/*
 *  spreadspace avr utils
 *
 *
 *  Copyright (C) 2013-2015 Christian Pointner <equinox@spreadspace.org>
 *
 *  This file is part of spreadspace avr utils.
 *
 *  spreadspace avr utils is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  spreadspace avr utils is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>

#include "cc1101.h"
#include "cc1101_defines.h"

static cc1101_driver_conf_t drv = {
  .spi_cs_enable = NULL,
  .spi_cs_disable = NULL,
  .spi_read_miso = NULL,
  .spi_write_byte = NULL,
  .spi_read_byte = NULL,
  .spi_transfer_byte = NULL,
  .freq_corr = 1.0
};

static uint8_t const pa_table_values_[] = { 0x00, 0x30, 0x20, 0x10, 0x01, 0x02, 0x11, 0x03,
                    0x12, 0x04, 0x05, 0x13, 0x06, 0x07, 0x21, 0x14, 0x08, 0x09, 0x0A, 0x15,
                    0x0B, 0x31, 0x16, 0x0C, 0x0D, 0x0E, 0x17, 0x0F, 0x22, 0x18, 0x19, 0x1A,
                    0x1B, 0x32, 0x23, 0x1C, 0x6F, 0x1D, 0x1E, 0x1F, 0x24, 0x33, 0x25, 0x34,
                    0x26, 0x6E, 0x27, 0x35, 0x28, 0x6D, 0x6C, 0x29, 0x36, 0x6B, 0x2A, 0x6A,
                    0x37, 0x69, 0x2B, 0x68, 0x38, 0x2C, 0x8F, 0x67, 0x2D, 0x57, 0x39, 0x66,
                    0x2E, 0x56, 0x3A, 0x2F, 0x65, 0x55, 0x3B, 0x64, 0x54, 0x3C, 0x63, 0x3D,
                    0x53, 0x3E, 0x62, 0x3F, 0x52, 0x40, 0x61, 0x51, 0x60, 0x50, 0x8E, 0x8D,
                    0x8C, 0xCF, 0x8B, 0x8A, 0x89, 0x88, 0x87, 0x86, 0x85, 0xCE, 0x84, 0x83,
                    0xCD, 0x82, 0xCC, 0x81, 0xCB, 0x80, 0xCA, 0xC9, 0xC8, 0xC7, 0xC6, 0xC5,
                    0xC4, 0xC3, 0xC2, 0xC1, 0xC0 };

#define PA_TABLE_VALUES_MAX ((sizeof(pa_table_values_)/sizeof(uint8_t))-1)

/*
 * internal functions
 */

static inline void cc1101_spi_wait_rdy(void)
{
  while(drv.spi_read_miso()); // wait for CHP_RDY to go low, TODO: timeout...
}

static uint8_t cc1101_spi_strobe_command(const uint8_t cmd)
{
  if(cmd < CC1101_CMD_MIN || cmd > CC1101_CMD_MAX)
    return -1;

  drv.spi_cs_enable();
  cc1101_spi_wait_rdy();

  uint8_t status = drv.spi_transfer_byte(CC1101_HEADER_COMMAND | cmd);

  drv.spi_cs_disable();
  return status;
}

static uint8_t cc1101_spi_read_register(const uint8_t addr)
{
  if(addr > CC1101_ADDR_MAX)
    return 0xFF;

  uint8_t hdr = addr;
  if(addr >= CC1101_REG_RO_MIN && addr <= CC1101_REG_RO_MAX)
    hdr |= CC1101_HEADER_READONLY;
  else
    hdr |= CC1101_HEADER_READ;

  drv.spi_cs_enable();
  cc1101_spi_wait_rdy();

  drv.spi_write_byte(hdr);
  uint8_t data = drv.spi_read_byte();

  drv.spi_cs_disable();
  return data;
}

static void cc1101_spi_write_register(const uint8_t addr, const uint8_t data)
{
  if(addr > CC1101_REG_RW_MAX && addr != CC1101_REG_PATABLE && addr != CC1101_REG_FIFO)
    return;

  drv.spi_cs_enable();
  cc1101_spi_wait_rdy();

  drv.spi_write_byte(CC1101_HEADER_WRITE | addr);
  drv.spi_write_byte(data);

  drv.spi_cs_disable();
}

// this is an internal-internal function - never use this outside of internal functions
static uint8_t cc1101_spi_read_register_burst_raw(const uint8_t addr, uint8_t* data, const uint8_t l)
{
  drv.spi_cs_enable();
  cc1101_spi_wait_rdy();

