fixed trouble with sybolic links

F1:F103/Tetris/main.c

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-/home/eddy/Yandex.Disk/Projects/mytakepic/.hg/wcache/checklink-target

F1:F103/Tetris/main.c

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+/*
+ * This file is part of the TETRIS project.
+ * Copyright 2021 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 "adcrandom.h"
+#include "arkanoid.h"
+#include "balls.h"
+#include "buttons.h"
+#include "fonts.h"
+#include "hardware.h"
+#include "menu.h"
+#include "proto.h"
+#include "screen.h"
+#include "snake.h"
+#include "tetris.h"
+#include "usb.h"
+#include "usb_lib.h"
+
+// timeout for autosleep (30s)
+#define AUTOSLEEP_TMOUT     (30000)
+
+volatile uint32_t Tms = 0;
+uint8_t balls = 0;
+
+enum{
+    STATE_MENU,
+    STATE_SNAKE,
+    STATE_TETRIS,
+    STATE_ARKANOID,
+    STATE_SLEEP,
+    STATE_GAMEOVER
+} curstate = STATE_SLEEP;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+#define USBBUFSZ    (127)
+// usb getline
+static char *get_USB(){
+    static char tmpbuf[USBBUFSZ+1], *curptr = tmpbuf;
+    static int rest = USBBUFSZ;
+    int x = USB_receive(curptr);
+    curptr[x] = 0;
+    if(!x) return NULL;
+    if(curptr[x-1] == '\n'){
+        curptr = tmpbuf;
+        rest = USBBUFSZ;
+        return tmpbuf;
+    }
+    curptr += x; rest -= x;
+    if(rest <= 0){ // buffer overflow
+        curptr = tmpbuf;
+        rest = USBBUFSZ;
+        USB_send("USB buffer overflow\n");
+    }
+    return NULL;
+}
+
+static void process_menu(){
+    switch(menu_activated()){
+        case MENU_SLEEP:
+            USB_send("Select 'Sleep'\n");
+            ScreenOFF();
+            curstate = STATE_SLEEP;
+        break;
+        case MENU_BALLS:
+            USB_send("Select 'Balls'\n");
+            if(balls){
+                balls = 0;
+            }else{
+                curstate = STATE_SLEEP;
+                balls_init();
+                balls = 1;
+            }
+        break;
+        case MENU_SNAKE:
+            USB_send("Select 'Snake'\n");
+            snake_init();
+            curstate = STATE_SNAKE;
+        break;
+        case MENU_TETRIS:
+            USB_send("Select 'Tetris'\n");
+            tetris_init();
+            curstate = STATE_TETRIS;
+        break;
+        case MENU_ARKANOID:
+            USB_send("Select 'Arkanoid'\n");
+            arkanoid_init();
+            curstate = STATE_ARKANOID;
+        default:
+        break;
+    }
+}
+
+static void gotomenu(){
+    curstate = STATE_MENU;
+    clear_events();
+    show_menu();
+}
+
+int main(void){
+    uint32_t lastT = 0;
+    sysreset();
+    StartHSE();
+    SysTick_Config(72000);
+    RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
+
+    hw_setup();
+    USBPU_OFF();
+    adc_setup();
+    USB_setup();
+    //iwdg_setup();
+    USBPU_ON();
+
+    keyevent evt;
+    while(1){
+        if(Tms - lastT > 499){
+            LED_blink(LED0);
+            lastT = Tms;
+        }
+        IWDG->KR = IWDG_REFRESH;
+        if(balls) process_balls();
+        process_keys();
+        switch(curstate){
+            case STATE_SLEEP:
+                if(keystate(KEY_M, &evt) && evt == EVT_RELEASE){
+                    USB_send("Activate menu\n");
+                    gotomenu();
+                }
+            break;
+            case STATE_MENU:
+                process_menu();
+                if(Tms - lastUnsleep > AUTOSLEEP_TMOUT){
+                    USB_send("Autosleep\n");
+                    ScreenOFF();
+                    curstate = STATE_SLEEP;
+                }
+            break;
+            case STATE_SNAKE:
+                if(!snake_proces()){
+                    show_gameover();
+                    curstate = STATE_GAMEOVER;
+                }
+            break;
+            case STATE_TETRIS:
+                if(!tetris_process()){
+                    show_gameover();
+                    curstate = STATE_GAMEOVER;
+                }
+            break;
+            case STATE_ARKANOID:
+                if(!arkanoid_process()){
+                    show_gameover();
+                    curstate = STATE_GAMEOVER;
+                }
+            break;
+            case STATE_GAMEOVER: // show gameover screen
+                if(keystate(KEY_M, &evt) && evt == EVT_RELEASE){
+                    gotomenu();
+                }else if(Tms - lastUnsleep > AUTOSLEEP_TMOUT){
+                    USB_send("Autosleep\n");
+                    ScreenOFF();
+                    curstate = STATE_SLEEP;
+                }
+            break;
+        }
+
+        usb_proc();
+        char *txt; const char *ans;
+        if((txt = get_USB())){
+            ans = parse_cmd(txt);
+            if(ans) USB_send(ans);
+        }
+    }
+    return 0;
+}
+