STM32F072B Discovery Board unboxing + FreeRTOS v8.2.3 + USB_VCP_HID

1. 最近在露天買了一張stm32f072b discovery board, 基本上stm32f072 = stm32f051 + usb,  而在研
    究了一下之後, 也順手將FreeRTOS v8.2.3和USB Virtual Com-Port & HID移植完畢, 接著會將
    移植的過程簡單的描述一下.

2. main flow:

• 基本上就是先對LED & USB 來做Init.

/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
int main(void)
{
  
  RCC_ClocksTypeDef RCC_Clocks;
  RCC_GetClocksFreq(&RCC_Clocks);
  
  /* Steup Hardware. */
  prvSetupHardware();
  
  /* Create task. */
  vAltStartTask1Tasks( mainCREATOR_TASK_PRIORITY);    //Task1
  vAltStartTask2Tasks( mainCREATOR_TASK_PRIORITY);    //Task2
  
  /* Start the scheduler. */
  vTaskStartScheduler();
 
  /* Will only get here if there was not enough heap space to create the idle task. */
  return 0;
}

static void prvSetupHardware( void )
{
  /* LED Init. */
  STM_EVAL_LEDInit(LED3);
  STM_EVAL_LEDInit(LED4);
  STM_EVAL_LEDInit(LED5);
  STM_EVAL_LEDInit(LED6);
  
  STM_EVAL_LEDOff(LED3);
  STM_EVAL_LEDOff(LED4);
  STM_EVAL_LEDOff(LED5);
  STM_EVAL_LEDOff(LED6);
  
  /* USB VCP or HID Init. */
  USB_Init();
}

• USB VCP & HID的切換在usb_define.h裡面去做選擇.

 

• Task1: 就是固定每100msec去Toggle LED3而已.

//Task1
static portTASK_FUNCTION( vTask1FunctionTask, pvParameters )           
{
        portTickType xLastWakeTime;
          
 /* Just to stop compiler warnings. */
 ( void ) pvParameters;
        xLastWakeTime = xTaskGetTickCount();

 for( ;; )
 {
          Task1Task_Counter++;
          STM_EVAL_LEDToggle(LED3);  
          vTaskDelayUntil( &xLastWakeTime, ( 100 / portTICK_RATE_MS ) );
 }
}

• Task2: 固定每200msec會去Toggle LED6外, 還會根據usb_define選擇的結果來輸出VCP or HID測試信號.

//Task2
static portTASK_FUNCTION( vTask2FunctionTask, pvParameters )             
{        
        portTickType xLastWakeTime;
        
 /* Just to stop compiler warnings. */
 ( void ) pvParameters;
        
        xLastWakeTime = xTaskGetTickCount();
 for( ;; )
 {
          Task2Task_Counter++;
          STM_EVAL_LEDToggle(LED6); 

          #ifdef HIDRAW 
            for(int i=0;i<32;i++)
              HID_Buffer[i] = i;
            USBD_HID_SendReport (&USB_Device_dev, HID_Buffer, 32); 
            PrevXferDone = 0;
          #endif
              
          #ifdef VirtualComPort  
            memset(VCP_Buffer,0x00,sizeof(VCP_Buffer));
            sprintf(VCP_Buffer, "$,HelloWorld:%d\r\n", vcp_counter++); 
            USBD_VCP_SendReport(&USB_Device_dev, CDC_IN_EP, (uint8_t*)&VCP_Buffer[0], strlen(VCP_Buffer)); 
          #endif
                        
          vTaskDelayUntil( &xLastWakeTime, ( 200 / portTICK_RATE_MS ) );
 }
}

3. Test Flow:  當我們利用usb_define.h來切換VCP/HID的時候, 程式會根據切換的結果來做不同

    的Init, 因此在裝置管理員上看到的裝置也不相同.

#ifdef HIDRAW
#define USBD_VID                          0x0483
#define USBD_PID                          0x5750

#define USBD_LANGID_STRING                0x409
#define USBD_MANUFACTURER_STRING          "STMicroelectronics"

#define USBD_PRODUCT_FS_STRING            "Custome HID"

#define USBD_CONFIGURATION_FS_STRING      "HID Config"
#define USBD_INTERFACE_FS_STRING          "HID Interface"
#endif

#ifdef VirtualComPort
  #define USBD_VID                        0x0483
  #define USBD_PID                        0x5740

  /** @defgroup USB_String_Descriptors
    * @{
    */ 
  #define USBD_LANGID_STRING              0x409
  #define USBD_MANUFACTURER_STRING        "STMicroelectronics"

  #define USBD_PRODUCT_FS_STRING          "STM32 Virtual ComPort in FS Mode"

  #define USBD_CONFIGURATION_FS_STRING    "VCP Config"
  #define USBD_INTERFACE_FS_STRING        "VCP Interface"
#endif 

• HID:  假設我們要測試HID, 可以利用BusHound這套軟體來測試, 它可以針對特定裝置來側錄輸出入的log, 如下圖, 可以看到系統新增出一個HID-compliant device, 透過Hardware ID(VID/PID)可以確認這就是我們目前在使用的stm32f072 discovery board.

•  從log上看到和我們程式的結果符合, 固定每200msec輸出0x00~0x1f這32個bytes.

• VCP:

• 燒錄程式後, 先確認目前ST VCP的編號是多少? (ex: COM14)

• 可以使用Putty來觀察結果, 設定如下.

• 接著就可以看到如下圖的結果:

• Test Video:

4. Test Code Link:

    STM32F072B_Discovery_Board_FreeRTOS_USB_VCP_HID