  drv.spi_write_byte(CC1101_HEADER_READ | CC1101_HEADER_BURST | addr);
  uint8_t i;
  for(i = 0; i < l; ++i)
    data[i] = drv.spi_read_byte();

  drv.spi_cs_disable();
  return i;
}

static uint8_t cc1101_spi_read_register_burst(const uint8_t addr, uint8_t* data, const uint8_t len)
{
  if(addr <= CC1101_REG_RW_MAX) {
    uint8_t l = (CC1101_REG_RW_MAX - addr) + 1;
    l = (len > l) ? l : len;
    return cc1101_spi_read_register_burst_raw(addr, data, l);

  } else if(CC1101_REG_PATABLE) {
    uint8_t l = (len > CC1101_PATABLE_SIZE) ? CC1101_PATABLE_SIZE : len;
    return cc1101_spi_read_register_burst_raw(addr, data, l);

  } else if(CC1101_REG_FIFO) {
    uint8_t l = (len > CC1101_FIFO_MAX_LEN) ? CC1101_FIFO_MAX_LEN : len;
    return cc1101_spi_read_register_burst_raw(addr, data, l);
  }
  return 0;
}

// this is an internal-internal function - never use this outside of internal functions
static uint8_t cc1101_spi_write_register_burst_raw(const uint8_t addr, uint8_t* data, const uint8_t l)
{
  drv.spi_cs_enable();
  cc1101_spi_wait_rdy();

  drv.spi_write_byte(CC1101_HEADER_WRITE | CC1101_HEADER_BURST | addr);
  uint8_t i;
  for(i = 0; i < l; ++i)
    drv.spi_write_byte(data[i]);

  drv.spi_cs_disable();
  return i;
}

static uint8_t cc1101_spi_write_register_burst(const uint8_t addr, uint8_t* data, const uint8_t len)
{
  if(addr <= CC1101_REG_RW_MAX) {
    uint8_t l = (CC1101_REG_RW_MAX - addr) + 1;
    l = (len > l) ? l : len;
    return cc1101_spi_write_register_burst_raw(addr, data, l);

  } else if(CC1101_REG_PATABLE) {
    uint8_t l = (len > CC1101_PATABLE_SIZE) ? CC1101_PATABLE_SIZE : len;
    return cc1101_spi_write_register_burst_raw(addr, data, l);

  } else if(CC1101_REG_FIFO) {
    uint8_t l = (len > CC1101_FIFO_MAX_LEN) ? CC1101_FIFO_MAX_LEN : len;
    return cc1101_spi_write_register_burst_raw(addr, data, l);
  }
  return 0;
}


/*
 * EXTERNAL INTERFACE
 */

void cc1101_init(cc1101_driver_conf_t conf)
{
  drv = conf;
  cc1101_soft_reset();
}

void cc1101_reg_init(void)
{
  cc1101_set_iocfg0(CC1101_GDO_CFG_3STATE);
  cc1101_set_iocfg1(CC1101_GDO_CFG_3STATE);
  cc1101_set_iocfg2(CC1101_GDO_CFG_3STATE);
}

void cc1101_soft_reset(void)
{
  cc1101_spi_strobe_command(CC1101_CMD_SRES);
}


void cc1101_powerdown(void)
{
  cc1101_spi_strobe_command(CC1101_CMD_SPWD);
}

void cc1101_idle(void)
{
  cc1101_spi_strobe_command(CC1101_CMD_SIDLE);
}

void cc1101_osc_off(void)
{
  cc1101_spi_strobe_command(CC1101_CMD_SXOFF);
}

void cc1101_calibrate(void)
{
  cc1101_spi_strobe_command(CC1101_CMD_SCAL);
}

void cc1101_fasttxon(void)
{
  cc1101_spi_strobe_command(CC1101_CMD_SFSTXON);
}

void cc1101_rx(void)
{
  cc1101_spi_strobe_command(CC1101_CMD_SRX);
}

void cc1101_tx(void)
{
  cc1101_spi_strobe_command(CC1101_CMD_STX);
}

char* cc1101_state_to_string(cc1101_state_t state)
{
  switch(state) {
  case sleep: return "sleep";
  case idle: return "idle";
  case xoff: return "xoff";
  case mancal: return "mancal";
  case fs_wakeup: return "fs_wakeup";
  case calibrate: return "calibrate";
  case settling: return "settling";
  case rx: return "rx";
  case txrx_settling: return "txrx_settling";
  case rxfifo_overflow: return "rxfifo_overflow";
  case fstxon: return "fstxon";
  case tx: return "tx";
  case rxtx_settling: return "rxtx_settling";
  case txfifo_underflow: return "txfifo_underflow";
  default: return "unknown";
  }
}

