The EEPROM stores the individual configuration for the RFzero example programs. You can use the EEPROM just as you like and you may overwrite the RFzero default EEPROM addresses, but, the RFzero example programs may have to be reconfigured before they become usable again or stall completely. You can also replace the default EEPROM with a new one for your own programs. Again it is all up to you.
EEPROM map for the example programs
The RFzero example programs have one common EEPROM map even if not all of the values are used in every example program. The RFzero libraries expect to have exclusive rights to EEPROM addresses 0 to 63. Below is the RFzero default EEPROM map. But please note that it is subject to change.
| Section | Addr | Bytes | Description | Mnemonic |
|---|---|---|---|---|
| Hardware | 16 | 4 | Reference start frequency | HW_RefStartFreq |
| 16-31 | 20 | 1 | Has the ref. start frequency ever been written to the EEPROM | HW_RefStartFreqWritten |
| 21 | 1 | T1 configuration | HW_T1 |
|
| 22 | 1 | Display mode | HW_DisplayMode | |
| 23 | 1 | Attenuator mode | HW_AttenuatorMode |
|
| 24 | 1 | Warm up before RF | HW_WarmUp |
|
| 25 | 1 | SX1509 I2C address | HW_SX1509addr | |
| 26 | 1 | MCP23017 I2C address | HW_MCP23017addr | |
| GPS | 32 | 1 | Leap seconds | GPS_LeapSeconds |
| 32-63 | 33 | 1 | Wait for GPS to be valid | GPS_Wait |
| 34 | 1 | Echo the GPS data to USB | GPS_Echo | |
| 35 | 1 | Local time hours relative to UTC | GPS_LocalHoursOffset | |
| 36 | 1 | Local time minutes relative to UTC | GPS_LocalMinutesOffset | |
| 37 | 1 | Daylight saving time | GPS_LocalDST | |
| Common | 64 | 21 | Name | COMMON_Name |
| 64-127 | 85 | 16 | Call sign | COMMON_Call |
| 101 | 9 | Locator | COMMON_Locator | |
| Beacon | 128 | 8 | Nominal beacon frequency | BEACON_Frequency |
| 127-255 | 137 | 1 | Multiplier | BEACON_Multiplier |
| 138 | 1 | Keying style | BEACON_KeyingStyle | |
| 139 | 1 | CW speed, dot duration | BEACON_CWSpeed | |
| 140 | 16 | Call sign | BEACON_Call | |
| 156 | 16 | MGM message | BEACON_MGMMsg | |
| 172 | 1 | MGM extra message | BEACON_MGMMsgExtra | |
| 173 | 1 | MGM message type | BEACON_MGMMsgType | |
| 192 | 1 | IBP start minute | BEACON_IBPMinute | |
| 193 | 1 | IBP start second | BEACON_IBPSecond | |
| 194 | 1 | Power level | BEACON_WSPRPower | |
| 195 | 1 | SBP mixed mode | BEACON_SBPMode | |
| 196 | 1 | SBP transmission bit mask | BEACON_SBPMask | |
| 197 | 8 | SBP frequency | BEACON_SBPFrequency | |
| 205 | 16 | SBP call sign | BEACON_SBPCall | |
| 221 | 16 | SBP MGM message | BEACON_SBPMGMMsg | |
| WSPRTX | 256 | 1 | Transmission mode | WSPRTX_TXMode |
| 256-383 | 257 | 1 | Filter mode | WSPRTX_FilterBits |
| 258 | 1 | Automatically update the locator | WSPRTX_AutoLocator | |
| 259 | 1 | Reserved | ||
| 260 | 1 | Reserved | ||
| 261 | 1 | Sequence0, MSN night, LSN day | WSPRTX_Sequence0 | |
| 262 | 1 | Sequence1 | ||
| 263 | 1 | Sequence2 | ||
| 264 | 1 | Sequence3 | ||
| 265 | 1 | Sequence4 | ||
| 266 | 1 | Sequence5 | ||
| 267 | 1 | Sequence6 | ||
| 268 | 1 | Sequence7 | ||
| 269 | 1 | Sequence8 | ||
| 270 | 1 | Sequence9 | ||
