A type of MCU, "TI's DSP TMS320" and rosserial

I completed the serial setup of TMS320 with "Ti's IDE Code Composer Studio 9.1.0" and confirmed that SCI communication with PC is possible. I set it up according to "rosserial_client tutorials-Adding Support for New Hardware" on roswiki.

But I get the error below. Unable to sync with device, possible link problem or link software version mismatch such as hydro rosserial_python with groovy Arduino

I don't think it's a problem with my code. Could it be due to the size difference the data types?

my MCU(Code composer Studio IDE) - char 2byte / short 2byte / int 2byte / long int 4byte / float 4byte / double 4byte / long double 8byte

---

---

Debugging screen of my MCU.
Bold is class
-> is a pointer

Expression　　　　　Value

chatter
　->topic　　0x0000AAF2 "chatter"
　->msg　　0x0000ACC2{vptr=0x0000AB7A {delta=0,func=0x00000000}}
　id　　　　101
　->nh　　　0x0000AD00 {vptr=0x0000AB9E {delta=0,func=0x00000000}}
　endpoint_　0

nh
　->vptr　　　　0x0000AB9E {delta=0,func=0x00000000}
　hardware
　rttime　　　177395
　secoffset　　0
　nsecoffset　　0
　**messagein　['\x00','\x00','\x00','\x00','\x00',...]
　messageout　['\xff','\xfe','\x04','\x00','\xfb','\x0a','\x00','\x00','\x00','\x00','\x00','\xf5','\x00','\x00',...]
　publishers**
　　->[0]
　　　**([0])*
　　　　　->topic　0x0000AAF2 "chatter
　　　　　->msg　0x0000ACC2 {vptr=0x0000AB7A {delta=0,func=0x00000000}}
　　　　　id　　　　101
　　　　　->nh　　0x0000AD00 {vptr=0x0000AB9E {delta=0,func=0x00000000}}
　　　　　endpoint　0
　subscribers
　　->[0]
　　　**([0])*
　　　　id　　64
　　　　->topic　0x00000000 "@\307
　　　　->vptr　　0x00000000 {delta=64,func=0x00000000}
　mode　　　　0
　bytes　　　　0
　topic　　　　0
　index　　　　0
　checksum　　　25107
　configured　　　0 '\x00'
　lastsynctime　　　　　0
　lastsyncreceivetime　0
　lastmsgtimeouttime　177412
　paramrecieved　　　　0 '\x00'
　reqparamresp
　　->vptr　　　　　0x0000AB16 {delta=0,func=0x00000000}
　　intslength　　　0 '\x00'
　　stints　　　　　0
　　->ints　　　　　　0x00000000 {-2067333056}
　　floatslength　　0 '\x00'
　　stfloats　　　　0
　　->floats　　　　　0x00000000 {-4.67849048e-36}
　　stringslength　0 '\x00'
　　->st_strings　　　0x00000000 "@\307
　　->strings　　　　0x00000000 {0x84C70040 {0 '\x00'}}

#include <ros.h>
#include <std_msgs/String.h>

#include "F28x_Project.h"

__interrupt void SCIB_RxIsr(void);

Uint32 BackTicker=0;

ros::NodeHandle nh;
std_msgs::String str_msg;
ros::Publisher chatter("chatter", &str_msg);

char hello[13] = "hello world!";

void main(void)
{
    nh.initNode();
    nh.advertise(chatter);

    while(1)
    {
        BackTicker++;
        str_msg.data = hello;
        chatter.publish( &str_msg );
        nh.spinOnce();
        DELAY_US(1000*100);
    }
}

function: "<module>"
line: 86
topics: [/rosout]
---
header:
  seq: 3
  stamp:
    secs: 1618364857
    nsecs: 901356935
  frame_id: ''
level: 2
name: "/serial_node"
msg: "Requesting topics..."
file: "SerialClient.py"
function: "SerialClient.requestTopics"
line: 404
topics: [/diagnostics, /rosout]
---header:
  seq: 2
  stamp:
    secs: 1618364855
    nsecs: 788872957
  frame_id: ''
level: 2
name: "/serial_node"
msg: "Connecting to /dev/ttyUSB0 at 57600 baud"
file: "serial_node.py"
function: "<module>"
line: 86
topics: [/rosout]
---
header:
  seq: 3
  stamp:
    secs: 1618364857
    nsecs: 901356935
  frame_id: ''
level: 2
name: "/serial_node"
msg: "Requesting topics..."
file: "SerialClient.py"
function: "SerialClient.requestTopics"
line: 404
topics: [/diagnostics, /rosout]
--- 

header:
  seq: 6
  stamp:
    secs: 1618365337
    nsecs: 803142070
  frame_id: ''
level: 8
name: "/serial_node"
msg: "Lost sync with device, restarting..."
file: "SerialClient.py"
function: "SerialClient.run"
line: 461
topics: [/diagnostics, /rosout]
---
header:
  seq: 7
  stamp:
    secs: 1618365337
    nsecs: 809052944
  frame_id: ''
level: 2
name: "/serial_node"
msg: "Requesting topics..."
file: "SerialClient.py"
function: "SerialClient.requestTopics"
line: 404
topics: [/diagnostics, /rosout]