Chain Key 使用教程

1.准备工作

环境配置：参考 Arduino IDE 上手教程完成 IDE 安装，并根据实际使用的开发板安装对应的板管理与需要的驱动库。
使用到的驱动库：
- M5Chain

使用到的硬件产品：
- Chain DualKey
- Chain 系列连接器，如 Chain Bridge 或 Chain Return
- Chain Key

2.示例程序

编译要求

M5Stack 板管理版本 >= 3.2.4
M5Chain 库版本 >= 1.0.0

cpp 
#include "M5Chain.h"

#define RXD_PIN GPIO_NUM_5  // 47 for the other side of Chain DualKey
#define TXD_PIN GPIO_NUM_6  // 48 for the other side of Chain DualKey

Chain M5Chain;

device_list_t *device_list = NULL;
uint16_t device_count = 0;
uint8_t opr_status = 0;

uint8_t button_status;
chain_button_press_type_t button_press_type;

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial.println("===========================");
  Serial.println("M5Stack Chain Key Test");

  M5Chain.begin(&Serial2, 115200, RXD_PIN, TXD_PIN);
  while (!M5Chain.isDeviceConnected()) {
    Serial.println("No device connected");
    delay(1000);
  }

  M5Chain.getDeviceNum(&device_count);
  device_list = (device_list_t *)malloc(sizeof(device_list_t));
  device_list->count = device_count;
  device_list->devices = (device_info_t *)malloc(sizeof(device_info_t) * device_count);
  M5Chain.getDeviceList(device_list);

  if (device_list->devices[0].device_type == CHAIN_KEY_TYPE_CODE) {
    Serial.println("ID[1] is Chain Key");
  } else {
    Serial.println("ID[1] is NOT Chain Key");
    return;
  }

  // Device ID, double click interval (100MS/200MS/.../900MS/1000MS), long press interval (3S/4S/.../9S/10S), operation status
  M5Chain.setKeyButtonTriggerInterval(1, BUTTON_DOUBLE_CLICK_TIME_500MS, BUTTON_LONG_PRESS_TIME_5S, &opr_status);
  Serial.println("Set double and long press intervals\n");
  delay(1000);
}

void loop() {
  M5Chain.getKeyButtonStatus(1, &button_status);  // Device ID
  // Serial.print("button_status: ");
  // Serial.println(button_status);

  while (M5Chain.getKeyButtonPressStatus(1, &button_press_type)) {  // Device ID
    switch (button_press_type) {
      case CHAIN_BUTTON_PRESS_SINGLE:
        Serial.println("Single pressed");
        break;
      case CHAIN_BUTTON_PRESS_DOUBLE:
        Serial.println("Double pressed");
        break;
      case CHAIN_BUTTON_PRESS_LONG:
        Serial.println("Long pressed");
        break;
    }
  }
}