static cc1101_state_t cc1101_marcstate_to_state(uint8_t marcstate)
{
  switch(marcstate) {
  case CC1101_MARCSTATE_SLEEP: return sleep;
  case CC1101_MARCSTATE_IDLE: return idle;
  case CC1101_MARCSTATE_XOFF: return xoff;
  case CC1101_MARCSTATE_VCOON_MC:
  case CC1101_MARCSTATE_REGON_MC:
  case CC1101_MARCSTATE_MANCAL: return mancal;
  case CC1101_MARCSTATE_VCOON:
  case CC1101_MARCSTATE_REGON: return fs_wakeup;
  case CC1101_MARCSTATE_STARTCAL: return calibrate;
  case CC1101_MARCSTATE_BWBOOST:
  case CC1101_MARCSTATE_FS_LOCK:
  case CC1101_MARCSTATE_IFADCON: return settling;
  case CC1101_MARCSTATE_ENDCAL: return calibrate;
  case CC1101_MARCSTATE_RX:
  case CC1101_MARCSTATE_RX_END:
  case CC1101_MARCSTATE_RX_RST: return rx;
  case CC1101_MARCSTATE_TXRX_SWITCH: return txrx_settling;
  case CC1101_MARCSTATE_RXFIFO_OVERFLOW: return rxfifo_overflow;
  case CC1101_MARCSTATE_FSTXON: return fstxon;
  case CC1101_MARCSTATE_TX:
  case CC1101_MARCSTATE_TX_END: return tx;
  case CC1101_MARCSTATE_RXTX_SWITCH: return rxtx_settling;
  case CC1101_MARCSTATE_TXFIFO_UNDERFLOW: return txfifo_underflow;
  default: return unknown;
  }
}

cc1101_state_t cc1101_get_state(void)
{
  return cc1101_marcstate_to_state(cc1101_get_marcstate());
}





uint32_t cc1101_get_freq_hz(void)
{
  return (uint32_t)((float)(cc1101_get_freq()) * drv.freq_corr);
}

void cc1101_set_freq_hz(uint32_t hz)
{
  uint32_t freq = (uint32_t)((float)hz / drv.freq_corr);
  cc1101_set_freq(freq);
}



// normalized register access

uint8_t cc1101_get_iocfg0(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_IOCFG0) & CC1101_REG_RW_IOCFG0_MASK;
}

void cc1101_set_iocfg0(uint8_t iocfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_IOCFG0, iocfg & CC1101_REG_RW_IOCFG0_MASK);
}

uint8_t cc1101_get_iocfg1(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_IOCFG1) & CC1101_REG_RW_IOCFG1_MASK;
}

void cc1101_set_iocfg1(uint8_t iocfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_IOCFG1, iocfg & CC1101_REG_RW_IOCFG1_MASK);
}

uint8_t cc1101_get_iocfg2(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_IOCFG2) & CC1101_REG_RW_IOCFG2_MASK;
}

void cc1101_set_iocfg2(uint8_t iocfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_IOCFG2, iocfg & CC1101_REG_RW_IOCFG2_MASK);
}


uint8_t cc1101_get_fifothr(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_FIFOTHR) & CC1101_REG_RW_FIFOTHR_MASK;
}

void cc1101_set_fifothr(uint8_t fifothr)
{
  cc1101_spi_write_register(CC1101_REG_RW_FIFOTHR, fifothr & CC1101_REG_RW_FIFOTHR_MASK);
}


uint16_t cc1101_get_sync(void)
{
  uint8_t data[2];
  cc1101_spi_read_register_burst(CC1101_REG_RW_SYNC1, data, 2);

  uint16_t sync =  data[0] & CC1101_REG_RW_SYNC1_MASK;
  sync = sync << 8;
  sync |= data[1] & CC1101_REG_RW_SYNC0_MASK;
  return sync;
}

void cc1101_set_sync(uint16_t sync)
{
  cc1101_spi_write_register(CC1101_REG_RW_SYNC0, (uint8_t)(sync) & CC1101_REG_RW_SYNC0_MASK);
  sync = sync >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_SYNC1, (uint8_t)(sync) & CC1101_REG_RW_SYNC1_MASK);
}

