Andy A
DW1000 UWB driver based on work of Matthias Grob & Manuel Stalder - ETH Zürich - 2015
DW1000.cpp
- Committer:
- AndyA
- Date:
- 2016-04-13
- Revision:
- 7:b13881dbb09d
- Parent:
- 6:2c77afdf7367
- Child:
- 8:0b408e77b701
File content as of revision 7:b13881dbb09d:
#include "DW1000.h"
#define SPIRATE_PLL (10*1000*1000)
#define SPIRATE_OSC (2*1000*1000)
DW1000::DW1000(UWBMode setup, PinName MOSI, PinName MISO, PinName SCLK, PinName CS, PinName IRQ) : irq(IRQ), spi(MOSI, MISO, SCLK), cs(CS)
{
setCallbacks(NULL, NULL);
deselect(); // Chip must be deselected first
spi.format(8,0); // Setup the spi for standard 8 bit data and SPI-Mode 0 (GPIO5, GPIO6 open circuit or ground on DW1000)
spi.frequency(SPIRATE_PLL); // with a 1MHz clock rate (worked up to 49MHz in our Test)
resetAll(); // we do a soft reset of the DW1000 everytime the driver starts
switch (setup) {
case user110k: // values from Matthias Grob & Manuel Stalder - ETH Zürich - library
systemConfig.setChannel(5);
systemConfig.setPRF(DW1000Setup::prf16MHz);
systemConfig.setDataRate(DW1000Setup::kbps110);
systemConfig.setSfd(DW1000Setup::standard);
systemConfig.setPreambleLength(DW1000Setup::pre1024);
systemConfig.setPreambleCode(3);
systemConfig.setSmartPower(false);
setupRadio();
setTxPower(230); // power = 23dB gain
setRxDelay(1<<14); // set delays to 2^14 (1/4 of max)
setTxDelay(1<<14);
break;
case tunedDefault: // User Manual "2.5.5 Default Configurations that should be modified" p. 22
default:
systemConfig.setChannel(5);
systemConfig.setPRF(DW1000Setup::prf16MHz);
systemConfig.setDataRate(DW1000Setup::kbps6800);
systemConfig.setSfd(DW1000Setup::standard);
systemConfig.setPreambleLength(DW1000Setup::pre128);
systemConfig.setPreambleCode(3);
systemConfig.setSmartPower(false);
setupRadio();
setTxPower(230,260,290); // power = 23dB gain
setRxDelay(0);
setTxDelay(0);
break;
case minPacketSize:
systemConfig.setChannel(5);
systemConfig.setPRF(DW1000Setup::prf64MHz);
systemConfig.setDataRate(DW1000Setup::kbps6800);
systemConfig.setSfd(DW1000Setup::standard);
systemConfig.setPreambleLength(DW1000Setup::pre64);
systemConfig.setPreambleCode(10);
systemConfig.setSmartPower(true);
setupRadio();
uint16_t txPower = 25*10; // 25dB gain.
// 2 packets per ms max. So can increase TX power of 250us packets by 10log(4/2) dB and 125us packets by 10log(8/2) dB
setTxPower(txPower,txPower,txPower+30,txPower+60); // power = 23dB gain
setRxDelay(0);
setTxDelay(0);
break;
}
irq.rise(this, &DW1000::ISR); // attach interrupt handler to rising edge of interrupt pin from DW1000
}
void DW1000::getSetup(char *buffer, int len)
{
char dataRateString[10];
if (systemConfig.getDataRate() == DW1000Setup::kbps6800)
strcpy(dataRateString,"6.8 Mbps");
else if (systemConfig.getDataRate() == DW1000Setup::kbps850)
strcpy(dataRateString,"850 kbps");
else
strcpy(dataRateString,"110 kbps");
char preambleString[8];
switch (systemConfig.getPreambleLength()) {
default:
strcpy(preambleString,"error");
break;
case DW1000Setup::pre64:
strcpy(preambleString,"64");
break;
case DW1000Setup::pre128:
strcpy(preambleString,"128");
break;
case DW1000Setup::pre256:
strcpy(preambleString,"256");
break;
case DW1000Setup::pre512:
strcpy(preambleString,"512");
break;
case DW1000Setup::pre1024:
strcpy(preambleString,"1024");
break;
case DW1000Setup::pre1536:
strcpy(preambleString,"1536");
break;
case DW1000Setup::pre2048:
strcpy(preambleString,"2048");
break;
case DW1000Setup::pre4096:
strcpy(preambleString,"4096");
break;
}
