[nrf52] First commit for platform support

platform/nrf52xxx/debug.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2016 Eric Holland
+ *
+ * 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.
+ */
+#include <stdarg.h>
+#include <reg.h>
+#include <debug.h>
+#include <stdio.h>
+#include <kernel/thread.h>
+#include <dev/uart.h>
+#include <arch/ops.h>
+#include <arch/arm/cm.h>
+#include <platform/debug.h>
+#include <target/debugconfig.h>
+
+
+
+void nrf52_debug_early_init(void)
+{
+    uart_init_early();
+}
+
+/* later in the init process */
+void nrf52_debug_init(void)
+{
+    uart_init();
+}
+
+
+
+void platform_dputc(char c)
+{
+    if (c == '\n')
+        uart_putc(DEBUG_UART, '\r');
+    uart_putc(DEBUG_UART, c);
+}
+
+int platform_dgetc(char *c, bool wait)
+{
+    int ret = uart_getc(DEBUG_UART, wait);
+    if (ret == -1)
+        return -1;
+    *c = ret;
+    return 0;
+}
+