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Forum Index : Microcontroller and PC projects : H7 DevEBox core temp 50 Deg C
| Author | Message | ||||
| Glen0 Regular Member  Joined: 12/10/2014 Location: New ZealandPosts: 95 |
OPTION LIST ARMmite H7 MMBasic Version 5.07.02b1 OPTION SDCARD 79 > LIST ALL 'H7 Core Temp Test Do CORE = Pin("TEMP" ) Pause 100 Print CORE Pause 10000 Loop > RUN 49.58572498 50.06488645 50.16471175 50.06488645 50.08485151 50.12478163 > Is a core temperature of 50°C normal?. Ambient temperature in the room is about 23°C. Am I using the latest Firmware?  |
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disco4now Guru  Joined: 18/12/2014 Location: AustraliaPosts: 1000 |
I am a bit suspicious on the readings. I have a DevEBox and a WeAct board. See the WeAct log below. This starts at 31 minutes and goes for about 8 minutes. It is showing Temp and BAT. You see at 32:02 I have sprayed it with circuit board cleaner and it went to around 25 degrees. Over the next 8 minutes it return to about where it was before being cooled and stabilised, but was obviously wrong as it heated up and return to its previous temperature the reading are nowhere near linear. (134 degrees would be pretty hot). The DevEBox was similar. I will have to look further at it and see what the Nucleo board does. 39.74538193 00:31:11 3.179803159 39.84523215 00:31:21 3.180004578 39.80529206 00:31:31 3.179803159 39.84523215 00:31:41 3.180407416 39.84523215 00:31:51 3.163286793 28.14278582 00:32:02 3.162078279 31.83724413 00:32:12 3.147576104 25.30703944 00:32:22 3.149590295 30.07988018 00:32:32 3.147374685 34.79281078 00:32:42 3.146569009 38.86669995 00:32:53 3.147978943 42.14178732 00:33:03 3.146166171 45.99600599 00:33:06 3.144957656 52.64603095 00:33:06 3.142943465 58.93659511 00:33:06 3.141533532 65.08736895 00:33:06 3.13972076 70.11982027 00:33:06 3.136296635 77.20918622 00:33:06 3.132469673 87.97304044 00:33:06 3.126829938 103.1702446 00:33:06 3.123002976 112.9555667 00:33:06 3.118773175 123.3000499 00:33:11 3.115751888 127.3939091 00:33:22 3.116154726 129.6704943 00:33:32 3.11534905 132.9655517 00:33:42 3.114744793 132.8457314 00:33:52 3.116356146 133.3449825 00:34:03 3.116356146 134.9425861 00:34:13 3.117766079 133.4847728 00:34:23 3.116960403 133.9440839 00:34:33 3.118571756 133.6445332 00:34:43 3.120183108 131.4877683 00:34:54 3.122197299 128.6919621 00:35:04 3.121794461 127.7533699 00:35:14 3.12421149 124.8377434 00:35:24 3.125218585 122.2416375 00:35:34 3.126829938 119.9450824 00:35:45 3.128239872 117.6884673 00:35:55 3.130254063 114.5132302 00:36:05 3.132671092 111.5776335 00:36:15 3.134685283 106.7848228 00:36:25 3.136095216 104.9076385 00:36:36 3.138109407 102.5511732 00:36:46 3.140123598 97.03944084 00:36:56 3.143346304 92.06689965 00:37:06 3.148381781 79.50574139 00:37:17 3.158049897 57.51872192 00:37:27 3.163891051 47.07438842 00:37:37 3.167516594 40.48427359 00:37:47 3.168725109 39.80529206 00:37:57 3.16852369 39.52571143 00:38:08 3.169732204 39.38592112 00:38:18 3.169530785 39.28607089 00:38:28 3.170940719 39.22616076 00:38:38 3.171343557 39.18622067 00:38:48 3.170940719 39.08637044 00:38:59 3.172350652 39.16625062 00:39:09 Latest F4 Latest H7 FotS |
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| Glen0 Regular Member Joined: 12/10/2014 Location: New ZealandPosts: 95 |
That does look wierd but I think my figures are realistic. I measured the surface temp for about half an hour and this is what it got up to. Is there an erase program like flash nuke for this micro. I think I have another H7 somewhere. If I can find it it I'll test it as well. What is the latest FW version?  49.70551535 49.74544547 49.72548041 49.70551535 49.74544547 49.76541053 49.76541053 49.74544547 49.76541053 49.74544547 49.78537559 49.78537559 49.78537559 49.76541053 49.72548041 49.76541053 49.74544547 49.76541053 49.76541053 49.72548041 49.72548041 21:17:49 Port: COM20 removed Disconnected |
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| Glen0 Regular Member Joined: 12/10/2014 Location: New ZealandPosts: 95 |
Found the other H7 and loaded Version 5.07.02b1. Measured the surface of the processor, after 30 minutes it got to just over 42°C CORE = Pin("TEMP" ) results below are from the last 2 minutes 48.08474161 48.12392848 48.12392848 48.18270879 48.12392848 48.18270879 48.08474161 48.10433505 48.12392848 48.12392848 48.20230223 48.18270879 Looks like it's normal for these things run quite warm. I will monitor the temperature when I get it to do some real work. |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7856 |
If you get nervous put a little sticky heatsink on it. It won't do any harm anyway. Remember, the die temperature is always higher than the package temperature, and that is the most important figure. The package is losing temperature to the board by conduction and the surrounding space by air convection and radiation. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Glen0 Regular Member Joined: 12/10/2014 Location: New ZealandPosts: 95 |
Thanks. I just thought it might be abnormal and that maybe it was something I had or hadn't done. The board gets quite warm so cooling will need to be considered if it is to go into a small enclosure where there is little or no ventilation. Cheers |
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