snprintf(buffer,len,"Channel:\t%u\r\nPRF:\t%s\r\nData Rate:\t%s\r\nPreamble length:\t%s\r\nPreamble code:\t%u\r\nSmart power:\t%s\r\nSFD:\t%s\r\n",
systemConfig.getChannel(),
(systemConfig.getPRF() == DW1000Setup::prf16MHz)?"16 MHz":"64 MHz",
dataRateString,
preambleString,
systemConfig.getPreambleCode(),
systemConfig.getSmartPower()?"Enabled":"Disabled",
(systemConfig.getSfd() == DW1000Setup::standard)?"Standard":"Non-standard");
}
void DW1000::setupRadio()
{
setupAGC();
setupRxConfig();
setupLDE();
setupChannel();
setupAnalogRF();
setupFreqSynth();
setupTxCalibration();
setupTxFrameCtrl();
setupSystemConfig();
}
void DW1000::setupAGC()
{
writeRegister16(DW1000_AGC_CTRL, DWAGCCTRL_AGC_CTRL1, 0x0001);
if (systemConfig.getPRF() == DW1000Setup::prf16MHz)
writeRegister16(DW1000_AGC_CTRL, DWAGCCTRL_AGC_TUNE1, 0x8870);
else
writeRegister16(DW1000_AGC_CTRL, DWAGCCTRL_AGC_TUNE1, 0x889B);
writeRegister32(DW1000_AGC_CTRL, DWAGCCTRL_AGC_TUNE2, 0x2502A907);
writeRegister16(DW1000_AGC_CTRL, DWAGCCTRL_AGC_TUNE3, 0x0035);
}
void DW1000::setupSystemConfig()
{
uint32_t valueToUse = 0;
valueToUse |= 1<<9; // IRQ output is active high (default)
valueToUse |= 1<<12; // Disable double buffered Rx (default)
// valueToUse |= 3<<16; // enable long (>125bytes data) packets
if (!systemConfig.getSmartPower())
valueToUse |= 1<<18; // disable smart power
if (systemConfig.getDataRate() == DW1000Setup::kbps110)
valueToUse |= 1<<22;
valueToUse |= 1<<29;// enable auto reenabling receiver after error
writeRegister32(DW1000_SYS_CFG, 0, valueToUse);
}
void DW1000::setupRxConfig()
{
switch (systemConfig.getDataRate()) {
case DW1000Setup::kbps110:
if (systemConfig.getSfd() == DW1000Setup::standard)
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE0B, 0x000A);
else
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE0B, 0x0016);
break;
case DW1000Setup::kbps850:
if (systemConfig.getSfd() == DW1000Setup::standard)
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE0B, 0x0001);
else
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE0B, 0x0006);
break;
case DW1000Setup::kbps6800:
default:
if (systemConfig.getSfd() == DW1000Setup::standard)
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE0B, 0x0001);
else
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE0B, 0x0002);
break;
}
if (systemConfig.getPRF() == DW1000Setup::prf16MHz)
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE1A, 0x0087); //DRX_TUNE1a for 16MHz PRF
else
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE1A, 0x008D);
switch (systemConfig.getPreambleLength()) {
case DW1000Setup::pre1536:
case DW1000Setup::pre2048:
case DW1000Setup::pre4096:
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE1B, 0x0064); //DRX_TUNE1b for 110kbps & > 1024 symbols
break;
default: // 128 to 1024
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE1B, 0x0020); //DRX_TUNE1b for 128- 1024 symbols
break;
case DW1000Setup::pre64:
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE1B, 0x0010); //DRX_TUNE1b for 64 symbols
break;
}
switch (systemConfig.getPreambleLength()) {
case DW1000Setup::pre64:
case DW1000Setup::pre128: // PAC = 8
if (systemConfig.getPRF() == DW1000Setup::prf16MHz)
writeRegister32(DW1000_DRX_CONF, DWDRX_DRX_TUNE2, 0x311A002D); //DRX_TUNE2 PAC 8 for 64MHz PRF
else
writeRegister32(DW1000_DRX_CONF, DWDRX_DRX_TUNE2, 0x313B006B); //DRX_TUNE2 PAC 8 for 64MHz PRF
break;
case DW1000Setup::pre256:
case DW1000Setup::pre512: // PAC = 16
if (systemConfig.getPRF() == DW1000Setup::prf16MHz)