| 271 | 1 | Sequence10 | ||
| 272 | 1 | Sequence11 | ||
| 273 | 1 | Sequence12 | ||
| 274 | 1 | Sequence13 | ||
| 275 | 1 | Sequence14 | ||
| 276 | 4 | Frequency0 | WSPRTX_Freq0 | |
| 280 | 4 | Frequency1 | ||
| 284 | 4 | Frequency2 | ||
| 288 | 4 | Frequency3 | ||
| 292 | 4 | Frequency4 | ||
| 296 | 4 | Frequency5 | ||
| 300 | 4 | Frequency6 | ||
| 304 | 4 | Frequency7 | ||
| 308 | 4 | Frequency8 | ||
| 312 | 4 | Frequency9 | ||
| 316 | 4 | Frequency10 | ||
| 320 | 4 | Frequency11 | ||
| 324 | 4 | Frequency12 | ||
| 328 | 4 | Frequency13 | ||
| 332 | 4 | Frequency14 | ||
| 336 | 1 | Filter settings0 | ||
| 337 | 1 | Filter settings1 | ||
| 338 | 1 | Filter settings2 | ||
| 339 | 1 | Filter settings3 | ||
| 340 | 1 | Filter settings4 | ||
| 341 | 1 | Filter settings5 | ||
| 342 | 1 | Filter settings6 | ||
| 343 | 1 | Filter settings7 | ||
| 344 | 1 | Filter settings8 | ||
| 345 | 1 | Filter settings9 | ||
| 346 | 1 | Filter settings10 | ||
| 347 | 1 | Filter settings11 | ||
| 348 | 1 | Filter settings12 | ||
| 349 | 1 | Filter settings13 | ||
| 350 | 1 | Filter settings14 | ||
| 351 | 1 | Power0 | WSPRTX_Power0 | |
| 352 | 1 | Power1 | ||
| 353 | 1 | Power2 | ||
| 354 | 1 | Power3 | ||
| 355 | 1 | Power4 | ||
| 356 | 1 | Power5 | ||
| 357 | 1 | Power6 | ||
| 358 | 1 | Power7 | ||
| 359 | 1 | Power8 | ||
| 360 | 1 | Power9 | ||
| 361 | 1 | Power10 | ||
| 362 | 1 | Power11 | ||
| 363 | 1 | Power12 | ||
| 364 | 1 | Power13 | ||
| 365 | 1 | Power14 | ||
| QO100 | 384 | 8 | The fixed f0 frequency | QO100_F0 |
| 384-432 | 392 | 1 | The f0 multiplication factor | QO100_F0Multi |
| 393 | 8 | The f1 receiver frequency | QO100_F1RX | |
| 401 | 1 | The f1 receiver multiplication factor | QO100_F1RXMulti | |
| 402 | 8 | The f1 transmitter frequency | QO100_F1TX | |
| 410 | 1 | The f1 transmitter multiplication factor | QO100_F1TXMulti | |
| GPSDO | 432 | 8 | The frequency | GPSDO_Freq |
| Counter | 464 | 1 | The number of averages | COUNTER_Averages |
| 464-479 | 465 | 1 | The gate time | COUNTER_GateTime |
| Multi LO | 480 | 8 | The freq 0 frequency | MULTILO_Freq0 |
| 488 | 8 | The freq 1 frequency | ||
| 496 | 8 | The freq 2 frequency | ||
| 504 | 8 | The freq 3 frequency | ||
| 512 | 8 | The freq 4 frequency | ||
| 520 | 1 | The freq 0 multiplier | MULTILO_Multi0 | |
| 521 | 1 | The freq 1 multiplier | ||
| 522 | 1 | The freq 2 multiplier | ||
| 523 | 1 | The freq 3 multiplier | ||
| 524 | 1 | The freq 4 multiplier | ||
| Signal generator | 544 |
All the address mnemonics must have the EEPROM_ prefix added, e.g. EEPROM_HW_RefStartFreq.
RFzero uses little endianness.
Qualified EEPROMs
The RFzero has been tested with the below EEPROMs in 8 pin DIP.
| Name | RFzero name | Size [kB] | I2C address | Page size [Bytes] | Pages |
|---|---|---|---|---|---|
| 24AA08 | EEPROM_TYPE_24AA08 | 1 | 0x50 | 16 | 64 |
| 24LC08B (default) | EEPROM_TYPE_24LC08B | 1 | 0x50 | 16 | 64 |
| AT24C16 | EEPROM_TYPE_AT24C16 | 2 | 0x50 | 16 | 128 |
| 24LC64 | EEPROM_TYPE_24LC64 | 8 | 0x50 | 32 | 256 |
| AT24C256 | EEPROM_TYPE_AT24C256 | 32 | 0x50 | 64 | 512 |
| 24LC1025 | EEPROM_TYPE_24LC1025 | 128 | 0x50 | 128 | 1024 |