diff --git a/F3:F303/Multistepper/Readme.md b/F3:F303/Multistepper/Readme.md
index 82939a6..f7789f9 100644
--- a/F3:F303/Multistepper/Readme.md
+++ b/F3:F303/Multistepper/Readme.md
@@ -390,6 +390,8 @@ Dump command codes. Returns all list of CAN bus command codes.
 ###  dumpconf
 Dump current configuration. Returns a lot of information both common (like CAN bus speed, ID and so on) and
 for each motor driver. You can call independeng getters for each of this parameter.
+###  dumpmotN
+Dump configuration of Nth motor only.
 ### dumpmotflags 
 Dump motor flags' bits (for `motflagsN`) and reaction to limit switches (`eswreact`) values:
 
diff --git a/F3:F303/Multistepper/can.h b/F3:F303/Multistepper/can.h
index fa09df4..feb3556 100644
--- a/F3:F303/Multistepper/can.h
+++ b/F3:F303/Multistepper/can.h
@@ -20,8 +20,8 @@
 
 #include <stdint.h>
 
-// amount of filter banks in STM32F0
-#define STM32F0FBANKNO      28
+// amount of filter banks in STM32F
+#define STM32FBANKNO        28
 // flood period in milliseconds
 #define FLOOD_PERIOD_MS     5
 
diff --git a/F3:F303/Multistepper/flash.c b/F3:F303/Multistepper/flash.c
index 0553832..f6afdf3 100644
--- a/F3:F303/Multistepper/flash.c
+++ b/F3:F303/Multistepper/flash.c
@@ -200,6 +200,33 @@ int erase_storage(int npage){
     return ret;
 }
 
+int fn_dumpmot(uint32_t _U_ hash, char _U_ *args){ // "dumpmot" (1224122507)
+    if(!args || !*args) return RET_WRONGCMD;
+    uint32_t i;
+    const char *eq = getnum(args, &i);
+    if(eq == args || i > STP_STATE_AMOUNT) return RET_WRONGCMD;
+    char cur = '0' + i;
+#define PROPNAME(nm)    do{newline(); USB_sendstr(nm); USB_putbyte(cur); USB_putbyte('=');}while(0)
+    USB_sendstr("microsteps"); USB_putbyte(cur); USB_putbyte('=');
+    printu(the_conf.microsteps[i]);
+    PROPNAME("accel");
+    printu(the_conf.accel[i]);
+    PROPNAME("maxspeed");
+    printu(the_conf.maxspd[i]);
+    PROPNAME("minspeed");
+    printu(the_conf.minspd[i]);
+    PROPNAME("maxsteps");
+    printu(the_conf.maxsteps[i]);
+    PROPNAME("motcurrent");
+    printu(the_conf.motcurrent[i]);
+    PROPNAME("motflags");
+    printuhex(*((uint8_t*)&the_conf.motflags[i]));
+    PROPNAME("eswreact");
+    printu(the_conf.ESW_reaction[i]);
+#undef PROPNAME
+    newline();
+    return RET_GOOD;
+}
 
 int fn_dumpconf(uint32_t _U_ hash, char _U_ *args){ // "dumpconf" (3271513185)
 #ifdef EBUG
@@ -212,28 +239,12 @@ int fn_dumpconf(uint32_t _U_ hash, char _U_ *args){ // "dumpconf" (3271513185)
     USB_sendstr("\nuserconf_sz="); printu(the_conf.userconf_sz);
     USB_sendstr("\ncanspeed="); printu(the_conf.CANspeed);
     USB_sendstr("\ncanid="); printu(the_conf.CANID);
+    newline();
+    char x[2] = {0};
     // motors' data
     for(int i = 0; i < MOTORSNO; ++i){
-        char cur = '0' + i;
-#define PROPNAME(nm)    do{newline(); USB_sendstr(nm); USB_putbyte(cur); USB_putbyte('=');}while(0)
-        PROPNAME("microsteps");
-        printu(the_conf.microsteps[i]);
-        PROPNAME("accel");
-        printu(the_conf.accel[i]);
-        PROPNAME("maxspeed");
-        printu(the_conf.maxspd[i]);
-        PROPNAME("minspeed");
-        printu(the_conf.minspd[i]);
-        PROPNAME("maxsteps");
-        printu(the_conf.maxsteps[i]);
-        PROPNAME("motcurrent");
-        printu(the_conf.motcurrent[i]);
-        PROPNAME("motflags");
-        printuhex(*((uint8_t*)&the_conf.motflags[i]));
-        PROPNAME("eswreact");
-        printu(the_conf.ESW_reaction[i]);
-#undef PROPNAME
+        x[0] = '0' + i;
+        fn_dumpmot(0, x);
     }
-    newline();
     return RET_GOOD;
 }
diff --git a/F3:F303/Multistepper/hashgen/hdr.c b/F3:F303/Multistepper/hashgen/hdr.c
index b3a39ba..e4f5cf5 100644
--- a/F3:F303/Multistepper/hashgen/hdr.c
+++ b/F3:F303/Multistepper/hashgen/hdr.c
@@ -56,6 +56,8 @@ int fn_dumpconf(uint32_t _U_ hash, char _U_ *args) WAL; // "dumpconf" (327151318
 
 int fn_dumperr(uint32_t _U_ hash, char _U_ *args) WAL; // "dumperr" (1223989764)
 
