From b50e1f74202e18ea10f1f2cd46e9e02a9d4f0e65 Mon Sep 17 00:00:00 2001
From: Thomas Albers <thomas@thomaslabs.org>
Date: Sun, 6 Aug 2023 10:01:18 +0200
Subject: Rewrite for new serial protocol

---
 zup.h | 128 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 zup.h

(limited to 'zup.h')

diff --git a/zup.h b/zup.h
new file mode 100644
index 0000000..cce84ed
--- /dev/null
+++ b/zup.h
@@ -0,0 +1,128 @@
+#ifndef ZUP_H
+#define ZUP_H
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <assert.h>
+
+#include <termios.h>
+
+#define LEN(x) (sizeof(x) / sizeof(x[0]))
+
+enum error {
+    ERR_TIMEOUT = -1,
+    ERR_READ = -2,
+    ERR_WRITE = -3,
+    ERR_NACK = -4,
+    ERR_ARGS = -5
+};
+
+struct param {
+    char port[32];
+    speed_t baud;
+    unsigned int repl : 1;
+    unsigned int human_readable : 1;
+    unsigned int verbose : 2;
+};
+
+#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
+};
+
+static inline int
+max(int x, int y)
+{
+    return x > y ? x : y;
+}
+
+static inline int
+min(int x, int y)
+{
+    return x > y ? y : x;
+}
+
+extern int verbose;
+
+static inline void
+msg(int level, const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    if (verbose >= level) {
+        fprintf(stderr, "DEBUG [%d]: ", level);
+        vfprintf(stderr, fmt, ap);
+    }
+    va_end(ap);
+}
+
+uint16_t
+crc16(const void *buf, size_t len);
+
+int
+z_boot(int fd, uint8_t bank, uint16_t address);
+
+int
+z_read(int fd, uint8_t bank, uint16_t address, uint16_t length, uint8_t *buf);
+
+int
+z_write(int fd, uint8_t bank, uint16_t address, uint16_t length,
+        const uint8_t *buf);
+
+int
+z_echo(int fd, uint16_t length, uint8_t *buf);
+
+int
+open_tty(const char *port, int baud);
+
+int
+run_commands(int fd, const struct param *param, int ncmd, char **cmds);
+
+void
+repl(int fd, struct param *param);
+
+void
+print_error(int error);
+
+void
+hexdump(size_t start_address, size_t len, const uint8_t *buf);
+
+#define MAX_ARGS 5
+#define MAX_PACKET_SIZE 256
+#define MAX_ATTEMPTS 3
+#define MAX_TRANS_ATTEMPTS 5
+
+#define VERSION "1.0.0"
+
+#define DEBUG_MODE 1
+
+#endif // ZUP_H
-- 
cgit v1.2.3