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/gcc/write.c b/sysmoOCTSIM/stdio_redirect/gcc/write.c
new file mode 100644
index 0000000..44fa815
--- /dev/null
+++ b/sysmoOCTSIM/stdio_redirect/gcc/write.c
@@ -0,0 +1,53 @@
+/**
+ * \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_io.h>
+#include <stdio.h>
+
+int __attribute__((weak)) _write(int file, char *ptr, int len); /* Remove GCC compiler warning */
+
+int __attribute__((weak)) _write(int file, char *ptr, int len)
+{
+ int n = 0;
+
+ if ((file != 1) && (file != 2) && (file != 3)) {
+ return -1;
+ }
+
+ n = stdio_io_write((const uint8_t *)ptr, len);
+ if (n < 0) {
+ return -1;
+ }
+
+ return n;
+}