OL2385SWUG datasheet(46/64 Pages) NXP

46 / 64 page

NXP Semiconductors

OL2385SWUG

SIGFOX software driver

OL2385SWUG

All information provided in this document is subject to legal disclaimers.

User guide

Rev. 2.1 — 6 April 2018

46 / 64

7.2.3.1 Choosing ciphering key

The next command is to choose the ciphering key for the transmission. The private

ciphering key is stored in the protected area of the memory within the IC. The messages

enciphered with this key will only be received and decoded properly by a real base

station. In order to test it with the SNEK emulator tool, use the Switch to public key –

1a command next. In order to test with SFXIQ tool, make sure that the key used in the

config.txt file is same as the private key, or else they also have to use Switch to public

key as the next command. Perform this command once after the reset.

7.2.3.2 Set FCC macro channel

This command is only necessary for RCZ2 and RCZ4 devices because these regions

use the frequency hopping algorithm on macro frequency channels. A frequency map is

actually used to enable frequencies on which the device can hop for transmitting frames.

The channels in this map are enabled using config word settings. See the SIGFOX_api.h

file for detailed information.

Set the FCC Macro Channel

Example:

config_words[0] = [0x000001FF]

config_words[1] = [0x00000000]

config_words[2] = [0x00000000]

default_SIGFOX_channel = 1

Figure 32. Macro channel table

7.2.3.3 Reset FCC Macro channel

This command is only necessary for RCZ2 and RCZ4 devices, because these regions

use the frequency hopping algorithm as mentioned in Section 7.2.3.2 "Set FCC macro

channel". One has to always take care to go back to default macro channels for their

individual region, if there are no more free channels left for transmitting the frames. The

free channel information can be obtained by using the Get_FCC_macro_channel SPI

command. If the returned value is not equal to 0x30, then one might have to call the

Reset_FCC_Macro_Channel to restore the default macro channel settings. Therefore,

before sending any SIGFOX frame transmission command over SPI for RCZ2/4, the

MCU must send a Get_FCC_macro_channel to check the free macro channels first and

then call Reset_FCC_Macro_Channel, if required.

Notes:

• This command does not have to be performed for RCZ1 or RCZ3.

OL2385SWUG датащи(PDF) 46 Page - NXP Semiconductors

OL2385SWUG датащи(HTML) 46 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

датащи скачать

ссылки URL