Refactor platform logic within print.h (#11863)

* Remove GCC check from debug

* Remove platform logic from common.mk

* Refactor platform logic within print.h

* restore debug.c format

* headers

* Rename function pointer type

* review comments

* Update tmk_core/common/printf.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Format

Co-authored-by: Nick Brassel <nick@tzarc.org>

13 files changed, 215 insertions, 252 deletions

diff --git a/tmk_core/common/print.c b/tmk_core/common/arm_atsam/_print.h
index 07aef0b0eb..a774f5d8d2 100644
--- a/tmk_core/common/print.c
+++ b/tmk_core/common/arm_atsam/_print.h
@@ -1,4 +1,4 @@
-/* Copyright 2012,2013 Jun Wako <wakojun@gmail.com> */
+/* Copyright 2012 Jun Wako <wakojun@gmail.com> */
 /* Very basic print functions, intended to be used with usb_debug_only.c
  * http://www.pjrc.com/teensy/
  * Copyright (c) 2008 PJRC.COM, LLC
@@ -21,27 +21,14 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+#pragma once
 
-#include <stdint.h>
-#include "print.h"
+#include "arm_atsam/printf.h"
 
-#ifndef NO_PRINT
-
-#    if defined(__AVR__)
-
-#        define sendchar(c) xputc(c)
-
-void print_set_sendchar(int8_t (*sendchar_func)(uint8_t)) { xdev_out(sendchar_func); }
-
-#    elif defined(PROTOCOL_CHIBIOS) /* __AVR__ */
-
-// don't need anything extra
-
-#    elif defined(__arm__) /* __AVR__ */
-
-// TODO
-// void print_set_sendchar(int8_t (*sendchar_func)(uint8_t)) { }
-
-#    endif /* __AVR__ */
-
-#endif
+// Create user & normal print defines
+#define xprintf(fmt, ...) __xprintf(fmt, ##__VA_ARGS__)
+#define print(s) xprintf(s)
+#define println(s) xprintf(s "\r\n")
+#define uprint(s) print(s)
+#define uprintln(s) println(s)
+#define uprintf(fmt, ...) xprintf(fmt, ##__VA_ARGS__)
diff --git a/tmk_core/common/arm_atsam/printf.c b/tmk_core/common/arm_atsam/printf.c
index cd7cdb52e6..2cb59706a8 100644
--- a/tmk_core/common/arm_atsam/printf.c
+++ b/tmk_core/common/arm_atsam/printf.c
@@ -15,11 +15,13 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include "printf.h"
+#include "sendchar.h"
+
 #ifdef CONSOLE_ENABLE
 
 #    include "samd51j18a.h"
 #    include "arm_atsam_protocol.h"
-#    include "printf.h"
 #    include <string.h>
 #    include <stdarg.h>
 
