Minor code size reduction. Adding some const correctness.

src/main/common/printf.c

@@ -69,7 +69,7 @@ static void putchw(void *putp, putcf putf, int n, char z, char *bf)
         putf(putp, ch);
 }
 
-void tfp_format(void *putp, putcf putf, char *fmt, va_list va)
+void tfp_format(void *putp, putcf putf, const char *fmt, va_list va)
 {
     char bf[12];
 
@@ -154,7 +154,7 @@ void init_printf(void *putp, void (*putf) (void *, char))
     stdout_putp = putp;
 }
 
-void tfp_printf(char *fmt, ...)
+void tfp_printf(const char *fmt, ...)
 {
     va_list va;
     va_start(va, fmt);
@@ -168,7 +168,7 @@ static void putcp(void *p, char c)
     *(*((char **) p))++ = c;
 }
 
-void tfp_sprintf(char *s, char *fmt, ...)
+void tfp_sprintf(char *s, const char *fmt, ...)
 {
     va_list va;
 

src/main/common/printf.h

@@ -107,10 +107,10 @@ regs Kusti, 23.10.2004
 
 void init_printf(void *putp, void (*putf) (void *, char));
 
-void tfp_printf(char *fmt, ...);
-void tfp_sprintf(char *s, char *fmt, ...);
+void tfp_printf(const char *fmt, ...);
+void tfp_sprintf(char *s, const char *fmt, ...);
 
-void tfp_format(void *putp, void (*putf) (void *, char), char *fmt, va_list va);
+void tfp_format(void *putp, void (*putf) (void *, char), const char *fmt, va_list va);
 
 #define printf tfp_printf
 #define sprintf tfp_sprintf

src/main/common/typeconversion.c

@@ -90,7 +90,7 @@ int a2d(char ch)
         return -1;
 }
 
-char a2i(char ch, char **src, int base, int *nump)
+char a2i(char ch, const char **src, int base, int *nump)
 {
     char *p = *src;
     int num = 0;

src/main/common/typeconversion.h

@@ -20,7 +20,7 @@ void uli2a(unsigned long int num, unsigned int base, int uc, char *bf);
 void li2a(long num, char *bf);
 void ui2a(unsigned int num, unsigned int base, int uc, char *bf);
 void i2a(int num, char *bf);
-char a2i(char ch, char **src, int base, int *nump);
+char a2i(char ch, const char **src, int base, int *nump);
 char *ftoa(float x, char *floatString);
 float fastA2F(const char *p);
 

src/main/io/display.c

@@ -378,24 +378,28 @@ void showBatteryPage(void)
 void showSensorsPage(void)
 {
     uint8_t rowIndex = PAGE_TITLE_LINE_COUNT;
+    static const char *format = "%c = %5d %5d %5d";
 
     i2c_OLED_set_line(rowIndex++);
     i2c_OLED_send_string("        X     Y     Z");
+
     if (sensors(SENSOR_ACC)) {
-        tfp_sprintf(lineBuffer, "A = %5d %5d %5d", accSmooth[X], accSmooth[Y], accSmooth[Z]);
+        tfp_sprintf(lineBuffer, format, 'A', accSmooth[X], accSmooth[Y], accSmooth[Z]);
         padLineBuffer();
         i2c_OLED_set_line(rowIndex++);
         i2c_OLED_send_string(lineBuffer);
     }
+
     if (sensors(SENSOR_GYRO)) {
-        tfp_sprintf(lineBuffer, "G = %5d %5d %5d", gyroADC[X], gyroADC[Y], gyroADC[Z]);
+        tfp_sprintf(lineBuffer, format, 'G', gyroADC[X], gyroADC[Y], gyroADC[Z]);
         padLineBuffer();
         i2c_OLED_set_line(rowIndex++);
         i2c_OLED_send_string(lineBuffer);
     }
+
 #ifdef MAG
     if (sensors(SENSOR_MAG)) {
-        tfp_sprintf(lineBuffer, "M = %5d %5d %5d", magADC[X], magADC[Y], magADC[Z]);
+        tfp_sprintf(lineBuffer, format, 'M', magADC[X], magADC[Y], magADC[Z]);
         padLineBuffer();
         i2c_OLED_set_line(rowIndex++);
         i2c_OLED_send_string(lineBuffer);