very low frequency tech postings - 18 03 2005
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Fri, 18 Mar 2005
nordic nRF9E5 stuff
the nRF9E5 is
- a 433/868/915Mhz
- GFSK radio transceiver
- max. 10dBm transmit power
- max 53kpbs (manchester encoded)
- integrated 8051 derivate
- similar parts: nRF24E1, nRF24E2, without 8051: nRF905, nRF2401, nRF2402
I have created some notes on the device (hoping to keep it up to date while I work on it).
I am coding in assembler, tools: asx8051 and aslink of the SDCC (small device c compiler)
my nRF9E5 include file
The EEPROM needs a 3 byte header, so for my toolchain, I needed to hack ihx2nRF9E5.pl
an excerpt from the source:
# ihx2nRF9E5.pl (c) by maZZoo [a] maZZoo.de # licensed under GPLv2 # # mangles EEPROM data for an 8051-based nordic semicondictor # nRF9E5 radio transceiver. # # reads an Intel-hex-formatted file from stdin, # writes it to stdout, all output addresses # will be increased by $offset (>=3) # # prepends bytes as the nRF9E5 requires. # # probably does quite the same job as nordic's # eeprep.exe - I never happened to run it. # # usage: # cat aslinkout.ihx | ./ihx2nRF9E5.pl > myeeprom.hex
After hacking the quick-n-dirty perl-script, I found srecord which seems to be able to do the same job; it can handle a wide variety of program formats and operations.
For programming the boot-EEPROM 25C320 I use ponyprog.
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