关于板子详细信息请点击上方连接，这里不多介绍。
首先介绍软件环境：Atom+PlatformIO（Visual Studio Code+PlatformIO）两种都可以，其本质就是基于两个代码编译器上去运行PlatformIO组件（需要科学上网）
首先安装ESP32的平台和WS2812的驱动库
然后新建一个工程模板，将一下代码放入其中
//BIT NEW
//BPI - BIT test code
#include <Arduino.h>
#include <NeoPixelBus.h>
#include "WiFi.h"
#define LEDC_CHANNEL_0 0
#define LEDC_TIMER_13_BIT 13
#define LEDC_BASE_FREQ 4500
const char *ssid = "SSID";
const char *password = "PASSWD";
const uint16_t PixelCount = 25;
const uint8_t PixelPin = 4;
#define colorSaturation 64
#define delay_ms 500
#define bout 3
NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
RgbColor red(colorSaturation, 0, 0);
RgbColor green(0, colorSaturation, 0);
RgbColor blue(0, 0, colorSaturation);
RgbColor white(colorSaturation);
RgbColor black(0);
HslColor hslRed(red);
HslColor hslGreen(green);
HslColor hslBlue(blue);
HslColor hslWhite(white);
HslColor hslBlack(black);
#define LUM0 36 //ADC1_CH0
#define LUM1 39 //ADC1_CH3
#define Temp 34 //ADC2_CH7
#define Buzzer 25
#define BottomA 35
#define BottomB 27
int LUM_Value0 = 0;
int LUM_Value1 = 0;
int Temp_value = 0;
int adTestFreq = 0;
int wifiTestFreq = 0;
int ledTestFreq = 0;
int BuzzerTestFreq = 0;
int brightness = 0;
int fadeAmount = 5;
void ledcAnalogWrite(uint8_t channel, uint32_t value)
{
// calculate duty, 8191 from 2 ^ 13 - 1 (2 ^ LEDC_TIMER_13_BIT - 1)
//value_MAX = 255
uint32_t duty = (8191 / 255) * value;
// write duty to LEDC
ledcWrite(channel, duty);
}
void setup()
{
Serial.begin(115200); //Serial Port Config 115200-8-N-1
while (!Serial)
; // wait for serial attach
Serial.println();
Serial.println("Initializing...");
Serial.flush();
// this resets all the neopixels to an off state
strip.Begin();
strip.Show();
Serial.println();
Serial.println("BPI-BIT Function Test Demo");
Serial.println("Running...");
Serial.println();
ledcSetup(LEDC_CHANNEL_0, LEDC_BASE_FREQ, LEDC_TIMER_13_BIT);
ledcAttachPin(Buzzer, LEDC_CHANNEL_0);
}
void loop()
{
/**************************************************************
**************************************************************
***Board:BPI-Webduino:BIT ***
***Function:LED(WS2812) Test ***
**************************************************************
*************************************************************/
Serial.println();
Serial.println("LED test!!!");
Serial.println();
for (ledTestFreq = 0; ledTestFreq < bout; ledTestFreq++)
{
int i;
delay(delay_ms);
Serial.println("Colors R");
for (i = 0; i <= PixelCount - 1; i++)
{
strip.SetPixelColor(i, hslRed);
strip.Show();
}
delay(delay_ms);
Serial.println("Colors B");
for (i = 0; i <= PixelCount - 1; i++)
{
strip.SetPixelColor(i, hslBlue);
strip.Show();
}
delay(delay_ms);
Serial.println("Colors G");
for (i = 0; i <= PixelCount - 1; i++)
{
strip.SetPixelColor(i, hslGreen);
strip.Show();
}
delay(delay_ms);
Serial.println("Colors W");
for (i = 0; i <= PixelCount - 1; i++)
{
strip.SetPixelColor(i, hslWhite);
strip.Show();
}
delay(delay_ms);
Serial.println("Turn Off");
for (i = 0; i <= PixelCount - 1; i++)
{
strip.SetPixelColor(i, hslBlack);
strip.Show();
}
Serial.println();
}
Serial.println("--Over--");
/**************************************************************
**************************************************************
***Board:BPI-Webduino:BIT ***
***Function:ADC Test ***
**************************************************************
*************************************************************/
Serial.println();
Serial.println("ADC test!!!");
