// Returns true iff RFM22 (or RFM23) appears to be correctly connected.
bool RFM22CheckConnected()
{
const bool neededEnable = powerUpSPIIfDisabled();
bool isOK = false;
const uint8_t rType = _RFM22ReadReg8Bit(0); // May read as 0 if not connected at all.
if(RFM22_SUPPORTED_DEVICE_TYPE == rType)
{
const uint8_t rVersion = _RFM22ReadReg8Bit(1);
if(RFM22_SUPPORTED_DEVICE_VERSION == rVersion)
{ isOK = true; }
#if 1 && defined(DEBUG)
else
{
DEBUG_SERIAL_PRINT_FLASHSTRING("RFM22 bad version: ");
DEBUG_SERIAL_PRINTFMT(rVersion, HEX);
DEBUG_SERIAL_PRINTLN();
}
#endif
}
#if 1 && defined(DEBUG)
else
{
DEBUG_SERIAL_PRINT_FLASHSTRING("RFM22 bad type: ");
DEBUG_SERIAL_PRINTFMT(rType, HEX);
DEBUG_SERIAL_PRINTLN();
}
#endif
if(neededEnable) { powerDownSPI(); }
return(isOK);
}
// Configure the radio from a list of register/value pairs in readonly PROGMEM/Flash, terminating with an 0xff register value.
// NOTE: argument is not a pointer into SRAM, it is into PROGMEM!
// Could optimise case where multiple values are for successive RFM22 registers by using burst write.
void RFM22RegisterBlockSetup(const uint8_t registerValues[][2])
{
const bool neededEnable = powerUpSPIIfDisabled();
for( ; ; )
{
const uint8_t reg = pgm_read_byte(&(registerValues[0][0]));
const uint8_t val = pgm_read_byte(&(registerValues[0][1]));
if(0xff == reg) { break; }
#if 0 && defined(DEBUG)
DEBUG_SERIAL_PRINT_FLASHSTRING("RFM22 reg 0x");
DEBUG_SERIAL_PRINTFMT(reg, HEX);
DEBUG_SERIAL_PRINT_FLASHSTRING(" = 0x");
DEBUG_SERIAL_PRINTFMT(val, HEX);
DEBUG_SERIAL_PRINTLN();
#endif
_RFM22WriteReg8Bit(reg, val);
++registerValues;
}
if(neededEnable) { powerDownSPI(); }
}
// Initialise the device (if any) before first use.
// Returns true iff successful.
// Uses specified order DS18B20 found on bus.
// May need to be reinitialised if precision changed.
bool TemperatureC16_DS18B20::init()
{
// DEBUG_SERIAL_PRINTLN_FLASHSTRING("DS18B20 init...");
bool found = false;
// Ensure no bad search state.
minOW.reset_search();
for( ; ; )
{
if(!minOW.search(address))
{
minOW.reset_search(); // Be kind to any other OW search user.
break;
}
#if 0 && defined(DEBUG)
// Found a device.
DEBUG_SERIAL_PRINT_FLASHSTRING("addr:");
for(int i = 0; i < 8; ++i)
{
DEBUG_SERIAL_PRINT(' ');
DEBUG_SERIAL_PRINTFMT(address[i], HEX);
}
DEBUG_SERIAL_PRINTLN();
#endif
if(0x28 != address[0])
{
#if 0 && defined(DEBUG)
DEBUG_SERIAL_PRINTLN_FLASHSTRING("Not a DS18B20, skipping...");
#endif
continue;
}
#if 0 && defined(DEBUG)
DEBUG_SERIAL_PRINTLN_FLASHSTRING("Setting precision...");
#endif
minOW.reset();
// Write scratchpad/config
minOW.select(address);
minOW.write(0x4e);
minOW.write(0); // Th: not used.
minOW.write(0); // Tl: not used.
// MinOW.write(DS1820_PRECISION | 0x1f); // Config register; lsbs all 1.
minOW.write(((precision - 9) << 6) | 0x1f); // Config register; lsbs all 1.
// Found one and configured it!
found = true;
}
// Search has been run (whether DS18B20 was found or not).
initialised = true;
if(!found)
{
// DEBUG_SERIAL_PRINTLN_FLASHSTRING("DS18B20 not found");
address[0] = 0; // Indicate that no DS18B20 was found.
}
return(found);
}
