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LMS-6 Radiosonde/APRS Firmware Mod (view source)
Revision as of 23:27, 27 September 2020
, 23:27, 27 September 2020initial commit
== Introduction ==
This page is a list of tasks and firmware modules that will be required to convert LMS-6 radiosondes into APRS 9600 baud 70-centimeter amateur radio trackers. See the parent page for reverse engineering information for the LMS-6 as-is.
<br />
== Modules ==
{| class="wikitable"
|+
!Owner
!Module
!Status
!Notes
!
|-
|N0RC
|Programmer(ICC)
|in-progress
|Haven't connected over ICC yet, but do have XP VM running programming software.
Communications were established with the programming tool. Suspect wiring issue.
|
|-
|N0RC
|Backup firmware
|waiting on programmer
|Once ICC is up, try to read the existing firmware to save a copy. May also analyze as a tool to figure out which pins do what, and how conversion functions are implemented.
|
|-
|N0RC
|Programming Adapter
|requirements gathering
|Figure out which pins from the edge-connector to bring out to debug connectors. We'd like to be able to plug in a standard ST7 programmer to the adapter for easy reprogramming.
|
|-
|KD0LIX
|Debug UART
|in-progress
|We can turn an unused GPIO into a software UART by bit-banging. Since we have to disable interrupts to keep the timing correct, a fast baud-rate is best, like 16MHz Fcpu -> 1mbps UART baud rate
|
|-
|
|GPS Driver
|research
|The GPS is attached to the UART port at 38400 baud. Need to figure out which of several supported protocols are in use and write or source a parser. Be aware that we will likely drop UART data while transmitting with the CC1050 radio.
|
|-
|
|APRS Packetizer
|research
|Need to create APRS frames
|
|-
|
|CC1050 Controller
|research
|Module to configure the CC1050 into an appropriate TX mode, startup, lock PLL and so forth
|
|-
|
|CC1050 Bitstream
|research
|Module to stream out APRS packet one bit at a time as the CC1050 requests them. Will likely need to disable interrupts for a significant amount of time to prevent bit-jitter
|
|-
|
|Temperature Sensor
|research
|We don't currently know how this temperature sensor works.
|
|-
|
|Humidity Sensor
|research
|Appears to be some sort of capacitance to frequency converter, need a module to measure frequency and convert to humidity. May also need to account for temperature as there appears to be a temperature probe cosited with the hygro.
|
|}
<br />
This page is a list of tasks and firmware modules that will be required to convert LMS-6 radiosondes into APRS 9600 baud 70-centimeter amateur radio trackers. See the parent page for reverse engineering information for the LMS-6 as-is.
<br />
== Modules ==
{| class="wikitable"
|+
!Owner
!Module
!Status
!Notes
!
|-
|N0RC
|Programmer(ICC)
|in-progress
|Haven't connected over ICC yet, but do have XP VM running programming software.
Communications were established with the programming tool. Suspect wiring issue.
|
|-
|N0RC
|Backup firmware
|waiting on programmer
|Once ICC is up, try to read the existing firmware to save a copy. May also analyze as a tool to figure out which pins do what, and how conversion functions are implemented.
|
|-
|N0RC
|Programming Adapter
|requirements gathering
|Figure out which pins from the edge-connector to bring out to debug connectors. We'd like to be able to plug in a standard ST7 programmer to the adapter for easy reprogramming.
|
|-
|KD0LIX
|Debug UART
|in-progress
|We can turn an unused GPIO into a software UART by bit-banging. Since we have to disable interrupts to keep the timing correct, a fast baud-rate is best, like 16MHz Fcpu -> 1mbps UART baud rate
|
|-
|
|GPS Driver
|research
|The GPS is attached to the UART port at 38400 baud. Need to figure out which of several supported protocols are in use and write or source a parser. Be aware that we will likely drop UART data while transmitting with the CC1050 radio.
|
|-
|
|APRS Packetizer
|research
|Need to create APRS frames
|
|-
|
|CC1050 Controller
|research
|Module to configure the CC1050 into an appropriate TX mode, startup, lock PLL and so forth
|
|-
|
|CC1050 Bitstream
|research
|Module to stream out APRS packet one bit at a time as the CC1050 requests them. Will likely need to disable interrupts for a significant amount of time to prevent bit-jitter
|
|-
|
|Temperature Sensor
|research
|We don't currently know how this temperature sensor works.
|
|-
|
|Humidity Sensor
|research
|Appears to be some sort of capacitance to frequency converter, need a module to measure frequency and convert to humidity. May also need to account for temperature as there appears to be a temperature probe cosited with the hygro.
|
|}
<br />