restructuring

F1:F103/SevenCDCs/main.c

@@ -0,0 +1,103 @@
+/*
+ * main.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 "hardware.h"
+#include "proto.h"
+#include "usb.h"
+#include "usb_lib.h"
+
+volatile uint32_t Tms = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+#define USBBUF 63
+// usb getline
+static char *get_USB(int idx){
+    static char tmpbuf[8][USBBUF+1];
+    static char *curptr[8] = {tmpbuf[0], tmpbuf[1], tmpbuf[2], tmpbuf[3], tmpbuf[4], tmpbuf[5], tmpbuf[6], tmpbuf[7]};
+    static int rest[8] = {USBBUF, USBBUF, USBBUF, USBBUF, USBBUF, USBBUF, USBBUF, USBBUF};
+    uint8_t x = USB_receive(idx, (uint8_t*)curptr[idx]);
+    if(!x) return NULL;
+    curptr[idx][x] = 0;
+    if(x == 1 && *curptr[idx] == 0x7f){ // backspace
+        if(curptr[idx] > tmpbuf[idx]){
+            --curptr[idx];
+            USND(idx, "\b \b");
+        }
+        return NULL;
+    }
+    USB_sendstr(idx, curptr[idx]); // echo
+    if(curptr[idx][x-1] == '\n'){ // || curptr[x-1] == '\r'){
+        curptr[idx] = tmpbuf[idx];
+        rest[idx] = USBBUF;
+        // omit empty lines
+        if(tmpbuf[idx][0] == '\n') return NULL;
+        // and wrong empty lines
+        if(tmpbuf[idx][0] == '\r' && tmpbuf[idx][1] == '\n') return NULL;
+        return tmpbuf[idx];
+    }
+    curptr[idx] += x; rest[idx] -= x;
+    if(rest[idx] <= 0){ // buffer overflow
+        curptr[idx] = tmpbuf[idx];
+        rest[idx] = USBBUF;
+    }
+    return NULL;
+}
+
+int main(void){
+    uint32_t lastT = 0;
+    sysreset();
+    StartHSE();
+    SysTick_Config(72000);
+    hw_setup();
+    USBPU_OFF();
+   /*if(RCC->CSR & RCC_CSR_IWDGRSTF){ // watchdog reset occured
+        SEND("WDGRESET=1"); newline();
+    }
+    if(RCC->CSR & RCC_CSR_SFTRSTF){ // software reset occured
+        SEND("SOFTRESET=1"); newline();
+    }*/
+    RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
+
+    USB_setup();
+    iwdg_setup();
+    USBPU_ON();
+    while(1){
+        IWDG->KR = IWDG_REFRESH; // refresh watchdog
+        if(Tms - lastT > 499){
+            LED_blink(LED0);
+            lastT = Tms;
+        }
+        usb_proc();
+        for(uint8_t idx = 1; idx < 8; ++idx){
+            char *txt = get_USB(idx);
+            if(txt){
+                IWDG->KR = IWDG_REFRESH;
+                cmd_parser(txt);
+            }
+        }
+    }
+    return 0;
+}
+