开发者成长激励计划-激光测距仪Demo

 static eBtnLevel prvButtonReadpin( Button_t* btn )
 {
     if( btn == &xButton0 )
     {
         return ( eBtnLevel )BUTTON0_STATUS();
     }
     if( btn == &xButton1 )
     {
         return ( eBtnLevel )BUTTON1_STATUS();
     }
     if( btn == &xButton2 )
     {
         return ( eBtnLevel )BUTTON2_STATUS();
     }
     return eLevelHigh;
 }
 ​
 static void prvButtonEvent( Button_t* btn )
 {
     eBtnPressEvent event = btn->event;
     if( btn == &xButton0 )
     {
         LOG_RAW( "Button0 %u.\r\n", event );
         return;
     }
     if( btn == &xButton1 )
     {
         LOG_RAW( "Button1 %u.\r\n", event );
         return;
     }
     if( btn == &xButton2 )
     {
         LOG_RAW( "Button2 %u.\r\n", event );
         return;
     }
     LOG_RAW( "ButtonX %u.\r\n", event );
 }
 ​
 __API__ void vBspButtonConfig( void )
 {
     GPIO_InitTypeDef  GPIO_InitStructure;
     RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );
     GPIO_ResetBits( GPIOA, BUTTON0_PIN | BUTTON1_PIN | BUTTON2_PIN );
     GPIO_StructInit( &GPIO_InitStructure );
     GPIO_InitStructure.GPIO_Pin =  BUTTON0_PIN | BUTTON1_PIN | BUTTON2_PIN;
     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
     GPIO_Init( GPIOA, &GPIO_InitStructure );
     //Software
     vBtnRegister( &xButton0, prvButtonReadpin, eLevelLow );
     vBtnAttch( &xButton0, SINGLE_CLICK, prvButtonEvent );
     // vBtnAttch( &xButton0, PRESS_DOWN, prvButtonEvent );
     // vBtnAttch( &xButton0, PRESS_UP, prvButtonEvent );
     xBtnStart( &xButton0 );
     vBtnRegister( &xButton1, prvButtonReadpin, eLevelLow );
     vBtnAttch( &xButton1, SINGLE_CLICK, prvButtonEvent );
     // vBtnAttch( &xButton1, PRESS_DOWN, prvButtonEvent );
     // vBtnAttch( &xButton1, PRESS_UP, prvButtonEvent );
     xBtnStart( &xButton1 );
     vBtnRegister( &xButton2, prvButtonReadpin, eLevelLow );
     vBtnAttch( &xButton2, SINGLE_CLICK, prvButtonEvent );
     // vBtnAttch( &xButton2, PRESS_DOWN, prvButtonEvent );
     // vBtnAttch( &xButton2, PRESS_UP, prvButtonEvent );
     xBtnStart( &xButton2 );
     //
     tos_timer_create( &xButtonTimer, 5, 5, vBtnTimerHook, K_NULL, TOS_OPT_TIMER_PERIODIC );
     tos_timer_start( &xButtonTimer );
 }

 void task2_entry( void* arg )
 {
     LCD_Init();
     LCD_Fill( 0, 0, LCD_W, LCD_H, BLACK );
     LCD_ShowString( 30, 0, "TencentOS_Tiny", BLUE, BLACK, 24, 0 );
     LCD_ShowString( 20, 28, "RangeFinder", CYAN, BLACK, 32, 0 );
     while( 1 )
     {
         tos_task_delay( 1000 );
         LCD_ShowIntNum( 20, 70, _num++, 8, LBBLUE, BLACK, 32 );
     }
 }