diff --git a/bsp/tms320f28379d/applications/application.c b/bsp/tms320f28379d/applications/application.c
index 4ceb5eef75461624db52fff620cd2593890bacdf..5c7b769a4da93fefbd3cf48c38f6e310ce372602 100644
--- a/bsp/tms320f28379d/applications/application.c
+++ b/bsp/tms320f28379d/applications/application.c
@@ -12,12 +12,15 @@
 #include <board.h>
 #include <rtthread.h>
 
+#ifdef RT_USING_FINSH
+#include "shell.h"
+#endif
+
 void rt_init_thread_entry(void* parameter)
 {
-    /* initialization RT-Thread Components */
-    rt_components_init();
+#ifdef RT_USING_FINSH
     finsh_system_init();
-	
+#endif
 }
 
 int rt_application_init()
diff --git a/bsp/tms320f28379d/drivers/board.c b/bsp/tms320f28379d/drivers/board.c
index ee1c9f06afd93d9e256ea13bf5109acb3121ae8c..b83cb7a96698b8bd28c5ecdd7cc7fb3028342aa9 100644
--- a/bsp/tms320f28379d/drivers/board.c
+++ b/bsp/tms320f28379d/drivers/board.c
@@ -13,8 +13,16 @@
 #include "drv_sci.h"
 #include "F28x_Project.h"
 
+extern rt_uint32_t rt_thread_switch_interrupt_flag;
+
 extern interrupt void RTOSINT_Handler();
 
+void trap_rtosint()
+{
+    if(rt_thread_switch_interrupt_flag)
+        asm(" trap #16");
+}
+
 /**
  * This is the timer interrupt service routine.
  *
@@ -31,7 +39,7 @@ interrupt void cpu_timer2_isr(void)
 }
 
 /**
- * This function will initial STM32 board.
+ * This function will initial TMS320F28379D board.
  */
 void rt_hw_board_init()
 {
@@ -68,4 +76,5 @@ void rt_hw_board_init()
 #ifdef RT_USING_CONSOLE
     rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
 #endif
+    rt_interrupt_leave_sethook((void (*)(void))trap_rtosint);
 }
diff --git a/bsp/tms320f28379d/drivers/drv_sci.c b/bsp/tms320f28379d/drivers/drv_sci.c
index e345097f06ef97fb7fde60da36665dd60f48353a..0920d382f522462569b15f55a429b01e6f9df041 100644
--- a/bsp/tms320f28379d/drivers/drv_sci.c
+++ b/bsp/tms320f28379d/drivers/drv_sci.c
@@ -214,7 +214,6 @@ int rt_hw_sci_init(void)
     CpuSysRegs.PCLKCR7.bit.SCI_C = 1;
 
     PieVectTable.SCIA_RX_INT = &sciaRxFifoIsr;
-    //PieVectTable.SCIA_TX_INT = &sciaTxFifoIsr;
 
     EDIS;
 
@@ -223,8 +222,7 @@ int rt_hw_sci_init(void)
     //
     PieCtrlRegs.PIECTRL.bit.ENPIE = 1;   // Enable the PIE block
     PieCtrlRegs.PIEIER9.bit.INTx1 = 1;   // PIE Group 9, INT1
-    //PieCtrlRegs.PIEIER9.bit.INTx2 = 1;   // PIE Group 9, INT2
-    IER = 0x100;                         // Enable CPU INT
+    IER |= 0x100;                        // Enable CPU INT
     EINT;
 
     struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
diff --git a/libcpu/ti-dsp/c28x/context.s b/libcpu/ti-dsp/c28x/context.s
index 019b5def1378f5f9ce1488eb0ff1b0da5726ae11..fc1734f5ca386cfa110c349fe216a8bb81dea2a4 100644
--- a/libcpu/ti-dsp/c28x/context.s
+++ b/libcpu/ti-dsp/c28x/context.s
@@ -94,11 +94,10 @@ _rt_hw_interrupt_enable:
  