writeRegister32(DW1000_DRX_CONF, DWDRX_DRX_TUNE2, 0x331A0052); //DRX_TUNE2 PAC 16 for 64MHz PRF
else
writeRegister32(DW1000_DRX_CONF, DWDRX_DRX_TUNE2, 0x333B00BE); //DRX_TUNE2 PAC 16 for 64MHz PRF
break;
case DW1000Setup::pre1024: // PAC = 32
if (systemConfig.getPRF() == DW1000Setup::prf16MHz)
writeRegister32(DW1000_DRX_CONF, DWDRX_DRX_TUNE2, 0x351A009A); //DRX_TUNE2 PAC 32 for 64MHz PRF
else
writeRegister32(DW1000_DRX_CONF, DWDRX_DRX_TUNE2, 0x353B015E); //DRX_TUNE2 PAC 32 for 64MHz PRF
break;
case DW1000Setup::pre1536:
case DW1000Setup::pre2048:
case DW1000Setup::pre4096: // PAC = 64
if (systemConfig.getPRF() == DW1000Setup::prf16MHz)
writeRegister32(DW1000_DRX_CONF, DWDRX_DRX_TUNE2, 0x371A011D); //DRX_TUNE2 PAC 64 for 64MHz PRF
else
writeRegister32(DW1000_DRX_CONF, DWDRX_DRX_TUNE2, 0x373B0296); //DRX_TUNE2 PAC 64 for 64MHz PRF
break;
}
if (systemConfig.getPreambleLength() == DW1000Setup::pre64)
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE4H, 0x0010);
else
writeRegister16(DW1000_DRX_CONF, DWDRX_DRX_TUNE4H, 0x0028);
}
void DW1000::setupLDE()
{
writeRegister8 (DW1000_LDE_CTRL, DWLDE_LDE_CFG1, 0x13 | 0x03<<5); //NTM = 13 (12 may be better in some situations. PMULT = 3
if (systemConfig.getPRF() == DW1000Setup::prf16MHz)
writeRegister16(DW1000_LDE_CTRL, DWLDE_LDE_CFG2, 0x1607); //LDE_CFG2 for 16MHz PRF
else
writeRegister16(DW1000_LDE_CTRL, DWLDE_LDE_CFG2, 0x0607); //LDE_CFG2 for 64MHz PRF
uint16_t replicaCoeff;
switch (systemConfig.getPreambleCode()) {
default:
case 1:
case 2:
replicaCoeff = 0x5998;
break;
case 3:
replicaCoeff = 0x51EA;
break;
case 4:
replicaCoeff = 0x428E;
break;
case 5:
replicaCoeff = 0x451E;
break;
case 6:
replicaCoeff = 0x2E14;
break;
case 7:
replicaCoeff = 0x8000;
break;
case 8:
replicaCoeff = 0x51EA;
break;
case 9:
replicaCoeff = 0x28F4;
break;
case 10:
replicaCoeff = 0x3332;
break;
case 11:
replicaCoeff = 0x3AE0;
break;
case 12:
replicaCoeff = 0x3D70;
break;
case 13:
replicaCoeff = 0x3AE0;
break;
case 14:
replicaCoeff = 0x35C2;
break;
case 15:
replicaCoeff = 0x2B84;
break;
case 16:
replicaCoeff = 0x35C2;
break;
case 17:
replicaCoeff = 0x3332;
break;
case 18:
replicaCoeff = 0x35C2;
break;
case 19:
replicaCoeff = 0x35C2;
break;
case 20:
replicaCoeff = 0x47AE;
break;
case 21:
replicaCoeff = 0x3AE0;
break;
case 22:
replicaCoeff = 0x3850;
break;
case 23:
replicaCoeff = 0x30A2;
break;
case 24:
replicaCoeff = 0x3850;
break;
}
if (systemConfig.getDataRate() == DW1000Setup::kbps110)
replicaCoeff = replicaCoeff>>3;
writeRegister16(DW1000_LDE_CTRL, DWLDE_LDE_REPC, replicaCoeff);
loadLDE();
}
void DW1000::setupChannel()
{
uint32_t registerValue = 0;
registerValue = systemConfig.getChannel(); // set Tx channel
registerValue |= systemConfig.getChannel()<<4; // set Rx channel
if (systemConfig.getPRF() == DW1000Setup::prf16MHz) // set PRF (2 bit value 01 or 10)
registerValue |= 0x01 << 18;
else
registerValue |= 0x02 << 18;
if (systemConfig.getSfd() == DW1000Setup::decaWave)
registerValue |= 0x01 << 17; // enable DW own SFD
if (systemConfig.getSfd() == DW1000Setup::user) {
registerValue |= 0x01 << 20; // enable user set SFD Tx
registerValue |= 0x01 << 21; // enable user set SFD Rx
}
registerValue |= systemConfig.getPreambleCode() << 22; // set Tx preamble code
registerValue |= systemConfig.getPreambleCode() << 27; // set Rx preamble code
writeRegister32(DW1000_CHAN_CTRL, 0, registerValue);
}
uint8_t DW1000::powerToRegValue(uint16_t powercB)
{
// course power control - 0 = 18dB, 6 = 0dB in 3dB steps.
