The EEPROM stores the individual configuration for the RFzero programs. You can use the EEPROM just as you like and you may overwrite the RFzero default EEPROM addresses, but, the RFzero 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 programs
The RFzero programs have one common EEPROM map even if not all of the values are used in every 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 | |
| 27 | 1 | Rotary encoder type | HW_RotEncType | |
| 28 | 1 | PCF8574, all variants, I2C address | HW_PCF8574addr | |
| 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 | 136 | 1 | Multiplier | BEACON_Multiplier |
| 137 | 1 | Calibration interval | BEACON_CalibInterval | |
| 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 | Time slot0 (MSN sequence1, LSN sequence0) | WSPRTX_Sequence0 | |
| 262 | 1 | Time slot1 (MSN sequence1, LSN sequence0) | ||
| 263 | 1 | Time slot2 (MSN sequence1, LSN sequence0) | ||
| 264 | 1 | Time slot3 (MSN sequence1, LSN sequence0) | ||
| 265 | 1 | Time slot4 (MSN sequence1, LSN sequence0) | ||
| 266 | 1 | Time slot5 (MSN sequence1, LSN sequence0) | ||
| 267 | 1 | Time slot6 (MSN sequence1, LSN sequence0) | ||
| 268 | 1 | Time slot7 (MSN sequence1, LSN sequence0) | ||
| 269 | 1 | Time slot8 (MSN sequence1, LSN sequence0) | ||
| 270 | 1 | Time slot9 (MSN sequence1, LSN sequence0) | ||
| 271 | 1 | Time slot10 (MSN sequence1, LSN sequence0) | ||
| 272 | 1 | Time slot11 (MSN sequence1, LSN sequence0) | ||
| 273 | 1 | Time slot12 (MSN sequence1, LSN sequence0) | ||
| 274 | 1 | Time slot13 (MSN sequence1, LSN sequence0) | ||
| 275 | 1 | Time slot14 (MSN sequence1, LSN sequence0) | ||
| 276 | 4 | Frequency for index0 | WSPRTX_Freq0 | |
| 280 | 4 | Frequency for index1 | ||
| 284 | 4 | Frequency for index2 | ||
| 288 | 4 | Frequency for index3 | ||
| 292 | 4 | Frequency for index4 | ||
| 296 | 4 | Frequency for index5 | ||
| 300 | 4 | Frequency for index6 | ||
| 304 | 4 | Frequency for index7 | ||
| 308 | 4 | Frequency for index8 | ||
| 312 | 4 | Frequency for index9 | ||
| 316 | 4 | Frequency for index10 | ||
| 320 | 4 | Frequency for index11 | ||
| 324 | 4 | Frequency for index12 | ||
| 328 | 4 | Frequency for index13 | ||
| 332 | 4 | Frequency for index14 | ||
| 336 | 1 | Control bits for index0 | WSPRTX_Control0 | |
| 337 | 1 | Control bits for index1 | ||
| 338 | 1 | Control bits for index2 | ||
| 339 | 1 | Control bits for index3 | ||
| 340 | 1 | Control bits for index4 | ||
| 341 | 1 | Control bits for index5 | ||
| 342 | 1 | Control bits for index6 | ||
| 343 | 1 | Control bits for index7 | ||
| 344 | 1 | Control bits for index8 | ||
| 345 | 1 | Control bits for index9 | ||
| 346 | 1 | Control bits for index10 | ||
| 347 | 1 | Control bits for index11 | ||
| 348 | 1 | Control bits for index12 | ||
| 349 | 1 | Control bits for index13 | ||
| 350 | 1 | Control bits for index14 | ||
| 351 | 1 | Power for index0 | WSPRTX_Power0 | |
| 352 | 1 | Power for index1 | ||
| 353 | 1 | Power for index2 | ||
| 354 | 1 | Power for index3 | ||
| 355 | 1 | Power for index4 | ||
| 356 | 1 | Power for index5 | ||
| 357 | 1 | Power for index6 | ||
| 358 | 1 | Power for index7 | ||
| 359 | 1 | Power for index8 | ||
| 360 | 1 | Power for index9 | ||
| 361 | 1 | Power for index10 | ||
| 362 | 1 | Power for index11 | ||
| 363 | 1 | Power for index12 | ||
| 364 | 1 | Power for index13 | ||
| 365 | 1 | Power for index14 | ||
| 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 freq0 frequency | MULTILO_Freq0 |
| 488-543 | 488 | 8 | The freq1 frequency | |
| 496 | 8 | The freq2 frequency | ||
| 504 | 8 | The freq3 frequency | ||
| 512 | 8 | The freq4 frequency | ||
| 520 | 1 | The freq0 multiplier | MULTILO_Multi0 | |
| 521 | 1 | The freq1 multiplier | ||
| 522 | 1 | The freq2 multiplier | ||
| 523 | 1 | The freq3 multiplier | ||
| 524 | 1 | The freq4 multiplier | ||
| Signal generator | 544 | 1 | Power, 100 kHz | SIGGEN_Power0 |
| 544-699 | 545 | 1 | Power, 300 kHz | |
| 546 | 1 | Power, 1 MHz | ||
| 547 | 1 | Power, 3 MHz | ||
| 548 | 1 | Power, 10 MHz | ||
| 549 | 1 | Power, 30 MHz | ||
| 550 | 1 | Power, 100 MHz | ||
| 551 | 1 | Power, 200 MHz | ||
| 552 | 1 | Power, 280 MHz | ||
| 553 | 1 | Power, 290 MHz | ||
| 554 | 1 | Filter, 2 MHz | SIGGEN_Filter0 | |
| 555 | 1 | Filter, 4 MHz | ||
| 556 | 1 | Filter, 5 MHz | ||
| 557 | 1 | Filter, 10 MHz | ||
| 558 | 1 | Filter, 22 MHz | ||
| 559 | 1 | Filter, 49 MHz | ||
| 560 | 1 | Filter, 110 MHz | ||
| 561 | 1 | Filter, 250 MHz | ||
| 562 | 1 | Reserved | ||
| 563 | 1 | Reserved | ||
| 564 | 12 | Memory0 | SIGGEN_Memory0 | |
| 576 | 12 | Memory1 | ||
| 588 | 12 | Memory2 | ||
| 600 | 12 | Memory3 | ||
| 612 | 12 | Memory4 | ||
| 624 | 12 | Memory5 | ||
| 636 | 12 | Memory6 | ||
| 648 | 12 | Memory7 | ||
| 660 | 12 | Memory8 | ||
| 672 | 12 | Memory9 |
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 |