Share PM67 upload protocol through C core

c/set-protocol/include/tms2812.h

@@ -0,0 +1,49 @@
+/**
+ * @file tms2812.h
+ * @brief Shared PM67/TMS320F2812 legacy upload protocol.
+ */
+#ifndef TMS2812_H
+#define TMS2812_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define TMS2812_CMD_UPLOAD 52U
+#define TMS2812_UPLOAD_REQUEST_SIZE 12U
+#define TMS2812_UPLOAD_RESPONSE_OVERHEAD 8U
+
+typedef enum {
+    TMS2812_OK = 0,
+    TMS2812_ERROR_ARGUMENT = -1,
+    TMS2812_ERROR_RANGE = -2,
+    TMS2812_ERROR_LENGTH = -3,
+    TMS2812_ERROR_CRC = -4,
+    TMS2812_ERROR_HEADER = -5,
+    TMS2812_ERROR_CAPACITY = -6
+} tms2812_status_t;
+
+uint16_t tms2812_crc16(const uint8_t *data, size_t size);
+
+size_t tms2812_build_upload_request(
+    uint8_t controller, uint32_t word_address, uint32_t byte_count,
+    uint8_t *output, size_t output_size);
+
+size_t tms2812_expected_upload_response_size(uint32_t byte_count);
+
+int tms2812_validate_upload_response(
+    const uint8_t *data, size_t size, uint8_t controller,
+    uint32_t byte_count);
+
+int tms2812_decode_upload_response(
+    const uint8_t *data, size_t size, uint8_t controller,
+    uint32_t byte_count, uint8_t *output, size_t output_size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* TMS2812_H */