add blink for G070 (NOT TESTED!)

2026-02-28 03:44:30 +03:00 · 2022-12-22 21:14:59 +03:00
parent 59fb731725
commit c152315922
42 changed files with 120939 additions and 0 deletions
--- a/G0:G070/blink/systick_blink.c
+++ b/G0:G070/blink/systick_blink.c
@@ -0,0 +1,77 @@
+/*
+ * systick_blink.c
+ *
+ * Copyright 2017 Edward V. Emelianoff <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 "stm32g0.h"
+
+// KEY (intpullup->0) - PC0
+// LED - PC7
+
+static volatile uint32_t blink_ctr = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++blink_ctr;
+}
+
+/*
+ * Set up timer to fire every x milliseconds
+ */
+static void systick_setup(uint32_t xms){ // xms < 1864!!!
+    static uint32_t curms = 0;
+    if(curms == xms) return;
+    // 9MHz - HCLK/8
+    // this function also clears counter so it starts right away
+    SysTick_Config(9000 * xms); // arg should be < 0xffffff, so ms should be < 1864
+    curms = xms;
+}
+
+
+static void gpio_setup(void){
+    RCC->IOPENR = RCC_IOPENR_GPIOCEN; // enable PC
+    // set PC7 as opendrain output, PC0 is pullup input
+    GPIOC->MODER = GPIO_MODER_MODER7_O;
+    GPIOC->PUPDR = GPIO_PUPDR_PUPD0;
+    GPIOC->OTYPER = GPIO_OTYPER_OT7;
+}
+
+static const uint32_t L[] = {125,100,125,100,125,200, 350,100,350,100,350,200, 125,100,125,100,125, 1000};
+
+int main(void){
+    StartHSE();
+    //StartHSI48();
+    gpio_setup();
+    /* 500ms ticks =>  1000ms period => 1Hz blinks */
+    systick_setup(100);
+    /* Do nothing in main loop */
+    while (1){
+        if(pin_read(GPIOC, 1<<7)){ // key not pressed - 'sos'
+            uint32_t T = blink_ctr % 18;
+            systick_setup(L[T]);
+            if(T & 1) pin_clear(GPIOC, 1<<7);
+            else pin_set(GPIOC, 1<<7);
+        }else{ // key pressed - blink with period of 1s
+            systick_setup(500);
+            if(blink_ctr & 1) pin_clear(GPIOC, 1<<7);
+            else pin_set(GPIOC, 1<<7);
+
+        }
+    }
+}