Difference between revisions of "LMS-6 Radiosonde/APRS Firmware Mod"
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| − | == Introduction == | + | ==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. | + | 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 [[LMS-6 Radiosonde|parent page]] for reverse engineering information for the LMS-6 as-is. |
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| − | == Modules == | + | ==Modules== |
{| class="wikitable" | {| class="wikitable" | ||
|+ | |+ | ||
Latest revision as of 00:39, 28 September 2020
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.
Modules
| 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. |
