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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OOKA5EYD462FA5HCVPSVJ27OLAXEFJL2/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "OOKA5EYD462FA5HCVPSVJ27OLAXEFJL2",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/OOKA5EYD462FA5HCVPSVJ27OLAXEFJL2/?format=api",
    "sender": {
        "address": "bstrick (a) N5BRG.COM",
        "mailman_id": "953542c988dd4c549175bb02a8a6a1ed",
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    "sender_name": "Bob Stricklin",
    "subject": "[pacsat-dev] Re: Prototype Quad RX 1 TX boards",
    "date": "2024-02-27T01:32:13Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
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    "content": "The AX5043 has a 65K pull-up on the IRQ line. It interrupts by taking this line to a high state. The data sheet dose not say this but the output must be driven low when not in IRQ state. Seems like a odd way to do this so I may be reading it wrong. Output lines are supposed to support up to 40 mA. So you could probably cause an interrupt by using a 1K resistor with a jumper on it. Connect the jumper to 3.3V (Tab of the big regulator standing up and bent over) and tap the other end of the resistor on the IRQ line. You should get a single pulse and not damage anything.\r\n\r\nBob\r\n\r\nOn Feb 26, 2024, at 7:15 PM, Burns Fisher (AMSAT) via pacsat-dev <[email protected]<mailto:[email protected]>> wrote:\r\n\r\nAlso remember that none of the interrupt lines has been tested.  As I recall Tx does not need it, but Rx does.  This could be software.  Is it possible to jump the IRQ line manually somehow to see if you get an interrupt out of it?\r\n\r\n73,\r\n\r\nBurns Fisher, WB1FJ\r\nAMSAT(R) Engineering -- Flight Software\r\n\r\n\r\nOn Mon, Feb 26, 2024 at 8:05 PM Bob Stricklin via pacsat-dev <[email protected]<mailto:[email protected]>> wrote:\r\nBoth Chris and Jim have their boards to work with. Chris has started to work with his and rotors TX is sending packets but not receiving any packets yet. Still working to understand issue.\r\n\r\nIt could be hardware or software.\r\n\r\nTo help sort out issues with the AX5043 I have made up a table (attached) to correlate the Select, IRQ lines with the physical chip on the board. All four AX5043s should have an RX signal so in theory any one of them could be used to receive signals. However there could be a hardware issue with any of them. The RX3 AX5043 at the top of board is configured to work single ended. The three other devices are working differentially. The code may need different register settings for each of these to work properly but in terms of the AX5043 I think they all should be looking for a differential signal. I expect the signal strength of RX3 will be lower.\r\n\r\nBob\r\n\r\n-----------------------------------------------------------\r\n\r\npacsat-dev mailing list -- [email protected]<mailto:[email protected]>\r\nView archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected]\r\nTo unsubscribe send an email to [email protected]<mailto:[email protected]>\r\nManage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org<https://mailman.amsat.org/>\r\n\r\n-----------------------------------------------------------\r\n\r\npacsat-dev mailing list -- [email protected]<mailto:[email protected]>\r\nView archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected]\r\nTo unsubscribe send an email to [email protected]<mailto:[email protected]>\r\nManage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org\r\n\r\n\n\n",
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