| 0,0 → 1,220 |
|---|
| /* mija 2008 |
| demo for RFM12B - RX 868MHz |
| |
| CPU ATMEGA8 |
| fcpu = 1MHz |
| |
| !! define PIN,PORT,DDR for IOpin !! |
| */ |
| |
| #include <avr/io.h> |
| #include <util/delay.h> |
| #include "RFM12B.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_FF|FIFO_DR) |
| #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) |
| { |
| while (nIRQ_INPUT); |
| RF_WRITE_CMD(0x0000); |
| return (0x00FF & RF_WRITE_CMD(0xB000)); |
| } |
| |
| |
| 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,j,ChkSum; |
| uint8_t LED_TRG; |
| uint8_t b; |
| |
| IO_INIT(); |
| RF_INIT(); |
| RS232_INIT(); |
| LED_H; |
| delay_ms(1000); |
| LED_L; |
| LED_TRG=0; |
| |
| RF_WRITE_CMD(CMD_SETTING |SETTING_EL |SETTING_EF |BAND_868 |C_12pF ); |
| RF_WRITE_CMD(CMD_POWER |POWER_ER |POWER_EBB |POWER_ES |POWER_EX |POWER_DC); |
| RF_WRITE_CMD(CMD_FREQUENCY |FREQUENCY_868 ); |
| RF_WRITE_CMD(CMD_RATE |RATE_9600 ); |
| RF_WRITE_CMD(CMD_RX |RX_P16 |VDI_FAST |BANDWIDTH_67|LNA_GAIN_0|DRSSI_103); |
| RF_WRITE_CMD(CMD_FILTER |FILTER_AL |DQD_4 ); |
| RF_WRITE_CMD(CMD_FIFO |FIFO_8 |FIFO_DR ); |
| RF_WRITE_CMD(CMD_SYNCFIFO |0xD4 ); |
| RF_WRITE_CMD(CMD_AFC |AFC_POWER_ON|AFC_RANG_8|AFC_ST |AFC_OE |AFC_EN ); |
| //RF_WRITE_CMD(CMD_TX |TX_DEV_120 |TX_POWER_0 ); |
| RF_WRITE_CMD(CMD_PLL |PLL_CLK_25 |PLL_LPX |PLL_DDIT |PLL_BW0 ); |
| |
| 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; |
| else put_rs232('\f'); |
| if (LED_TRG) LED_H; |
| else LED_L; |
| } |
| return 0; |
| } |
| |
| |
| |