copy InterfaceBoard as 7CDCs template

F3:F303/Seven_CDCs/strfunc.c

@@ -1,6 +1,6 @@
 /*
- * This file is part of the 7CDCs project.
- * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ * This file is part of the multiiface project.
+ * Copyright 2025 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
@@ -16,17 +16,15 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <math.h>
 #include <stm32f3.h>
-#include <string.h>
-#include "usb.h"
+
 /**
  * @brief hexdump - dump hex array by 16 bytes in string
- * @param ifno - USB interface number
+ * @param sendfun - function to send data
  * @param arr - array to dump
  * @param len - length of `arr`
  */
-void hexdump(int ifno, uint8_t *arr, uint16_t len){
+void hexdump(int (*sendfun)(const char *s), uint8_t *arr, uint16_t len){
     char buf[52], *bptr = buf;
     for(uint16_t l = 0; l < len; ++l, ++arr){
         for(int16_t j = 1; j > -1; --j){
@@ -37,14 +35,14 @@ void hexdump(int ifno, uint8_t *arr, uint16_t len){
         if(l % 16 == 15){
             *bptr++ = '\n';
             *bptr = 0;
-            USB_sendstr(ifno, buf);
+            sendfun(buf);
             bptr = buf;
         }else *bptr++ = ' ';
     }
     if(bptr != buf){
         *bptr++ = '\n';
         *bptr = 0;
-        USB_sendstr(ifno, buf);
+        sendfun(buf);
     }
 }
 
@@ -267,85 +265,3 @@ const char *getint(const char *txt, int32_t *I){
     *I = sign * (int32_t)U;
     return nxt;
 }
-
-int mystrlen(const char *txt){
-    if(!txt) return 0;
-    int r = 0;
-    while(*txt++) ++r;
-    return r;
-}
-
-/*
-void mymemcpy(char *dest, const char *src, int len){
-    if(len < 1) return;
-    while(len--) *dest++ = *src++;
-}
-*/
-
-// be careful: if pow10 would be bigger you should change str[] size!
-static const float pwr10[] = {1.f, 10.f, 100.f, 1000.f, 10000.f};
-static const float rounds[] = {0.5f, 0.05f, 0.005f, 0.0005f, 0.00005f};
-#define P10L  (sizeof(pwr10)/sizeof(uint32_t) - 1)
-char * float2str(float x, uint8_t prec){
-    static char str[16] = {0}; // -117.5494E-36\0 - 14 symbols max!
-    if(prec > P10L) prec = P10L;
-    if(isnan(x)){ memcpy(str, "NAN", 4); return str;}
-    else{
-        int i = isinf(x);
-        if(i){memcpy(str, "-INF", 5); if(i == 1) return str+1; else return str;}
-    }
-    char *s = str + 14; // go to end of buffer
-    uint8_t minus = 0;
-    if(x < 0){
-        x = -x;
-        minus = 1;
-    }
-    int pow = 0; // xxxEpow
-    // now convert float to 1.xxxE3y
-    while(x > 1000.f){
-        x /= 1000.f;
-        pow += 3;
-    }
-    if(x > 0.) while(x < 1.){
-        x *= 1000.f;
-        pow -= 3;
-    }
-    // print Eyy
-    if(pow){
-        uint8_t m = 0;
-        if(pow < 0){pow = -pow; m = 1;}
-        while(pow){
-            register int p10 = pow/10;
-            *s-- = '0' + (pow - 10*p10);
-            pow = p10;
-        }
-        if(m) *s-- = '-';
-        *s-- = 'E';
-    }
-    // now our number is in [1, 1000]
-    uint32_t units;
-    if(prec){
-        units = (uint32_t) x;
-        uint32_t decimals = (uint32_t)((x-units+rounds[prec])*pwr10[prec]);
-        // print decimals
-        while(prec){
-            register int d10 = decimals / 10;
-            *s-- = '0' + (decimals - 10*d10);
-            decimals = d10;
-            --prec;
-        }
-        // decimal point
-        *s-- = '.';
-    }else{ // without decimal part
-        units = (uint32_t) (x + 0.5);
-    }
-    // print main units
-    if(units == 0) *s-- = '0';
-    else while(units){
-        register uint32_t u10 = units / 10;
-        *s-- = '0' + (units - 10*u10);
-        units = u10;
-    }
-    if(minus) *s-- = '-';
-    return s+1;
-}