@@ -66,3 +68,5 @@ void console_printf(char *fmt, ...) {
 }
 
 #endif  // CONSOLE_ENABLE
+
+void print_set_sendchar(sendchar_func_t send) {}
\ No newline at end of file
diff --git a/tmk_core/common/arm_atsam/printf.mk b/tmk_core/common/arm_atsam/printf.mk
new file mode 100644
index 0000000000..f70e02731f
--- /dev/null
+++ b/tmk_core/common/arm_atsam/printf.mk
@@ -0,0 +1 @@
+TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/printf.c
diff --git a/tmk_core/common/avr/_print.h b/tmk_core/common/avr/_print.h
new file mode 100644
index 0000000000..f9b79bdf85
--- /dev/null
+++ b/tmk_core/common/avr/_print.h
@@ -0,0 +1,33 @@
+/* Copyright 2012 Jun Wako <wakojun@gmail.com> */
+/* Very basic print functions, intended to be used with usb_debug_only.c
+ * http://www.pjrc.com/teensy/
+ * Copyright (c) 2008 PJRC.COM, LLC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#pragma once
+
+#include "avr/xprintf.h"
+
+// Create user & normal print defines
+#define print(s) xputs(PSTR(s))
+#define println(s) xputs(PSTR(s "\r\n"))
+#define uprint(s) print(s)
+#define uprintln(s) println(s)
+#define uprintf(fmt, ...) xprintf(fmt, ##__VA_ARGS__)
\ No newline at end of file
diff --git a/tmk_core/common/avr/printf.c b/tmk_core/common/avr/printf.c
new file mode 100644
index 0000000000..9ad7a38693
--- /dev/null
+++ b/tmk_core/common/avr/printf.c
@@ -0,0 +1,20 @@
+/*
+Copyright 2011 Jun Wako <wakojun@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
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "xprintf.h"
+#include "sendchar.h"
+
+void print_set_sendchar(sendchar_func_t func) { xdev_out(func); }
diff --git a/tmk_core/common/avr/printf.mk b/tmk_core/common/avr/printf.mk
new file mode 100644
index 0000000000..060ad88c57
--- /dev/null
+++ b/tmk_core/common/avr/printf.mk
@@ -0,0 +1,2 @@
+TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/xprintf.S
+TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/printf.c
diff --git a/tmk_core/common/debug.c b/tmk_core/common/debug.c
index bea96dfc14..ea62deaa8c 100644
--- a/tmk_core/common/debug.c
+++ b/tmk_core/common/debug.c
@@ -1,24 +1,25 @@
-#include <stdbool.h>
-#include "debug.h"
+/*
+Copyright 2011 Jun Wako <wakojun@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
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
 
-#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "debug.h"
 
 debug_config_t debug_config = {
-/* GCC Bug 10676 - Using unnamed fields in initializers
- * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10676 */
-#if GCC_VERSION >= 40600
-    .enable   = false,
-    .matrix   = false,
-    .keyboard = false,
-    .mouse    = false,
-    .reserved = 0
-#else
-    {
-        false,  // .enable
-        false,  // .matrix
-        false,  // .keyboard
-        false,  // .mouse
-        0       // .reserved
-    }
-#endif
+    .enable   = false,  //
+    .matrix   = false,  //
+    .keyboard = false,  //
+    .mouse    = false,  //
+    .reserved = 0       //
 };
diff --git a/tmk_core/common/keyboard.c b/tmk_core/common/keyboard.c
index a6bde9df85..299bda2c12 100644
--- a/tmk_core/common/keyboard.c
+++ b/tmk_core/common/keyboard.c
@@ -229,6 +229,7 @@ void keyboard_setup(void) {
 #ifndef NO_JTAG_DISABLE
     disable_jtag();
 #endif
+    print_set_sendchar(sendchar);
     matrix_setup();
     keyboard_pre_init_kb();
 }
diff --git a/tmk_core/common/lib_printf.mk b/tmk_core/common/lib_printf.mk
new file mode 100644
index 0000000000..10d2d8468d
--- /dev/null
+++ b/tmk_core/common/lib_printf.mk
@@ -0,0 +1,9 @@
+PRINTF_PATH = $(LIB_PATH)/printf
+
+TMK_COMMON_SRC += $(PRINTF_PATH)/printf.c
+TMK_COMMON_SRC += $(COMMON_DIR)/printf.c
+TMK_COMMON_DEFS += -DPRINTF_DISABLE_SUPPORT_FLOAT
+TMK_COMMON_DEFS += -DPRINTF_DISABLE_SUPPORT_EXPONENTIAL
+TMK_COMMON_DEFS += -DPRINTF_DISABLE_SUPPORT_LONG_LONG
+TMK_COMMON_DEFS += -DPRINTF_DISABLE_SUPPORT_PTRDIFF_T
+VPATH += $(PRINTF_PATH)
diff --git a/tmk_core/common/print.h b/tmk_core/common/print.h
index 35fcad0f40..48f91e6342 100644
--- a/tmk_core/common/print.h
+++ b/tmk_core/common/print.h
@@ -27,104 +27,76 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "util.h"
+#include "sendchar.h"
+#include "progmem.h"
 
-#if defined(PROTOCOL_CHIBIOS) || defined(PROTOCOL_ARM_ATSAM)
-#    define PSTR(x) x
-#endif
+void print_set_sendchar(sendchar_func_t func);
 
