copy InterfaceBoard as 7CDCs template

F3:F303/Seven_CDCs/proto.c

@@ -0,0 +1,136 @@
+/*
+ * This file is part of the multiiface project.
+ * Copyright 2026 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 <stm32f3.h>
+#include <string.h>
+
+#include "flash.h"
+#include "strfunc.h"
+#include "usb_dev.h"
+#include "version.inc"
+
+// all functions of this file could be run only in configuration mode
+
+static const char *const sOKn = "OK\n", *const sERRn = "ERR\n";
+
+//#define LOCBUFFSZ       (32)
+// local buffer for I2C data to send
+//static uint8_t locBuffer[LOCBUFFSZ];
+extern volatile uint32_t Tms;
+
+const char *helpstring =
+        "https://github.com/eddyem/stm32samples/tree/master/F3:F303/InterfaceBoard build#" BUILD_NUMBER " @ " BUILD_DATE "\n"
+        "d - dump flash\n"
+        "ix - rename interface number x (0..6)\n"
+        "Ex - erase full storage (witout x) or only page x\n"
+        "F - reinit configurations from flash\n"
+        "R - soft reset\n"
+        "S - store new parameters into flash\n"
+        "T - print current Tms\n"
+;
+
+static void dumpflash(){
+    CFGWR("userconf_sz="); CFGWR(u2str(the_conf.userconf_sz));
+    CFGWR("\ncurrentconfidx="); CFGWRn(i2str(currentconfidx));
+    for(int i = 0; i < InterfacesAmount; ++i){
+        CFGWR("interface"); USB_putbyte(ICFG, '0' + i);
+        USB_putbyte(ICFG, '=');
+        int l = the_conf.iIlengths[i] / 2;
+        char *ptr = (char*) the_conf.iInterface[i];
+        for(int j = 0; j < l; ++j){
+            USB_putbyte(ICFG, *ptr);
+            ptr += 2;
+        }
+        CFGn();
+    }
+}
+
+static void setiface(const char *str){
+    if(!str || !*str) goto err;
+    uint32_t N;
+    const char *nxt = getnum(str, &N);
+    if(!nxt || nxt == str || N >= InterfacesAmount) goto err;
+    nxt = strchr(nxt, '=');
+    if(!nxt || !*(++nxt)) goto err;
+    nxt = omit_spaces(nxt);
+    if(!nxt || !*nxt) goto err;
+    int l = strlen(nxt);
+    if(l > MAX_IINTERFACE_SZ) goto err;
+    the_conf.iIlengths[N] = (uint8_t) l * 2;
+    char *ptr = (char*)the_conf.iInterface[N];
+    for(int i = 0; i < l; ++i){
+        *ptr++ = *nxt++;
+        *ptr++ = 0;
+    }
+    CFGWR(sOKn);
+    return;
+err:
+    CFGWR(sERRn);
+}
+
+static const char* erpg(const char *str){
+    uint32_t N;
+    if(str == getnum(str, &N)) return sERRn;
+    if(erase_storage(N)) return sERRn;
+    return sOKn;
+}
+
+const char *parse_cmd(const char *buf){
+    if(!buf || !*buf) return NULL;
+    if(strlen(buf) > 1){
+        // "long" commands
+        char c = *buf++;
+        switch(c){
+            case 'E':
+                return erpg(buf);
+            case 'i':
+                setiface(buf);
+                return NULL;
+            break;
+            default:
+                return buf-1; // echo wrong data
+        }
+    }
+    // "short" commands
+    switch(*buf){
+        case 'd':
+            dumpflash();
+        break;
+        case 'E':
+            if(erase_storage(-1)) return sERRn;
+            return sOKn;
+        break;
+        case 'F':
+            flashstorage_init();
+            return sOKn;
+        case 'R':
+            NVIC_SystemReset();
+            return NULL;
+        case 'S':
+            if(store_userconf()) return sERRn;
+            return sOKn;
+        case 'T':
+            CFGWR("T=");
+            CFGWRn(u2str(Tms));
+            break;
+        default: // help
+            CFGWR(helpstring);
+        break;
+    }
+    return NULL;
+}