add G431-blink

2026-08-15 12:39:34 +03:00 · 2026-06-24 22:56:04 +03:00
parent 1f79a43326
commit 852d34204f
52 changed files with 187042 additions and 0 deletions
--- a/G4:G431/blink/systick_blink.c
+++ b/G4:G431/blink/systick_blink.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the blink project.
+ * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "stm32g4.h"
+
+// KEY (intpullup->0) - PC13
+// LED - PC6
+#define KEY_PORT    GPIOC
+#define KEY_PIN     (1<<13)
+#define LED_PORT    GPIOC
+#define LED_PIN     (1<<6)
+#define KEY_PRESSED() (pin_read(KEY_PORT, KEY_PIN) == 1)
+#define LED_ON()    do{pin_set(LED_PORT, LED_PIN);}while(0)
+#define LED_OFF()   do{pin_clear(LED_PORT, LED_PIN);}while(0)
+#define LED_TOGG()  do{pin_toggle(LED_PORT, LED_PIN);}while(0)
+
+static volatile uint32_t Tms = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+static void gpio_setup(void){
+    RCC->AHB2ENR = RCC_AHB2ENR_GPIOCEN; // enable PC
+    // set PC6 as push-pull output, PC13 is pulldown input, other as default (AIN)
+    GPIOC->MODER = (0xffffffff & ~(GPIO_MODER_MODE6 | GPIO_MODER_MODE13)) | MODER_O(6) | MODER_I(13);
+    GPIOC->PUPDR = PUPD_PD(13); // pulldown
+    GPIOC->OTYPER = OTYPER_PP(6); // push-pull (default)
+    // count milliseconds
+    SysTick_Config(SysFreq / 1000); // arg should be < 0xffffff
+}
+
+static const uint32_t L[] = {300, 125,100,125,100,125,200, 350,100,350,100,350,200, 125,100,125,100,125, 1000};
+
+int main(void){
+    StartHSE();
+    gpio_setup();
+    uint32_t idx = 0, Told = 0;
+    int pressed = 0;
+    /* Do nothing in main loop */
+    while (1){
+        if(KEY_PRESSED()){ // key not pressed - 'sos'
+            if(idx & 1) LED_ON();
+            else LED_OFF();
+            while(Tms - Told < L[idx]);
+            if(++idx == 19) idx = 0;
+        }else{ // key pressed - blink with period of 1s
+            if(pressed){
+                idx = 0;
+                pressed = 0;
+            }
+            LED_TOGG();
+            while(Tms - Told < 500);
+        }
+        Told = Tms;
+    }
+}