【Follow me第二季第4期】任务一：搭建环境并点亮RGBLED&串口输出
(https://www.eeworld.com.cn/huodong/digikey_follow_me_2024_04/?sid=102)---
### 任务准备
1. 硬件准备
1. Arduino® Nano RP2040 Connect开发板
2. USB-Micro B 数据线
2. 软件准备
1. 安装Arduino IDE（确保版本支持RP2040芯片）或者 PlatformIO
2. 安装RP2040的Board支持包
### 从零搭建环境(以PlatformIO为例）
1. 安装 VS Code
访问(https://code.visualstudio.com/Download)下载**System Installer**的安装包，根据步骤安装即可。
2. 安装 PlatformIO IDE
1. 在VS Code中点击左边栏的拓展（Ctrl+Shift+X）
2. 点击搜索框，搜索`PlatformIO IDE`
3. 点击安装
3. 安装RP2040支持包
1. 在VS Code中点击左边栏的PlatformIO
2. 点击Open->New Project
3. 在Board中选择Arduino Nano RP2040 Connect
4. 点击Finsh，等待非常长一段时间（示网络情况而定）
### Blink三色LED / 串口打印Hello DigiKey & EEWorld！
一开始以为，串口打印和Blink应该是很简单的事情，结果事实上并不简单。从上面的框图和介绍中可知，RGB LED连接的并不是 RP2040，而是一个叫NINA-W102的东西，一看介绍：240MHz 32位双核Xtensa LX6处理器！！！这不是ESP32嘛！！！并没有直接可以通过RP2040操作RGB LED的引脚，必须先通过SPI与ESP32进行通讯，然后再由ESP 32对RGB LED进行操作。不过官方文档给出了如何操作NINA的库和例程：(https://docs.arduino.cc/tutorials/nano-rp2040-connect/rp2040-web-server-rgb/)，例程如下：
```C++
#include <Arduino.h>
#include <WiFiNINA.h># 需要在Platform IO 中安装 WiFi NINA
void fadeLED(NinaPin ledPin)
{
for (int brightness = 255; brightness >= 0; brightness--)
{
analogWrite(ledPin, brightness);
delay(10);
}
for (int brightness = 0; brightness <= 255; brightness++)
{
analogWrite(ledPin, brightness);
delay(10);
}
}
void setup()
{
Serial.begin(115200);
pinMode(LEDR, OUTPUT);
pinMode(LEDG, OUTPUT);
pinMode(LEDB, OUTPUT);
digitalWrite(LEDR, LOW);
digitalWrite(LEDG, LOW);
digitalWrite(LEDB, LOW);
}
void loop()
{
Serial.println("Hello DigiKey & EEWorld！");
fadeLED(LEDR);
fadeLED(LEDG);
fadeLED(LEDB);
}
```
在`wifi_drv.cpp`可以看到具体实现如下：
```c++
……
void WiFiDrv::pinMode(uint8_t pin, uint8_t mode)
{
WAIT_FOR_SLAVE_SELECT();
// Send Command
SpiDrv::sendCmd(SET_PIN_MODE, PARAM_NUMS_2);
SpiDrv::sendParam((uint8_t*)&pin, 1, NO_LAST_PARAM);
SpiDrv::sendParam((uint8_t*)&mode, 1, LAST_PARAM);
// pad to multiple of 4
SpiDrv::readChar();
SpiDrv::spiSlaveDeselect();
//Wait the reply elaboration
SpiDrv::waitForSlaveReady();
SpiDrv::spiSlaveSelect();
// Wait for reply
uint8_t _data = 0;
uint8_t _dataLen = 0;
if (!SpiDrv::waitResponseCmd(SET_PIN_MODE, PARAM_NUMS_1, &_data, &_dataLen))
{
WARN("error waitResponse");
_data = WL_FAILURE;
}
SpiDrv::spiSlaveDeselect();
}
PinStatus WiFiDrv::digitalRead(uint8_t pin)
{
WAIT_FOR_SLAVE_SELECT();
// Send Command
SpiDrv::sendCmd(GET_DIGITAL_READ, PARAM_NUMS_1);
SpiDrv::sendParam((uint8_t*)&pin, 1, LAST_PARAM);
// pad to multiple of 4
SpiDrv::readChar();
SpiDrv::readChar();
SpiDrv::spiSlaveDeselect();
//Wait the reply elaboration