+int fn_dumpmot(uint32_t _U_ hash, char _U_ *args) WAL; // "dumpmot" (1224122507)
+
 int fn_dumpmotflags(uint32_t _U_ hash, char _U_ *args) WAL; // "dumpmotflags" (36159640)
 
 int fn_dumpstates(uint32_t _U_ hash, char _U_ *args) WAL; // "dumpstates" (4235564367)
@@ -216,6 +218,9 @@ int parsecmd(const char *str){
         case CMD_DUMPERR:
             return fn_dumperr(h, args);
         break;
+        case CMD_DUMPMOT:
+            return fn_dumpmot(h, args);
+        break;
         case CMD_DUMPMOTFLAGS:
             return fn_dumpmotflags(h, args);
         break;
diff --git a/F3:F303/Multistepper/hashgen/hdr.h b/F3:F303/Multistepper/hashgen/hdr.h
index 1bd8555..99831e3 100644
--- a/F3:F303/Multistepper/hashgen/hdr.h
+++ b/F3:F303/Multistepper/hashgen/hdr.h
@@ -38,6 +38,7 @@ extern char lastcmd[];
 #define CMD_DUMPCMD         (1223955823)
 #define CMD_DUMPCONF        (3271513185)
 #define CMD_DUMPERR         (1223989764)
+#define CMD_DUMPMOT         (1224122507)
 #define CMD_DUMPMOTFLAGS    (36159640)
 #define CMD_DUMPSTATES      (4235564367)
 #define CMD_EMSTOP          (2965919005)
diff --git a/F3:F303/Multistepper/hashgen/helpcmds.in b/F3:F303/Multistepper/hashgen/helpcmds.in
index 23e2d78..4a90b0e 100644
--- a/F3:F303/Multistepper/hashgen/helpcmds.in
+++ b/F3:F303/Multistepper/hashgen/helpcmds.in
@@ -20,6 +20,7 @@
     "dumperr - dump error codes\n"
     "dumpcmd - dump command codes\n"
     "dumpconf - dump current configuration\n"
+    "dumpmotN - dump Nth motor configuration\n"
     "dumpmotflags - dump motor flags' bits\n"
     "dumpstates - dump motors' state codes\n"
     "emstop[N] - emergency stop motor N or all\n"
diff --git a/F3:F303/Multistepper/hashgen/test b/F3:F303/Multistepper/hashgen/test
deleted file mode 100755
index 8fae8fc..0000000
Binary files a/F3:F303/Multistepper/hashgen/test and /dev/null differ
diff --git a/F3:F303/Multistepper/hashgen/testdic b/F3:F303/Multistepper/hashgen/testdic
index 0fe640b..530ceb7 100644
--- a/F3:F303/Multistepper/hashgen/testdic
+++ b/F3:F303/Multistepper/hashgen/testdic
@@ -20,6 +20,7 @@ drvtype
 dumperr
 dumpcmd
 dumpconf
+dumpmot
 dumpmotflags
 dumpstates
 emstop
diff --git a/F3:F303/Multistepper/main.c b/F3:F303/Multistepper/main.c
index e76ddcb..04d2427 100644
--- a/F3:F303/Multistepper/main.c
+++ b/F3:F303/Multistepper/main.c
@@ -45,11 +45,11 @@ int main(void){
     hw_setup(); // GPIO, ADC, timers, watchdog etc.
     USBPU_OFF(); // make a reconnection
     flashstorage_init();
-    init_steppers();
     USB_setup();
     CAN_setup(the_conf.CANspeed);
     adc_setup();
     pdnuart_setup();
+    init_steppers();
     USBPU_ON();
     uint32_t ctr = 0;
     CAN_message *can_mesg;
@@ -60,10 +60,9 @@ int main(void){
             LED_blink();
         }
         CAN_proc();
-        USB_proc(); // TODO: remove deprecated trash code!
         process_steppers();
         if(CAN_get_status() == CAN_FIFO_OVERRUN){
-            USB_sendstr("CAN bus fifo overrun occured!\n");
+            USB_sendstr("CAN_FIFO_OVERRUN\n");
         }
         while((can_mesg = CAN_messagebuf_pop())){
             if(can_mesg && isgood(can_mesg->ID)){
@@ -82,8 +81,13 @@ int main(void){
             }
         }
         int l = USB_receivestr(inbuff, MAXSTRLEN);
-        if(l < 0) USB_sendstr("ERROR: USB buffer overflow or string was too long\n");
+        if(l < 0) USB_sendstr("USB_BUF_OVERFLOW\n");
         else if(l){
+#ifdef EBUG
+            USB_sendstr("USB GOT:\n");
+            USB_sendstr(inbuff);
+            USB_sendstr("\n--------\n");
+#endif
             const char *ans = cmd_parser(inbuff);
             if(ans) USB_sendstr(ans);
         }
diff --git a/F3:F303/Multistepper/multistepper.bin b/F3:F303/Multistepper/multistepper.bin
index 77b7923..3c309ec 100755
Binary files a/F3:F303/Multistepper/multistepper.bin and b/F3:F303/Multistepper/multistepper.bin differ
diff --git a/F3:F303/Multistepper/proto.c b/F3:F303/Multistepper/proto.c
index 38f38c9..8c04193 100644
--- a/F3:F303/Multistepper/proto.c
+++ b/F3:F303/Multistepper/proto.c
@@ -205,7 +205,7 @@ static void add_filter(const char *str){
         USB_sendstr("No bank# given");
         return;
     }
-    if(N > STM32F0FBANKNO-1){
+    if(N > STM32FBANKNO-1){
         USB_sendstr("bank# > 27");
         return;
     }
diff --git a/F3:F303/Multistepper/ringbuffer.c b/F3:F303/Multistepper/ringbuffer.c
index 462d4c6..7f78f8c 100644
--- a/F3:F303/Multistepper/ringbuffer.c
+++ b/F3:F303/Multistepper/ringbuffer.c
@@ -18,19 +18,21 @@
 
 #include "ringbuffer.h"
 
-// stored data length
-int RB_datalen(ringbuffer *b){
+static int datalen(ringbuffer *b){
     if(b->tail >= b->head) return (b->tail - b->head);
     else return (b->length - b->head + b->tail);
 }
 
-/**
- * @brief RB_hasbyte - check if buffer has given byte stored
- * @param b - buffer
- * @param byte - byte to find
- * @return index if found, -1 if none
- */
-int RB_hasbyte(ringbuffer *b, uint8_t byte){
+// stored data length
+int RB_datalen(ringbuffer *b){
+    if(b->busy) return -1;
+    b->busy = 1;
+    int l = datalen(b);
+    b->busy = 0;
+    return l;
+}
+
+static int hasbyte(ringbuffer *b, uint8_t byte){
     if(b->head == b->tail) return -1; // no data in buffer
     int startidx = b->head;
     if(b->head > b->tail){ //
@@ -43,6 +45,20 @@ int RB_hasbyte(ringbuffer *b, uint8_t byte){
     return -1;
 }
 
