diff --git a/osal/usb_osal_rtx.c b/osal/usb_osal_rtx.c
deleted file mode 100644
index ef24a735..00000000
--- a/osal/usb_osal_rtx.c
+++ /dev/null
@@ -1,122 +0,0 @@
-#include "usb_osal.h"
-#include "usb_errno.h"
-#include "stdlib.h"
-#include "RTL.h"
-
-uint32_t enter_critical(void);
-uint32_t exit_critical(uint32_t sr);
-
-//延时=timeout/os_tick， os tick设置为1ms，延时=timeout
-//移植为arm9，其他版本可能需要调整汇编代码
-
-//按最大端点数量设置，这里设为8
-_declare_box8(sem_mpool, sizeof(OS_SEM), 8);
-_declare_box8(mut_mpool, sizeof(OS_MUT), 8);
-
-usb_osal_thread_t usb_osal_thread_create(const char *name, uint32_t stack_size, uint32_t prio, usb_thread_entry_t entry, void *args)
-{
-    void *stk = malloc(stack_size);
-    _init_box8(sem_mpool, sizeof(sem_mpool), sizeof(OS_SEM));
-    _init_box8(mut_mpool, sizeof(mut_mpool), sizeof(OS_MUT));
-
-    return (usb_osal_thread_t)os_tsk_create_user_ex (entry, prio,
-                                  stk, stack_size,
-                                  args);
-}
-
-usb_osal_sem_t usb_osal_sem_create(uint32_t initial_count)
-{
-    void *sem = _alloc_box(sem_mpool);
-    if(sem != NULL) os_sem_init(sem, initial_count);
-    return (usb_osal_sem_t)sem;
-}
-
-//删除os同步量，并不简单    //不能有无限等待的信号量，否则不能删除
-void usb_osal_sem_delete(usb_osal_sem_t sem)
-{
-    _free_box(sem_mpool, sem);
-}
-
-int usb_osal_sem_take(usb_osal_sem_t sem, uint32_t timeout)
-{
-    return (os_sem_wait(sem, timeout) != OS_R_TMO) ? 0 : -ETIMEDOUT;
-}
-
-//在线程，中断均调用
-int usb_osal_sem_give(usb_osal_sem_t sem)
-{
-    uint32_t intstatus = 0;
-     /* Obtain the number of the currently executing interrupt. */
-     __asm volatile ( "mrs intstatus, cpsr" );
-    if ((intstatus & 0xf) == 0) {   //user mode
-        os_sem_send(sem);
-    } else {
-        isr_sem_send(sem);
-    }
-
-    return 0;
-}
-
-usb_osal_mutex_t usb_osal_mutex_create(void)
-{
-    void *mut = _alloc_box(mut_mpool);
-    if(mut != NULL) os_mut_init(mut);
-    return (usb_osal_mutex_t)mut;
-}
-
-void usb_osal_mutex_delete(usb_osal_mutex_t mutex)
-{
-    _free_box(mut_mpool, mutex);
-}
-
-int usb_osal_mutex_take(usb_osal_mutex_t mutex)
-{
-    os_mut_wait(mutex, 0xffff);
-    return 0;
-}
-
-int usb_osal_mutex_give(usb_osal_mutex_t mutex)
-{
-    return (os_mut_release(mutex) == OS_R_OK) ? 0 : -EINVAL;
-}
-
-//这两个函数只在线程调用，可以改为tsk_lock和tsk_unlock版本
-size_t usb_osal_enter_critical_section(void)
-{
-    return enter_critical();
-}
-
-void usb_osal_leave_critical_section(size_t flag)
-{
-    exit_critical(flag);
-}
-
-void usb_osal_msleep(uint32_t delay)
-{
-    os_dly_wait(delay);
-}
-
-#pragma arm
-
-__asm uint32_t __builtin_ctz(uint32_t val)
-{
-    rsb r3, r0, #0
-    and r0, r3, r0
-    clz r0, r0
-    rsb r0, r0, #31
-    bx  lr
-}
-
-__asm uint32_t enter_critical(void)
-{
-    mrs R0, CPSR
-    orr R1, R0, #0xC0   ; Disable IRQ and FIQ
-    msr CPSR_c, R1
-    bx  lr
-}
-
-__asm uint32_t exit_critical(uint32_t sr)
-{
-    msr CPSR_c, R0
-    bx  lr
-}