diff --git a/f1/can/include/can.h b/f1/can/include/can.h
index b1cbd78e66c295111989fa13753c6d5fbfe3ec07..3c1d1f589e3b588c609559a9fc3a1f385c2fc1a9 100644
--- a/f1/can/include/can.h
+++ b/f1/can/include/can.h
@@ -90,6 +90,7 @@ void can_config(TComm *comm_dev,CAN_InitTypeDef *conf);
 void can_set_priorities(TComm *comm_dev,TCAN_IRQ_Priorities *priorities);
 void can_set_bitrate(TComm *comm_dev,CAN_SPEED bitrate);
 void can_set_filter(TComm *comm_dev,CAN_FilterConfTypeDef *filter);
+void can_set_can_id(TComm *comm_dev,unsigned char id);
 /* IRQ functions */
 unsigned char can_send_irq(unsigned char first_byte);
 unsigned char can_enable_tx_irq(void);
diff --git a/f1/can/src/can.c b/f1/can/src/can.c
index c78107c986cde75bdc8a2c966a20bc2fe46d48e8..bc95bcb1affd6685e2bfdcc5212e49d8da8a549e 100644
--- a/f1/can/src/can.c
+++ b/f1/can/src/can.c
@@ -26,6 +26,14 @@ unsigned char *can_dma_phase_data;
 unsigned short int can_dma_phase_length;
 unsigned short int can_dma_phase_write_ptr;
 
+unsigned char can_missing_bytes_data[255];
+unsigned short int can_missing_bytes_length;
+unsigned short int can_missing_bytes_write_ptr;
+
+unsigned short int can_send_lenght;
+unsigned short int can_send_iterations;
+unsigned char can_send_data[255];
+
 TDynamixelMessage message;
 
 // 1
@@ -86,6 +94,10 @@ void can_init(TComm *comm_dev,CAN_InitTypeDef *conf,TCAN_IRQ_Priorities *priorit
   can_dma_phase_data=0x00;
   can_dma_phase_length=0;
   can_dma_phase_write_ptr=0;
+  can_missing_bytes_length = 0;
+  can_missing_bytes_write_ptr = 0;
+  can_send_lenght = 0;
+  can_send_iterations = 0;
 
   message.packet_init = 0x00;
   message.packet_incomplete = 0x00;
@@ -109,12 +121,12 @@ void can_init(TComm *comm_dev,CAN_InitTypeDef *conf,TCAN_IRQ_Priorities *priorit
   CANHandle.pRxMsg = &CAN_rxMessage;
   CANHandle.pTxMsg = &CAN_txMessage;
 
-  CANHandle.pTxMsg->StdId = 0x321;
+  CANHandle.pTxMsg->StdId = 0x00;
   CANHandle.pTxMsg->ExtId = 0x01;
   CANHandle.pTxMsg->RTR = CAN_RTR_DATA;
   CANHandle.pTxMsg->IDE = CAN_ID_STD;
 
-  HAL_CAN_Receive_IT(&CANHandle,CAN_FIFO0);
+  //HAL_CAN_Receive_IT(&CANHandle,CAN_FIFO0);
 
 }
 
@@ -204,198 +216,127 @@ void can_set_bitrate(TComm *comm_dev,CAN_SPEED bitrate)
 void can_set_filter(TComm *comm_dev,CAN_FilterConfTypeDef *filter)
 {
   HAL_CAN_ConfigFilter(&CANHandle, filter);
-  HAL_CAN_Receive_IT(&CANHandle,CAN_FIFO0);
+  //HAL_CAN_Receive_IT(&CANHandle,CAN_FIFO0);
 }
 
-void HAL_CAN_ErrorCallback(CAN_HandleTypeDef *CANHandle)
+void can_set_can_id(TComm *comm_dev,unsigned char id)
 {
-  HAL_CAN_Receive_IT(CANHandle,CAN_FIFO0);
-  // HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_4);
+  CANHandle.pTxMsg->StdId = id;
 }
 
-void HAL_CAN_TxCpltCallback(CAN_HandleTypeDef* CANHandle)
+/**
+ * HAL_CAN_ErrorCallback
+ * Callback function for CAN errors.
+ * @param CANHandle  Pointer to a CAN_HandleTypeDef structure that contains
+ *        the configuration information for a given CAN peripheral.
+ */
+void HAL_CAN_ErrorCallback(CAN_HandleTypeDef* CANHandle)
 {
-  // HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_4);
+  //HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4,GPIO_PIN_SET);
 }
 
