test build of 'Host shield' in minimal env.

common/debug.h

@@ -18,19 +18,28 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef DEBUG_H
 #define DEBUG_H 1
 
+#include <stdbool.h>
 #include "print.h"
 
 
-#define debug(s)             if(debug_enable) print(s)
+#define debug(s)             if(debug_enable) print_P(PSTR(s))
 #define debug_hex(c)         if(debug_enable) phex(c)
 #define debug_hex16(i)       if(debug_enable) phex16(i)
 #define debug_bin(c)         if(debug_enable) pbin(c)
 #define debug_bin_reverse(c) if(debug_enable) pbin_reverse(c)
 
 
-bool debug_enable;
-bool debug_matrix;
-bool debug_keyboard;
-bool debug_mouse;
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern bool debug_enable;
+extern bool debug_matrix;
+extern bool debug_keyboard;
+extern bool debug_mouse;
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif

common/host.h

@@ -23,6 +23,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "host_driver.h"
 
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef NKRO_ENABLE
 extern bool keyboard_nkro;
 #endif
@@ -54,4 +58,8 @@ void host_mouse_send(report_mouse_t *report);
 void host_system_send(uint16_t data);
 void host_consumer_send(uint16_t data);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

common/keyboard.h

@@ -21,8 +21,14 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <stdint.h>
 
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 void keyboard_init(void);
 void keyboard_proc(void);
 void keyboard_set_leds(uint8_t leds);
+#ifdef __cplusplus
+}
+#endif
 
 #endif

common/print.h

@@ -29,11 +29,17 @@
 #include <avr/pgmspace.h>
 
 
-extern bool print_enable;
-
+// avoid collision with arduino/Print.h
+#ifndef __cplusplus
 // this macro allows you to write print("some text") and
 // the string is automatically placed into flash memory :)
 #define print(s) print_P(PSTR(s))
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern bool print_enable;
 
 void print_S(const char *s);
 void print_P(const char *s);
@@ -41,5 +47,8 @@ void phex(unsigned char c);
 void phex16(unsigned int i);
 void pbin(unsigned char c);
 void pbin_reverse(unsigned char c);
+#ifdef __cplusplus
+}
+#endif
 
 #endif

common/sendchar.h

@@ -21,7 +21,15 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <stdint.h>
 
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* transmit a character.  return 0 on success, -1 on error. */
 int8_t sendchar(uint8_t c);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

common/timer.h

@@ -23,10 +23,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef TIMER_PRESCALER
 #   if F_CPU > 16000000
 #       define TIMER_PRESCALER      256
-#   elif F_CPU >= 4000000
+#   elif F_CPU > 2000000
 #       define TIMER_PRESCALER      64
-#   else
+#   elif F_CPU > 250000
 #       define TIMER_PRESCALER      8
+#   else
+#       define TIMER_PRESCALER      1
 #   endif
 #endif
 #define TIMER_RAW_FREQ      (F_CPU/TIMER_PRESCALER)
@@ -42,6 +44,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define TIMER_DIFF_MS(a, b)     TIMER_DIFF(a, b, UINT16_MAX)
 
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 extern volatile uint16_t timer_count;
 
 
@@ -49,5 +54,8 @@ void timer_init(void);
 void timer_clear(void);
 uint16_t timer_read(void);
 uint16_t timer_elapsed(uint16_t last);
+#ifdef __cplusplus
+}
+#endif
 
 #endif