/Designs/HOPEwireless/SW_RX_RFM01/atmel/RX_RFM01.c
0,0 → 1,245
/* mija 2008
demo for RFM01 - RX 868MHz
CPU ATMEGA8
fcpu = 1MHz
 
!! define PIN,PORT,DDR for IOpin !!
 
tested with module RFM12B - TX,9600,Fdev 15kHz
*/
 
#include <avr/io.h>
#include <util/delay.h>
#include "RFM01.h"
 
//************************************************************************
 
#define SDI PB3
#define SDI_PORT PORTB
#define SDI_DDR DDRB
 
#define FSK PC1
#define FSK_PORT PORTC
#define FSK_DDR DDRC
 
#define SDO PB4 // input for mega
#define SDO_PORT PORTB
#define SDO_DDR DDRB
#define SDO_PIN PINB
 
#define SCK PB5
#define SCK_PORT PORTB
#define SCK_DDR DDRB
 
#define nIRQ PD2 // input for mega
#define nIRQ_PORT PORTD
#define nIRQ_DDR DDRD
#define nIRQ_PIN PIND
 
#define nSEL PB2
#define nSEL_PORT PORTB
#define nSEL_DDR DDRB
 
#define LED PD3
#define LED_PORT PORTD
#define LED_DDR DDRD
 
// interni
#define SDI_H SDI_PORT |= _BV(SDI)
#define SDI_L SDI_PORT &= (~(_BV(SDI)))
#define SDI_INIT SDI_DDR |= _BV(SDI)
 
#define FSK_H FSK_PORT |= _BV(FSK)
#define FSK_L FSK_PORT &= (~(_BV(FSK)))
#define FSK_INIT FSK_DDR |= _BV(FSK)
 
#define SDO_INPUT (SDO_PIN & _BV(SDO))
#define SDO_INIT SDO_DDR &= (~(_BV(SDO)))
 
#define SCK_H SCK_PORT |= _BV(SCK)
#define SCK_L SCK_PORT &= (~(_BV(SCK)))
#define SCK_INIT SCK_DDR |= _BV(SCK)
 
#define nIRQ_INPUT (nIRQ_PIN & _BV(nIRQ))
#define nIRQ_INIT nIRQ_DDR &= (~(_BV(nIRQ)))
 
#define nSEL_H nSEL_PORT |= _BV(nSEL)
#define nSEL_L nSEL_PORT &= (~(_BV(nSEL)))
#define nSEL_INIT nSEL_DDR |= _BV(nSEL)
 
#define LED_H LED_PORT |= _BV(LED)
#define LED_L LED_PORT &= (~(_BV(LED)))
#define LED_INIT LED_DDR |= _BV(LED)
 
#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)
 
//************************************************************************
 
uint8_t rx_buf[16];
 
//************************************************************************
 
void delay_ms(uint16_t time)
{
while(time--) _delay_ms(1);
}
 
void IO_INIT(void)
{
SDI_INIT;
SDO_INIT;
SCK_INIT;
nIRQ_INIT;
nSEL_INIT;
FSK_INIT;
LED_INIT;
}
 
void RF_INIT(void)
{
nSEL_H;
SDI_H;
SCK_L;
nIRQ_INPUT;
SDO_INPUT;
FSK_H;
}
 
uint16_t RF_WRITE_CMD(uint16_t cmd)
{
uint8_t i;
uint16_t temp;
 
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);
}
 
void RF_WRITE_DATA(uint8_t data)
{
while (nIRQ_INPUT);
RF_WRITE_CMD(0xB800 + data);
}
 
uint8_t RF_READ_DATA(void)
{
uint8_t i,result;
 
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);
}
 
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);
}
 
void put_rs232(char data)
{
// Wait for empty transmit buffer
while ( !( UCSRA & (1<<UDRE)) );
// Put data into buffer, sends the data
UDR = data;
}
 
int main()
{
uint8_t i,ChkSum;
uint8_t LED_TRG;
uint8_t b;
 
IO_INIT();
RS232_INIT();
RF_INIT();
delay_ms(100);
LED_L;
LED_TRG=0;
 
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);
 
while (1)
{
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;
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;
}