cute-handshake-capture/handshake-capture-c6/SPI_Bus_Lock.cpp

#include "SPI_Bus_Lock.h"
#include <freertos/FreeRTOS.h>
#include <freertos/semphr.h>

static SemaphoreHandle_t s_spi_bus_mutex = nullptr;
static volatile bool s_display_paused = false;

static void ensureMutex() {
  if (s_spi_bus_mutex == nullptr) {
    s_spi_bus_mutex = xSemaphoreCreateRecursiveMutex();
  }
}

void SPIBus_Init() {
  ensureMutex();
}

void SPIBus_Lock() {
  ensureMutex();
  if (s_spi_bus_mutex != nullptr) {
    xSemaphoreTakeRecursive(s_spi_bus_mutex, portMAX_DELAY);
  }
}

void SPIBus_Unlock() {
  if (s_spi_bus_mutex != nullptr) {
    xSemaphoreGiveRecursive(s_spi_bus_mutex);
  }
}

void SPIBus_SetDisplayPaused(bool paused) {
  s_display_paused = paused;
}

bool SPIBus_IsDisplayPaused() {
  return s_display_paused;
}