funktioniert AUfg1

2026-03-10 17:58:59 +01:00
parent fb89de5354
commit acb872ae29
18 changed files with 1753 additions and 104 deletions
@@ -0,0 +1,205 @@
+/* ***************************************************************************************
+ *  Project:    task1 - C:GPIO
+ *  File:       task1.c
+ *
+ *  Language:   C
+ *
+ *  Hardware:   STefi Light v1.1
+ *  Processor:  STM32G431KBT6U
+ *
+ *  Author:     Manuel Lederhofer
+ *  Datum:      10.09.2021
+ *
+ *  Version:    2.1
+ *  History:
+ *      10.09.2021  ML  create project
+ *      09.03.2022  ML  port from STM32F042K6T6 to STM32G431KBT6U
+ *      18.02.2025  TK  changed projectname to "C: GPIO)
+ *
+ *  Status:     under development
+ *
+ *  Description:
+ *          Blinks the red LED of STefi Light, currently.
+ *          This file contains the main routine and the initialization.
+ *
+ *  Notes:
+ *      - MCU speed at startup is 16 MHz
+ *
+ *  Todo:
+ *      - Change the example code to match the description and requirements
+ *          of the requested application in the lab exercise guide.
+ *
+ ************************************************************************************** */
+
+/* ------------------------------------ INCLUDES -------------------------------------- */
+#include "stm32g431xx.h"
+#include "STefi-Light.h"
+
+
+/* ------------------------------------ DEFINES --------------------------------------- */
+#define LOOPS_PER_MS    1244             // NOP-loops for delay()
+#define WAITTIME        500
+#define FIRST_LED 0
+#define LAST_LED 3
+#define UP 1
+#define DOWN -1
+
+
+/* ------------------------------------ TYPE DEFINITIONS ------------------------------ */
+/* ------------------------------------ GLOBAL VARIABLES ------------------------------ */
+int state = 0;
+/* ------------------------------------ PRIVATE VARIABLES ----------------------------- */
+
+
+/* ------------------------------------ PROTOTYPES ------------------------------------ */
+static void GPIO_init(void);
+static void delay(const uint16_t ms);
+static void blink(const unint numLED);
+
+
+/* ------------------------------------ M A I N --------------------------------------- */
+int main(void)
+{
+    /* --- initialization --- */
+    __disable_irq();        // disable interrupts globally
+
+    GPIO_init();
+
+    __enable_irq();         // enable interrupts globally
+
+
+    /* --- one time tasks --- */
+
+
+    /* --- infinite processing loop --- */
+
+    while (1)
+    {
+        /* ... add your code to implement the lab assignment ... */
+        int direction;
+
+        while(1){
+            if(i == FIRST_LED){
+                direction = UP;
+            }
+            else if(i == LAST_LED){
+                direction = DOWN;
+            }
+
+            blink(i); //One full LED blink cylce
+
+            if(direction == UP){
+                i++;
+            }
+            else if(direction == DOWN){
+                i--;
+            }
+        }
+
+
+
+        switch (state) {
+            case 0:
+                GPIOA->ODR &= ~(1 << 0); // LED0 on
+                GPIOA->ODR &= ~(1 << 1);
+                GPIOA->ODR &= ~(1 << 2);
+                GPIOA->ODR &= ~(1 << 3);
+
+                state++;
+                break;
+            case 1:
+                delay(WAITTIME);            // wait
+                state++;
+                break;
+            case 2:
+                GPIOA->ODR |= (1 << 0);     // LED0 off
+                GPIOA->ODR |= (1 << 1);
+                GPIOA->ODR |= (1 << 2);
+                GPIOA->ODR |= (1 << 3);
+                delay(WAITTIME);            // wait
+                state = 0;
+                break;
+            default:
+                break;
+        }
+    }
+
+    return 1;
+}
+
+
+/* ------------------------------------ GLOBAL FUNCTIONS ------------------------------ */
+
+
+/* ------------------------------------ PRIVATE FUNCTIONS ----------------------------- */
+
+/* ------------------------------------------------------------------------------------ *\
+ * method:  static void GPIO_init(void)
+ *
+ * Initializes GPIOs on STefi Light for pins with peripherals attached.
+ *
+ * requires:    - nothing -
+ * parameters:  - none -
+ * returns:     - nothing -
+\* ------------------------------------------------------------------------------------ */
+static void GPIO_init(void)
+{
+    /* enable port clocks */
+    RCC->AHB2ENR |= RCC_AHB2ENR_GPIOAEN;    // LEDs: A
+    int i = FIRST_LED;
+
+    /* --- LEDs --- */
+    GPIOA->ODR |= MASK_LED_ALL;
+    GPIOA->MODER &= ~(3 << 0);
+    GPIOA->MODER &= ~(3 << 2);
+    GPIOA->MODER &= ~(3 << 4);
+    GPIOA->MODER &= ~(3 << 6);
+    GPIOA->MODER |= (1 << 0); // set LED pin to output
+    GPIOA->MODER |= (1 << 2);
+    GPIOA->MODER |= (1 << 4);
+    GPIOA->MODER |= (1 << 6);
+}
+
+
+/* ------------------------------------------------------------------------------------ *\
+ * method:  static void delay(const uint16_t ms)
+ *
+ * Realizes a millisecond delay by very bad busy-wait.
+ *
+ * requires:    - nothing -
+ * parameters:  ms - delay time in milliseconds
+ * returns:     - nothing -
+\* ------------------------------------------------------------------------------------ */
+static void delay(const uint16_t ms)
+{
+    for (uint16_t i = 0; i < ms; ++i)
+    {
+        for (uint16_t j = 0; j < LOOPS_PER_MS; ++j)
+        {
+            __asm("NOP");
+        }
+    }
+}
+
+static void blink(const uint numLED)
+{
+    switch (state) {
+                case 0:
+                    GPIOA->ODR &= ~(1 << numLED); // LEDX on
+                    state++;
+                    break;
+                case 1:
+                    delay(WAITTIME);            // wait
+                    state++;
+                    break;
+                case 2:
+                    GPIOA->ODR |= (1 << numLED);     // LEDX off
+                    delay(WAITTIME);            // wait
+                    state = default;
+                    break;
+                default:
+                    break;
+}
+
+
+/* ************************************ E O F ***************************************** */