bda630e419
Using all the work from @hfellner and others, add FreeRTOS SMP support. Allow idling cores through the FreeRTOS FIFO queue to allow for file system and EEPROM support. Make delay a weak function so FreeRTOS can override. Add cycle count support under FreeRTOS using a PIO SM. Use a task-based approach for handling the USB periodic work instead of the IRQ-based one in the main core. Set 8 prio levels so it fits in 3 bits nicely (0..7).
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*
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delay() for the Raspberry Pi Pico RP2040
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Copyright (c) 2021 Earle F. Philhower, III <earlephilhower@yahoo.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <pico.h>
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#include <pico/time.h>
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#ifdef USE_TINYUSB
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#include "Adafruit_TinyUSB_API.h"
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#endif
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extern "C" void delay(unsigned long ms) __attribute__((weak));
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extern "C" void yield() __attribute__((weak));
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extern "C"
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{
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void delay(unsigned long ms) {
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if (!ms) {
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return;
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}
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sleep_ms(ms);
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}
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void delayMicroseconds(unsigned int usec) {
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if (!usec) {
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return;
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}
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sleep_us(usec);
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}
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void yield() {
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#ifdef USE_TINYUSB
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TinyUSB_Device_Task();
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TinyUSB_Device_FlushCDC();
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#endif
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}
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uint32_t millis() {
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return to_ms_since_boot(get_absolute_time());
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}
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uint32_t micros() {
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return to_us_since_boot(get_absolute_time());
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}
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} // extern C
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