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