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При загрузке мелкого кода :
Bootloader.
Wait U-BOOT magic_word 0x55424D37
U-BOOT magic_word 0x55424D37 become success
Have CMD_DATA_READY from U-BOOT
Have CMD_VERIFY_CRC from U-BOOT
CRC is ok
Try start M7 from DDR

При загрузке кода 82212 byte
MCUX SDK version: 2026.03.00
Bootloader.
Wait U-BOOT magic_word 0x55424D37
U-BOOT magic_word 0x55424D37 become success

        if (cmd == CMD_DATA_READY) {
            PRINTF("Have CMD_DATA_READY from U-BOOT\r\n");
            ipc->status = STAT_BUSY;
            __DSB(); /* Ensure status write completes before processing data */
            /* Safe memory block copy from TCM communication buffer to target DDR location */
            memcpy((void *)current_ddr_ptr, (const void *)ipc->buffer, ipc->chunk_size);
            /* Feed the chunk into the continuous stream CRC32 accumulator */
            calculated_total_crc = calculate_crc32(calculated_total_crc, (const uint8_t *)ipc->buffer, ipc->chunk_size);
            /* Advance the DDR pointer forward by the size of the written chunk */
            current_ddr_ptr += ipc->chunk_size;
            
            /* Data Synchronization Barrier: Ensure all bus transaction write cycles to DDR are complete */
            __DSB(); __ISB();

            /* Signal U-Boot that the data chunk has been acknowledged and saved */
            ipc->command = 0;
            ipc->status = STAT_ACK;
            __DSB();
        } 
Почему-то не печатается даже - Have CMD_DATA_READY from U-BOOT.