restructuring

2026-02-28 11:54:30 +03:00 · 2022-03-10 11:04:14 +03:00
parent 29560b7c0c
commit 733dbd75d2
1758 changed files with 14 additions and 26855 deletions
--- a/F1:F103/led_blink/main.c
+++ b/F1:F103/led_blink/main.c
@@ -0,0 +1,89 @@
+/*
+ * main.c
+ *
+ * Copyright 2018 Edward V. Emelianov <eddy@sao.ru, 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include "stm32f1.h"
+
+static volatile uint32_t blink_ctr = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++blink_ctr;
+}
+
+// SysTick is 24 bit counter, so 16777215 - max value!!!
+// After HSE is ON it works @72MHz (or remove SysTick_CTRL_CLKSOURCE_Msk @ SysTick_Config for 8MHz)
+static void systick_setup(uint32_t xms){
+    static uint32_t curms = 0;
+    if(curms == xms) return;
+    // this function also clears counter so it starts right away
+    SysTick_Config(72000 * xms);
+    curms = xms;
+}
+
+static const uint16_t L[] = {125,100,125,100,125,200, 60,100,60,100,60,200, 125,100,125,100,125, 230};
+
+static void gpio_setup(void){
+    /* Enable clocks to the GPIO subsystems (A&B) */
+    RCC->APB2ENR |= RCC_APB2ENR_IOPBEN | RCC_APB2ENR_IOPCEN;
+    /* Set leds (PB8/PB9) as opendrain output */
+    GPIOB->CRH = CRH(8, CNF_ODOUTPUT|MODE_SLOW) | CRH(9, CNF_ODOUTPUT|MODE_SLOW);
+    /* Set buttons (PC0/1) as inputs with weak pullups */
+    GPIOC->ODR = 3; // pullups for PC0/1
+    GPIOC->CRL = CRL(0, CNF_PUDINPUT|MODE_INPUT) | CRL(1, CNF_PUDINPUT|MODE_INPUT);
+}
+
+int main(){
+    sysreset();
+    StartHSE();
+    gpio_setup();
+    systick_setup(100);
+    uint32_t oldctr = 0xff;
+    pin_clear(GPIOB, 3<<8);
+    /* Do nothing in main loop */
+    while (1){
+        if(pin_read(GPIOC, 1) && pin_read(GPIOC, 2)){ // no buttons present - morze @ LED1 (PB9)
+            if(oldctr != blink_ctr){
+                uint32_t T = blink_ctr % 18;
+                systick_setup(L[T]);
+                if(T & 1) pin_set(GPIOB, 1<<9);
+                else pin_clear(GPIOB, 1<<9);
+                oldctr = blink_ctr;
+            }
+        }else{ // button pressed: turn ON given LED
+            if(pin_read(GPIOC, 1) == 0){ // PC0 pressed (button S2)
+                systick_setup(5);
+                if(blink_ctr - oldctr > 499){
+                    pin_toggle(GPIOB, 1<<9);
+                    oldctr = blink_ctr;
+                }
+            }else pin_set(GPIOB, 1<<9);
+            if(pin_read(GPIOC, 2) == 0){ // PC1 pressed (button S3)
+                systick_setup(1);
+                if(blink_ctr - oldctr > 499){
+                    pin_toggle(GPIOB, 1<<8);
+                    oldctr = blink_ctr;
+                }
+            }else pin_set(GPIOB, 1<<8);
+
+        }
+    }
+}
+