uint8_t cc1101_get_pktlen(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_PKTLEN) & CC1101_REG_RW_PKTLEN_MASK;
}

void cc1101_set_pktlen(uint8_t len)
{
  cc1101_spi_write_register(CC1101_REG_RW_PKTLEN, len & CC1101_REG_RW_PKTLEN_MASK);
}

uint16_t cc1101_get_pktctrl(void)
{
  uint8_t data[2];
  cc1101_spi_read_register_burst(CC1101_REG_RW_PKTCTRL1, data, 2);

  uint16_t ctrl = data[0] & CC1101_REG_RW_PKTCTRL1_MASK;
  ctrl = ctrl << 8;
  ctrl |= data[1] & CC1101_REG_RW_PKTCTRL0_MASK;
  return ctrl;
}

void cc1101_set_pktctrl(uint16_t ctrl)
{
  cc1101_spi_write_register(CC1101_REG_RW_PKTCTRL0, (uint8_t)(ctrl) & CC1101_REG_RW_PKTCTRL0_MASK);
  ctrl = ctrl >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_PKTCTRL1, (uint8_t)(ctrl) & CC1101_REG_RW_PKTCTRL1_MASK);
}

uint8_t cc1101_get_addr(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_ADDR) & CC1101_REG_RW_ADDR_MASK;
}

void cc1101_set_addr(uint8_t addr)
{
  cc1101_spi_write_register(CC1101_REG_RW_ADDR, addr & CC1101_REG_RW_ADDR_MASK);
}


uint8_t cc1101_get_channr(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_CHANNR) & CC1101_REG_RW_CHANNR_MASK;
}

void cc1101_set_channr(uint8_t nr)
{
  cc1101_spi_write_register(CC1101_REG_RW_CHANNR, nr & CC1101_REG_RW_CHANNR_MASK);
}

uint8_t cc1101_get_iffreq(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_FSCTRL1) & CC1101_REG_RW_FSCTRL1_MASK;
}

void cc1101_set_iffreq(uint8_t iffreq)
{
  cc1101_spi_write_register(CC1101_REG_RW_FSCTRL1, iffreq & CC1101_REG_RW_FSCTRL1_MASK);
}

uint8_t cc1101_get_freq_offset(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_FSCTRL0) & CC1101_REG_RW_FSCTRL0_MASK;
}

void cc1101_set_freq_offset(uint8_t freqoff)
{
  cc1101_spi_write_register(CC1101_REG_RW_FSCTRL0, freqoff & CC1101_REG_RW_FSCTRL0_MASK);
}

uint32_t cc1101_get_freq(void)
{
  uint8_t data[3];
  cc1101_spi_read_register_burst(CC1101_REG_RW_FREQ2, data, 3);

  uint32_t freq = data[0] & CC1101_REG_RW_FREQ2_MASK;
  freq = freq << 8;
  freq |= data[1] & CC1101_REG_RW_FREQ1_MASK;
  freq = freq << 8;
  freq |= data[2] & CC1101_REG_RW_FREQ0_MASK;
  return freq;
}

void cc1101_set_freq(uint32_t freq)
{
  cc1101_spi_write_register(CC1101_REG_RW_FREQ0, (uint8_t)(freq) & CC1101_REG_RW_FREQ0_MASK);
  freq = freq >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_FREQ1, (uint8_t)(freq) & CC1101_REG_RW_FREQ1_MASK);
  freq = freq >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_FREQ2, (uint8_t)(freq) & CC1101_REG_RW_FREQ2_MASK);
}

uint32_t cc1101_get_modemcfg(void)
{
  uint8_t data[3];
  cc1101_spi_read_register_burst(CC1101_REG_RW_MDMCFG2, data, 3);

  uint32_t cfg = data[0] & CC1101_REG_RW_MDMCFG2_MASK;
  cfg = cfg << 8;
  cfg |= data[1] & CC1101_REG_RW_MDMCFG1_MASK;
  cfg = cfg << 8;
  cfg |= data[2] & CC1101_REG_RW_MDMCFG0_MASK;
  return cfg;
}

