restructuring

F1:F103/ws2815/main.c

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+/*
+ * This file is part of the ws2815 project.
+ * Copyright 2020 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 "hardware.h"
+#include "proto.h"
+#include "usb.h"
+#include "usb_lib.h"
+#include "ws2815.h"
+#include "hsv.h"
+
+volatile uint32_t Tms = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+// usb getline
+char *get_USB(){
+    static char tmpbuf[512], *curptr = tmpbuf;
+    static int rest = 511;
+    uint8_t x = USB_receive((uint8_t*)curptr);
+    curptr[x] = 0;
+    if(!x) return NULL;
+    if(curptr[x-1] == '\n'){
+        curptr = tmpbuf;
+        rest = 511;
+        return tmpbuf;
+    }
+    curptr += x; rest -= x;
+    if(rest <= 0){ // buffer overflow
+        curptr = tmpbuf;
+        rest = 511;
+    }
+    return NULL;
+}
+
+static uint16_t Harray[LEDS_NUM]; // Hue
+
+static void rstarray(){
+    rstcounter = 0;
+    for(uint16_t i = 0; i < LEDS_NUM; ++i){
+        Harray[i] = i;
+        ws2815setpix(i, hsv2grb(Harray[i], S, V));
+    }
+    ws2815start();
+}
+
+int main(void){
+    uint32_t lastT = 0, lastTc = 0;
+    sysreset();
+    StartHSE();
+    hw_setup();
+    SysTick_Config(72000);
+
+    RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
+
+    USBPU_OFF();
+    USB_setup();
+    iwdg_setup();
+    USBPU_ON();
+
+    rstarray();
+    while (1){
+        IWDG->KR = IWDG_REFRESH; // refresh watchdog
+        if(Tms - lastT > 499){
+            LED_blink(LED0);
+            lastT = Tms;
+        }
+        if(Tms - lastTc > 9){
+            lastTc = Tms;
+            if(rstcounter){
+                rstarray();
+            }else if(!pause){
+                for(uint16_t i = 0; i < LEDS_NUM; ++i){
+                    if(++Harray[i] > 359) Harray[i] = 0;
+                    uint16_t H = Harray[i];
+                       ws2815setpix(i, hsv2grb(H, S, V));
+                }
+                ws2815start();
+            }
+        }
+        usb_proc();
+        char *txt, *ans;
+        if((txt = get_USB())){
+            IWDG->KR = IWDG_REFRESH;
+            ans = (char*)parse_cmd(txt);
+            if(ans){
+                uint16_t l = 0; char *p = ans;
+                while(*p++) l++;
+                USB_send((uint8_t*)ans, l);
+            }
+        }
+    }
+    return 0;
+}