suspect-devices/circuitpython/stmhal/irq.h, branch esp-extra-scripts CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=esp-extra-scripts 2015-12-22T21:00:20+00:00 stmhal: Add pyb.irq_stats() to get statistics about IRQ calls. 2015-12-22T21:00:20+00:00 Damien George damien.p.george@gmail.com 2015-06-10T13:25:54+00:00 urn:sha1:401af50dc081faa421e7caef18fde2beb15632e4 Adds a lot of code, makes IRQs a bit less efficient, but is very useful for debugging. Usage: pyb.irq_stats() returns a memory view that can be read and written, eg: list(pyb.irq_stats()) pyb.irq_stats()[0] pyb.irq_stats()[0] = 0 The patch provides general IRQ_ENTER() and IRQ_EXIT() macros that can be modified to provide further IRQ statistics if desired. stmhal: Only use BASEPRI irq stuff if Cortex is M3 or higher. 2015-12-04T12:13:12+00:00 Damien George damien.p.george@gmail.com 2015-12-04T12:13:12+00:00 urn:sha1:dd7d2e0810b6835d4798c315fb53d2f552a07e9d stmhal: Add raise_irq_pri and restore_irq_pri functions. 2015-12-04T11:38:23+00:00 Damien George damien.p.george@gmail.com 2015-12-04T11:38:23+00:00 urn:sha1:95c9cc8114a7dd2bc73dc820d45ba8a97f16a60a These can be used to disable only certain interrupts, ones at or above the given priority value. stmhal: Increase the priority of UART IRQ. 2015-11-25T08:03:44+00:00 Dave Hylands dhylands@gmail.com 2015-11-24T18:22:30+00:00 urn:sha1:c8437f97ae1b9849bbb8e3abbf82a832cc901622 The UARTs have no FIFOs, so if interrupts are disabled for more than a character time (10 usec at 1 Mbit/sec) then characters get dropped. The overhead for handling a UART ISR is about 0.5 usec, so even at baud rates of 1 Mbit/sec this only corresponds to about 5% of the CPU. Lower baud rates will have less of an impact. stmhal/irq: Set all IRQ subpriorities to 0, since they aren't used. 2015-11-24T15:56:33+00:00 Damien George damien.p.george@gmail.com 2015-11-24T15:56:33+00:00 urn:sha1:3cfb02f1663fbf3a6d7ae367974d0984d3424806 stmhal/irq: Add comment about SDIO priority being higher than DMA. 2015-11-24T15:51:07+00:00 Damien George damien.p.george@gmail.com 2015-11-24T15:51:07+00:00 urn:sha1:18820471ae1b8c3977ed453da2d8f1fcfabda963 stmhal: Put IRQs into priority order. 2015-11-24T09:37:25+00:00 Dave Hylands dhylands@gmail.com 2015-11-15T22:23:02+00:00 urn:sha1:9f5486c7e2928435362b7ae06f0d678a4798693a - added some comments to explain the priority/sub-priority. - adds an entry for SDIO (to be used in a later patch) - increases DMA priority above USB so that DMA can be used for sdcard I/O when using USB Mass Storage. stmhal: Add symbolic #defines for interrupt levels in irq.h. 2015-11-01T23:23:39+00:00 Dave Curtis davecurtis@sonic.net 2015-10-31T17:44:20+00:00 urn:sha1:32b3549cce7a965d92a81db02c7adc973f08d74c stmhal: Make pyb.[u]delay use systick with IRQs, busy loop otherwise. 2014-11-30T21:23:25+00:00 Damien George damien.p.george@gmail.com 2014-11-30T21:23:25+00:00 urn:sha1:1960475ed7e190bcf537f8f7714a543b7513e2d5 pyb.delay and pyb.udelay now use systick if IRQs are enabled, otherwise they use a busy loop. Thus they work correctly when IRQs are disabled. The busy loop is computed from the current CPU frequency, so works no matter the CPU frequency. stmhal: Make enable_irq and disable_irq inline functions. 2014-08-25T12:24:33+00:00 Damien George damien.p.george@gmail.com 2014-08-25T12:24:33+00:00 urn:sha1:e5cbb70328239e58c820938eccd51f3c735fc312 These functions are generally 1 machine instruction, and are used in critical code, so makes sense to have them inline. Also leave these functions uninverted (ie 0 means enable, 1 means disable) and provide macro constants if you really need to distinguish the states. This makes for smaller code as well (combined with inlining). Applied to teensy port as well.