Import of the watch repository from Pebble

platform/snowy/boot/src/drivers/dbgserial.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+void dbgserial_init(void);
+
+void dbgserial_putchar(uint8_t c);
+
+//! Version of dbgserial_putchar that may return before the character is finished writing.
+//! Use if you don't need a guarantee that your character will be written.
+void dbgserial_putchar_lazy(uint8_t c);
+
+void dbgserial_putstr(const char* str);
+
+//! Like dbgserial_putstr, but without a terminating newline
+void dbgserial_print(const char* str);
+
+void dbgserial_print_hex(uint32_t value);
+
+void dbgserial_putstr_fmt(char* buffer, unsigned int buffer_size, const char* fmt, ...)
+    __attribute__((format(printf, 3, 4)));