Diff: main.cpp

Revision:

1:73d739c64e4c

Parent:

0:1f39a86b8daa

Child:

2:87dc86a7288b

--- a/main.cpp	Tue Mar 10 21:22:07 2015 +0000
+++ b/main.cpp	Sat Mar 21 11:21:32 2015 +0000
@@ -1,33 +1,109 @@
+/**********************************************************************************
+* @file    main.cpp
+* @author  Name
+* @version V0.1
+* @date    09-March-2015
+* @brief   LEDs blinking with ticker.
+*          With push button pressed, LEDs turn on.
+***********************************************************************************/
+
+/**********************************************************************************/
+/*   Table of used pins on STM32F3 Discovery kit                                  */
+/**********************************************************************************/
+/*  Discovery pin  | ST Nucleo F303RE pin  |      peripheral                      */
+/*      PA_0       |         PC_13         |      User button                     */
+/*  PE_8 to PE_15  |         PA_5          |      LEDs                             */
+/**********************************************************************************/
+
+/* Includes ----------------------------------------------------------------------*/
+
 #include "mbed.h"
-#include "stm32f3xx_hal_gpio.h"
+#include "stm32f3xx_hal_gpio.h" //library necessary to blink LEDs on STM32F3 discovery
 
-//DigitalOut  my_led(LED1);
-DigitalOut  out_1(D7);
-Ticker toggle_ticker;
+/* Defines -----------------------------------------------------------------------*/
+
+// In some mbed libraries are not included these definines
+
+//#define GPIOE_BASE          (AHB2PERIPH_BASE + 0x1000)
+//#define GPIOE               ((GPIO_TypeDef *) GPIOE_BASE)
+//#define RCC_AHBENR_GPIOEEN ((uint32_t)0x00200000)
+//#define RCC_AHBPeriph_GPIOE RCC_AHBENR_GPIOEEN
+
+
+//mbed - initialization of peripherals
+InterruptIn button(PA_0);       // inicialize button on STM32F3 discovery
+Ticker toggle_ticker;           // inicialize ticker
+
+
+/* Functions----------------------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name  : toggle.
+* Description    : Blinks whit 8 LEDs if ticker interval reached.
+* Input          : None.
+* Output         : Blinks whit 8 LEDs.
+* Return         : None.
+*******************************************************************************/
 
 void toggle()
 {
-    HAL_GPIO_TogglePin(GPIOE,GPIO_PIN_14 | GPIO_PIN_15 | GPIO_PIN_13 | GPIO_PIN_12 | GPIO_PIN_11 | GPIO_PIN_10 | GPIO_PIN_9 | GPIO_PIN_8);
-    //my_led = !my_led;
+    // Toggle pins PE_15 to PE_8 , where LEDs are attached to
+    HAL_GPIO_TogglePin(GPIOE,GPIO_PIN_15 | GPIO_PIN_14 | GPIO_PIN_13 | GPIO_PIN_12 | GPIO_PIN_11 | GPIO_PIN_10 | GPIO_PIN_9 | GPIO_PIN_8);
 }
 
+/*******************************************************************************
+* Function Name  : pressed.
+* Description    : Set LEDs on if someone pressed the button.
+* Input          : None.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void pressed()
+{
+    // Switch pins PE_15 to PE_8  to log. 1 , where LEDs are attached to
+    HAL_GPIO_WritePin(GPIOE , GPIO_PIN_15 | GPIO_PIN_14 | GPIO_PIN_13 | GPIO_PIN_12 | GPIO_PIN_11 | GPIO_PIN_10 | GPIO_PIN_9 | GPIO_PIN_8 , GPIO_PIN_SET);
+}
+
+/***********************************************************************************
+* Function Name  : main.
+* Description    : Main routine.
+* Input          : None.
+* Output         : None.
+* Return         : None.
+***********************************************************************************/
 
 int main()
 {
     //inicialize power (clock source) to port E (GPIOE)
     __GPIOE_CLK_ENABLE();
+    //  RCC->AHBENR |= RCC_AHBPeriph_GPIOE; // if __GPIOE_CLK_ENABLE(); is not defined
 
     //inicialize pins
+    // atructure to set GPIO
     GPIO_InitTypeDef        GPIO_InitStruct;
+    //Specifies the operating mode for the selected pins.
+    // Output Push Pull Mode 
     GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+    //Specifies the Pull-up or Pull-Down activation for the selected pins.
+    //Pull-up activation
     GPIO_InitStruct.Pull = GPIO_PULLUP;
+    //Specifies the speed for the selected pins.
+    //High speed
     GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-    GPIO_InitStruct.Pin = GPIO_PIN_14 | GPIO_PIN_15 | GPIO_PIN_13 | GPIO_PIN_12 | GPIO_PIN_11 | GPIO_PIN_10 | GPIO_PIN_9 | GPIO_PIN_8;
+    //Specifies the GPIO pins to be configured.
+    //Pins 15 to 8
+    GPIO_InitStruct.Pin = GPIO_PIN_15 | GPIO_PIN_14 | GPIO_PIN_13 | GPIO_PIN_12 | GPIO_PIN_11 | GPIO_PIN_10 | GPIO_PIN_9 | GPIO_PIN_8;
+    
+    //Inicialize pins PE_15 to PE_8
     HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
 
-    // Init the ticker with the address of the function (toggle) to be attached and the interval (100 ms)
+    // button was pressed, call function pressed
+    button.fall(&pressed);
 
-    toggle_ticker.attach(&toggle, 0.1);
+    // Init the ticker with the address of the function (toggle) to be attached and the interval (1 s)
+    toggle_ticker.attach(&toggle, 1);
+
+    // infinity loop
     while (1) {
     }
 }