SpiDrv::waitForSlaveReady();
SpiDrv::spiSlaveSelect();
// Wait for reply
uint8_t _data = 0;
uint8_t _dataLen = 0;
if (!SpiDrv::waitResponseCmd(GET_DIGITAL_READ, PARAM_NUMS_1, &_data, &_dataLen))
{
WARN("error waitResponse");
_data = WL_FAILURE;
}
SpiDrv::spiSlaveDeselect();
if (_data == 1)
return HIGH;
else
return LOW;
}
void WiFiDrv::digitalWrite(uint8_t pin, uint8_t value)
{
WAIT_FOR_SLAVE_SELECT();
// Send Command
SpiDrv::sendCmd(SET_DIGITAL_WRITE, PARAM_NUMS_2);
SpiDrv::sendParam((uint8_t*)&pin, 1, NO_LAST_PARAM);
SpiDrv::sendParam((uint8_t*)&value, 1, LAST_PARAM);
// pad to multiple of 4
SpiDrv::readChar();
SpiDrv::spiSlaveDeselect();
//Wait the reply elaboration
SpiDrv::waitForSlaveReady();
SpiDrv::spiSlaveSelect();
// Wait for reply
uint8_t _data = 0;
uint8_t _dataLen = 0;
if (!SpiDrv::waitResponseCmd(SET_DIGITAL_WRITE, PARAM_NUMS_1, &_data, &_dataLen))
{
WARN("error waitResponse");
_data = WL_FAILURE;
}
SpiDrv::spiSlaveDeselect();
}
uint16_t WiFiDrv::analogRead(uint8_t adc_channel)
{
WAIT_FOR_SLAVE_SELECT();
// Send Command
SpiDrv::sendCmd(GET_ANALOG_READ, PARAM_NUMS_1);
SpiDrv::sendParam((uint8_t*)&adc_channel, 1, LAST_PARAM);
// pad to multiple of 4
SpiDrv::readChar();
SpiDrv::readChar();
SpiDrv::spiSlaveDeselect();
//Wait the reply elaboration
SpiDrv::waitForSlaveReady();
SpiDrv::spiSlaveSelect();
// Wait for reply
uint16_t adc_raw = 0;
uint8_t adc_raw_len = 0;
if (!SpiDrv::waitResponseCmd(GET_ANALOG_READ, PARAM_NUMS_1, (uint8_t*)&adc_raw, &adc_raw_len))
{
WARN("error waitResponse");
}
SpiDrv::spiSlaveDeselect();
return adc_raw;
}
void WiFiDrv::analogWrite(uint8_t pin, uint8_t value)
{
WAIT_FOR_SLAVE_SELECT();
// Send Command
SpiDrv::sendCmd(SET_ANALOG_WRITE, PARAM_NUMS_2);
SpiDrv::sendParam((uint8_t*)&pin, 1, NO_LAST_PARAM);
SpiDrv::sendParam((uint8_t*)&value, 1, LAST_PARAM);
// pad to multiple of 4
SpiDrv::readChar();
SpiDrv::spiSlaveDeselect();
//Wait the reply elaboration
SpiDrv::waitForSlaveReady();
SpiDrv::spiSlaveSelect();
// Wait for reply
uint8_t _data = 0;
uint8_t _dataLen = 0;
if (!SpiDrv::waitResponseCmd(SET_ANALOG_WRITE, PARAM_NUMS_1, &_data, &_dataLen))
{
WARN("error waitResponse");
_data = WL_FAILURE;
}
SpiDrv::spiSlaveDeselect();
}
……
```
### 如何烧录
短接REC到GND，双击按键即可进入烧录模式，将编译好的.uf2拖入即可。
### 项目文件及固件
### 实验截图
### 参考资料
(https://docs.arduino.cc/hardware/nano-rp2040-connect/)
(https://docs.arduino.cc/tutorials/nano-rp2040-connect/rp2040-web-server-rgb/)
(https://docs.arduino.cc/resources/datasheets/ABX00053-datasheet.pdf)
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