uint8_t course = powercB / 30;
if(course > 6)
course = 6;
// remaining power
powercB -= course * 30;
// value in reg is inverse.
course = 6-course;
// fine control in steps of 0.5dB
uint8_t fine = powercB / 5;
if (fine > 31)
fine = 31;
return (course << 5) | fine;
}
// transmit power: 0 to 33.5 dB gain in steps of 0.5. Inputs are in 10ths of a dB (0 to 335)
void DW1000::setTxPower(uint16_t normalPowercB, uint16_t boost500, uint16_t boost250, uint16_t boost125)
{
if(normalPowercB > 335)
normalPowercB = 335;
if (boost500 < normalPowercB)
boost500 = normalPowercB;
if(boost500 > 335)
boost500 = 335;
if (boost250 < boost500)
boost250 = boost500;
if(boost250 > 335)
boost250 = 335;
if (boost125 < boost250)
boost125 = boost250;
if(boost125 > 335)
boost125 = 335;
if (systemConfig.getSmartPower() == false) {
boost500 = normalPowercB;
boost250 = normalPowercB;
boost125 = normalPowercB;
}
uint32_t powerReg = powerToRegValue(normalPowercB);
powerReg |= powerToRegValue(boost500) << 8;
powerReg |= powerToRegValue(boost250) << 16;
powerReg |= powerToRegValue(boost125) << 24;
}
void DW1000::setupAnalogRF()
{
switch (systemConfig.getChannel()) {
case 1:
writeRegister32(DW1000_RF_CONF, DWRFCONF_RF_TXCTRL, 0x00005C40);
break;
case 2:
writeRegister32(DW1000_RF_CONF, DWRFCONF_RF_TXCTRL, 0x00045CA0);
break;
case 3:
writeRegister32(DW1000_RF_CONF, DWRFCONF_RF_TXCTRL, 0x00086CC0);
break;
case 4:
writeRegister32(DW1000_RF_CONF, DWRFCONF_RF_TXCTRL, 0x00045C80);
break;
case 5:
default:
writeRegister32(DW1000_RF_CONF, DWRFCONF_RF_TXCTRL, 0x001E3FE0);
break;
case 7:
writeRegister32(DW1000_RF_CONF, DWRFCONF_RF_TXCTRL, 0x001E7DE0);
break;
}
switch (systemConfig.getChannel()) {
case 1:
case 2:
case 3:
case 5:
default:
writeRegister8(DW1000_RF_CONF, DWRFCONF_RF_RXCTRLH, 0xD8);
break;
case 4:
case 7:
writeRegister8(DW1000_RF_CONF, DWRFCONF_RF_RXCTRLH, 0xBC);
break;
}
loadLDOTUNE();
}
void DW1000::setupTxCalibration()
{
switch (systemConfig.getChannel()) {
case 1:
writeRegister8 (DW1000_TX_CAL, DWTXCAL_TC_PGDELAY, 0xC9);
break;
case 2:
writeRegister8 (DW1000_TX_CAL, DWTXCAL_TC_PGDELAY, 0xC2);
break;
case 3:
writeRegister8 (DW1000_TX_CAL, DWTXCAL_TC_PGDELAY, 0xC5);
break;
case 4:
writeRegister8 (DW1000_TX_CAL, DWTXCAL_TC_PGDELAY, 0x95);
break;
case 5:
default:
writeRegister8 (DW1000_TX_CAL, DWTXCAL_TC_PGDELAY, 0xC0);
break;
case 7:
writeRegister8 (DW1000_TX_CAL, DWTXCAL_TC_PGDELAY, 0x93);
break;
}
}
void DW1000::setupFreqSynth()
{
switch (systemConfig.getChannel()) {
case 1:
writeRegister32 (DW1000_FS_CTRL, DWFSCTRL_FS_PLLCFG, 0x09000407); //FS_PLLCFG for channel 1
writeRegister8 (DW1000_FS_CTRL, DWFSCTRL_FS_PLLTUNE, 0x1E);
break;
case 2:
case 4:
writeRegister32 (DW1000_FS_CTRL, DWFSCTRL_FS_PLLCFG, 0x08400508); //FS_PLLCFG for channel 2,4
writeRegister8 (DW1000_FS_CTRL, DWFSCTRL_FS_PLLTUNE, 0x26);
break;
case 3:
writeRegister32 (DW1000_FS_CTRL, DWFSCTRL_FS_PLLCFG, 0x08401009); //FS_PLLCFG for channel 3
writeRegister8 (DW1000_FS_CTRL, DWFSCTRL_FS_PLLTUNE, 0x5E);
break;
case 5:
case 7:
default:
writeRegister32 (DW1000_FS_CTRL, DWFSCTRL_FS_PLLCFG, 0x0800041D); //FS_PLLCFG for channel 5,7
writeRegister8 (DW1000_FS_CTRL, DWFSCTRL_FS_PLLTUNE, 0xBE); //FS_PLLTUNE for channel 5
break;
}
}
void DW1000::setupTxFrameCtrl()
{
uint32_t frameCtrlValue = 0;
switch (systemConfig.getDataRate()) {
case DW1000Setup::kbps110:
break;
case DW1000Setup::kbps850:
frameCtrlValue |= 0x01<<13;
break;
case DW1000Setup::kbps6800:
default:
frameCtrlValue |= 0x02<<13;
break;
}
frameCtrlValue |= 0x01<<15;
if (systemConfig.getPRF() == DW1000Setup::prf16MHz)
frameCtrlValue |= 0x01<<16;
else
frameCtrlValue |= 0x02<<16;
switch (systemConfig.getPreambleLength()) {
case DW1000Setup::pre64:
frameCtrlValue |= 0x01<<18; // TXPSR
frameCtrlValue |= 0x00<<20; // PE
break;
case DW1000Setup::pre128:
default:
frameCtrlValue |= 0x01<<18; // TXPSR
frameCtrlValue |= 0x01<<20; // PE
break;
case DW1000Setup::pre256:
frameCtrlValue |= 0x01<<18; // TXPSR
frameCtrlValue |= 0x02<<20; // PE
break;
case DW1000Setup::pre512:
frameCtrlValue |= 0x01<<18; // TXPSR
frameCtrlValue |= 0x03<<20; // PE
break;
case DW1000Setup::pre1024:
frameCtrlValue |= 0x02<<18; // TXPSR
frameCtrlValue |= 0x00<<20; // PE
break;
case DW1000Setup::pre1536:
frameCtrlValue |= 0x02<<18; // TXPSR
frameCtrlValue |= 0x01<<20; // PE
break;
case DW1000Setup::pre2048:
frameCtrlValue |= 0x02<<18; // TXPSR
frameCtrlValue |= 0x02<<20; // PE
break;
case DW1000Setup::pre4096:
frameCtrlValue |= 0x03<<18; // TXPSR
frameCtrlValue |= 0x00<<20; // PE
break;
}
writeRegister32(DW1000_TX_FCTRL,0,frameCtrlValue);
}
void DW1000::setRxDelay(uint16_t ticks)
{
writeRegister16(DW1000_LDE_CTRL, DWLDE_LDE_RXANTD, ticks);
}
void DW1000::setTxDelay(uint16_t ticks)
{
writeRegister16(DW1000_TX_ANTD, 0, ticks);
}
void DW1000::setCallbacks(void (*callbackRX)(void), void (*callbackTX)(void))
{
bool RX = false;
bool TX = false;
if (callbackRX) {
DW1000::callbackRX.attach(callbackRX);
RX = true;
}
if (callbackTX) {
DW1000::callbackTX.attach(callbackTX);
TX = true;
}
setInterrupt(RX,TX);
}
uint32_t DW1000::getDeviceID()
{
uint32_t result;
readRegister(DW1000_DEV_ID, 0, (uint8_t*)&result, 4);
return result;
}
uint64_t DW1000::getEUI()
{
uint64_t result;
readRegister(DW1000_EUI, 0, (uint8_t*)&result, 8);
return result;
}
void DW1000::setEUI(uint64_t EUI)
{
writeRegister(DW1000_EUI, 0, (uint8_t*)&EUI, 8);
}
float DW1000::getVoltage()
{
uint8_t data;
writeRegister8(DW1000_RF_CONF, 0x11, 0x80);
writeRegister8(DW1000_RF_CONF, 0x12, 0x0A);
writeRegister8(DW1000_RF_CONF, 0x12, 0x0F);
writeRegister8(DW1000_TX_CAL, 0x00, 0x01);
writeRegister8(DW1000_TX_CAL, 0x00, 0x00);
data = readRegister8(DW1000_TX_CAL, 0x03); // get the 8-Bit reading for Voltage
float Voltage = (float)(data - (readOTP(0x08)&0x00ff)) *0.00578 + 3.3;
return Voltage;
}
float DW1000::getTemperature()
{
uint8_t data;
writeRegister8(DW1000_RF_CONF, 0x11, 0x80);
writeRegister8(DW1000_RF_CONF, 0x12, 0x0A);
writeRegister8(DW1000_RF_CONF, 0x12, 0x0F);
writeRegister8(DW1000_TX_CAL, 0x00, 0x01);
writeRegister8(DW1000_TX_CAL, 0x00, 0x00);