+/**
+ * @brief RB_hasbyte - check if buffer has given byte stored
+ * @param b - buffer
+ * @param byte - byte to find
+ * @return index if found, -1 if none or busy
+ */
+int RB_hasbyte(ringbuffer *b, uint8_t byte){
+    if(b->busy) return -1;
+    b->busy = 1;
+    int ret = hasbyte(b, byte);
+    b->busy = 0;
+    return ret;
+}
+
 // poor memcpy
 static void mcpy(uint8_t *targ, const uint8_t *src, int l){
     while(l--) *targ++ = *src++;
@@ -54,15 +70,8 @@ TRUE_INLINE void incr(ringbuffer *b, volatile int *what, int n){
     if(*what >= b->length) *what -= b->length;
 }
 
-/**
- * @brief RB_read - read data from ringbuffer
- * @param b - buffer
- * @param s - array to write data
- * @param len - max len of `s`
- * @return bytes read
- */
-int RB_read(ringbuffer *b, uint8_t *s, int len){
-    int l = RB_datalen(b);
+static int read(ringbuffer *b, uint8_t *s, int len){
+    int l = datalen(b);
     if(!l) return 0;
     if(l > len) l = len;
     int _1st = b->length - b->head;
@@ -78,33 +87,49 @@ int RB_read(ringbuffer *b, uint8_t *s, int len){
     return _1st;
 }
 
+/**
+ * @brief RB_read - read data from ringbuffer
+ * @param b - buffer
+ * @param s - array to write data
+ * @param len - max len of `s`
+ * @return bytes read or -1 if busy
+ */
+int RB_read(ringbuffer *b, uint8_t *s, int len){
+    if(b->busy) return -1;
+    b->busy = 1;
+    int r = read(b, s, len);
+    b->busy = 0;
+    return r;
+}
+
+static int readto(ringbuffer *b, uint8_t byte, uint8_t *s, int len){
+    int idx = hasbyte(b, byte);
+    if(idx < 0) return 0;
+    int partlen = idx + 1 - b->head;
+    // now calculate length of new data portion
+    if(idx < b->head) partlen += b->length;
+    if(partlen > len) return -read(b, s, len);
+    return read(b, s, partlen);
+}
+
 /**
  * @brief RB_readto fill array `s` with data until byte `byte` (with it)
  * @param b - ringbuffer
  * @param byte - check byte
  * @param s - buffer to write data
  * @param len - length of `s`
- * @return amount of bytes written (negative, if len<data in buffer)
+ * @return amount of bytes written (negative, if len<data in buffer or buffer is busy)
  */
 int RB_readto(ringbuffer *b, uint8_t byte, uint8_t *s, int len){
-    int idx = RB_hasbyte(b, byte);
-    if(idx < 0) return 0;
-    int partlen = idx + 1 - b->head;
-    // now calculate length of new data portion
-    if(idx < b->head) partlen += b->length;
-    if(partlen > len) return -RB_read(b, s, len);
-    return RB_read(b, s, partlen);
+    if(b->busy) return -1;
+    b->busy = 1;
+    int n = readto(b, byte, s, len);
+    b->busy = 0;
+    return n;
 }
 
-/**
- * @brief RB_write - write some data to ringbuffer
- * @param b - buffer
- * @param str - data
- * @param l - length
- * @return amount of bytes written
- */
-int RB_write(ringbuffer *b, const uint8_t *str, int l){
-    int r = b->length - 1 - RB_datalen(b); // rest length
+static int write(ringbuffer *b, const uint8_t *str, int l){
+    int r = b->length - 1 - datalen(b); // rest length
     if(l > r) l = r;
     if(!l) return 0;
     int _1st = b->length - b->tail;
@@ -117,8 +142,27 @@ int RB_write(ringbuffer *b, const uint8_t *str, int l){
     return l;
 }
 
+/**
+ * @brief RB_write - write some data to ringbuffer
+ * @param b - buffer
+ * @param str - data
+ * @param l - length
+ * @return amount of bytes written or -1 if busy
+ */
+int RB_write(ringbuffer *b, const uint8_t *str, int l){
+    if(b->busy) return -1;
+    b->busy = 1;
+    int w = write(b, str, l);
+    b->busy = 0;
+    return w;
+}
+
 // just delete all information in buffer `b`
-void RB_clearbuf(ringbuffer *b){
+int RB_clearbuf(ringbuffer *b){
+    if(b->busy) return -1;
+    b->busy = 1;
     b->head = 0;
     b->tail = 0;
+    b->busy = 0;
+    return 1;
 }
diff --git a/F3:F303/Multistepper/ringbuffer.h b/F3:F303/Multistepper/ringbuffer.h
index 6d6b5d3..549b5c0 100644
--- a/F3:F303/Multistepper/ringbuffer.h
+++ b/F3:F303/Multistepper/ringbuffer.h
@@ -25,6 +25,7 @@ typedef struct{
     const int length;   // its length
     int head;           // head index
     int tail;           // tail index
+    volatile int busy; // == TRUE if buffer is busy now
 } ringbuffer;
 
 int RB_read(ringbuffer *b, uint8_t *s, int len);
@@ -32,4 +33,4 @@ int RB_readto(ringbuffer *b, uint8_t byte, uint8_t *s, int len);
 int RB_hasbyte(ringbuffer *b, uint8_t byte);
 int RB_write(ringbuffer *b, const uint8_t *str, int l);
 int RB_datalen(ringbuffer *b);
-void RB_clearbuf(ringbuffer *b);
+int RB_clearbuf(ringbuffer *b);
diff --git a/F3:F303/Multistepper/usb.c b/F3:F303/Multistepper/usb.c
index 590a33e..313e723 100644
--- a/F3:F303/Multistepper/usb.c
+++ b/F3:F303/Multistepper/usb.c
@@ -1,6 +1,6 @@
 /*
  * This file is part of the multistepper project.
- * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ * Copyright 2024 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
@@ -19,27 +19,31 @@
 #include <string.h>
 