void cc1101_set_modemcfg(uint32_t cfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_MDMCFG0, cfg & CC1101_REG_RW_MDMCFG0_MASK);
  cfg = cfg >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_MDMCFG1, cfg & CC1101_REG_RW_MDMCFG1_MASK);
  cfg = cfg >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_MDMCFG2, cfg & CC1101_REG_RW_MDMCFG2_MASK);
}

uint16_t cc1101_get_drate_bw(void)
{
  uint8_t data[2];
  cc1101_spi_read_register_burst(CC1101_REG_RW_MDMCFG4, data, 2);

  uint16_t cfg = data[0] & CC1101_REG_RW_MDMCFG4_MASK;
  cfg = cfg << 8;
  cfg |= data[1] & CC1101_REG_RW_MDMCFG3_MASK;
  return cfg;
}

void cc1101_set_drate_bw(uint16_t cfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_MDMCFG3, cfg & CC1101_REG_RW_MDMCFG3_MASK);
  cfg = cfg >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_MDMCFG4, cfg & CC1101_REG_RW_MDMCFG4_MASK);
}

uint8_t cc1101_get_deviatn(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_DEVIATN) & CC1101_REG_RW_DEVIATN_MASK;
}

void cc1101_set_deviatn(uint8_t dev)
{
  cc1101_spi_write_register(CC1101_REG_RW_DEVIATN, dev & CC1101_REG_RW_DEVIATN_MASK);
}



uint32_t cc1101_get_mcsm(void)
{
  uint8_t data[3];
  cc1101_spi_read_register_burst(CC1101_REG_RW_MCSM2, data, 3);

  uint32_t cfg = data[0] & CC1101_REG_RW_MCSM2_MASK;
  cfg = cfg << 8;
  cfg |= cc1101_spi_read_register(CC1101_REG_RW_MCSM1) & CC1101_REG_RW_MCSM1_MASK;
  cfg = cfg << 8;
  cfg |= cc1101_spi_read_register(CC1101_REG_RW_MCSM0) & CC1101_REG_RW_MCSM0_MASK;
  return cfg;
}

void cc1101_set_mcsm(uint32_t cfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_MCSM0, cfg & CC1101_REG_RW_MCSM0_MASK);
  cfg = cfg >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_MCSM1, cfg & CC1101_REG_RW_MCSM1_MASK);
  cfg = cfg >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_MCSM2, cfg & CC1101_REG_RW_MCSM2_MASK);
}


uint8_t cc1101_get_foccfg(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_FOCCFG) & CC1101_REG_RW_FOCCFG_MASK;
}

void cc1101_set_foccfg(uint8_t cfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_FOCCFG, cfg & CC1101_REG_RW_FOCCFG_MASK);
}

uint8_t cc1101_get_bscfg(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_BSCFG) & CC1101_REG_RW_BSCFG_MASK;
}

void cc1101_set_bscfg(uint8_t cfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_BSCFG, cfg & CC1101_REG_RW_BSCFG_MASK);
}

uint32_t cc1101_get_agcctrl(void)
{
  uint8_t data[3];
  cc1101_spi_read_register_burst(CC1101_REG_RW_AGCCTRL2, data, 3);

  uint32_t ctrl = data[0] & CC1101_REG_RW_AGCCTRL2_MASK;
  ctrl = ctrl << 8;
  ctrl |= data[1] & CC1101_REG_RW_AGCCTRL1_MASK;
  ctrl = ctrl << 8;
  ctrl |= data[2] & CC1101_REG_RW_AGCCTRL0_MASK;
  return ctrl;
}

void cc1101_set_agcctrl(uint32_t ctrl)
{
  cc1101_spi_write_register(CC1101_REG_RW_AGCCTRL0, ctrl & CC1101_REG_RW_AGCCTRL0_MASK);
  ctrl = ctrl >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_AGCCTRL1, ctrl & CC1101_REG_RW_AGCCTRL1_MASK);
  ctrl = ctrl >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_AGCCTRL2, ctrl & CC1101_REG_RW_AGCCTRL2_MASK);
}

uint16_t cc1101_get_worevt(void)
{
  uint8_t data[2];
  cc1101_spi_read_register_burst(CC1101_REG_RW_WOREVT1, data, 2);

  uint16_t timeout = data[0] & CC1101_REG_RW_WOREVT1_MASK;
  timeout = timeout << 8;
  timeout |= data[1] & CC1101_REG_RW_WOREVT0_MASK;
  return timeout;
}

