Switch SERCOM7 (Debug UART) to sync mode + add STDIO
this will allow us to do printf()
Change-Id: Ibf4ba961d4bbf8d787558f38f3d557422587aad3
diff --git a/sysmoOCTSIM/stdio_redirect/keil/Retarget.c b/sysmoOCTSIM/stdio_redirect/keil/Retarget.c
new file mode 100644
index 0000000..205e7e5
--- /dev/null
+++ b/sysmoOCTSIM/stdio_redirect/keil/Retarget.c
@@ -0,0 +1,107 @@
+/**
+ * \file
+ *
+ * \brief STDIO redirection
+ *
+ * Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <stdio.h>
+
+#ifdef _UNIT_TEST_
+#undef fputc
+#undef fgetc
+#undef ferror
+#define fputc ut_fputc
+#define fgetc ut_fgetc
+#define ferror ut_ferror
+#endif
+
+#include <stdio_io.h>
+
+/* Disable semihosting */
+#if defined(__GNUC__) && (__ARMCOMPILER_VERSION > 6000000) /* Keil MDK with ARM Compiler 6 */
+__asm(".global __use_no_semihosting\n\t");
+#else
+#pragma import(__use_no_semihosting_swi)
+#endif
+
+#ifndef __GNUC__
+struct __FILE {
+ int handle;
+};
+#endif
+FILE __stdout;
+FILE __stdin;
+FILE __stderr;
+
+int fputc(int ch, FILE *f)
+{
+ if ((f == stdout) || (f == stderr)) {
+ uint8_t tmp = (uint8_t)ch;
+ if (stdio_io_write(&tmp, 1) < 0) {
+ return EOF;
+ }
+ return ch;
+ } else {
+ return EOF;
+ }
+}
+
+int fgetc(FILE *f)
+{
+ if (f == stdin) {
+ uint8_t tmp = 0;
+ if (stdio_io_read(&tmp, 1) < 0) {
+ return EOF;
+ }
+ return tmp;
+ } else {
+ return EOF;
+ }
+}
+
+void _ttywrch(int ch)
+{
+ uint8_t tmp = (uint8_t)ch;
+ stdio_io_write(&tmp, 1);
+}
+
+int ferror(FILE *f)
+{
+ (void)f;
+ /* Your implementation of ferror */
+ return EOF;
+}
+
+void _sys_exit(int return_code)
+{
+ (void)return_code;
+ while (1) {
+ }; /* endless loop */
+}