Add: printf() could be used in non-global-constructor functions when debug=On

Author: turmary

boards.txt

@@ -82,7 +82,7 @@ seeed_wio_terminal.menu.usbstack.tinyusb=TinyUSB
 seeed_wio_terminal.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
 seeed_wio_terminal.menu.debug.off=Off
 seeed_wio_terminal.menu.debug.on=On
-seeed_wio_terminal.menu.debug.on.build.flags.debug=-g
+seeed_wio_terminal.menu.debug.on.build.flags.debug=-g -DDEBUG=1
 
 # Seeed Femto M0 (SAMD21)
 # ------------------------------
@@ -118,7 +118,7 @@ Seeed_femto_m0.menu.usbstack.tinyusb=TinyUSB
 Seeed_femto_m0.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
 Seeed_femto_m0.menu.debug.off=Off
 Seeed_femto_m0.menu.debug.on=On
-Seeed_femto_m0.menu.debug.on.build.flags.debug=-g
+Seeed_femto_m0.menu.debug.on.build.flags.debug=-g -DDEBUG=1
 
 # Seeed XIAO M0 (SAMD21)
 # ------------------------------
@@ -154,7 +154,7 @@ seeed_XIAO_m0.menu.usbstack.tinyusb=TinyUSB
 seeed_XIAO_m0.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
 seeed_XIAO_m0.menu.debug.off=Off
 seeed_XIAO_m0.menu.debug.on=On
-seeed_XIAO_m0.menu.debug.on.build.flags.debug=-g
+seeed_XIAO_m0.menu.debug.on.build.flags.debug=-g -DDEBUG=1
 
 
 # Seeed XIAO M0 (SAMD21)
@@ -191,7 +191,7 @@ Wio_Lite_MG126.menu.usbstack.tinyusb=TinyUSB
 Wio_Lite_MG126.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
 Wio_Lite_MG126.menu.debug.off=Off
 Wio_Lite_MG126.menu.debug.on=On
-Wio_Lite_MG126.menu.debug.on.build.flags.debug=-g
+Wio_Lite_MG126.menu.debug.on.build.flags.debug=-g -DDEBUG=1
 
 
 # Wio GPS Board
@@ -228,7 +228,7 @@ WioGPS.menu.usbstack.tinyusb=TinyUSB
 WioGPS.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
 WioGPS.menu.debug.off=Off
 WioGPS.menu.debug.on=On
-WioGPS.menu.debug.on.build.flags.debug=-g
+WioGPS.menu.debug.on.build.flags.debug=-g -DDEBUG=1
 
 # Seeeduino Zero
 # ---------------------------------------
@@ -264,7 +264,7 @@ zero.menu.usbstack.tinyusb=TinyUSB
 zero.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
 zero.menu.debug.off=Off
 zero.menu.debug.on=On
-zero.menu.debug.on.build.flags.debug=-g
+zero.menu.debug.on.build.flags.debug=-g -DDEBUG=1
 
 # Seeeduino LoRaWAN
 # ---------------------------------------
@@ -300,7 +300,7 @@ rolawan.menu.usbstack.tinyusb=TinyUSB
 rolawan.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
 rolawan.menu.debug.off=Off
 rolawan.menu.debug.on=On
-rolawan.menu.debug.on.build.flags.debug=-g
+rolawan.menu.debug.on.build.flags.debug=-g -DDEBUG=1
 
 
 # Seeed Grove UI Wireless (SAMD51)
@@ -364,6 +364,6 @@ seeed_grove_ui_wireless.menu.usbstack.tinyusb=TinyUSB
 seeed_grove_ui_wireless.menu.usbstack.tinyusb.build.flags.usbstack=-DUSE_TINYUSB
 seeed_grove_ui_wireless.menu.debug.off=Off
 seeed_grove_ui_wireless.menu.debug.on=On
-seeed_grove_ui_wireless.menu.debug.on.build.flags.debug=-g
+seeed_grove_ui_wireless.menu.debug.on.build.flags.debug=-g -DDEBUG=1
 
 

cores/arduino/Retarget.cpp

@@ -55,15 +55,21 @@ extern int __real__write (int fd, const char *ptr, int len);
 int __wrap__write (int fd, const char *ptr, int len) {
 	(void)fd;	// UNUSED
 
-	int i;
+	#if defined(DEBUG) && DEBUG
+	static int serial_init = 0;
+	if (!serial_init) {
+		SERIAL_PORT_HARDWARE.begin(115200);
+		serial_init = 1;
+	}
 
-	if (!Serial) {
+	if (!SERIAL_PORT_HARDWARE) {
 		return len;
 	}
 
-	for (i = 0; i < len; i++) {
-		Serial.write(ptr[i]);
+	for (int i = 0; i < len; i++) {
+		SERIAL_PORT_HARDWARE.write(ptr[i]);
 	}
+	#endif
 	return len;
 }
 

platform.txt

@@ -47,7 +47,7 @@ compiler.objcopy.eep.flags=-O ihex -j .eeprom --set-section-flags=.eeprom=alloc,
 compiler.elf2hex.bin.flags=-O binary
 compiler.elf2hex.hex.flags=-O ihex -R .eeprom
 compiler.elf2hex.cmd=arm-none-eabi-objcopy
-compiler.ldflags=-mcpu={build.mcu} -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -u _printf_float -u _scanf_float
+compiler.ldflags=-mcpu={build.mcu} -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -u _printf_float -u _scanf_float -Wl,--wrap,_write -u __wrap__write
 compiler.size.cmd=arm-none-eabi-size
 compiler.define=-DARDUINO=
 compiler.readelf.cmd=arm-none-eabi-readelf