 #include "hardware.h"
-#include "ringbuffer.h"
 #include "usb.h"
 #include "usb_lib.h"
+#ifdef EBUG
+#include "strfunc.h"
+#endif
 
 static volatile uint8_t usbbuff[USB_TXBUFSZ]; // temporary buffer for sending data
 // ring buffers for incoming and outgoing data
 static uint8_t obuf[RBOUTSZ], ibuf[RBINSZ];
-static volatile ringbuffer out = {.data = obuf, .length = RBOUTSZ, .head = 0, .tail = 0};
-static volatile ringbuffer in = {.data = ibuf, .length = RBINSZ, .head = 0, .tail = 0};
-// transmission is succesfull
-static volatile uint8_t bufisempty = 1;
-static volatile uint8_t bufovrfl = 0;
+volatile ringbuffer rbout = {.data = obuf, .length = RBOUTSZ, .head = 0, .tail = 0};
+volatile ringbuffer rbin = {.data = ibuf, .length = RBINSZ, .head = 0, .tail = 0};
+// inbuf overflow when receiving
+volatile uint8_t bufovrfl = 0;
+// last send data size
+static volatile int lastdsz = 0;
 
-static void send_next(){
-    if(bufisempty) return;
-    static int lastdsz = 0;
-    int buflen = RB_read((ringbuffer*)&out, (uint8_t*)usbbuff, USB_TXBUFSZ);
-    if(!buflen){
+// called from transmit EP
+void send_next(){
+    int buflen = RB_read((ringbuffer*)&rbout, (uint8_t*)usbbuff, USB_TXBUFSZ);
+    if(buflen == 0){
         if(lastdsz == 64) EP_Write(3, NULL, 0); // send ZLP after 64 bits packet when nothing more to send
         lastdsz = 0;
-        bufisempty = 1;
+        return;
+    }else if(buflen < 0){
+        EP_Write(3, NULL, 0); // send ZLP if buffer is in writting state now
         return;
     }
     EP_Write(3, (uint8_t*)usbbuff, buflen);
@@ -48,44 +52,42 @@ static void send_next(){
 
 // blocking send full content of ring buffer
 int USB_sendall(){
-    while(!bufisempty){
-        if(!usbON) return 0;
+    while(lastdsz > 0){
+        if(!usbON) return FALSE;
     }
-    return 1;
+    return TRUE;
 }
 
 // put `buf` into queue to send
 int USB_send(const uint8_t *buf, int len){
-    if(!buf || !usbON || !len) return 0;
+    if(!buf || !usbON || !len) return FALSE;
     while(len){
-        int a = RB_write((ringbuffer*)&out, buf, len);
-        len -= a;
-        buf += a;
-        if(bufisempty){
-            bufisempty = 0;
-            send_next();
-        }
+        int a = RB_write((ringbuffer*)&rbout, buf, len);
+        if(a > 0){
+            len -= a;
+            buf += a;
+        } else if (a < 0) continue; // do nothing if buffer is in reading state
+        if(lastdsz == 0) send_next(); // need to run manually - all data sent, so no IRQ on IN
     }
-    return 1;
+    return TRUE;
 }
 
 int USB_putbyte(uint8_t byte){
-    if(!usbON) return 0;
-    while(0 == RB_write((ringbuffer*)&out, &byte, 1)){
-        if(bufisempty){
-            bufisempty = 0;
-            send_next();
-        }
+    if(!usbON) return FALSE;
+    int l = 0;
+    while((l = RB_write((ringbuffer*)&rbout, &byte, 1)) != 1){
+        if(l < 0) continue;
     }
-    return 1;
+    if(lastdsz == 0) send_next(); // need to run manually - all data sent, so no IRQ on IN
+    return TRUE;
 }
 
 int USB_sendstr(const char *string){
-    if(!string || !usbON) return 0;
+    if(!string || !usbON) return FALSE;
     int len = 0;
     const char *b = string;
     while(*b++) ++len;
-    if(!len) return 0;
+    if(!len) return FALSE;
     return USB_send((const uint8_t*)string, len);
 }
 
@@ -96,13 +98,14 @@ int USB_sendstr(const char *string){
  * @return amount of received bytes (negative, if overfull happened)
  */
 int USB_receive(uint8_t *buf, int len){
-    int sz = RB_read((ringbuffer*)&in, buf, len);
+    chkin();
     if(bufovrfl){
-        RB_clearbuf((ringbuffer*)&in);
-        if(!sz) sz = -1;
-        else sz = -sz;
+        while(1 != RB_clearbuf((ringbuffer*)&rbin));
         bufovrfl = 0;
+        return -1;
     }
+    int sz = RB_read((ringbuffer*)&rbin, buf, len);
+    if(sz < 0) return 0; // buffer in writting state
     return sz;
 }
 
@@ -113,65 +116,25 @@ int USB_receive(uint8_t *buf, int len){
  * @return strlen or negative value indicating overflow (if so, string won't be ends with 0 and buffer should be cleared)
  */
 int USB_receivestr(char *buf, int len){
-    int l = RB_readto((ringbuffer*)&in, '\n', (uint8_t*)buf, len);
-    if(l == 0) return 0;
-    if(--l < 0 || bufovrfl) RB_clearbuf((ringbuffer*)&in);
-    else buf[l] = 0; // replace '\n' with strend
+    chkin();
     if(bufovrfl){
-        if(l > 0) l = -l;
-        else l = -1;
+        while(1 != RB_clearbuf((ringbuffer*)&rbin));
         bufovrfl = 0;
+        return -1;
     }
+    int l = RB_readto((ringbuffer*)&rbin, '\n', (uint8_t*)buf, len);
+    if(l < 1){
+        if(rbin.length == RB_datalen((ringbuffer*)&rbin)){ // buffer is full but no '\n' found
+            while(1 != RB_clearbuf((ringbuffer*)&rbin));
+            return -1;
+        }
+        return 0;
+    }
+#ifdef EBUG
+    USB_sendstr("readto, l="); USB_sendstr(u2str(l)); newline();
+#endif
+    if(l == 0) return 0;
+    buf[l-1] = 0; // replace '\n' with strend
     return l;
 }
 
