projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 06b70ce3 KP |
1 | ------------------------------------------------------------------------------- |
| 2 | Microchip MRF24J40 | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This directory contains a capture of the communication between a custom sensor | |
| 6 | mote board [1] and a Microchip MRF24J40MA IEEE 802.15.4 transceiver module. | |
| 7 | ||
| 8 | It is not nearly a complete sample of what types of traffic are possible, | |
| 9 | it does not have any examples of cyclic mode, it doesn't even contain RX | |
| 10 | packets, other than an ACK. | |
| 11 | ||
| 12 | [1] The board used is available here: | |
| 13 | https://github.com/karlp/karlnet/tree/master/nodes/boxcar | |
| 14 | ||
| 15 | ||
| 16 | Logic analyzer setup | |
| 17 | -------------------- | |
| 18 | ||
| 19 | The logic analyzer used was a generic Saleae Logic clone (at 16MHz). | |
| 20 | ||
| 21 | The same configuration was used for all captures. | |
| 22 | ||
| 23 | Probe Pin Description | |
| 24 | ------------------------- | |
| 25 | 0 nRESET | |
| 26 | 1 INT Signals the host MCU | |
| 27 | 2 SDI Slave data IN | |
| 28 | 3 SCK SPI clock | |
| 29 | 4 SDO Slave data OUT | |
| 30 | 5 nCS SPI chip select | |
| 31 | 6 VDD | |
| 32 | ||
| 33 | ||
| 34 | mrf24j40-reset-wakeup.sr | |
| 35 | ------------------------ | |
| 36 | ||
| 37 | Capture of power-on behaviour resetting the radio and rewriting its config | |
| 38 | as per the datasheet recommendations. | |
| 39 | ||
| 40 | The sigrok command line used was: | |
| 41 | ||
| 42 | sigrok-cli -d fx2lafw --config samplerate=16M:captureratio=2 \ | |
| 43 | --time 10ms -o mrf24j40-reset-wakeup.sr -t nCS=f \ | |
| 44 | --channels 0=nRESET,1=INT,2=SDI,3=SCK,4=SDO,5=nCS,6=VDD | |
| 45 | ||
| 46 | ||
| 47 | mrf24j40-wake-tx-ack.sr | |
| 48 | ----------------------- | |
| 49 | ||
| 50 | Captures the host MCU waking the radio, sending a packet, and checking the | |
| 51 | interrupt flags for an ACK. The sequence is not necessarily optimal, but | |
| 52 | functional. | |
| 53 | ||
| 54 | The sigrok command line used was: | |
| 55 | ||
| 56 | sigrok-cli -d fx2lafw --config samplerate=16M:captureratio=70 \ | |
| 57 | --time 20ms -o mrf24j40-wake-tx-ack.sr -t INT=r \ | |
| 58 | --channels 0=nRESET,1=INT,2=SDI,3=SCK,4=SDO,5=nCS,6=VDD | |
| 59 |