From 3c1c8415713f80cd0919f7bd5244d292f1c3cfe1 Mon Sep 17 00:00:00 2001
From: Thomas Albers <thomas@thomaslabs.org>
Date: Tue, 8 Aug 2023 18:52:32 +0200
Subject: Initial commit

---
 zbootloader.h | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 zbootloader.h

(limited to 'zbootloader.h')

diff --git a/zbootloader.h b/zbootloader.h
new file mode 100644
index 0000000..2d1aff6
--- /dev/null
+++ b/zbootloader.h
@@ -0,0 +1,58 @@
+#ifndef ZBOOTLOADER_H
+#define ZBOOTLOADER_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <assert.h>
+
+#ifdef __GNUC__
+#define PACKED __attribute__((packed))
+#else
+#define PACKED
+#endif
+
+enum header_type {
+    CMD_PING,
+    CMD_INFO,
+    CMD_BOOT,
+    CMD_READ,
+    CMD_WRITE,
+    CMD_IO_READ,
+    CMD_IO_WRITE,
+    CMD_ECHO
+};
+
+struct header {
+    uint8_t type;
+    uint8_t bank;
+    uint16_t address;
+    uint16_t length;
+    uint16_t checksum;
+} PACKED;
+
+static_assert(sizeof(struct header) == 8, "struct header is not PACKED");
+
+enum ack {
+    ACK = 0x00,
+    NACK = 0xFF
+};
+
+enum error {
+    ERR_TIMEOUT = -1
+};
+
+#define LEN(x) ((size_t)(sizeof(x) / sizeof(x[0])))
+
+#define FIFO_LEN 32
+#define MAX_PACKET_SIZE 256
+#define TIMEOUT_MS 500
+#define MAX_ATTEMPTS 3
+#define MAX_TRANS_ATTEMPTS 5
+
+// static_assert(FIFO_LEN % 2 == 0, "FIFO_LEN is not a power of 2");
+
+uint16_t
+crc16(const void *buf, size_t len);
+
+#endif // ZBOOTLOADER_H
-- 
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