-// interrupt IN handler (never used?)
-static void EP1_Handler(){
-    uint16_t epstatus = KEEP_DTOG(USB->EPnR[1]);
-    if(RX_FLAG(epstatus)) epstatus = (epstatus & ~USB_EPnR_STAT_TX) ^ USB_EPnR_STAT_RX; // set valid RX
-    else epstatus = epstatus & ~(USB_EPnR_STAT_TX|USB_EPnR_STAT_RX);
-    // clear CTR
-    epstatus = (epstatus & ~(USB_EPnR_CTR_RX|USB_EPnR_CTR_TX));
-    USB->EPnR[1] = epstatus;
-}
-
-// data IN/OUT handlers
-static void transmit_Handler(){ // EP3IN
-    uint16_t epstatus = KEEP_DTOG_STAT(USB->EPnR[3]);
-    // clear CTR keep DTOGs & STATs
-    USB->EPnR[3] = (epstatus & ~(USB_EPnR_CTR_TX)); // clear TX ctr
-    send_next();
-}
-
-static void receive_Handler(){ // EP2OUT
-    uint8_t buf[USB_RXBUFSZ];
-    uint16_t epstatus = KEEP_DTOG(USB->EPnR[2]);
-    uint8_t sz = EP_Read(2, (uint8_t*)buf);
-    if(sz){
-        if(RB_write((ringbuffer*)&in, buf, sz) != sz) bufovrfl = 1;
-    }
-    // keep stat_tx & set ACK rx, clear RX ctr
-    USB->EPnR[2] = (epstatus & ~USB_EPnR_CTR_RX) ^ USB_EPnR_STAT_RX;
-}
-
-void USB_proc(){
-    switch(USB_Dev.USB_Status){
-        case USB_STATE_CONFIGURED:
-            // make new BULK endpoint
-            // Buffer have 1024 bytes, but last 256 we use for CAN bus (30.2 of RM: USB main features)
-            EP_Init(1, EP_TYPE_INTERRUPT, USB_EP1BUFSZ, 0, EP1_Handler); // IN1 - transmit
-            EP_Init(2, EP_TYPE_BULK, 0, USB_RXBUFSZ, receive_Handler); // OUT2 - receive data
-            EP_Init(3, EP_TYPE_BULK, USB_TXBUFSZ, 0, transmit_Handler); // IN3 - transmit data
-            USB_Dev.USB_Status = USB_STATE_CONNECTED;
-        break;
-        case USB_STATE_DEFAULT:
-        case USB_STATE_ADDRESSED:
-            if(usbON){
-                usbON = 0;
-            }
-        break;
-        default: // USB_STATE_CONNECTED - send next data portion
-            // if(!usbON) return; // WTF?
-        break;
-    }
-}
diff --git a/F3:F303/Multistepper/usb.h b/F3:F303/Multistepper/usb.h
index 5b62cc5..cd2808e 100644
--- a/F3:F303/Multistepper/usb.h
+++ b/F3:F303/Multistepper/usb.h
@@ -1,6 +1,6 @@
 /*
  * This file is part of the multistepper project.
- * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ * Copyright 2024 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
@@ -18,11 +18,12 @@
 
 #pragma once
 
+#include "ringbuffer.h"
 #include "usbhw.h"
 
 // sizes of ringbuffers for outgoing and incoming data
 #define RBOUTSZ     (512)
-#define RBINSZ      (512)
+#define RBINSZ      (256)
 
 #define newline()   USB_putbyte('\n')
 #define USND(s)     do{USB_sendstr(s); USB_putbyte('\n');}while(0)
@@ -36,7 +37,10 @@
 #define DBG(str)
 #endif
 
-void USB_proc();
+extern volatile ringbuffer rbout, rbin;
+extern volatile uint8_t bufisempty, bufovrfl;
+
+void send_next();
 int USB_sendall();
 int USB_send(const uint8_t *buf, int len);
 int USB_putbyte(uint8_t byte);
diff --git a/F3:F303/Multistepper/usb_lib.c b/F3:F303/Multistepper/usb_lib.c
index 4db6281..3ced8ec 100644
--- a/F3:F303/Multistepper/usb_lib.c
+++ b/F3:F303/Multistepper/usb_lib.c
@@ -1,6 +1,6 @@
 /*
  * This file is part of the multistepper project.
- * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ * Copyright 2024 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
@@ -17,14 +17,16 @@
  */
 
 #include <stdint.h>
+#include "usb.h"
 #include "usb_lib.h"
+#include "usbhw.h"
 
 ep_t endpoints[STM32ENDPOINTS];
 
-usb_dev_t USB_Dev;
+static uint16_t USB_Addr = 0;
 static usb_LineCoding lineCoding = {115200, 0, 0, 8};
-config_pack_t setup_packet;
-uint8_t ep0databuf[EP0DATABUF_SIZE];
+uint8_t ep0databuf[EP0DATABUF_SIZE], setupdatabuf[EP0DATABUF_SIZE];
+config_pack_t *setup_packet = (config_pack_t*) setupdatabuf;
 
 usb_LineCoding getLineCoding(){return lineCoding;}
 
@@ -53,9 +55,9 @@ static const uint8_t USB_DeviceDescriptor[] = {
         0x23,   // idProduct_H
         0x00,   // bcdDevice_Ver_L
         0x03,   // bcdDevice_Ver_H
-        0x01,   // iManufacturer
-        0x02,   // iProduct
-        0x00,   // iSerialNumber
+        iMANUFACTURER_DESCR,   // iManufacturer
+        iPRODUCT_DESCR,   // iProduct
+        iSERIAL_DESCR,   // iSerialNumber
         bNumConfigurations    // bNumConfigurations
 };
 
@@ -95,7 +97,7 @@ static const uint8_t USB_ConfigDescriptor[] = {
         0xff, /* bInterfaceClass */
         0x00, /* bInterfaceSubClass */
         0x00, /* bInterfaceProtocol */
-        0x00, /* iInterface: */
+        iINTERFACE_DESCR, /* iInterface: */
 ///////////////////////////////////////////////////
         /*Endpoint 1 Descriptor*/
         0x07, /* bLength: Endpoint Descriptor size */
@@ -125,11 +127,19 @@ static const uint8_t USB_ConfigDescriptor[] = {
         0x00, /* bInterval: ignore for Bulk transfer */
 };
 