data = readRegister16(DW1000_TX_CAL, 0x04); // get the 8-Bit reading for Temperature
float temperature = (float)(data - (readOTP(0x09) & 0x00ff))*0.9 + 23;
return temperature;
}
uint64_t DW1000::getStatus()
{
return readRegister40(DW1000_SYS_STATUS, 0);
}
uint64_t DW1000::getRXTimestamp()
{
return readRegister40(DW1000_RX_TIME, 0);
}
uint64_t DW1000::getTXTimestamp()
{
return readRegister40(DW1000_TX_TIME, 0);
}
void DW1000::sendFrame(uint8_t* message, uint16_t length)
{
//if (length >= 1021) length = 1021; // check for maximim length a frame can have with 1024 Byte frames [not used, see constructor]
if (length >= 125) length = 125; // check for maximim length a frame can have with 127 Byte frames
uint8_t len_7bit = length;
writeRegister(DW1000_TX_BUFFER, 0, message, len_7bit); // fill buffer
/* support for frames over 127 bytes
uint8_t backup = readRegister8(DW1000_TX_FCTRL, 1); // put length of frame
length += 2; // including 2 CRC Bytes
length = ((backup & 0xFC) << 8) | (length & 0x03FF);
writeRegister16(DW1000_TX_FCTRL, 0, length);
*/
len_7bit += 2; // including 2 CRC Bytes
writeRegister8(DW1000_TX_FCTRL, 0, len_7bit);
stopTRX(); // stop receiving
writeRegister8(DW1000_SYS_CTRL, 0, 0x02 | 0x80); // trigger sending process by setting the TXSTRT bit
// startRX(); // enable receiver again
}
void DW1000::setupSyncedFrame(uint8_t* message, uint16_t length)
{
//if (length >= 1021) length = 1021; // check for maximim length a frame can have with 1024 Byte frames [not used, see constructor]
if (length >= 125) length = 125; // check for maximim length a frame can have with 127 Byte frames
writeRegister(DW1000_TX_BUFFER, 0, message, length); // fill buffer
uint8_t backup = readRegister8(DW1000_TX_FCTRL, 1); // put length of frame
length += 2; // including 2 CRC Bytes
length = ((backup & 0xFC) << 8) | (length & 0x03FF);
writeRegister16(DW1000_TX_FCTRL, 0, length);
}
void DW1000::armSyncedFrame()
{
stopTRX(); // stop receiving
writeRegister16(DW1000_EXT_SYNC, DWEXTSYNC_EC_CTRL, 33<<3 | 0x01); // Sync register = TX start with a wait of 33 (recomended, value must fulfill wait % 4 = 1)
}
void DW1000::sendDelayedFrame(uint8_t* message, uint16_t length, uint64_t TxTimestamp)
{
//if (length >= 1021) length = 1021; // check for maximim length a frame can have with 1024 Byte frames [not used, see constructor]
if (length >= 125) length = 125; // check for maximim length a frame can have with 127 Byte frames
writeRegister(DW1000_TX_BUFFER, 0, message, length); // fill buffer
uint8_t backup = readRegister8(DW1000_TX_FCTRL, 1); // put length of frame
length += 2; // including 2 CRC Bytes
length = ((backup & 0xFC) << 8) | (length & 0x03FF);
writeRegister16(DW1000_TX_FCTRL, 0, length);
writeRegister40(DW1000_DX_TIME, 0, TxTimestamp); //write the timestamp on which to send the message
stopTRX(); // stop receiving
writeRegister8(DW1000_SYS_CTRL, 0, 0x02 | 0x04 | 0x80); // trigger sending process by setting the TXSTRT and TXDLYS bit. Set Wait4resp to automatically enter RX mode after tx.
