| 0,0 → 1,135 |
|---|
| /* mija 2008 |
| demo for RFM01 - RX 868MHz |
| |
| PIC 16F876A |
| xtal = 4MHz |
| */ |
| #include "RX_RFM01.h" |
| |
| //************************************************************************ |
| |
| #define SDI PIN_B0 |
| #define SCK PIN_B1 |
| #define SDO PIN_B2 // input for PIC |
| #define nIRQ PIN_B3 |
| #define nSEL PIN_B4 |
| #define LED PIN_B5 |
| |
| //************************************************************************ |
| unsigned char RF_RXBUF[22]; |
| int1 led_trg; |
| |
| //************************************************************************ |
| |
| void RF_INIT(void) |
| { |
| output_high(nSEL); |
| output_high(SDI); |
| output_low(SCK); |
| input(SDO); |
| } |
| |
| void RF_WRITE_CMD(unsigned int16 cmd) |
| { |
| unsigned int8 i; |
| |
| output_low(SCK); |
| output_low(nSEL); |
| for (i=0;i<16;i++) |
| { |
| output_low(SCK); |
| if (cmd & 0x8000) output_high(SDI); |
| else output_low(SDI); |
| output_high(SCK); |
| cmd <<= 1; |
| } |
| output_low(SCK); |
| output_high(nSEL); |
| } |
| |
| int8 RF_RDFIFO(void) |
| { |
| unsigned int8 i,Result; |
| |
| output_low(SCK); |
| output_low(nSEL); |
| output_low(SDI); |
| for (i=0;i<16;i++) // skip satus bits |
| { |
| output_high(SCK); |
| output_high(SCK); |
| output_low(SCK); |
| output_low(SCK); |
| } |
| Result = 0; |
| for (i=0;i<8;i++) |
| { |
| Result <<= 1; |
| if (input(SDO)) Result |= 1; |
| output_high(SCK); |
| output_high(SCK); |
| output_low(SCK); |
| output_low(SCK); |
| } |
| output_high(nSEL); |
| return Result; |
| } |
| |
| void main() |
| { |
| unsigned int8 i,j,ChkSum; |
| |
| setup_adc_ports(NO_ANALOGS); |
| setup_adc(ADC_OFF); |
| setup_spi(SPI_MASTER|SPI_L_TO_H|SPI_CLK_DIV_4); |
| setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1); |
| setup_timer_1(T1_DISABLED); |
| setup_timer_2(T2_DISABLED,0,1); |
| setup_comparator(NC_NC_NC_NC); |
| setup_vref(FALSE); |
| |
| output_high(LED); |
| delay_ms(1000); |
| output_low(LED); |
| |
| RF_INIT(); |
| |
| RF_WRITE_CMD(0x0000); |
| RF_WRITE_CMD(0x918A); // 868BAND,134kHz |
| RF_WRITE_CMD(0xA640); // 876Mhz |
| RF_WRITE_CMD(0xC847); // 4.8kbps |
| RF_WRITE_CMD(0xC69B); // AFC setting |
| RF_WRITE_CMD(0xC42A); // Clock recovery manualcontrol,Dig. filter, DQD=4 |
| RF_WRITE_CMD(0xC240); // output 1.66Mhz |
| RF_WRITE_CMD(0xC080); |
| RF_WRITE_CMD(0xCE88); // use FIFO 8bit |
| RF_WRITE_CMD(0xCE8B); |
| RF_WRITE_CMD(0xC081); // open RX |
| |
| led_trg = 0; |
| i = 0; |
| while (1) |
| { |
| while (!input(nIRQ)) |
| { |
| RF_RXBUF[i++] = RF_RDFIFO(); |
| putc(RF_RXBUF[i-1]); |
| if (i == 18) |
| { |
| i = 0; |
| RF_WRITE_CMD(0xCE88); |
| RF_WRITE_CMD(0xCE8B); |
| ChkSum = 0; |
| for (j=0;j<16;j++) ChkSum += RF_RXBUF[j]; |
| if (ChkSum == RF_RXBUF[16]) |
| { |
| led_trg = ~led_trg; |
| output_bit(LED,led_trg); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| |