 #ifndef NO_PRINT
-
-#    if defined(__AVR__) /* __AVR__ */
-
-#        include "avr/xprintf.h"
-
-#        ifdef USER_PRINT /* USER_PRINT */
-
-// Remove normal print defines
-#            define print(s)
-#            define println(s)
-#            undef xprintf
-#            define xprintf(fmt, ...)
-
-// Create user print defines
-#            define uprint(s) xputs(PSTR(s))
-#            define uprintln(s) xputs(PSTR(s "\r\n"))
-#            define uprintf(fmt, ...) __xprintf(PSTR(fmt), ##__VA_ARGS__)
-
-#        else /* NORMAL PRINT */
-
-// Create user & normal print defines
-#            define print(s) xputs(PSTR(s))
-#            define println(s) xputs(PSTR(s "\r\n"))
-#            define uprint(s) print(s)
-#            define uprintln(s) println(s)
-#            define uprintf(fmt, ...) xprintf(fmt, ##__VA_ARGS__)
-
-#        endif /* USER_PRINT / NORMAL PRINT */
-
-#        ifdef __cplusplus
-extern "C"
-#        endif
-
-    /* function pointer of sendchar to be used by print utility */
-    void print_set_sendchar(int8_t (*print_sendchar_func)(uint8_t));
-
-#    elif defined(PROTOCOL_CHIBIOS) /* PROTOCOL_CHIBIOS */
-
+#    if __has_include_next("_print.h")
+#        include_next "_print.h" /* Include the platforms print.h */
+#    else
+// Fall back to lib/printf
 #        include "printf.h"  // lib/printf/printf.h
 
-#        ifdef USER_PRINT /* USER_PRINT */
-
-// Remove normal print defines
-#            define print(s)
-#            define println(s)
-#            define xprintf(fmt, ...)
-
-// Create user print defines
-#            define uprint(s) printf(s)
-#            define uprintln(s) printf(s "\r\n")
-#            define uprintf printf
-
-#        else /* NORMAL PRINT */
 // Create user & normal print defines
-#            define print(s) printf(s)
-#            define println(s) printf(s "\r\n")
-#            define xprintf printf
-#            define uprint(s) printf(s)
-#            define uprintln(s) printf(s "\r\n")
-#            define uprintf printf
-
-#        endif /* USER_PRINT / NORMAL PRINT */
-
-#    elif defined(PROTOCOL_ARM_ATSAM) /* PROTOCOL_ARM_ATSAM */
+#        define print(s) printf(s)
+#        define println(s) printf(s "\r\n")
+#        define xprintf printf
+#        define uprint(s) printf(s)
+#        define uprintln(s) printf(s "\r\n")
+#        define uprintf printf
 
-#        include "arm_atsam/printf.h"
+#    endif /* __AVR__ / PROTOCOL_CHIBIOS / PROTOCOL_ARM_ATSAM */
+#else      /* NO_PRINT */
+#    undef xprintf
+// Remove print defines
+#    define print(s)
+#    define println(s)
+#    define xprintf(fmt, ...)
+#    define uprintf(fmt, ...)
+#    define uprint(s)
+#    define uprintln(s)
 
-#        ifdef USER_PRINT /* USER_PRINT */
+#endif /* NO_PRINT */
 
+#ifdef USER_PRINT
 // Remove normal print defines
-#            define print(s)
-#            define println(s)
-#            define xprintf(fmt, ...)
-
-// Create user print defines
-#            define uprintf(fmt, ...) __xprintf(fmt, ##__VA_ARGS__)
-#            define uprint(s) xprintf(s)
-#            define uprintln(s) xprintf(s "\r\n")
-
-#        else /* NORMAL PRINT */
-
-// Create user & normal print defines
-#            define xprintf(fmt, ...) __xprintf(fmt, ##__VA_ARGS__)
-#            define print(s) xprintf(s)
-#            define println(s) xprintf(s "\r\n")
-#            define uprint(s) print(s)
-#            define uprintln(s) println(s)
-#            define uprintf(fmt, ...) xprintf(fmt, ##__VA_ARGS__)
-
-#        endif /* USER_PRINT / NORMAL PRINT */
+#    undef print
+#    undef println
+#    undef xprintf
+#    define print(s)
+#    define println(s)
+#    define xprintf(fmt, ...)
+#endif
 
