Temporarily backport app updates from apps repo

applications/external/avr_isp/helpers/flipper_i32hex_file.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <furi_hal.h>
+
+typedef struct FlipperI32HexFile FlipperI32HexFile;
+
+typedef enum {
+    FlipperI32HexFileStatusOK = 0,
+    FlipperI32HexFileStatusData = 2,
+    FlipperI32HexFileStatusUdateAddr = 3,
+    FlipperI32HexFileStatusEofFile = 4,
+    FlipperI32HexFileStatusOpenFileWrite = 5,
+    FlipperI32HexFileStatusOpenFileRead = 6,
+
+    // Errors
+    FlipperI32HexFileStatusErrorCrc = (-1),
+    FlipperI32HexFileStatusErrorOverflow = (-2),
+    FlipperI32HexFileStatusErrorData = (-3),
+    FlipperI32HexFileStatusErrorUnsupportedCommand = (-4),
+    FlipperI32HexFileStatusErrorNoOpenFile = (-5),
+    FlipperI32HexFileStatusErrorFileWrite = (-6),
+    FlipperI32HexFileStatusErrorFileRead = (-7),
+
+    FlipperI32HexFileStatusReserved =
+        0x7FFFFFFF, ///< Prevents enum down-size compiler optimization.
+} FlipperI32HexFileStatus;
+
+typedef struct {
+    FlipperI32HexFileStatus status;
+    uint32_t data_size;
+} FlipperI32HexFileRet;
+
+FlipperI32HexFile* flipper_i32hex_file_open_write(const char* name, uint32_t start_addr);
+
+FlipperI32HexFile* flipper_i32hex_file_open_read(const char* name);
+
+void flipper_i32hex_file_close(FlipperI32HexFile* instance);
+
+FlipperI32HexFileRet flipper_i32hex_file_bin_to_i32hex_set_data(
+    FlipperI32HexFile* instance,
+    uint8_t* data,
+    uint32_t data_size);
+
+FlipperI32HexFileRet flipper_i32hex_file_bin_to_i32hex_set_end_line(FlipperI32HexFile* instance);
+
+const char* flipper_i32hex_file_get_string(FlipperI32HexFile* instance);
+
+void flipper_i32hex_file_bin_to_i32hex_set_addr(FlipperI32HexFile* instance, uint32_t addr);
+
+bool flipper_i32hex_file_check(FlipperI32HexFile* instance);
+
+FlipperI32HexFileRet flipper_i32hex_file_i32hex_to_bin_get_data(
+    FlipperI32HexFile* instance,
+    uint8_t* data,
+    uint32_t data_size);