Serial.println();
for (adTestFreq = 0; adTestFreq < bout; adTestFreq++)
{
// turn the LED on (HIGH is the voltage level)
LUM_Value0 = analogRead(LUM0);
LUM_Value1 = analogRead(LUM1);
Temp_value = analogRead(Temp);
Serial.println();
Serial.println("----LUM&Temp Test(AD Test)----");
//LUM0--ADC1_CH0-Pin:IO36
Serial.print("LUM0:");
Serial.print(LUM_Value0);
Serial.println();
//LUM1--ADC1_CH3-Pin:IO39
Serial.print("LUM1:");
Serial.print(LUM_Value1);
Serial.println();
//Temp--ADC2_CH7-Pin:IO27
Serial.print("TEMP:");
Serial.print(Temp_value);
Serial.println();
delay(delay_ms);
Serial.println();
}
Serial.println("--Over--");
/**************************************************************
**************************************************************
***Board:BPI-Webduino:BIT ***
***Function:Wi-Fi Test ***
**************************************************************
*************************************************************/
Serial.println();
Serial.println("Wi-Fi test!!!");
Serial.println();
// //Wi-Fi connect
// Serial.print("Connecting to ");
// Serial.println(ssid);
// WiFi.begin(ssid, password);
// while (WiFi.status() != WL_CONNECTED)
// {
// delay(500);
// Serial.print(".");
// }
// Serial.println("WiFi connected");
// Serial.println("IP address: ");
// Serial.println(WiFi.localIP());
// Serial.println("Setup done");
// Serial.println("");
// WiFi.disconnect();
for (wifiTestFreq = 0; wifiTestFreq < 1; wifiTestFreq++)
{
Serial.println("scan start");
// WiFi.scanNetworks will return the number of networks found
int n = WiFi.scanNetworks();
Serial.println("scan done");
if (n == 0)
{
Serial.println("no networks found");
}
else
{
Serial.print(n);
Serial.println(" networks found");
for (int j = 0; j < n; ++j)
{
// Print SSID and RSSI for each network found
Serial.print(j + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(j));
Serial.print(" (");
Serial.print(WiFi.RSSI(j));
Serial.print(")");
Serial.println((WiFi.encryptionType(j) == WIFI_AUTH_OPEN) ? " " : "*");
delay(10);
}
}
Serial.println("");
// Wait a bit before scanning again
delay(2000);
}
Serial.println("--Over--");
/**************************************************************
**************************************************************
***Board:BPI-Webduino:BIT ***
***Function:Buzzer Test ***
**************************************************************
*************************************************************/
Serial.println();
Serial.println("Buzzer Test!!!");
Serial.println();
Serial.println("Buzzer is fading");
for (BuzzerTestFreq = 0; BuzzerTestFreq < bout; BuzzerTestFreq++)
{
for (brightness = 0; brightness < 255; brightness++)
{
Serial.print(".");
// set the brightness on LEDC channel 0
ledcAnalogWrite(LEDC_CHANNEL_0, brightness);
// change the brightness for next time through the loop:
brightness = brightness + fadeAmount;
// reverse the direction of the fading at the ends of the fade:
if (brightness <= 0 || brightness >= 255)
{
fadeAmount = -fadeAmount;
}
// wait for 30 milliseconds to see the dimming effect
delay(30);
}
Serial.println();
ledcAnalogWrite(LEDC_CHANNEL_0, 0);
}
Serial.println("--Over--");
Serial.println("---------Test Over !!!---------");
}
编译通过后，将BIT板连接至电脑，下载进BIT板。程序会自动运行，
WS2812可编程全色彩LED测试循环三次（显示颜色顺序：Red、Blue、Green、white、Black）
ADC采样三次（通道：ADC1_CH0(LUM0)/ADC1_CH3(LUM1)/ADC1_CH6(TEMP)）
Wi-Fi扫描一次（扫描可用Wi-Fi信号以及信号强度）
蜂鸣器测试三次（采用占空比渐变的方式循环测试三次）
测试结果返回查看方法：
串口 115200-8-N-1的设置就好，会显示每一步的测试结果
测试视频：