}
void DW1000::startRX()
{
writeRegister8(DW1000_SYS_CTRL, 0x01, 0x01); // start listening for preamble by setting the RXENAB bit
}
void DW1000::stopTRX()
{
writeRegister8(DW1000_SYS_CTRL, 0, 0x40); // disable tranceiver go back to idle mode
}
// PRIVATE Methods ------------------------------------------------------------------------------------
void DW1000::loadLDE() // initialise LDE algorithm LDELOAD User Manual p22
{
spi.frequency(SPIRATE_OSC); // with a 1MHz clock rate (worked up to 49MHz in our Test)
writeRegister16(DW1000_PMSC, 0, 0x0301); // set clock to XTAL so OTP is reliable
writeRegister16(DW1000_OTP_IF, DWOTP_OTP_CTRL, 0x8000); // set LDELOAD bit in OTP
wait_us(150);
writeRegister16(DW1000_PMSC, 0, 0x0200); // recover to PLL clock
wait_ms(1);
spi.frequency(SPIRATE_PLL); // with a 1MHz clock rate (worked up to 49MHz in our Test)
}
void DW1000::loadLDOTUNE()
{
uint64_t LDOTuningValue = readOTP(0x0004);
if (LDOTuningValue != 0) {
LDOTuningValue = LDOTuningValue | ((uint64_t)(readOTP(0x0005) & 0x00ff) << 32);
writeRegister40(DW1000_RF_CONF,DWRFCONF_RF_LDOTUNE,LDOTuningValue);
}
}
void DW1000::resetRX()
{
writeRegister8(DW1000_PMSC, 3, 0xE0); // set RX reset
writeRegister8(DW1000_PMSC, 3, 0xF0); // clear RX reset
}
void DW1000::resetAll()
{
spi.frequency(SPIRATE_OSC); // with a 1MHz clock rate (worked up to 49MHz in our Test)
writeRegister8(DW1000_PMSC, 0, 0x01); // set clock to XTAL
writeRegister8(DW1000_PMSC, 3, 0x00); // set All reset
wait_us(10); // wait for PLL to lock
writeRegister8(DW1000_PMSC, 3, 0xF0); // clear All reset
wait_ms(1);
spi.frequency(SPIRATE_PLL); // with a 1MHz clock rate (worked up to 49MHz in our Test)
}
/// After writes have been completed reset the device.
bool DW1000::writeOTP(uint16_t word_address,uint32_t data)
{
spi.frequency(SPIRATE_OSC); // with a 1MHz clock rate (worked up to 49MHz in our Test)
writeRegister8(DW1000_PMSC, 0, 0x01); // set clock to XTAL
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL+1,0x03); //
writeRegister16(DW1000_OTP_IF,DWOTP_OTP_WDAT,0x9220); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x08); //
wait_ms(1);
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL+1,0x02); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x88); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x80); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x00); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL+1,0x05); //
writeRegister16(DW1000_OTP_IF,DWOTP_OTP_WDAT,0x000E); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x08); //
wait_ms(1);
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL+1,0x04); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x88); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x80); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x00); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL+1,0x01); //
writeRegister16(DW1000_OTP_IF,DWOTP_OTP_WDAT,0x1024); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x08); //
wait_ms(1);
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL+1,0x00); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x00); //
writeRegister32(DW1000_OTP_IF,DWOTP_OTP_WDAT,data); //
writeRegister16(DW1000_OTP_IF,DWOTP_OTP_ADDR,word_address); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x40); //
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x00); //
wait_ms(1);
for (int i=0; i<10; i++) {
if (readOTP(word_address) == data)
return true;
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x40); // retry
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x00);
wait_ms(1);
}
return false;
}
uint32_t DW1000::readOTP(uint16_t word_address)
{
writeRegister16(DW1000_OTP_IF,DWOTP_OTP_ADDR,word_address); // write address
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x03); // read address load
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x01); // read
