-flto

G0:G070/i2c/Makefile

@@ -64,11 +64,11 @@ CFLAGS		+= -O2 -MD -D__thumb2__=1
 CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration
 CFLAGS		+= -Wredundant-decls $(INCLUDE)
 # -Wmissing-prototypes -Wstrict-prototypes
-CFLAGS		+= -fno-common -ffunction-sections -fdata-sections 
+CFLAGS		+= -fno-common -ffunction-sections -fdata-sections -flto
 
 ###############################################################################
 # Linker flags
-LDFLAGS		+= --static -nostartfiles --specs=nano.specs 
+LDFLAGS		+= --static -nostartfiles --specs=nano.specs -flto
 LDFLAGS		+= -L$(LIB_DIR)
 LDFLAGS		+= -T$(LDSCRIPT)
 LDFLAGS		+= -Wl,-Map=$(OBJDIR)/$(BINARY).map

G0:G070/i2c/i2c.c

@@ -17,7 +17,8 @@
  */
 
 #include <stm32g0.h>
-#include "strfunc.h" // mymemcpy
+#include <string.h>
+#include "strfunc.h" // hexdump
 #include "usart.h"
 #include "i2c.h"
 
@@ -166,7 +167,7 @@ uint8_t write_i2c(uint8_t addr, uint8_t *data, uint8_t nbytes){
 
 uint8_t write_i2c_dma(uint8_t addr, uint8_t *data, uint8_t nbytes){
     if(!data || nbytes < 1) return 0;
-    mymemcpy((char*)I2Cbuf, (char*)data, nbytes);
+    memcpy((char*)I2Cbuf, (char*)data, nbytes);
     if(isI2Cbusy()) return 0;
     i2cDMAsetup(1, nbytes);
     goterr = 0;

G0:G070/i2c/proto.c

@@ -17,6 +17,7 @@
  */
 
 #include <stm32g0.h>
+#include <string.h>
 #include "i2c.h"
 #include "strfunc.h"
 #include "usart.h"
@@ -24,6 +25,7 @@
 #define LOCBUFFSZ       (32)
 // local buffer for I2C data to send
 static uint8_t locBuffer[LOCBUFFSZ];
+extern volatile uint32_t Tms;
 
 const char *helpstring =
         "i0..2 - setup I2C with lowest..highest speed (7.7, 10 and 100kHz)\n"
@@ -36,6 +38,7 @@ const char *helpstring =
         "In n - just read n bytes\n"
         "IN n - the same but with DMA\n"
         "Is - scan I2C bus\n"
+        "T - print current Tms\n"
         "U - send long buffer over USART\n"
 ;
 
@@ -167,6 +170,11 @@ char *parse_cmd(char *buf){
     // "short" commands
     if(buf[1]) return buf; // echo wrong data
     switch(*buf){
+        case 'T':
+            usart3_sendstr("T=");
+            usart3_sendstr(u2str(Tms));
+            usart3_send("\n", 1);
+        break;
         case 'U':
             U3sendlong(longbuff);
         break;

G0:G070/i2c/strfunc.c

@@ -247,7 +247,9 @@ char *getnum(const char *txt, uint32_t *N){
     return nxt;
 }
 
+/*
 void mymemcpy(char *dest, const char *src, int len){
     if(len < 1) return;
     while(len--) *dest++ = *src++;
 }
+*/

G0:G070/i2c/usart.c

@@ -19,7 +19,6 @@
 #include <stm32g0.h>
 #include <string.h>
 
-#include "strfunc.h" // mymemcpy
 #include "usart.h"
 
 // RX/TX DMA->CCR without EN flag
@@ -84,7 +83,7 @@ int usart3_send(const char *str, int len){
     int rest = UARTBUFSZ - txlen[tbufno];
     if(rest == 0 && !u3txrdy) return 0; // buffer is full while transmission in process
     if(len < rest) rest = len;
-    mymemcpy((char*)(tbuf[tbufno] + txlen[tbufno]), str, rest);
+    memcpy((char*)(tbuf[tbufno] + txlen[tbufno]), str, rest);
     txlen[tbufno] += rest;
     if(!u3txrdy) return rest;
     if(txlen[tbufno] == UARTBUFSZ) usart3_sendbuf();
@@ -92,7 +91,7 @@ int usart3_send(const char *str, int len){
     len -= rest;
     // now fill another - empty - buffer
     if(len > UARTBUFSZ) len = UARTBUFSZ;
-    mymemcpy((char*)tbuf[tbufno], str + rest, len);
+    memcpy((char*)tbuf[tbufno], str + rest, len);
     txlen[tbufno] = len;
     return rest + len;
 }