-#    endif /* __AVR__ / PROTOCOL_CHIBIOS / PROTOCOL_ARM_ATSAM */
+#define print_dec(i) xprintf("%u", i)
+#define print_decs(i) xprintf("%d", i)
+/* hex */
+#define print_hex4(i) xprintf("%X", i)
+#define print_hex8(i) xprintf("%02X", i)
+#define print_hex16(i) xprintf("%04X", i)
+#define print_hex32(i) xprintf("%08lX", i)
+/* binary */
+#define print_bin4(i) xprintf("%04b", i)
+#define print_bin8(i) xprintf("%08b", i)
+#define print_bin16(i) xprintf("%016b", i)
+#define print_bin32(i) xprintf("%032lb", i)
+#define print_bin_reverse8(i) xprintf("%08b", bitrev(i))
+#define print_bin_reverse16(i) xprintf("%016b", bitrev16(i))
+#define print_bin_reverse32(i) xprintf("%032lb", bitrev32(i))
+/* print value utility */
+#define print_val_dec(v) xprintf(#v ": %u\n", v)
+#define print_val_decs(v) xprintf(#v ": %d\n", v)
+#define print_val_hex8(v) xprintf(#v ": %X\n", v)
+#define print_val_hex16(v) xprintf(#v ": %02X\n", v)
+#define print_val_hex32(v) xprintf(#v ": %04lX\n", v)
+#define print_val_bin8(v) xprintf(#v ": %08b\n", v)
+#define print_val_bin16(v) xprintf(#v ": %016b\n", v)
+#define print_val_bin32(v) xprintf(#v ": %032lb\n", v)
+#define print_val_bin_reverse8(v) xprintf(#v ": %08b\n", bitrev(v))
+#define print_val_bin_reverse16(v) xprintf(#v ": %016b\n", bitrev16(v))
+#define print_val_bin_reverse32(v) xprintf(#v ": %032lb\n", bitrev32(v))
 
 // User print disables the normal print messages in the body of QMK/TMK code and
 // is meant as a lightweight alternative to NOPRINT. Use it when you only want to do
@@ -132,129 +104,32 @@ extern "C"
 // print (and store their wasteful strings).
 //
 // !!! DO NOT USE USER PRINT CALLS IN THE BODY OF QMK/TMK !!!
-//
-#    ifdef USER_PRINT
-
-// Disable normal print
-#        define print_dec(data)
-#        define print_decs(data)
-#        define print_hex4(data)
-#        define print_hex8(data)
-#        define print_hex16(data)
-#        define print_hex32(data)
-#        define print_bin4(data)
-#        define print_bin8(data)
-#        define print_bin16(data)
-#        define print_bin32(data)
-#        define print_bin_reverse8(data)
-#        define print_bin_reverse16(data)
-#        define print_bin_reverse32(data)
-#        define print_val_dec(v)
-#        define print_val_decs(v)
-#        define print_val_hex8(v)
-#        define print_val_hex16(v)
-#        define print_val_hex32(v)
-#        define print_val_bin8(v)
-#        define print_val_bin16(v)
-#        define print_val_bin32(v)
-#        define print_val_bin_reverse8(v)
-#        define print_val_bin_reverse16(v)
-#        define print_val_bin_reverse32(v)
-
-#    else /* NORMAL_PRINT */
 