-void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef* CANHandle)
+
+void HAL_CAN_TxCpltCallback(CAN_HandleTypeDef* CANHandle)
 {
-  // for (int i = 0; i<10; i++){
-  //    HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_4);
-  //    for (int i = 0; i<100000; i++){;}
+  // HAL_CAN_StateTypeDef status = HAL_CAN_GetState(CANHandle);
+  // while(HAL_CAN_STATE_READY != status)
+  // {
+  //   status = HAL_CAN_GetState(CANHandle);
   // }
 
-  for(uint8_t i=0;i<CAN_rxMessage.DLC;i++)
+  if (can_send_lenght != 0)
   {
-    if(!can_dma_phase)
-      comm_do_irq_receive(can_comm_dev,CAN_rxMessage.Data[i]);
+    if (can_send_lenght > 8)
+    {
+      for (uint8_t i=0;i<8;i++)
+      {
+        CANHandle->pTxMsg->Data[i] = can_send_data[i+(8*can_send_iterations)];
+      }
+      can_send_lenght = can_send_lenght - 8;
+      can_send_iterations++;
+      HAL_CAN_Transmit_IT(CANHandle);
+    }
     else
     {
-      can_dma_phase_data[can_dma_phase_write_ptr]=CAN_rxMessage.Data[i];
-      can_dma_phase_length--;
-      can_dma_phase_write_ptr++;
-      if(can_dma_phase_length==0)
-        comm_do_dma_receive(can_comm_dev);
+      for (uint8_t i=0;i<can_send_lenght;i++)
+      {
+        CANHandle->pTxMsg->Data[i] = can_send_data[i+(8*can_send_iterations)];
+      }
+      can_send_lenght = 0;
+      can_send_iterations = 0;
+      HAL_CAN_Transmit_IT(CANHandle);
+      uint8_t byte;
+      comm_do_dma_send(can_comm_dev);
+      comm_do_irq_send(can_comm_dev,&byte);
+    }
+  }
+  //__HAL_CAN_DISABLE_IT(CANHandle,CAN_IT_TME);
+  __HAL_CAN_CLEAR_FLAG(CANHandle,CAN_FLAG_RQCP0);
+  __HAL_CAN_CLEAR_FLAG(CANHandle,CAN_FLAG_TXOK0);
+}
+
+void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef* CANHandle)
+{
+  if(can_missing_bytes_length == 0){
+    for(uint8_t i=0;i<CAN_rxMessage.DLC;i++)
+    {
+      if(!can_dma_phase)
+        comm_do_irq_receive(can_comm_dev,CAN_rxMessage.Data[i]);
+      else
+      {
+        if(can_dma_phase_length<5){
+          can_dma_phase_data[can_dma_phase_write_ptr]=CAN_rxMessage.Data[i];
+          can_dma_phase_length--;
+          can_dma_phase_write_ptr++;
+          if(can_dma_phase_length==0){
+            comm_do_dma_receive(can_comm_dev);
+          }
+        }
+      }
+    }
+    if(can_dma_phase_length>4){
+      for(uint8_t i=0;i<CAN_rxMessage.DLC;i++)
+        can_missing_bytes_data[i] = CAN_rxMessage.Data[i];
+      can_missing_bytes_length = can_dma_phase_length-4;
+      can_missing_bytes_write_ptr = 7;
+    }
+  }
+  else
+  {
+    if(can_missing_bytes_length<=8){
+      for(uint8_t i=0;i<CAN_rxMessage.DLC;i++)
+      {
+        can_missing_bytes_write_ptr++;
+        can_missing_bytes_length--;
+        can_missing_bytes_data[can_missing_bytes_write_ptr] = CAN_rxMessage.Data[i];
+      }
+      for(uint8_t i=0;i<=can_missing_bytes_write_ptr;i++)
+      {
+        if(!can_dma_phase)
+          comm_do_irq_receive(can_comm_dev,can_missing_bytes_data[i]);
+        else
+        {
+            can_dma_phase_data[can_dma_phase_write_ptr]=can_missing_bytes_data[i];
+            can_dma_phase_length--;
+            can_dma_phase_write_ptr++;
+            if(can_dma_phase_length==0){
+              comm_do_dma_receive(can_comm_dev);
+              can_missing_bytes_length = 0;
+              can_missing_bytes_write_ptr = 0;
+            }
+        }
+      }
+    }
+    else
+    {
+      for(uint8_t i=0;i<CAN_rxMessage.DLC;i++)
+      {
+        can_missing_bytes_write_ptr++;
+        can_missing_bytes_length--;
+        can_missing_bytes_data[can_missing_bytes_write_ptr] = CAN_rxMessage.Data[i];
+      }
     }
   }
-  HAL_CAN_Receive_IT(CANHandle,CAN_FIFO0);
-  // message.received_bytes = 0;
-  // if(!message.packet_init)
-  // {
-  //   if (CAN_rxMessage.DLC<6)
-  //   {
-  //     message.Len_L = 0x00;
-  //     message.Len_H = 0x00;
-  //     message.length = 0x00;
-  //     message.packet_init = 0x00;
-  //     message.packet_incomplete = 0x00;
-  //     message.send_packet = 0x00;
-  //     message.version = VERSION_NULL;
-  //   }
-  //   else
-  //   {
-  //     for(uint8_t i=0;i<CAN_rxMessage.DLC;i++)
-  //     {
-  //       uint8_t byte = CAN_rxMessage.Data[i];
-  //
-  //       switch(message.received_bytes)
-  //       {
-  //         case 0: if(byte==0xFF)
-  //                 {
-  //                   message.rx_buffer[message.received_bytes]=byte;
-  //                   message.received_bytes++;
-  //                 }
