/**
* @fn void rfm12_init
* @brief initializes the rfm12 radio module
* @brief 868,3MHz,4,8kbps, 0db power
* @param
*/
void rfm12_init(void){
unsigned int d;
// set port direction
nSEL_OUT();
SDI_IN();
SDO_OUT();
SCK_OUT();
nIRQ_IN();
// default signals
nSEL=1;
SDO=1;
SCK=0;
d=rfm12_spi16(0x80e7); // El, Ef, 11.5pF, 868MHz band
d=rfm12_spi16(0x82d9); // !er, !ebb, Et, Es, Ex, !eb, !ew, Dc
d=rfm12_spi16(0xa67c); // 434,15MHz/868,3MHz
d=rfm12_spi16(0xc647); // 4,8kbps
d=rfm12_spi16(0x94a0); // Vdi, fast, 134kHz, 0db,-103dbm
d=rfm12_spi16(0xc2ac); // Al, !ml, Dig, Dqd4
d=rfm12_spi16(0xca80); // fifo8, sync, !ff, Dr
d=rfm12_spi16(0xca83); // fifo8, sync, !ff, Dr
d=rfm12_spi16(0xc483); // @pwr, no restrict, !st, !fi, Oe, En
d=rfm12_spi16(0x9850); // 90kHz, power - 0db
d=rfm12_spi16(0xe000); // not used (wake-up timer cmd)
d=rfm12_spi16(0xc800); // not used (low duty-cycle cmd)
d=rfm12_spi16(0xc000); // 1MHz, 2.2V (low bat detector and clk div)
d=rfm12_spi16(0x0000); // read status word to clear fifos
}
void init(void)
{
//osccon = 0x70; // 8Mhz internal OSC
cmcon = 0x07;
//ansel = 0; // all is digital i/o on PortA
option_reg.NOT_RBPU = 0; // enable pullup resistors on PB
option_reg.INTEDG = 0; // falling edge interrupt
CONF_LED1_OUT();
LED1=0;
// setup SPI
// outputs
RFM12_CS_OUT(); // Module Chip Select
HI_SEL(); // RF CS is Active Low so set High
SCK_OUT(); // SPI SCK as Output
LOW_SCK();
SDO_OUT(); // SPI SDO as Output
LOW_SDO();
// inputs
RFM12_nIRQ_IN(); // nIRQ
SDI_IN(); // SPI SDI
delay_ms(500); // Wait for RFM12 POR
WriteCMD(0x80F7); // 915 EL, EF, 12.0pf
WriteCMD(0xA7D0); // 915=A7D0 904.50MHZ = A258
WriteCMD(0xC623); // c608=38400 c611=19200 c623= 9600bps
WriteCMD(0xC22C); // Data Filter: AL, !ML, digital filter, 4 dqd
WriteCMD(0xC4F7); // AFC Autotune, -10khz..+7.5Khz, !st, !fi, OE, EN
WriteCMD(0x96A0); // P16, VDI, FAST, 65khz, 0dBm, -103dBm
WriteCMD(0xCA81); // FIFO8, SYNC, !ff, DR
//TX Config
//WriteCMD(0x9850); // !mp, 9810=30Khz, MAX out
WriteCMD(0xE000); // NOT USE
WriteCMD(0xC80E); // NOT USE
WriteCMD(0xC000); // CLK 1mhz, 2.2v
WriteCMD(0x8280); // ER, EBB, !ET, ES, EX, !EB, !EW, !DC
}