void cc1101_set_worevt(uint16_t timeout)
{
  cc1101_spi_write_register(CC1101_REG_RW_WOREVT0, timeout & CC1101_REG_RW_WOREVT0_MASK);
  timeout = timeout >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_WOREVT1, timeout & CC1101_REG_RW_WOREVT1_MASK);
}

uint8_t cc1101_get_worctrl(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_WORCTRL) & CC1101_REG_RW_WORCTRL_MASK;
}

void cc1101_set_worctrl(uint8_t ctrl)
{
  cc1101_spi_write_register(CC1101_REG_RW_WORCTRL, ctrl & CC1101_REG_RW_WORCTRL_MASK);
}


uint16_t cc1101_get_frend(void)
{
  uint8_t data[2];
  cc1101_spi_read_register_burst(CC1101_REG_RW_FREND1, data, 2);

  uint16_t cfg = data[0] & CC1101_REG_RW_FREND1_MASK;
  cfg = cfg << 8;
  cfg |= data[1] & CC1101_REG_RW_FREND0_MASK;
  return cfg;
}

void cc1101_set_frend(uint16_t cfg)
{
  cc1101_spi_write_register(CC1101_REG_RW_FREND0, cfg & CC1101_REG_RW_FREND0_MASK);
  cfg = cfg >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_FREND1, cfg & CC1101_REG_RW_FREND1_MASK);
}

uint32_t cc1101_get_fscal(void)
{
  uint8_t data[4];
  cc1101_spi_read_register_burst(CC1101_REG_RW_FSCAL3, data, 4);

  uint32_t cal = data[0] & CC1101_REG_RW_FSCAL3_MASK;
  cal = cal << 8;
  cal |= data[1] & CC1101_REG_RW_FSCAL2_MASK;
  cal = cal << 8;
  cal |= data[2] & CC1101_REG_RW_FSCAL1_MASK;
  cal = cal << 8;
  cal |= data[3] & CC1101_REG_RW_FSCAL0_MASK;
  return cal;
}

void cc1101_set_fscal(uint32_t cal)
{
  cc1101_spi_write_register(CC1101_REG_RW_FSCAL0, cal & CC1101_REG_RW_FSCAL0_MASK);
  cal = cal >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_FSCAL1, cal & CC1101_REG_RW_FSCAL1_MASK);
  cal = cal >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_FSCAL2, cal & CC1101_REG_RW_FSCAL2_MASK);
  cal = cal >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_FSCAL3, cal & CC1101_REG_RW_FSCAL3_MASK);
}

uint16_t cc1101_get_rcctrl(void)
{
  uint8_t data[2];
  cc1101_spi_read_register_burst(CC1101_REG_RW_RCCTRL1, data, 2);

  uint16_t ctrl = data[0] & CC1101_REG_RW_RCCTRL1_MASK;
  ctrl = ctrl << 8;
  ctrl |= data[1] & CC1101_REG_RW_RCCTRL0_MASK;
  return ctrl;
}

void cc1101_set_rcctrl(uint16_t ctrl)
{
  cc1101_spi_write_register(CC1101_REG_RW_RCCTRL0, ctrl & CC1101_REG_RW_RCCTRL0_MASK);
  ctrl = ctrl >> 8;
  cc1101_spi_write_register(CC1101_REG_RW_RCCTRL1, ctrl & CC1101_REG_RW_RCCTRL1_MASK);
}


uint8_t cc1101_get_fstest(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_FSTEST) & CC1101_REG_RW_FSTEST_MASK;
}

void cc1101_set_fstest(uint8_t test)
{
  cc1101_spi_write_register(CC1101_REG_RW_FSTEST, test & CC1101_REG_RW_FSTEST_MASK);
}

uint8_t cc1101_get_ptest(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_PTEST) & CC1101_REG_RW_PTEST_MASK;
}

void cc1101_set_ptest(uint8_t test)
{
  cc1101_spi_write_register(CC1101_REG_RW_PTEST, test & CC1101_REG_RW_PTEST_MASK);
}

uint8_t cc1101_get_agctest(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_AGCTEST) & CC1101_REG_RW_AGCTEST_MASK;
}

void cc1101_set_agctest(uint8_t test)
{
  cc1101_spi_write_register(CC1101_REG_RW_AGCTEST, test & CC1101_REG_RW_AGCTEST_MASK);
}

uint8_t cc1101_get_test0(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_TEST0) & CC1101_REG_RW_TEST0_MASK;
}

void cc1101_set_test0(uint8_t test)
{
  cc1101_spi_write_register(CC1101_REG_RW_TEST0, test & CC1101_REG_RW_TEST0_MASK);
}