-// Enable normal print
 /* decimal */
-#        define print_dec(i) xprintf("%u", i)
-#        define print_decs(i) xprintf("%d", i)
+#define uprint_dec(i) uprintf("%u", i)
+#define uprint_decs(i) uprintf("%d", i)
 /* hex */
-#        define print_hex4(i) xprintf("%X", i)
-#        define print_hex8(i) xprintf("%02X", i)
-#        define print_hex16(i) xprintf("%04X", i)
-#        define print_hex32(i) xprintf("%08lX", i)
+#define uprint_hex4(i) uprintf("%X", i)
+#define uprint_hex8(i) uprintf("%02X", i)
+#define uprint_hex16(i) uprintf("%04X", i)
+#define uprint_hex32(i) uprintf("%08lX", i)
 /* binary */
-#        define print_bin4(i) xprintf("%04b", i)
-#        define print_bin8(i) xprintf("%08b", i)
-#        define print_bin16(i) xprintf("%016b", i)
-#        define print_bin32(i) xprintf("%032lb", i)
-#        define print_bin_reverse8(i) xprintf("%08b", bitrev(i))
-#        define print_bin_reverse16(i) xprintf("%016b", bitrev16(i))
-#        define print_bin_reverse32(i) xprintf("%032lb", bitrev32(i))
+#define uprint_bin4(i) uprintf("%04b", i)
+#define uprint_bin8(i) uprintf("%08b", i)
+#define uprint_bin16(i) uprintf("%016b", i)
+#define uprint_bin32(i) uprintf("%032lb", i)
+#define uprint_bin_reverse8(i) uprintf("%08b", bitrev(i))
+#define uprint_bin_reverse16(i) uprintf("%016b", bitrev16(i))
+#define uprint_bin_reverse32(i) uprintf("%032lb", bitrev32(i))
 /* print value utility */
-#        define print_val_dec(v) xprintf(#        v ": %u\n", v)
-#        define print_val_decs(v) xprintf(#        v ": %d\n", v)
-#        define print_val_hex8(v) xprintf(#        v ": %X\n", v)
-#        define print_val_hex16(v) xprintf(#        v ": %02X\n", v)
-#        define print_val_hex32(v) xprintf(#        v ": %04lX\n", v)
-#        define print_val_bin8(v) xprintf(#        v ": %08b\n", v)
-#        define print_val_bin16(v) xprintf(#        v ": %016b\n", v)
-#        define print_val_bin32(v) xprintf(#        v ": %032lb\n", v)
-#        define print_val_bin_reverse8(v) xprintf(#        v ": %08b\n", bitrev(v))
-#        define print_val_bin_reverse16(v) xprintf(#        v ": %016b\n", bitrev16(v))
-#        define print_val_bin_reverse32(v) xprintf(#        v ": %032lb\n", bitrev32(v))
-
-#    endif /* USER_PRINT / NORMAL_PRINT */
-
-// User Print
-
-/* decimal */
-#    define uprint_dec(i) uprintf("%u", i)
-#    define uprint_decs(i) uprintf("%d", i)
-/* hex */
-#    define uprint_hex4(i) uprintf("%X", i)
-#    define uprint_hex8(i) uprintf("%02X", i)
-#    define uprint_hex16(i) uprintf("%04X", i)
-#    define uprint_hex32(i) uprintf("%08lX", i)
-/* binary */
-#    define uprint_bin4(i) uprintf("%04b", i)
-#    define uprint_bin8(i) uprintf("%08b", i)
-#    define uprint_bin16(i) uprintf("%016b", i)
-#    define uprint_bin32(i) uprintf("%032lb", i)
-#    define uprint_bin_reverse8(i) uprintf("%08b", bitrev(i))
-#    define uprint_bin_reverse16(i) uprintf("%016b", bitrev16(i))
-#    define uprint_bin_reverse32(i) uprintf("%032lb", bitrev32(i))
-/* print value utility */
-#    define uprint_val_dec(v) uprintf(#    v ": %u\n", v)
-#    define uprint_val_decs(v) uprintf(#    v ": %d\n", v)
-#    define uprint_val_hex8(v) uprintf(#    v ": %X\n", v)
-#    define uprint_val_hex16(v) uprintf(#    v ": %02X\n", v)
-#    define uprint_val_hex32(v) uprintf(#    v ": %04lX\n", v)
-#    define uprint_val_bin8(v) uprintf(#    v ": %08b\n", v)
