74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
#include "esphome/core/helpers.h"
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#include "esphome/core/defines.h"
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#ifdef USE_RP2040
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#include "esphome/core/hal.h"
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#if defined(USE_WIFI)
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#include <WiFi.h>
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#include <pico/cyw43_arch.h> // For cyw43_arch_lwip_begin/end (LwIPLock)
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#endif
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#include <hardware/structs/rosc.h>
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#include <hardware/sync.h>
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namespace esphome {
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uint32_t random_uint32() {
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uint32_t result = 0;
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for (uint8_t i = 0; i < 32; i++) {
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result <<= 1;
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result |= rosc_hw->randombit;
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}
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return result;
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}
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bool random_bytes(uint8_t *data, size_t len) {
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while (len-- != 0) {
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uint8_t result = 0;
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for (uint8_t i = 0; i < 8; i++) {
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result <<= 1;
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result |= rosc_hw->randombit;
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}
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*data++ = result;
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}
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return true;
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}
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// RP2040 doesn't have mutexes, but that shouldn't be an issue as it's single-core and non-preemptive OS.
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Mutex::Mutex() {}
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Mutex::~Mutex() {}
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void Mutex::lock() {}
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bool Mutex::try_lock() { return true; }
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void Mutex::unlock() {}
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IRAM_ATTR InterruptLock::InterruptLock() { state_ = save_and_disable_interrupts(); }
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IRAM_ATTR InterruptLock::~InterruptLock() { restore_interrupts(state_); }
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// On RP2040 (Pico W), arduino-pico sets PICO_CYW43_ARCH_THREADSAFE_BACKGROUND=1.
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// This means lwip callbacks run from a low-priority user IRQ context, not the
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// main loop (see low_priority_irq_handler() in pico-sdk
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// async_context_threadsafe_background.c). cyw43_arch_lwip_begin/end acquires the
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// async_context recursive mutex to prevent IRQ callbacks from firing during
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// critical sections. See esphome#10681.
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//
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// When CYW43 is not available (non-WiFi RP2040 boards), this is a no-op since
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// there's no network stack and no lwip callbacks to race with.
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#if defined(USE_WIFI)
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LwIPLock::LwIPLock() { cyw43_arch_lwip_begin(); }
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LwIPLock::~LwIPLock() { cyw43_arch_lwip_end(); }
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#else
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LwIPLock::LwIPLock() {}
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LwIPLock::~LwIPLock() {}
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#endif
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void get_mac_address_raw(uint8_t *mac) { // NOLINT(readability-non-const-parameter)
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#ifdef USE_WIFI
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WiFi.macAddress(mac);
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#endif
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}
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} // namespace esphome
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#endif // USE_RP2040
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