     .asmfunc
 _rt_hw_context_switch_interrupt:
-_rt_hw_context_switch:
     MOVL    XAR0, #0
     MOV     AR0, AL
     MOVL    XAR4, *-SP[4]
-    ; set rt_thread_switch_interrupt_flag to 1 
+    ; set rt_thread_switch_interrupt_flag to 1
     MOVL    XAR5, #_rt_thread_switch_interrupt_flag
     MOVL    XAR6, *XAR5
     MOVL    ACC, XAR6
@@ -114,6 +113,37 @@ _reswitch:
     MOVL    XAR5, #_rt_interrupt_to_thread     ; set rt_interrupt_to_thread
     MOVL    *XAR5, XAR4
 
+    ;TRAP    #16
+    LRETR
+    .endasmfunc
+
+;
+; void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
+; r0 --> from
+; r4 --> to
+
+
+    .asmfunc
+_rt_hw_context_switch:
+    MOVL    XAR0, #0
+    MOV     AR0, AL
+    MOVL    XAR4, *-SP[4]
+    ; set rt_thread_switch_interrupt_flag to 1 
+    MOVL    XAR5, #_rt_thread_switch_interrupt_flag
+    MOVL    XAR6, *XAR5
+    MOVL    ACC, XAR6
+    CMPB    AL, #1
+    B       _reswitch2, EQ
+    MOVL     XAR6, #1
+    MOVL    *XAR5, XAR6
+
+    MOVL    XAR5, #_rt_interrupt_from_thread   ; set rt_interrupt_from_thread
+    MOVL    *XAR5, XAR0
+
+_reswitch2:
+    MOVL    XAR5, #_rt_interrupt_to_thread     ; set rt_interrupt_to_thread
+    MOVL    *XAR5, XAR4
+
     TRAP    #16
     LRETR
     .endasmfunc
@@ -159,9 +189,9 @@ _RTOSINT_Handler:
 ;#endif
 
     MOV     AL, *AR0
-    MOV     AR1, AL
+    MOV     AR0, AL
     MOVZ    AR1, @SP                 ; get from thread stack pointer
-    MOV     *AR0, AR1                ; update from thread stack pointer 
+    MOV     *AR0, AR1                ; update from thread stack pointer
 
 switch_to_thread:
     MOV     AR1, #_rt_interrupt_to_thread
@@ -175,7 +205,7 @@ switch_to_thread:
 ;#endif
 
     MOV     @SP, AR1
-    INC     SP
+    ;INC     SP
     RT_CTX_RESTORE     ; pop r4 - r11 register
 
 rtosint_exit:
diff --git a/libcpu/ti-dsp/c28x/cpuport.c b/libcpu/ti-dsp/c28x/cpuport.c
index 8885f647a9c9ac753a6bcfa7e05c364765dc58f6..2d42884beda76578578e422742792a38946fe90d 100644
--- a/libcpu/ti-dsp/c28x/cpuport.c
+++ b/libcpu/ti-dsp/c28x/cpuport.c
@@ -17,6 +17,9 @@ rt_uint32_t rt_thread_switch_interrupt_flag;
 /* exception hook */
 static rt_err_t (*rt_exception_hook)(void *context) = RT_NULL;
 
+extern rt_uint16_t rt_hw_get_st0(void);
+extern rt_uint16_t rt_hw_get_st1(void);
+
 struct exception_stack_frame
 {
     rt_uint32_t t_st0;
@@ -59,6 +62,7 @@ rt_uint8_t *rt_hw_stack_init(void       *tentry,
     stk  = stack_addr;
     stk  = (rt_uint8_t *)RT_ALIGN((rt_uint32_t)stk, 8);
     //stk -= sizeof(struct stack_frame);
+    stk += 1;
 
     stack_frame = (struct stack_frame *)stk;