CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=6.1.0-alpha.0 2020-10-13T01:43:21+00:00 2020-10-13T01:43:21+00:00 Scott Shawcroft scott@tannewt.org 2020-10-13T01:36:18+00:00 urn:sha1:379e73af2e55b1f0c517883360e29d5dbc27a20b Fixes #3504 hopefully. 2020-10-07T22:23:47+00:00 Scott Shawcroft scott@tannewt.org 2020-09-29T02:21:17+00:00 urn:sha1:09bc4157516dd59754a3eb1a5dbbb72a758ebe93 This unifies the flash config to the settings used by the Boot ROM. This makes the config unique per board which allows for changing quad enable and status bit differences per flash device. It also allows for timing differences due to the board layout. This change also tweaks linker layout to leave more ram space for the CircuitPython heap. 2020-10-01T18:18:36+00:00 Scott Shawcroft scott@adafruit.com 2020-10-01T18:18:36+00:00 urn:sha1:d62ac24493abb7aadcf68751997092a1b4141b01 Add some NORETURN attributes 2020-09-29T05:44:30+00:00 microDev 70126934+microDev1@users.noreply.github.com 2020-09-29T05:44:30+00:00 urn:sha1:4c7d9e3aafbde08399d9839d6cde968f4d1ae005 2020-09-28T23:55:56+00:00 Jeff Epler jepler@gmail.com 2020-09-24T16:20:32+00:00 urn:sha1:726dcdb60aa84b5070e5484a19e896abdaffeb93 I have a function where it should be impossible to reach the end, so I put in a safe-mode reset at the bottom: ``` int find_unused_slot(void) { // precondition: you already verified that a slot was available for (int i=0; i<NUM_SLOTS; i++) { if( slot_free(i)) { return i; } } safe_mode_reset(MICROPY_FATAL_ERROR); } ``` However, the compiler still gave a diagnostic, because safe_mode_reset was not declared NORETURN. So I started by teaching the compiler that reset_into_safe_mode never returned. This leads at least one level deeper due to reset_cpu needing to be a NORETURN function. Each port is a little different in this area. I also marked reset_to_bootloader as NORETURN. Additional notes: * stm32's reset_to_bootloader was not implemented, but now does a bare reset. Most stm32s are not fitted with uf2 bootloaders anyway. * ditto cxd56 * esp32s2 did not implement reset_cpu at all. I used esp_restart(). (not tested) * litex did not implement reset_cpu at all. I used reboot_ctrl_write. But notably this is what reset_to_bootloader already did, so one or the other must be incorrect (not tested). reboot_ctrl_write cannot be declared NORETURN, as it returns unless the special value 0xac is written), so a new unreachable forever-loop is added. * cxd56's reset is via a boardctl() call which can't generically be declared NORETURN, so a new unreacahble "for(;;)" forever-loop is added. * In several places, NVIC_SystemReset is redeclared with NORETURN applied. This is accepted just fine by gcc. I chose this as preferable to editing the multiple copies of CMSIS headers where it is normally declared. * the stub safe_mode reset simply aborts. This is used in mpy-cross. 2020-09-17T23:32:06+00:00 Jeff Epler jepler@gmail.com 2020-09-03T18:36:15+00:00 urn:sha1:28043c94b5ea5f3cce11fa57afa9f3f0141b8dce These changes remove the caveat from supervisor.runtime.serial_connected. It appears that _tud_cdc_connected() only tracks explicit changes to the "DTR" bit, which leads to disconnects not being registered. Instead: * when line state is changed explicitly, track the dtr value in _serial_connected * when the USB bus is suspended, set _serial_connected to False Testing performed (using sam e54 xplained): Run a program to show the state of `serial_connected` on the LED: ``` import digitalio import supervisor import board led = digitalio.DigitalInOut(board.LED) while True: led.switch_to_output(not supervisor.runtime.serial_connected) ``` Try all the following: * open, close serial terminal program - LED status tracks whether terminal is open * turn on/off data lines using the switchable charge-only cable - LED turns off when switch is in "charger" position - LED turns back on when switch is in Data position and terminal is opened (but doesn't turn back on just because switch position is changed) 2020-09-16T18:10:22+00:00 Scott Shawcroft scott@adafruit.com 2020-09-16T18:10:22+00:00 urn:sha1:750bc1e04ac6f3c5bec7cb6d5f2bdf1e84c45f47 compression: Implement @ciscorn's dictionary approach 2020-09-15T18:18:04+00:00 Jeff Epler jepler@gmail.com 2020-09-15T18:18:04+00:00 urn:sha1:d9e336d39f7a19c47cd98619049f5d8e29512947 2020-09-13T17:47:14+00:00 microDev 70126934+microDev1@users.noreply.github.com 2020-09-13T17:47:14+00:00 urn:sha1:506bb097f7af5118a4e52a9471fe4599e681ba39 2020-09-13T17:27:24+00:00 microDev 70126934+microDev1@users.noreply.github.com 2020-09-13T17:27:24+00:00 urn:sha1:36da92075b6b83a6b1a998b377f340524d143f35