-_USB_LANG_ID_(USB_StringLangDescriptor, LANG_US);
-// these descriptors are not used in PL2303 emulator!
-_USB_STRING_(USB_StringSerialDescriptor, u"0");
-_USB_STRING_(USB_StringManufacturingDescriptor, u"Prolific Technology Inc.");
-_USB_STRING_(USB_StringProdDescriptor, u"USB-Serial Controller");
+_USB_LANG_ID_(LD, LANG_US);
+_USB_STRING_(SD, u"0.0.1");
+_USB_STRING_(MD, u"Prolific Technology Inc.");
+_USB_STRING_(PD, u"USB-Serial Controller");
+_USB_STRING_(ID, u"multistepper");
+static void const *StringDescriptor[iDESCR_AMOUNT] = {
+    [iLANGUAGE_DESCR] = &LD,
+    [iMANUFACTURER_DESCR] = &MD,
+    [iPRODUCT_DESCR] = &PD,
+    [iSERIAL_DESCR] = &SD,
+    [iINTERFACE_DESCR] = &ID
+};
+
 
 /*
  * default handlers
@@ -171,7 +181,7 @@ void WEAK vendor_handler(config_pack_t *packet){
 }
 
 static void wr0(const uint8_t *buf, uint16_t size){
-    if(setup_packet.wLength < size) size = setup_packet.wLength; // shortened request
+    if(setup_packet->wLength < size) size = setup_packet->wLength; // shortened request
     if(size < endpoints[0].txbufsz){
         EP_WriteIRQ(0, buf, size);
         return;
@@ -199,24 +209,18 @@ static void wr0(const uint8_t *buf, uint16_t size){
 }
 
 static inline void get_descriptor(){
-    switch(setup_packet.wValue){
+    uint8_t descrtype = setup_packet->wValue >> 8,
+            descridx = setup_packet->wValue & 0xff;
+    switch(descrtype){
         case DEVICE_DESCRIPTOR:
             wr0(USB_DeviceDescriptor, sizeof(USB_DeviceDescriptor));
         break;
         case CONFIGURATION_DESCRIPTOR:
             wr0(USB_ConfigDescriptor, sizeof(USB_ConfigDescriptor));
         break;
-        case STRING_LANG_DESCRIPTOR:
-            wr0((const uint8_t *)&USB_StringLangDescriptor, STRING_LANG_DESCRIPTOR_SIZE_BYTE);
-        break;
-        case STRING_MAN_DESCRIPTOR:
-            wr0((const uint8_t *)&USB_StringManufacturingDescriptor, USB_StringManufacturingDescriptor.bLength);
-        break;
-        case STRING_PROD_DESCRIPTOR:
-            wr0((const uint8_t *)&USB_StringProdDescriptor, USB_StringProdDescriptor.bLength);
-        break;
-        case STRING_SN_DESCRIPTOR:
-            wr0((const uint8_t *)&USB_StringSerialDescriptor, USB_StringSerialDescriptor.bLength);
+        case STRING_DESCRIPTOR:
+            if(descridx < iDESCR_AMOUNT) wr0((const uint8_t *)StringDescriptor[descridx], *((uint8_t*)StringDescriptor[descridx]));
+            else EP_WriteIRQ(0, (uint8_t*)0, 0);
         break;
         case DEVICE_QUALIFIER_DESCRIPTOR:
             wr0(USB_DeviceQualifierDescriptor, USB_DeviceQualifierDescriptor[0]);
@@ -229,7 +233,7 @@ static inline void get_descriptor(){
 static uint16_t configuration = 0; // reply for GET_CONFIGURATION (==1 if configured)
 static inline void std_d2h_req(){
     uint16_t status = 0; // bus powered
-    switch(setup_packet.bRequest){
+    switch(setup_packet->bRequest){
         case GET_DESCRIPTOR:
             get_descriptor();
         break;
@@ -244,16 +248,61 @@ static inline void std_d2h_req(){
     }
 }
 
