RF22 TX Program V1.2

#define RF22_PWRSTATE_READY 01
#define RF22_PWRSTATE_TX 0x09
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RF22 TX Program V1.2
/******************************************************************************
Title: RFM22 transmitter demo program
Current version: V1.2
Function: Package send Demo
Processor PIC16F690 DIP-20
Clock: internal 8M.
Operate frequency: 434MHz
Data rate: 2.4kbps
modulation: FSK
deviation: 45K
bandwidth: 94.8K
frame mode: PH + FIFO
payload 0x30, 0x31...0x3f, 0x78(chksum)
Author : Simon.Yang
Company: HopeRF microelectroni
Contact: +86-0755-82973806
Date: 2010-07-14
The example is only for your reference.
******************************************************************************/
#include
typedef unsigned char uchar;
typedef unsigned int uint;
const uchar tx_buf[17] =
{0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,0x78};
// ch8 is 140
1

#define RF22_PACKET_SENT_INTERRUPT 04
#define RF22_PWRSTATE_POWERDOWN 00
#define nIRQ RA2
#define nSEL RC6
#define SDO RC7
#define SDI RB4
#define LED_RED RB5
#define SCK RB6
#define TXEN RA4
#define RXEN RA5
uchar count_50hz;
uchar ItStatus1, ItStatus2;
typedef struct
{
uchar reach_1s : 1;
} FlagType;
FlagType Flag;
uchar read_8bit_data(void);
void to_tx_mode(void);
void to_ready_mode(void);
void send_8bit_data(uchar i);
void send_read_address(uchar i);
void spi_write(uchar address, uchar data);
void RF22_init_parameter(void);
void delay_50ms(void);
void delay_5ms(void);
void delay_1ms(void);
void port_init(void);
void power_on_delay(void);
uchar spi_read(uchar address);
void Write0( void );
void Write1( void );
void timer2_init(void);
void Write8bitcommand(uchar command);
void to_sleep_mode(void);
__CONFIG(0x3F04);
RF22 TX Program V1.2
//*****************************************************************************
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2
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void main()
{
uchar i,j,chksum;
OSCCON = 0X70; // 8M crystal
WDTCON = 0X00;
power_on_delay();
port_init();
timer2_init();
count_50hz = 0;
Flag.reach_1s = 0;
INTCON = 0xc0; // enable interrupt
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RF22 TX Program V1.2
RF22_init_parameter();
while(1)
{
//to_sleep_mode(); //enter sleep mode
if(Flag.reach_1s)
{
Flag.reach_1s = 0;
to_tx_mode(); // TRANSIMITTE DATA
}
}
}
//*****************************************************************************
//-------------------------------------------------------------void
Write0( void )
{
SCK=0;
NOP();
SDI=0;
NOP();
SCK=1;
NOP();
}
//-------------------------------------------------------------void
Write1( void )
{
SCK=0;
NOP();
3

SDI=1;
NOP();
SCK=1;
NOP();
}
//-------------------------------------------------------------void
Write8bitcommand(uchar command) // keep sel to low
{
uchar n=8;
nSEL = 1;
SCK=0;
nSEL=0;
while(n--)
{
if(command&0x80)
Write1();
else
Write0();
command = command

{
uchar i;
for(i = 0; i

RF22 TX Program V1.2
}
//-------------------------------------------------------------void
power_on_delay(void)
{
uint i;
for(i = 0; i

and 434
spi_write(0x75, 0x53); // hbsel = 0, sbsel =1 ???, fb = 19
spi_write(0x76, 0x64); // 25600= 0x6400 for 434Mhz
spi_write(0x77, 0x00);
}
//-------------------------------------------------------------void
spi_write(uchar address, uchar data)
{
address |= 0x80;
Write8bitcommand(address);
send_8bit_data(data);
nSEL = 1;
}
//-------------------------------------------------------------void
send_read_address(uchar i)
{
i &= 0x7f;
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RF22 TX Program V1.2
for byte 0, 1,2,3
spi_write(0x33, 0x42); // header 3, 2, 1,0 used for head length, fixed packet length,
synchronize word length 3, 2,
spi_write(0x34, 64); // 64 nibble = 32byte preamble
spi_write(0x36, 0x2d); // synchronize word
spi_write(0x37, 0xd4);
spi_write(0x38, 0x00);
spi_write(0x39, 0x00);
spi_write(0x3a, 's'); // tx header
spi_write(0x3b, 'o');
spi_write(0x3c, 'n');
spi_write(0x3d, 'g');
spi_write(0x3e, 17); // total tx 17 byte
// 0x52, 53, 54, 55 set to default
// 0x56 ---------0x6c ??????????????????????????
spi_write(0x6d, 0x0f); // set power max power
spi_write(0x79, 0x0); // no hopping
spi_write(0x7a, 0x0); // no hopping
spi_write(0x71, 0x22); // Gfsk, fd[8] =0, no invert for Tx/Rx data, fifo mode, txclk -->gpio
spi_write(0x72, 0x38); // frequency deviation setting to 45k = 72*625
spi_write(0x73, 0x0);
spi_write(0x74, 0x0); // no offset
7

Write8bitcommand(i);
}
//-------------------------------------------------------------void
send_8bit_data(uchar i)
{
uchar n = 8;
SCK=0;
while(n--)
{
if(i&0x80)
Write1();
else
Write0();
i = i

RF22 TX Program V1.2
//delay_50ms();
RXEN = 0;
TXEN = 1;
spi_write(0x08, 0x03); // disABLE AUTO TX MODE, enble multi packet clear fifo
spi_write(0x08, 0x00); // disABLE AUTO TX MODE, enble multi packet, clear fifo
// ph +fifo mode
spi_write(0x34, 64); // 64 nibble = 32byte preamble
spi_write(0x3e, 17); // total tx 17 byte
for (i = 0; i

{
;
}
}
//--------------------------------------------------------------
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RF22 TX Program V1.2
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