0,0 → 1,245 |
/* mija 2008 |
demo for RFM01 - RX 868MHz |
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CPU ATMEGA8 |
fcpu = 1MHz |
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!! define PIN,PORT,DDR for IOpin !! |
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tested with module RFM12B - TX,9600,Fdev 15kHz |
*/ |
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#include <avr/io.h> |
#include <util/delay.h> |
#include "RFM01.h" |
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//************************************************************************ |
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#define SDI PB3 |
#define SDI_PORT PORTB |
#define SDI_DDR DDRB |
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#define FSK PC1 |
#define FSK_PORT PORTC |
#define FSK_DDR DDRC |
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#define SDO PB4 // input for mega |
#define SDO_PORT PORTB |
#define SDO_DDR DDRB |
#define SDO_PIN PINB |
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#define SCK PB5 |
#define SCK_PORT PORTB |
#define SCK_DDR DDRB |
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#define nIRQ PD2 // input for mega |
#define nIRQ_PORT PORTD |
#define nIRQ_DDR DDRD |
#define nIRQ_PIN PIND |
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#define nSEL PB2 |
#define nSEL_PORT PORTB |
#define nSEL_DDR DDRB |
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#define LED PD3 |
#define LED_PORT PORTD |
#define LED_DDR DDRD |
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// interni |
#define SDI_H SDI_PORT |= _BV(SDI) |
#define SDI_L SDI_PORT &= (~(_BV(SDI))) |
#define SDI_INIT SDI_DDR |= _BV(SDI) |
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#define FSK_H FSK_PORT |= _BV(FSK) |
#define FSK_L FSK_PORT &= (~(_BV(FSK))) |
#define FSK_INIT FSK_DDR |= _BV(FSK) |
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#define SDO_INPUT (SDO_PIN & _BV(SDO)) |
#define SDO_INIT SDO_DDR &= (~(_BV(SDO))) |
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#define SCK_H SCK_PORT |= _BV(SCK) |
#define SCK_L SCK_PORT &= (~(_BV(SCK))) |
#define SCK_INIT SCK_DDR |= _BV(SCK) |
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#define nIRQ_INPUT (nIRQ_PIN & _BV(nIRQ)) |
#define nIRQ_INIT nIRQ_DDR &= (~(_BV(nIRQ))) |
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#define nSEL_H nSEL_PORT |= _BV(nSEL) |
#define nSEL_L nSEL_PORT &= (~(_BV(nSEL))) |
#define nSEL_INIT nSEL_DDR |= _BV(nSEL) |
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#define LED_H LED_PORT |= _BV(LED) |
#define LED_L LED_PORT &= (~(_BV(LED))) |
#define LED_INIT LED_DDR |= _BV(LED) |
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#define START_FIFO RF_WRITE_CMD(CMD_FIFO|FIFO_8|FIFO_VDI_WORD|FIFO_FF|FIFO_FE) |
#define STOP_FIFO RF_WRITE_CMD(CMD_FIFO) |
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//************************************************************************ |
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uint8_t rx_buf[16]; |
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//************************************************************************ |
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void delay_ms(uint16_t time) |
{ |
while(time--) _delay_ms(1); |
} |
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void IO_INIT(void) |
{ |
SDI_INIT; |
SDO_INIT; |
SCK_INIT; |
nIRQ_INIT; |
nSEL_INIT; |
FSK_INIT; |
LED_INIT; |
} |
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void RF_INIT(void) |
{ |
nSEL_H; |
SDI_H; |
SCK_L; |
nIRQ_INPUT; |
SDO_INPUT; |
FSK_H; |
} |
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uint16_t RF_WRITE_CMD(uint16_t cmd) |
{ |
uint8_t i; |
uint16_t temp; |
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SCK_L; |
nSEL_L; |
temp=0; |
for (i=0;i<16;i++) |
{ |
if (cmd & 0x8000) SDI_H; |
else SDI_L; |
SCK_H; |
cmd <<= 1; |
temp <<= 1; |
if(SDO_INPUT) temp |= 0x0001; |
SCK_L; |
} |
SCK_L; |
nSEL_H; |
return (temp); |
} |
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void RF_WRITE_DATA(uint8_t data) |
{ |
while (nIRQ_INPUT); |
RF_WRITE_CMD(0xB800 + data); |
} |
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uint8_t RF_READ_DATA(void) |
{ |
uint8_t i,result; |
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while (nIRQ_INPUT); |
SCK_L; |
nSEL_L; |
SDI_L; |
result=0; |
for (i=0;i<24;i++) |
{ |
result <<= 1; |
if (SDO_INPUT) result |= 0x01; |
SCK_H; |
SCK_L; |
} |
nSEL_H; |
return (result); |
} |
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void RS232_INIT(void) |
{ |
//set baud rate 9600 8N1 for Fosc 1MHz |
UBRRH = 0; |
UBRRL = 12; |
UCSRB = (1<<RXEN)|(1<<TXEN); //enable RX TX |
UCSRC = (1<<URSEL) |(3<<UCSZ0); //8N1 |
UCSRA |= _BV(U2X); |
} |
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void put_rs232(char data) |
{ |
// Wait for empty transmit buffer |
while ( !( UCSRA & (1<<UDRE)) ); |
// Put data into buffer, sends the data |
UDR = data; |
} |
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int main() |
{ |
uint8_t i,ChkSum; |
uint8_t LED_TRG; |
uint8_t b; |
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IO_INIT(); |
RS232_INIT(); |
RF_INIT(); |
delay_ms(100); |
LED_L; |
LED_TRG=0; |
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RF_WRITE_CMD(CMD_SETTING |BAND_868 | C_12pF | BANDWIDTH_67 | SETTING_DC); |
RF_WRITE_CMD(CMD_FREQUENCY |FREQUENCY_868); |
RF_WRITE_CMD(CMD_RATE |RATE_9600); |
RF_WRITE_CMD(CMD_FILTER |FILTER_AL | FILTER_S0 | DQD_4); |
RF_WRITE_CMD(CMD_AFC |AFC_POWER_ON | AFC_RANG_8 | AFC_ST | AFC_OE | AFC_EN); |
RF_WRITE_CMD(CMD_RX); |
RF_WRITE_CMD(CMD_RX |VDI_CLOCK | LNA_GAIN_0 | DRSSI_103 | RX_EN); |
RF_WRITE_CMD(CMD_FIFO); |
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while (1) |
{ |
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START_FIFO; |
ChkSum = 0; |
for (i=0;i<16;i++) |
{ |
b = RF_READ_DATA(); |
rx_buf[i] = b; |
ChkSum += b; |
} |
b = RF_READ_DATA(); |
RF_READ_DATA(); |
STOP_FIFO; |
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for (i=0;i<16;i++) |
{ |
put_rs232(rx_buf[i]); |
delay_ms(2); |
} |
if (ChkSum == b) |
{ |
LED_TRG = ~ LED_TRG; |
put_rs232(' '); |
put_rs232('o'); |
put_rs232('k'); |
} |
else |
{ |
put_rs232('\n'); |
delay_ms(2); |
put_rs232('\r'); |
delay_ms(2); |
put_rs232('e'); |
put_rs232('r'); |
put_rs232('r'); |
} |
if (LED_TRG) LED_H; |
else LED_L; |
} |
return 0; |
} |
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