STM32F103C8T6在arduino下的例程实验

经前述环境构建好后，接下来就要跑跑例程了。

1. 串口例程

串口例程无需引用外部库

void setup() {
  // initialize both serial ports:
  Serial1.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);

}

void loop() {
  // read from port 1, send to port 0:
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  Serial1.print("running....\n");
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);

}

将串口１，即PA9/PA10接到串口转换模块，打开monitor选择串口模块对应的端口，例如/dev/ttyUSB0，运行可以看到连续打印

2. WS2812驱动的幻彩RGB灯带

驱动库为stm32包自带的ws2812B.h

void setup()
{
  strip.begin();// Sets up the SPI
  strip.show();// Clears the strip, as by default the strip data is set to all LED's off.
 // strip.setBrightness(8);
}

void loop()
{
  colorWipe(strip.Color(0, 255, 0), 20); // Green
  colorWipe(strip.Color(255, 0, 0), 20); // Red
  colorWipe(strip.Color(0, 0, 255), 20); // Blue
  rainbow(10);
  rainbowCycle(10);
  theaterChase(strip.Color(255, 0, 0), 20); // Red
  theaterChase(strip.Color(0, 255, 0), 20); // Green
  theaterChase(strip.Color(0, 0, 255), 20); // Blue
  theaterChaseRainbow(10);
  whiteOverRainbow(20,75,5);  
  pulseWhite(5);
  delay(250);
  fullWhite();
  delay(250);
  rainbowFade2White(3,3,1);
}

初始化灯阵，然后是各种特效，不得不说，简单的功能组合出来的效果不简单。

3.USB-HID设备功能开发

F103有很强大的USB功能，可是开发并不容易，在Arduino加持下，一切变得简单。

#include

USBHID HID;
HIDKeyboard Keyboard(HID);

void setup() {
  HID.begin(HID_KEYBOARD);
  Keyboard.begin(); // useful to detect host capslock state and LEDs
  delay(1000);
}

void loop() {
 
  Keyboard.println("Hello world");
  delay(10000);
}

只需调用原装包里的composite库，然后定义为HIDKeyboard设备，就可以在插上USB 线后识别为HID设备，并发送字符串

这样的话，加上RF520模组，可以轻易自制读卡器，比如用按键选择位数，十几块搞定，太强了。

4. OLED显示屏驱动

OLED 现在用的比液晶多，几乎是必备的输出显示装置，不过在这里有一点挫折，也有额外的收获，开始引用了几个驱动库，都有各种各样的问题。能用的是ACROBOTIC_SSD1306这个，也顺带了解了Arduino库的生成和导入，扩展开发等

目录结构见上图，如果需要二次开发，需要在头文件定位新的操作，在cpp里进行扩展即可。

基本的字符，图标显示都实现了，滚动研究了下，没有直接的函数实现，有机会在深入研究。

5.　运行FREERTOS 例程

创建freertos应用也是很简单，当然，例程太基础了，要完整的学习，要参考其他平台的freertos 例程，把队列，消息啥的都搞明白。

#include

static void vLEDFlashTask(void *pvParameters) {
    for (;;) {
        vTaskDelay(1000);
        digitalWrite(LED_BUILTIN, LOW);
        vTaskDelay(50);
        digitalWrite(LED_BUILTIN, HIGH);
    }
}
static void vPrintTask(void *pvParameters)
{int i=0;
  for(;;){
    i++;
  Serial1.print("task2 running: ");
  Serial1.print(i);
  Serial1.print("...\n");
  vTaskDelay(1000);}
  }
void setup() {
    // initialize the digital pin as an output:
    pinMode(LED_BUILTIN, OUTPUT);
Serial1.begin(115200);

    xTaskCreate(vLEDFlashTask,
                "Task1",
                configMINIMAL_STACK_SIZE,
                NULL,
                tskIDLE_PRIORITY + 2,
                NULL);
    xTaskCreate(vPrintTask,
                "Task2",
                configMINIMAL_STACK_SIZE,
                NULL,
                tskIDLE_PRIORITY + 2,
                NULL);
    vTaskStartScheduler();
}

void loop() {
    // Insert background code here
}

这几个方面已经可以组合出很多应用了。

６.定时器中断

原装包里就有定时器中断，实测１－３可以正常使用，４编译可以通过，但不能正常使用，原因不明

/*
 Timer Interrupts Example

 Demonstrates usage of the HardwareTimer classes by blinking the LED
 
 Created 22 April 2010, last updated 8 June 2010
 By Bryan Newbold for LeafLabs
 This code is released with no strings attached.
 
 */
#include
#include
#define LED_PIN PC13
//#define BUTTON_PIN 38
#define LED_RATE 500000    // in microseconds; should give 0.5Hz toggles

void handler_led(void);
void handler_count1(void);
void handler_count2(void);

int toggle = 0;

int count1 = 0;
int count2 = 0;
int int_status=0;
void setup()
{
       // Set up the LED to blink
    pinMode(LED_PIN, OUTPUT);
Wire.begin();
  oled.init();                      // Initialze SSD1306 OLED display
  oled.setFont(font8x8);            // Set font type (default 8x8)
  oled.clearDisplay();              // Clear screen
  oled.setTextXY(0,0);
  oled.putString("Hello,welcome");
 

    // Setup LED Timer
    Timer2.setMode(TIMER_CH1, TIMER_OUTPUTCOMPARE);
    Timer2.setPeriod(LED_RATE); // in microseconds
    Timer2.setCompare(TIMER_CH1, 1);      // overflow might be small
    Timer2.attachInterrupt(TIMER_CH1, handler_led);

    Timer1.setMode(TIMER_CH1, TIMER_OUTPUTCOMPARE);
    Timer1.setPeriod(LED_RATE); // in microseconds
    Timer1.setCompare(TIMER_CH1, 1);      // overflow might be small
    Timer1.attachInterrupt(TIMER_CH1, handler2);
//    Timer4.setMode(TIMER_CH1, TIMER_OUTPUTCOMPARE);
//    Timer4.setPeriod(LED_RATE*3); // in microseconds
//    Timer4.setCompare(TIMER_CH1, 1);      // overflow might be small
//    Timer4.attachInterrupt(TIMER_CH1, handler2);
}

void loop() {
if(int_status==10){
  refresh();
  int_status=0;}
}

void handler_led(void) {
     digitalWrite(LED_PIN,!digitalRead(LED_PIN));
    // count1++;
    // int_status+=1;
}

void handler1(void) {
    count1++;
    int_status+=1;
    //refresh();
}
void handler2(void) {
    count2++;
    int_status+=1;
    //refresh();
}

void refresh(){
  Timer3.pause();
  Timer4.pause();
  oled.clearDisplay();
  oled.setTextXY(0,0);              // Set cursor position, start of line 0
  oled.putString("time1: ");
  oled.setTextXY(0,30);
  oled.putNumber(count1);
    oled.setTextXY(2,0);              // Set cursor position, start of line 0
  oled.putString("time2: ");
  oled.setTextXY(2,30);
  oled.putNumber(count2);
  Timer3.resume();
  Timer4.resume();
 
 
  }