uint32_t data = readRegister32(DW1000_OTP_IF,DWOTP_OTP_RDAT);
writeRegister8(DW1000_OTP_IF,DWOTP_OTP_CTRL,0x00); // OTP idle
return data;
}
void DW1000::setInterrupt(bool RX, bool TX)
{
writeRegister16(DW1000_SYS_MASK, 0, RX*0x4000 | TX*0x0080); // RX good frame 0x4000, TX done 0x0080
}
void DW1000::ISR()
{
uint64_t status = getStatus();
if (status & 0x4000) { // a frame was received
callbackRX.call();
writeRegister16(DW1000_SYS_STATUS, 0, 0x6F00); // clearing of receiving status bits
}
if (status & 0x80) { // sending complete
callbackTX.call();
writeRegister8(DW1000_SYS_STATUS, 0, 0xF8); // clearing of sending status bits
}
}
uint16_t DW1000::getFramelength()
{
uint16_t framelength = readRegister16(DW1000_RX_FINFO, 0); // get framelength
framelength = (framelength & 0x03FF) - 2; // take only the right bits and subtract the 2 CRC Bytes
return framelength;
}
// SPI Interface ------------------------------------------------------------------------------------
uint8_t DW1000::readRegister8(uint8_t reg, uint16_t subaddress)
{
uint8_t result;
readRegister(reg, subaddress, &result, 1);
return result;
}
uint16_t DW1000::readRegister16(uint8_t reg, uint16_t subaddress)
{
uint16_t result;
readRegister(reg, subaddress, (uint8_t*)&result, 2);
return result;
}
uint32_t DW1000::readRegister32(uint8_t reg, uint16_t subaddress)
{
uint32_t result;
readRegister(reg, subaddress, (uint8_t*)&result, 4);
return result;
}
uint64_t DW1000::readRegister40(uint8_t reg, uint16_t subaddress)
{
uint64_t result = 0;
readRegister(reg, subaddress, (uint8_t*)&result, 5);
return result;
}
uint64_t DW1000::readRegister64(uint8_t reg, uint16_t subaddress)
{
uint64_t result;
readRegister(reg, subaddress, (uint8_t*)&result, 8);
return result;
}
void DW1000::writeRegister8(uint8_t reg, uint16_t subaddress, uint8_t buffer)
{
writeRegister(reg, subaddress, &buffer, 1);
}
void DW1000::writeRegister16(uint8_t reg, uint16_t subaddress, uint16_t buffer)
{
writeRegister(reg, subaddress, (uint8_t*)&buffer, 2);
}
void DW1000::writeRegister32(uint8_t reg, uint16_t subaddress, uint32_t buffer)
{
writeRegister(reg, subaddress, (uint8_t*)&buffer, 4);
}
void DW1000::writeRegister40(uint8_t reg, uint16_t subaddress, uint64_t buffer)
{
writeRegister(reg, subaddress, (uint8_t*)&buffer, 5);
}
void DW1000::readRegister(uint8_t reg, uint16_t subaddress, uint8_t *buffer, int length)
{
setupTransaction(reg, subaddress, false);
for(int i=0; i<length; i++) // get data
buffer[i] = spi.write(0x00);
deselect();
}
void DW1000::writeRegister(uint8_t reg, uint16_t subaddress, uint8_t *buffer, int length)
{
setupTransaction(reg, subaddress, true);
for(int i=0; i<length; i++) // put data
spi.write(buffer[i]);
deselect();
}
void DW1000::setupTransaction(uint8_t reg, uint16_t subaddress, bool write)
{
reg |= (write * DW1000_WRITE_FLAG); // set read/write flag
select();
if (subaddress > 0) { // there's a subadress, we need to set flag and send second header byte
spi.write(reg | DW1000_SUBADDRESS_FLAG);
if (subaddress > 0x7F) { // sub address too long, we need to set flag and send third header byte
spi.write((uint8_t)(subaddress & 0x7F) | DW1000_2_SUBADDRESS_FLAG); // and
spi.write((uint8_t)(subaddress >> 7));
} else {
spi.write((uint8_t)subaddress);
}
} else {
spi.write(reg); // say which register address we want to access
}
}
void DW1000::select() // always called to start an SPI transmission
{
irq.disable_irq(); // disable interrupts from DW1000 during SPI becaus this leads to crashes! TODO: if you have other interrupt handlers attached on the micro controller, they could also interfere.
cs = 0; // set Cable Select pin low to start transmission
}
void DW1000::deselect() // always called to end an SPI transmission
{
cs = 1; // set Cable Select pin high to stop transmission
irq.enable_irq(); // reenable the interrupt handler
}