uint8_t cc1101_get_test1(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_TEST1) & CC1101_REG_RW_TEST1_MASK;
}

void cc1101_set_test1(uint8_t test)
{
  cc1101_spi_write_register(CC1101_REG_RW_TEST1, test & CC1101_REG_RW_TEST1_MASK);
}

uint8_t cc1101_get_test2(void)
{
  return cc1101_spi_read_register(CC1101_REG_RW_TEST2) & CC1101_REG_RW_TEST2_MASK;
}

void cc1101_set_test2(uint8_t test)
{
  cc1101_spi_write_register(CC1101_REG_RW_TEST2, test & CC1101_REG_RW_TEST2_MASK);
}


uint8_t cc1101_get_partnum(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_PARTNUM) & CC1101_REG_RO_PARTNUM_MASK;
}

uint8_t cc1101_get_chip_version(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_VERSION) & CC1101_REG_RO_VERSION_MASK;
}

uint8_t cc1101_get_freq_offset_est(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_FREQUEST) & CC1101_REG_RO_FREQUEST_MASK;
}

uint8_t cc1101_get_lqi(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_LQI) & CC1101_REG_RO_LQI_MASK;
}

int8_t cc1101_get_rssi(void)
{
  return (int8_t)cc1101_spi_read_register(CC1101_REG_RO_RSSI) & CC1101_REG_RO_RSSI_MASK;
}

uint8_t cc1101_get_marcstate(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_MARCSTATE) & CC1101_REG_RO_MARCSTATE_MASK;
}

uint16_t cc1101_get_wortime(void)
{
  uint8_t data[2];
  cc1101_spi_read_register_burst(CC1101_REG_RO_WORTIME1, data, 2);

  uint16_t w = data[0] & CC1101_REG_RO_WORTIME1_MASK;
  w = w << 8;
  w |= data[1] & CC1101_REG_RO_WORTIME0_MASK;
  return w;
}

uint8_t cc1101_get_pkt_status(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_PKTSTATUS) & CC1101_REG_RO_PKTSTATUS_MASK;
}

uint8_t cc1101_get_vco_vc_dac(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_VCO_VC_DAC) & CC1101_REG_RO_VCO_VC_DAC_MASK;
}

uint8_t cc1101_get_tx_bytes(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_TXBYTES) & CC1101_REG_RO_TXBYTES_MASK;
}

uint8_t cc1101_get_rx_bytes(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_RXBYTES) & CC1101_REG_RO_RXBYTES_MASK;
}

uint8_t cc1101_get_rcctrl0_status(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_RCCTRL0_STATUS) & CC1101_REG_RO_RCCTRL0_STATUS_MASK;
}

uint8_t cc1101_get_rcctrl1_status(void)
{
  return cc1101_spi_read_register(CC1101_REG_RO_RCCTRL1_STATUS) & CC1101_REG_RO_RCCTRL1_STATUS_MASK;
}