+// interrupt IN handler (never used?)
+static void EP1_Handler(){
+    uint16_t epstatus = KEEP_DTOG(USB->EPnR[1]);
+    if(RX_FLAG(epstatus)) epstatus = (epstatus & ~USB_EPnR_STAT_TX) ^ USB_EPnR_STAT_RX; // set valid RX
+    else epstatus = epstatus & ~(USB_EPnR_STAT_TX|USB_EPnR_STAT_RX);
+    // clear CTR
+    epstatus = (epstatus & ~(USB_EPnR_CTR_RX|USB_EPnR_CTR_TX));
+    USB->EPnR[1] = epstatus;
+}
+
+// data IN/OUT handlers
+static void transmit_Handler(){ // EP3IN
+    uint16_t epstatus = KEEP_DTOG_STAT(USB->EPnR[3]);
+    // clear CTR keep DTOGs & STATs
+    USB->EPnR[3] = (epstatus & ~(USB_EPnR_CTR_TX)); // clear TX ctr
+    send_next();
+}
+
+static uint8_t rcvbuf[USB_RXBUFSZ];
+static uint8_t volatile rcvbuflen = 0;
+
+void chkin(){
+    if(bufovrfl) return;
+    if(!rcvbuflen) return;
+    int w = RB_write((ringbuffer*)&rbin, rcvbuf, rcvbuflen);
+    if(w < 0) return;
+    if(w != rcvbuflen) bufovrfl = 1;
+    rcvbuflen = 0;
+    uint16_t status = KEEP_DTOG(USB->EPnR[2]); // don't change DTOG
+    USB->EPnR[2] = status ^ USB_EPnR_STAT_RX;
+}
+
+// receiver reads data from local buffer and only then ACK'ed
+static void receive_Handler(){ // EP2OUT
+    uint16_t status = KEEP_DTOG_STAT(USB->EPnR[2]); // don't change DTOG and NACK
+    if(rcvbuflen){
+        bufovrfl = 1; // lost last data
+        rcvbuflen = 0;
+    }
+    rcvbuflen = EP_Read(2, (uint8_t*)rcvbuf);
+    USB->EPnR[2] = status & ~USB_EPnR_CTR_RX;
+}
+
 static inline void std_h2d_req(){
-    switch(setup_packet.bRequest){
+    switch(setup_packet->bRequest){
         case SET_ADDRESS:
             // new address will be assigned later - after  acknowlegement or request to host
-            USB_Dev.USB_Addr = setup_packet.wValue;
+            USB_Addr = setup_packet->wValue;
         break;
         case SET_CONFIGURATION:
             // Now device configured
-            USB_Dev.USB_Status = USB_STATE_CONFIGURED;
-            configuration = setup_packet.wValue;
+            configuration = setup_packet->wValue;
+            EP_Init(1, EP_TYPE_INTERRUPT, USB_EP1BUFSZ, 0, EP1_Handler); // IN1 - transmit
+            EP_Init(2, EP_TYPE_BULK, 0, USB_RXBUFSZ, receive_Handler); // OUT2 - receive data
+            EP_Init(3, EP_TYPE_BULK, USB_TXBUFSZ, 0, transmit_Handler); // IN3 - transmit data
         break;
         default:
         break;
@@ -271,8 +320,8 @@ bmRequestType: 76543210
  */
 void EP0_Handler(){
     uint16_t epstatus = USB->EPnR[0]; // EP0R on input -> return this value after modifications
-    uint8_t reqtype = setup_packet.bmRequestType & 0x7f;
-    uint8_t dev2host = (setup_packet.bmRequestType & 0x80) ? 1 : 0;
+    uint8_t reqtype = setup_packet->bmRequestType & 0x7f;
+    uint8_t dev2host = (setup_packet->bmRequestType & 0x80) ? 1 : 0;
     int rxflag = RX_FLAG(epstatus);
     if(rxflag && SETUP_FLAG(epstatus)){
         switch(reqtype){
@@ -285,15 +334,15 @@ void EP0_Handler(){
                 }
             break;
             case STANDARD_ENDPOINT_REQUEST_TYPE: // standard endpoint request
-                if(setup_packet.bRequest == CLEAR_FEATURE){
+                if(setup_packet->bRequest == CLEAR_FEATURE){
                     EP_WriteIRQ(0, (uint8_t *)0, 0);
                 }
             break;
             case VENDOR_REQUEST_TYPE:
-                vendor_handler(&setup_packet);
+                vendor_handler(setup_packet);
             break;
             case CONTROL_REQUEST_TYPE:
-                switch(setup_packet.bRequest){
+                switch(setup_packet->bRequest){
                     case GET_LINE_CODING:
                         EP_WriteIRQ(0, (uint8_t*)&lineCoding, sizeof(lineCoding));
                     break;
@@ -301,7 +350,7 @@ void EP0_Handler(){
                     break;
                     case SET_CONTROL_LINE_STATE:
                         usbON = 1;
-                        clstate_handler(setup_packet.wValue);
+                        clstate_handler(setup_packet->wValue);
                     break;
                     case SEND_BREAK:
                         usbON = 0;
@@ -310,23 +359,22 @@ void EP0_Handler(){
                     default:
                     break;
                 }
-                if(setup_packet.bRequest != GET_LINE_CODING) EP_WriteIRQ(0, (uint8_t *)0, 0); // write acknowledgement
+                if(setup_packet->bRequest != GET_LINE_CODING) EP_WriteIRQ(0, (uint8_t *)0, 0); // write acknowledgement
             break;
             default:
                 EP_WriteIRQ(0, (uint8_t *)0, 0);
         }
     }else if(rxflag){ // got data over EP0 or host acknowlegement
         if(endpoints[0].rx_cnt){
-            if(setup_packet.bRequest == SET_LINE_CODING){
+            if(setup_packet->bRequest == SET_LINE_CODING){
                 linecoding_handler((usb_LineCoding*)ep0databuf);
             }
         }
     } else if(TX_FLAG(epstatus)){ // package transmitted
         // now we can change address after enumeration
-        if ((USB->DADDR & USB_DADDR_ADD) != USB_Dev.USB_Addr){
-            USB->DADDR = USB_DADDR_EF | USB_Dev.USB_Addr;
-            // change state to ADRESSED
-            USB_Dev.USB_Status = USB_STATE_ADDRESSED;
+        if ((USB->DADDR & USB_DADDR_ADD) != USB_Addr){
+            USB->DADDR = USB_DADDR_EF | USB_Addr;
+            usbON = 0;
         }
     }
     epstatus = KEEP_DTOG(USB->EPnR[0]);
diff --git a/F3:F303/Multistepper/usb_lib.h b/F3:F303/Multistepper/usb_lib.h
index ddfc8b2..f35917d 100644
--- a/F3:F303/Multistepper/usb_lib.h
+++ b/F3:F303/Multistepper/usb_lib.h
@@ -1,6 +1,6 @@
 /*
  * This file is part of the multistepper project.
- * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ * Copyright 2024 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
@@ -60,14 +60,21 @@
 #define CONTROL_DTR                     0x01
 #define CONTROL_RTS                     0x02
 
-// wValue
-#define DEVICE_DESCRIPTOR               0x100
-#define CONFIGURATION_DESCRIPTOR        0x200
-#define STRING_LANG_DESCRIPTOR          0x300
-#define STRING_MAN_DESCRIPTOR           0x301
-#define STRING_PROD_DESCRIPTOR          0x302
-#define STRING_SN_DESCRIPTOR            0x303
-#define DEVICE_QUALIFIER_DESCRIPTOR     0x600
+// string descriptors
+enum{
+    iLANGUAGE_DESCR,
+    iMANUFACTURER_DESCR,
+    iPRODUCT_DESCR,
+    iSERIAL_DESCR,
+    iINTERFACE_DESCR,
+    iDESCR_AMOUNT
+};
+
+// Types of descriptors
+#define DEVICE_DESCRIPTOR               0x01
+#define CONFIGURATION_DESCRIPTOR        0x02
+#define STRING_DESCRIPTOR               0x03
+#define DEVICE_QUALIFIER_DESCRIPTOR     0x06
 
 #define RX_FLAG(epstat)                 (epstat & USB_EPnR_CTR_RX)
 #define TX_FLAG(epstat)                 (epstat & USB_EPnR_CTR_TX)
@@ -77,14 +84,6 @@
 #define KEEP_DTOG_STAT(EPnR)            (EPnR & ~(USB_EPnR_STAT_RX|USB_EPnR_STAT_TX|USB_EPnR_DTOG_RX|USB_EPnR_DTOG_TX))
 #define KEEP_DTOG(EPnR)                 (EPnR & ~(USB_EPnR_DTOG_RX|USB_EPnR_DTOG_TX))
 
