chkeck if(chksum==i) LEDG_ON(); Delay_ms(200); LEDG_OFF();
32 RF12B Program 5. Example 2(for PIC microcontroller) RF12 transmitter demo: /********************************************************** copyright (c) 2006 Title: RFM12A transmitter simple example based on PIC C Current version: v1.0 Function: Package send Demo Processor PIC16F73 DIP-28 Clock: 10MHz Crystal Operate frequency: 434MHz Data rate: 4.8kbps Package size: 23byte Author: Robben Company: Hope microelectronic Co.,Ltd. Contact: [email protected] Date: ********************************************************/ #include "pic.h" typedef unsigned char uchar; typedef unsigned int uint;
33 #define SDI #define SDO #define SCK #define nsel RB7 RB6 RB5 RB4 RF12B Program #define SDI_OUT() #define SDO_IN() #define SCK_OUT() #define nsel_out() TRISB7=0 TRISB6=1 TRISB5=0 TRISB4=0 void Init_RF12(void); void Write0( void ); void Write1( void ); void WriteCMD( uint CMD ); void DelayUs( uint us ); void DelayMs(uint ms); 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);//enable register,433mhz,12.5pf WriteCMD(0x8208);//Turn on crystal,!pa WriteCMD(0xA640);// WriteCMD(0xC647);// WriteCMD(0x94C0);//VDI,FAST,134kHz,0dBm,-103dBm WriteCMD(0xC2AC); WriteCMD(0xCA80); WriteCMD(0xCED4); WriteCMD(0xCA83);//FIFO8,SYNC, WriteCMD(0xC49B); WriteCMD(0x9850);//!mp,90kHz,MAX OUT WriteCMD(0xCC77); WriteCMD(0xE000);//NOT USE WriteCMD(0xC80E);//NOT USE WriteCMD(0xC000);//1.0MHz,2.2V
34 RF12B Program void main() uint ChkSum=0; Init_RF12(); while(1) WriteCMD(0x8228); DelayUs( 4 ); WriteCMD(0x8238); WriteFSKbyte( 0xAA ); WriteFSKbyte( 0xAA ); WriteFSKbyte( 0xAA ); WriteFSKbyte( 0x2D ); WriteFSKbyte( 0xD4 ); //OPEN PA 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 );
35 ChkSum+=0x3C; WriteFSKbyte(0x3D); ChkSum+=0x3D; WriteFSKbyte( 0x3E ); ChkSum+=0x3E; WriteFSKbyte( 0x3F );//DATA15 ChkSum+=0x3F; ChkSum&=0x0FF; WriteFSKbyte( ChkSum ); WriteFSKbyte( 0xAA ); WriteCMD( 0x8208 ); //CLOSE PA DelayMs(1000); RF12B Program void Write0( void ) SDI=0; SCK=0; SCK=1; void Write1( void ) SDI=1; SCK=0;
36 SCK=1; RF12B Program void WriteCMD( uint CMD ) uchar n=16; SCK=0; nsel=0; while(n--) if(cmd&0x8000) Write1(); else Write0(); CMD=CMD<<1; SCK=0; nsel=1; void WriteFSKbyte( uchar DATA ) uchar RGIT=0; uint temp=0xb800; temp =DATA; Loop: SCK=0;
37 nsel=0; SDI=0; SCK=1; if(sdo) RGIT=1; else RGIT=0; SCK=0; SDI=1; nsel=1; if(rgit==0) goto Loop; else RGIT=0; WriteCMD(temp); //Polling SDO RF12B Program void DelayUs( uint us ) uint i; while( us-- ) i=2; while( i-- ) void DelayMs(uint ms) uchar i; while(ms--)
38 i=35; while(i--) DelayUs(1); RF12B Program RF12 receiver demo: /********************************************************** copyright (c) 2006 Title: RFM12A transmitter simple example based on PIC C Current version: v1.0 Function: Package send Demo Processor PIC16F73 DIP-28 Clock: 10MHz Crystal Operate frequency: 434MHz Data rate: 4.8kbps Package size: 23byte Author: Robben Company: Hope microelectronic Co.,Ltd. Contact: [email protected] Date: ********************************************************/ #include "pic.h" typedef unsigned char uchar; typedef unsigned int uint; #define SDI #define SDO #define SCK #define nsel #define nirq #define LED #define LED_OUT() #define nirq_in() #define SDI_OUT() #define SDO_IN() #define SCK_OUT() #define nsel_out() RB7 RB6 RB5 RB4 RB3 RA0 TRISA0=0 TRISB3=1 TRISB7=0 TRISB6=1 TRISB5=0 TRISB4=0
39 RF12B Program void Init_RF12(void); void Write0( void ); void Write1( void ); void WriteCMD( uint CMD ); uchar RF12_RDFIFO(void); void Delayus( uint us ); CONFIG(0x3FF2); bank1 uchar RF_RXBUF[19]; void 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);//enable register,433mhz,12.5pf WriteCMD(0x82D8);//enable receive,!pa WriteCMD(0xA640);// WriteCMD(0xC647);// WriteCMD(0x94C0);//VDI,FAST,134kHz,0dBm,-103dBm WriteCMD(0xC2AC); WriteCMD(0xCA80); WriteCMD(0xCED4); WriteCMD(0xCA83);//FIFO8,SYNC, WriteCMD(0xC49B); WriteCMD(0x9850);//!mp,90kHz,MAX OUT WriteCMD(0xCC77); WriteCMD(0xE000);//NOT USE WriteCMD(0xC800);//NOT USE WriteCMD(0xC000);//1.0MHz,2.2V void main() uchar i=0,j=0;
40 uint CheckSum; RF12B Program Init_RF12(); while(1) while(!nirq) RF_RXBUF[i++]=RF12_RDFIFO(); if(i==17) 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 x3F CheckSum&=0x0FF; if(checksum==rf_rxbuf[16]) LED=1; Delayus(1); LED=0; void Write0( void ) SDI=0; SCK=0;
41 SCK=1; RF12B Program void Write1( void ) SDI=1; SCK=0; SCK=1; void WriteCMD( uint CMD ) uchar n=16; SCK=0; nsel=0; while(n--) if(cmd&0x8000) Write1(); else Write0();
42 CMD=CMD<<1; SCK=0; nsel=1; RF12B Program uchar RF12_RDFIFO(void) uchar i,result; SCK=0; SDI=0; nsel=0; for(i=0;i<16;i++) //skip status bits SCK=1; SCK=0; Result=0; for(i=0;i<8;i++) //read fifo data byte Result=Result<<1; if(sdo) Result =1; SCK=1; SCK=0; nsel=1; return(result); void Delayus( uint us ) uint i;
43 while( us-- ) i=1000; while( i-- ) RF12B Program
44 HOPE MICROELECTRONICS CO.,LTD Address: Rm B.8/F LiJingGe Emperor Regency 6012 ShenNan Rd, Shenzhen, China Tel: Fax: Website: RF12B Program 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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