static char* cc1101_config_reg_to_string(uint8_t addr)
{
  switch(addr) {
  case CC1101_REG_RW_IOCFG2: return "IOCFG2";
  case CC1101_REG_RW_IOCFG1: return "IOCFG1";
  case CC1101_REG_RW_IOCFG0: return "IOCFG0";
  case CC1101_REG_RW_FIFOTHR: return "FIFOTHR";
  case CC1101_REG_RW_SYNC1: return "SYNC1";
  case CC1101_REG_RW_SYNC0: return "SYNC0";
  case CC1101_REG_RW_PKTLEN: return "PKTLEN";
  case CC1101_REG_RW_PKTCTRL1: return "PKTCTRL1";
  case CC1101_REG_RW_PKTCTRL0: return "PKTCTRL0";
  case CC1101_REG_RW_ADDR: return "ADDR";
  case CC1101_REG_RW_CHANNR: return "CHANNR";
  case CC1101_REG_RW_FSCTRL1: return "FSCTRL1";
  case CC1101_REG_RW_FSCTRL0: return "FSCTRL0";
  case CC1101_REG_RW_FREQ2: return "FREQ2";
  case CC1101_REG_RW_FREQ1: return "FREQ1";
  case CC1101_REG_RW_FREQ0: return "FREQ0";
  case CC1101_REG_RW_MDMCFG4: return "MDMCFG4";
  case CC1101_REG_RW_MDMCFG3: return "MDMCFG3";
  case CC1101_REG_RW_MDMCFG2: return "MDMCFG2";
  case CC1101_REG_RW_MDMCFG1: return "MDMCFG1";
  case CC1101_REG_RW_MDMCFG0: return "MDMCFG0";
  case CC1101_REG_RW_DEVIATN: return "DEVIATN";
  case CC1101_REG_RW_MCSM2: return "MCSM2";
  case CC1101_REG_RW_MCSM1: return "MCSM1";
  case CC1101_REG_RW_MCSM0: return "MCSM0";
  case CC1101_REG_RW_FOCCFG: return "FOCCFG";
  case CC1101_REG_RW_BSCFG: return "BSCFG";
  case CC1101_REG_RW_AGCCTRL2: return "AGCCTRL2";
  case CC1101_REG_RW_AGCCTRL1: return "AGCCTRL1";
  case CC1101_REG_RW_AGCCTRL0: return "AGCCTRL0";
  case CC1101_REG_RW_WOREVT1: return "WOREVT1";
  case CC1101_REG_RW_WOREVT0: return "WOREVT0";
  case CC1101_REG_RW_WORCTRL: return "WORCTRL";
  case CC1101_REG_RW_FREND1: return "FREND1";
  case CC1101_REG_RW_FREND0: return "FREND0";
  case CC1101_REG_RW_FSCAL3: return "FSCAL3";
  case CC1101_REG_RW_FSCAL2: return "FSCAL2";
  case CC1101_REG_RW_FSCAL1: return "FSCAL1";
  case CC1101_REG_RW_FSCAL0: return "FSCAL0";
  case CC1101_REG_RW_RCCTRL1: return "RCCTRL1";
  case CC1101_REG_RW_RCCTRL0: return "RCCTRL0";
  case CC1101_REG_RW_FSTEST: return "FSTEST";
  case CC1101_REG_RW_PTEST: return "PTEST";
  case CC1101_REG_RW_AGCTEST: return "AGCTEST";
  case CC1101_REG_RW_TEST2: return "TEST2";
  case CC1101_REG_RW_TEST1: return "TEST1";
  case CC1101_REG_RW_TEST0: return "TEST0";
  default: return "unknown";
  }
}

static char* cc1101_status_reg_to_string(uint8_t addr)
{
  switch(addr) {
  case CC1101_REG_RO_PARTNUM: return "PARTNUM";
  case CC1101_REG_RO_VERSION: return "VERSION";
  case CC1101_REG_RO_FREQUEST: return "FREQUEST";
  case CC1101_REG_RO_LQI: return "LQI";
  case CC1101_REG_RO_RSSI: return "RSSI";
  case CC1101_REG_RO_MARCSTATE: return "MARCSTATE";
  case CC1101_REG_RO_WORTIME1: return "WORTIME1";
  case CC1101_REG_RO_WORTIME0: return "WORTIME0";
  case CC1101_REG_RO_PKTSTATUS: return "PKTSTATUS";
  case CC1101_REG_RO_VCO_VC_DAC: return "VCO_VC_DAC";
  case CC1101_REG_RO_TXBYTES: return "TXBYTES";
  case CC1101_REG_RO_RXBYTES: return "RXBYTES";
  case CC1101_REG_RO_RCCTRL1_STATUS: return "RCCTRL1_STATUS";
  case CC1101_REG_RO_RCCTRL0_STATUS: return "RCCTRL0_STATUS";
  default: return "unknown";
  }
}

void cc1101_dump_register(void)
{
  printf("CC1101: register dump\r\n\r\n");

  int i;

  printf(" config (read/write) register:\r\n");
  uint8_t data[(CC1101_REG_RW_MAX-CC1101_REG_RW_MIN) + 1];
  uint8_t l = cc1101_spi_read_register_burst(CC1101_REG_RW_MIN, data, sizeof(data));
  for(i=0; i<l; ++i) {
    printf("  0x%02X (%s): 0x%02X\r\n", i, cc1101_config_reg_to_string(i), data[i]);
  }
  printf("\r\n");

  printf(" status (read-only) register:\r\n");
  for(i=CC1101_REG_RO_MIN; i<=CC1101_REG_RO_MAX; ++i) {
    uint8_t data = cc1101_spi_read_register(i);
    printf("  0x%02X (%s): 0x%02X\r\n", i, cc1101_status_reg_to_string(i), data);
  }
  printf("\r\n");
}