-// USB state: uninitialized, addressed, ready for use
-typedef enum{
-    USB_STATE_DEFAULT,
-    USB_STATE_ADDRESSED,
-    USB_STATE_CONFIGURED,
-    USB_STATE_CONNECTED
-} USB_state;
-
 // EP types
 #define EP_TYPE_BULK                    0x00
 #define EP_TYPE_CONTROL                 0x01
@@ -93,6 +92,16 @@ typedef enum{
 
 #define LANG_US (uint16_t)0x0409
 
+#if 0
+typedef struct{
+    uint8_t  bLength;
+    uint8_t  bDescriptorType;
+    uint16_t *bString;
+} string_descriptor_t;
+
+#define _USB_STRING_(name, str) string_descriptor_t name = {(sizeof(str) + 2), STRING_DESCRIPTOR, str}
+#endif
+
 #define _USB_STRING_(name, str)                  \
 static const struct name \
 {                          \
@@ -113,7 +122,6 @@ static const struct name \
     \
 } \
 name = {0x04, 0x03, lng_id}
-#define STRING_LANG_DESCRIPTOR_SIZE_BYTE    (4)
 
 // EP0 configuration packet
 typedef struct {
@@ -133,12 +141,6 @@ typedef struct{
     unsigned rx_cnt  : 10;      // received data counter
 } ep_t;
 
-// USB status & its address
-typedef struct {
-    uint8_t  USB_Status;
-    uint16_t USB_Addr;
-}usb_dev_t;
-
 typedef struct {
     uint32_t dwDTERate;
     uint8_t bCharFormat;
@@ -163,10 +165,9 @@ typedef struct {
 } __attribute__ ((packed)) usb_cdc_notification;
 
 extern ep_t endpoints[];
-extern usb_dev_t USB_Dev;
 extern volatile uint8_t usbON;
-extern config_pack_t setup_packet;
-extern uint8_t ep0databuf[];
+extern config_pack_t *setup_packet;
+extern uint8_t ep0databuf[], setupdatabuf[];
 
 void EP0_Handler();
 
@@ -179,3 +180,4 @@ void linecoding_handler(usb_LineCoding *lc);
 void clstate_handler(uint16_t val);
 void break_handler();
 void vendor_handler(config_pack_t *packet);
+void chkin();
diff --git a/F3:F303/Multistepper/usbhw.c b/F3:F303/Multistepper/usbhw.c
index 33a3432..9f6dc67 100644
--- a/F3:F303/Multistepper/usbhw.c
+++ b/F3:F303/Multistepper/usbhw.c
@@ -1,6 +1,6 @@
 /*
  * This file is part of the multistepper project.
- * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ * Copyright 2024 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
@@ -50,10 +50,10 @@ static uint16_t lastaddr = LASTADDR_DEFAULT;
 int EP_Init(uint8_t number, uint8_t type, uint16_t txsz, uint16_t rxsz, void (*func)(ep_t ep)){
     if(number >= STM32ENDPOINTS) return 4; // out of configured amount
     if(txsz > USB_BTABLE_SIZE || rxsz > USB_BTABLE_SIZE) return 1; // buffer too large
-    if(lastaddr + txsz + rxsz >= USB_BTABLE_SIZE) return 2; // out of btable
+    if(lastaddr + txsz + rxsz >= USB_BTABLE_SIZE/ACCESSZ) return 2; // out of btable
     USB->EPnR[number] = (type << 9) | (number & USB_EPnR_EA);
     USB->EPnR[number] ^= USB_EPnR_STAT_RX | USB_EPnR_STAT_TX_1;
-    if(rxsz & 1 || rxsz > 512) return 3; // wrong rx buffer size
+    if(rxsz & 1 || rxsz > USB_BTABLE_SIZE) return 3; // wrong rx buffer size
     uint16_t countrx = 0;
     if(rxsz < 64) countrx = rxsz / 2;
     else{
@@ -84,7 +84,6 @@ void usb_lp_isr(){
         lastaddr = LASTADDR_DEFAULT;
         // clear address, leave only enable bit
         USB->DADDR = USB_DADDR_EF;
-        USB_Dev.USB_Status = USB_STATE_DEFAULT;
         if(EP_Init(0, EP_TYPE_CONTROL, USB_EP0_BUFSZ, USB_EP0_BUFSZ, EP0_Handler)){
             return;
         }
@@ -101,10 +100,10 @@ void usb_lp_isr(){
         if(USB->ISTR & USB_ISTR_DIR){ // OUT interrupt - receive data, CTR_RX==1 (if CTR_TX == 1 - two pending transactions: receive following by transmit)
             if(n == 0){ // control endpoint
                 if(epstatus & USB_EPnR_SETUP){ // setup packet -> copy data to conf_pack
-                    EP_Read(0, (uint8_t*)&setup_packet);
+                    EP_Read(0, setupdatabuf);
                     // interrupt handler will be called later
                 }else if(epstatus & USB_EPnR_CTR_RX){ // data packet -> push received data to ep0databuf
-                    EP_Read(0, (uint8_t*)&ep0databuf);
+                    EP_Read(0, ep0databuf);
                 }
             }
         }
diff --git a/F3:F303/Multistepper/usbhw.h b/F3:F303/Multistepper/usbhw.h
index ca6fd25..5915191 100644
--- a/F3:F303/Multistepper/usbhw.h
+++ b/F3:F303/Multistepper/usbhw.h
@@ -1,6 +1,6 @@
 /*
  * This file is part of the multistepper project.
- * Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ * Copyright 2024 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
diff --git a/F3:F303/Multistepper/version.inc b/F3:F303/Multistepper/version.inc
index d05e2b0..16d71ff 100644
--- a/F3:F303/Multistepper/version.inc
+++ b/F3:F303/Multistepper/version.inc
@@ -1,2 +1,2 @@
-#define BUILD_NUMBER "119"
-#define BUILD_DATE "2024-08-16"
+#define BUILD_NUMBER "160"
+#define BUILD_DATE "2024-08-26"