-#    define uprint_val_bin16(v) uprintf(#    v ": %016b\n", v)
-#    define uprint_val_bin32(v) uprintf(#    v ": %032lb\n", v)
-#    define uprint_val_bin_reverse8(v) uprintf(#    v ": %08b\n", bitrev(v))
-#    define uprint_val_bin_reverse16(v) uprintf(#    v ": %016b\n", bitrev16(v))
-#    define uprint_val_bin_reverse32(v) uprintf(#    v ": %032lb\n", bitrev32(v))
-
-#else /* NO_PRINT */
-
-#    define xprintf(fmt, ...)
-#    define print(s)
-#    define println(s)
-#    define print_set_sendchar(func)
-#    define print_dec(data)
-#    define print_decs(data)
-#    define print_hex4(data)
-#    define print_hex8(data)
-#    define print_hex16(data)
-#    define print_hex32(data)
-#    define print_bin4(data)
-#    define print_bin8(data)
-#    define print_bin16(data)
-#    define print_bin32(data)
-#    define print_bin_reverse8(data)
-#    define print_bin_reverse16(data)
-#    define print_bin_reverse32(data)
-#    define print_val_dec(v)
-#    define print_val_decs(v)
-#    define print_val_hex8(v)
-#    define print_val_hex16(v)
-#    define print_val_hex32(v)
-#    define print_val_bin8(v)
-#    define print_val_bin16(v)
-#    define print_val_bin32(v)
-#    define print_val_bin_reverse8(v)
-#    define print_val_bin_reverse16(v)
-#    define print_val_bin_reverse32(v)
-
-#endif /* NO_PRINT */
+#define uprint_val_dec(v) uprintf(#v ": %u\n", v)
+#define uprint_val_decs(v) uprintf(#v ": %d\n", v)
+#define uprint_val_hex8(v) uprintf(#v ": %X\n", v)
+#define uprint_val_hex16(v) uprintf(#v ": %02X\n", v)
+#define uprint_val_hex32(v) uprintf(#v ": %04lX\n", v)
+#define uprint_val_bin8(v) uprintf(#v ": %08b\n", v)
+#define uprint_val_bin16(v) uprintf(#v ": %016b\n", v)
+#define uprint_val_bin32(v) uprintf(#v ": %032lb\n", v)
+#define uprint_val_bin_reverse8(v) uprintf(#v ": %08b\n", bitrev(v))
+#define uprint_val_bin_reverse16(v) uprintf(#v ": %016b\n", bitrev16(v))
+#define uprint_val_bin_reverse32(v) uprintf(#v ": %032lb\n", bitrev32(v))
diff --git a/tmk_core/common/printf.c b/tmk_core/common/printf.c
new file mode 100644
index 0000000000..e8440e55ee
--- /dev/null
+++ b/tmk_core/common/printf.c
@@ -0,0 +1,27 @@
+/*
+Copyright 2011 Jun Wako <wakojun@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
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include <stddef.h>
+#include "sendchar.h"
+
+// bind lib/printf to console interface - sendchar
+
+static int8_t          null_sendchar_func(uint8_t c) { return 0; }
+static sendchar_func_t func = null_sendchar_func;
+
+void print_set_sendchar(sendchar_func_t send) { func = send; }
+
+void _putchar(char character) { func(character); }
diff --git a/tmk_core/common/progmem.h b/tmk_core/common/progmem.h
index c8863d3ad2..4e4771e523 100644
--- a/tmk_core/common/progmem.h
+++ b/tmk_core/common/progmem.h
@@ -4,6 +4,7 @@
 #    include <avr/pgmspace.h>
 #else
 #    define PROGMEM
+#    define PSTR(x) x
 #    define PGM_P const char*
 #    define memcpy_P(dest, src, n) memcpy(dest, src, n)
 #    define pgm_read_byte(address_short) *((uint8_t*)(address_short))
diff --git a/tmk_core/common/sendchar.h b/tmk_core/common/sendchar.h
index b150dd464e..edcddaa6bb 100644
--- a/tmk_core/common/sendchar.h
+++ b/tmk_core/common/sendchar.h
@@ -23,6 +23,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 extern "C" {
 #endif
 
+typedef int8_t (*sendchar_func_t)(uint8_t c);
+
 /* transmit a character.  return 0 on success, -1 on error. */
 int8_t sendchar(uint8_t c);