1 files changed, 163 insertions, 0 deletions
diff --git a/hw/boards/printf_retarget.c b/hw/boards/printf_retarget.c
new file mode 100644
index 000000000..ecd284ec7
--- /dev/null
+++ b/hw/boards/printf_retarget.c
@@ -0,0 +1,163 @@
+/**************************************************************************/
+/*!
+    @file     printf_retarget.c
+    @author   hathach (tinyusb.org)
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2013, hathach (tinyusb.org)
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+    This file is part of the tinyusb stack.
+*/
+/**************************************************************************/
+
+#include "board.h"
+
+#if CFG_PRINTF_TARGET != PRINTF_TARGET_SEMIHOST
+
+#if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
+  #define retarget_getchar()     board_uart_getchar()
+  #define retarget_putchar(c)    board_uart_putchar(c);
+#elif CFG_PRINTF_TARGET == PRINTF_TARGET_SWO
+  volatile int32_t ITM_RxBuffer;  // keil variable to read from SWO
+	#define retarget_getchar()     ITM_ReceiveChar()
+	#define retarget_putchar(c)    ITM_SendChar(c)
+#else
+	#error Target is not implemented yet
+#endif
+
+//--------------------------------------------------------------------+
+// LPCXPRESSO / RED SUITE
+//--------------------------------------------------------------------+
+#if defined __CODE_RED
+
+#if CFG_PRINTF_TARGET == PRINTF_TARGET_SWO
+  #error author does not know how to retarget SWO with lpcxpresso/red-suite
+#endif
+
+// Called by bottom level of printf routine within RedLib C library to write
+// a character. With the default semihosting stub, this would write the character
+// to the debugger console window . But this version writes
+// the character to the UART.
+int __sys_write (int iFileHandle, char *buf, int length)
+{
+  (void) iFileHandle;
+
+  for (int i=0; i<length; i++)
+  {
+    if (buf[i] == '\n') retarget_putchar('\r');
+
+    retarget_putchar( buf[i] );
+  }
+
+  return length;
+}
+
+// Called by bottom level of scanf routine within RedLib C library to read
+// a character. With the default semihosting stub, this would read the character
+// from the debugger console window (which acts as stdin). But this version reads
+// the character from the UART.
+int __sys_readc (void)
+{
+	return (int) retarget_getchar();
+}
+
+//--------------------------------------------------------------------+
+// KEIL
+//--------------------------------------------------------------------+
+#elif defined __CC_ARM // keil
+
+struct __FILE {
+  uint32_t handle;
+};
+
+void _ttywrch(int ch)
+{
+  if ( ch == '\n' ) retarget_putchar('\r');
+
+  retarget_putchar(ch);
+}
+
+int fgetc(FILE *f)
+{
+  return retarget_getchar();
+}
+
+int fputc(int ch, FILE *f)
+{
+  _ttywrch(ch);
+  return ch;
+}
+
+//--------------------------------------------------------------------+
+// IAR
+//--------------------------------------------------------------------+
+#elif defined __ICCARM__ // TODO could not able to retarget to UART with IAR
+
+#if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
+#include <stddef.h>
+
+size_t __write(int handle, const unsigned char *buf, size_t length)
+{
+  /* Check for the command to flush all handles */
+  if (handle == -1) return 0;
+
+  /* Check for stdout and stderr (only necessary if FILE descriptors are enabled.) */
+  if (handle != 1 && handle != 2) return -1;
+
+  for (size_t i=0; i<length; i++)
+  {
+    if (buf[i] == '\n') retarget_putchar('\r');
+
+    retarget_putchar( buf[i] );
+  }
+
+  return length;
+}
+
+size_t __read(int handle, unsigned char *buf, size_t bufSize)
+{
+  /* Check for stdin (only necessary if FILE descriptors are enabled) */
+  if (handle != 0) return -1;
+
+  size_t i;
+  for (i=0; i<bufSize; i++)
+  {
+    uint8_t ch = board_uart_getchar();
+    if (ch == 0) break;
+    buf[i] = ch;
+  }
+
+  return i;
+}
+
+#endif
+
+#endif
+
+#endif // CFG_PRINTF_TARGET != PRINTF_TARGET_SEMIHOST