CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=0.9.0 2016-06-28T10:28:53+00:00 2016-06-28T10:28:53+00:00 Damien George damien.p.george@gmail.com 2016-06-05T12:01:16+00:00 urn:sha1:469c623bb8e504ca78f1964508579ecefec76a98 The 16k FreeRTOS heap originally had all TCBs and stacks dynamically allocated within it (plus semaphores and some other things). Now that xTaskCreateStatic is used instead of xTaskCreate, the TCBs and stacks are allocated statically and no longer use any of the FreeRTOS heap. Therefore, the FreeRTOS stack can be shrunk by the amount that has been made static. Furthermore, the TCBs and stack that are now static should be placed in the .rtos_heaps section of RAM because this RAM is treated specially by the bootloader (the bootloader executes from the first 16k of RAM and loads the firmware into the section starting after the 16k). After this patch the FreeRTOS heap (ucHeap) is 7200 bytes. The memory available for the MicroPython heap is 54936 bytes (including GC overhead). 2016-06-28T10:28:53+00:00 Damien George damien.p.george@gmail.com 2016-06-05T11:43:04+00:00 urn:sha1:1d5aa9d245362d060843688a97f12a86b8fe1e46 This config variable is now needed regardless of whether threading is enabled or not. 2016-06-28T10:28:51+00:00 Damien George damien.p.george@gmail.com 2016-05-27T16:35:46+00:00 urn:sha1:eef4f13a3390dc88902563acb047f0439eff0caf Can create a new thread and run it. Does not use the GIL at this point. 2016-06-28T10:28:50+00:00 Damien George damien.p.george@gmail.com 2016-05-27T13:28:15+00:00 urn:sha1:9b1c1262dc70cfb6b5cf5d27e3e3d8e41b5a4901 2016-06-28T10:28:50+00:00 Damien George damien.p.george@gmail.com 2016-05-27T13:23:56+00:00 urn:sha1:5c0fc73f33dde64d7e56f3f1ed85eb44957c804e This is a pristine copy (actually a subset of files) of upstream FreeRTOS v9.0.0. Modifications to the previous version of FreeRTOS (v8.1.2) included addition of __attribute__ ((section (".boot"))) to the following functions: pxPortInitialiseStack prvTaskExitError prvPortStartFirstTask xPortStartScheduler vPortSetupTimerInterrupt xTaskGenericCreate vTaskStartScheduler prvInitialiseTCBVariables prvInitialiseTaskLists prvAllocateTCBAndStack This attribute will need to be reinstated on a case-by-case basis because some of the above functions are now removed/changed. 2015-10-19T19:17:15+00:00 danicampora daniel@wipy.io 2015-10-19T09:41:04+00:00 urn:sha1:65f6324573db77a35152d09642b1f3e26eed3908 2015-04-11T11:35:05+00:00 Daniel Campora daniel@wipy.io 2015-04-10T19:02:07+00:00 urn:sha1:6e25d955f489ee3446c5af10ea28b1f9038a733b This has implications all over the place. I have to admit that you can instantly see that usability improves, but it costs 3K. At the same time I took the oportunity to rename the '/SFLASH' drive to '/flash' which improves compatibility with the pyboard. 2015-03-11T16:00:33+00:00 danicampora danicampora@gmail.com 2015-03-04T12:52:39+00:00 urn:sha1:9e44383e3f4092940a1e1b49a278978df99f7b08 Supports suspend and hibernate modes. Waking is possible throug GPIO and WLAN. The mpcallback class is generic and can be reused by other classes. 2015-03-11T15:59:29+00:00 danicampora danicampora@gmail.com 2015-03-02T13:11:02+00:00 urn:sha1:26cbc91373cdfff43317da01e102617ed5885655 Such functions are never used after MicroPython has started, and they remain in RAM wasting space. Now they are placed in a special section named "boot" which sits just before the heap, allowing us to extend the effective heap area up to the new boot section. Right now, this gives us back ~1K, but in the future, more functions might end up in there as well. 2015-02-26T10:18:18+00:00 danicampora danicampora@gmail.com 2015-02-26T09:54:55+00:00 urn:sha1:5330d8996f3e64447b48ffe2824f7911337b0d07 Before, both mutexes and semaphores were used. Using only the latter and with a bit of cleanup to remove some code bloat, we save ~600 bytes of code.