-  //                 break;
-  //         case 1: if(byte==0xFF)
-  //                 {
-  //                   message.rx_buffer[message.received_bytes]=byte;
-  //                   message.received_bytes++;
-  //                 }
-  //                 else
-  //                   message.received_bytes--;
-  //                 break;
-  //         case 2: message.rx_buffer[message.received_bytes]=byte; //ID vs 0xFD
-  //                 message.received_bytes++;
-  //                 break;
-  //         case 3: if(byte!=0x00)                                  //Length vs 0x00
-  //                 {
-  //                   message.version = VERSION_1;
-  //                   message.Len_L = byte;
-  //                   message.length = byte+4;
-  //                   message.packet_init = 0x01;
-  //                   message.rx_buffer[message.received_bytes] = byte;
-  //                 }
-  //                 else
-  //                 {
-  //                   message.version = VERSION_2;
-  //                 }
-  //                 message.received_bytes++;
-  //                 break;
-  //         case 4: if (message.version == VERSION_2)               //Instruction vs ID
-  //                 {
-  //                   message.rx_buffer[message.received_bytes] = byte;
-  //                 }
-  //                 message.received_bytes++;
-  //                 break;
-  //         case 5: if (message.version == VERSION_2)               //Pn vs Len_L
-  //                 {
-  //                   message.rx_buffer[message.received_bytes] = byte;
-  //                   message.Len_L = byte;
-  //                 }
-  //                 message.received_bytes++;
-  //                 break;
-  //         case 6: if (message.version == VERSION_2)               //Pn vs Len_L
-  //                 {
-  //                   message.rx_buffer[message.received_bytes] = byte;
-  //                   message.Len_H = byte;
-  //                   message.length = (message.Len_H << 8) + message.Len_L;
-  //                   message.packet_init = 0x01;
-  //                 }
-  //                 message.received_bytes++;
-  //                 break;
-  //         default: break;
-  //       }
-  //     }
-  //   }
-  // }
-  //
-  // if(message.packet_init)
-  // {
-  //   if (message.version == VERSION_1)
-  //   {
-  //     if (!message.packet_incomplete)
-  //     {
-  //       if (message.Len_L<=4)
-  //       {
-  //         for(uint8_t i=4;i<(message.Len_L+4);i++)
-  //         {
-  //           message.rx_buffer[i]=CAN_rxMessage.Data[i];
-  //         }
-  //         message.send_packet = 0x01;
-  //         message.packet_incomplete = 0x00;
-  //       }
-  //       else
-  //       {
-  //         for(uint8_t i=4;i<8;i++)
-  //         {
-  //           message.rx_buffer[i]=CAN_rxMessage.Data[i];
-  //         }
-  //         message.Len_L = message.Len_L-4;
-  //         message.packet_incomplete = 0x01;
-  //       }
-  //     }
-  //     else
-  //     {
-  //       if (message.Len_L<8)
-  //       {
-  //         for(uint8_t i=0;i<message.Len_L;i++)
-  //         {
-  //           message.rx_buffer[i+(message.iterations*8)]=CAN_rxMessage.Data[i];
-  //         }
-  //         message.send_packet = 0x01;
-  //       }
-  //       else
-  //       {
-  //         for(uint8_t i=0;i<8;i++)
-  //         {
-  //           message.rx_buffer[i+(message.iterations*8)]=CAN_rxMessage.Data[i];
-  //         }
-  //         message.Len_L = message.Len_L-8;
-  //       }
-  //       message.iterations++;
-  //     }
-  //   }
-  //   else if (message.version == VERSION_2)
-  //   {
-  //
-  //   }
-  // }
-  //
-  // if (message.send_packet)
-  // {
-  //   for(unsigned int i=0;i<message.length;i++)
-  //   {
-  //     if(!can_dma_phase)
-  //        comm_do_irq_receive(can_comm_dev,message.rx_buffer[i]);
-  //     else /* do DMA phase */
-  //     {
-  //       can_dma_phase_data[can_dma_phase_write_ptr]=message.rx_buffer[i];
-  //       can_dma_phase_length--;
-  //       can_dma_phase_write_ptr++;
-  //       if(can_dma_phase_length==0)
-  //       {
-  //         comm_do_dma_receive(can_comm_dev);
-  //       }
-  //     }
-  //   }
-  //
-  //   message.Len_L = 0x00;
-  //   message.Len_H = 0x00;
-  //   message.length = 0x00;
-  //   message.packet_init = 0x00;
-  //   message.packet_incomplete = 0x00;
-  //   message.send_packet = 0x00;
-  // }
 }
 
 // interrupt handlers
@@ -434,6 +375,8 @@ unsigned char can_enable_tx_irq(void)
 unsigned char can_receive_irq(void)
 {
   can_dma_phase=0x00;
+  can_dma_phase_write_ptr=0x00;
+  HAL_CAN_Receive_IT(&CANHandle,CAN_FIFO0);
   return 0x00;
 }
 
@@ -445,48 +388,63 @@ unsigned char can_cancel_receive_irq(void)
 /* DMA functions */
 unsigned char can_send_dma(unsigned char *data,unsigned short int length)
 {
-  if (length <= 8)
-  {
-    CANHandle.pTxMsg->DLC = length;
+  // if (length <= 8)
+  // {
+  //   CANHandle.pTxMsg->DLC = length;
+  //   for (uint8_t i=0;i<length;i++)
+  //   {
+  //     CANHandle.pTxMsg->Data[i] = data[i];
+  //   }
+  //   HAL_CAN_Transmit_IT(&CANHandle);
+  // }
+  // else
+  // {
+  //   unsigned char iterations = 0x00;
+  //   while (length > 0)
+  //   {
+  //     if(length > 8)
+  //       CANHandle.pTxMsg->DLC = 8;
+  //     else
+  //       CANHandle.pTxMsg->DLC = length;
+  //     for (uint8_t i=0;i<CANHandle.pTxMsg->DLC;i++)
+  //     {
+  //       CANHandle.pTxMsg->Data[i] = data[i+iterations];
+  //     }
+  //     HAL_CAN_Transmit_IT(&CANHandle);
+  //     HAL_Delay(5);
+  //     iterations = iterations + 8;
+  //     length = length - CANHandle.pTxMsg->DLC;
+  //   }
+  // }
+
+  if(length > 8){
+    CANHandle.pTxMsg->DLC = 8;
     for (uint8_t i=0;i<length;i++)
+    {
+      can_send_data[i] = data[i];
+    }
+    can_send_lenght = length - 8;
+    can_send_iterations = 1;
+    for (uint8_t i=0;i<8;i++)
     {
       CANHandle.pTxMsg->Data[i] = data[i];
     }
-    //HAL_CAN_Transmit(&CANHandle, 10);
     HAL_CAN_Transmit_IT(&CANHandle);
   }
-  else
-  {
-    // unsigned char completed = 0x00;
-    // unsigned char iterations = 0x00;
-    // while (!completed) {
-    //   if (length>8)
-    //   {
-    //     CANHandle.pTxMsg->DLC = 8;
-    //     for (uint8_t i=0;i<8;i++)
-    //     {
-    //       CANHandle.pTxMsg->Data[i] = data[i+iterations];
-    //     }
-    //     iterations = iterations+8;
-    //     HAL_CAN_Transmit(&CANHandle, 10);
-    //     length = length-8;
-    //   }
-    //   else
-    //   {
-    //     CANHandle.pTxMsg->DLC = length;
-    //     for (uint8_t i=0;i<length;i++)
-    //     {
-    //       CANHandle.pTxMsg->Data[i] = data[i+iterations];
-    //     }
-    //     HAL_CAN_Transmit(&CANHandle, 10);
-    //     completed = 0x01;
-    //   }
-    // }
+  else{
+    CANHandle.pTxMsg->DLC = length;
+    for (uint8_t i=0;i<length;i++)
+    {
+      CANHandle.pTxMsg->Data[i] = data[i];
+    }
+    HAL_CAN_Transmit_IT(&CANHandle);
+    uint8_t byte;
+    comm_do_dma_send(can_comm_dev);
+    comm_do_irq_send(can_comm_dev,&byte);
   }
-  uint8_t byte;
-  comm_do_dma_send(can_comm_dev);
-  comm_do_irq_send(can_comm_dev,&byte);
-
+  //HAL_CAN_Transmit_IT(&CANHandle);
+  __HAL_CAN_CLEAR_FLAG(&CANHandle,CAN_FLAG_RQCP0);
+  __HAL_CAN_CLEAR_FLAG(&CANHandle,CAN_FLAG_TXOK0);
   return 0x00;
 }