/******************************************************************************
*
* @name Virtual_Com_App
*
* @brief Implements Loopback COM Port
*
* @param None
*
* @return None
*
*****************************************************************************
* Receives data from USB Host and transmits back to the Host
*****************************************************************************/
static void Virtual_Com_App(void)
{
static uint_8 status = 0;
/* Loopback Application Code */
if(g_recv_size)
{
/* Copy Received Buffer to Send Buffer */
for (status = 0; status < g_recv_size; status++)
{
g_curr_send_buf[status] = g_curr_recv_buf[status];
}
g_send_size = g_recv_size;
g_recv_size = 0;
}
if(g_send_size)
{
/* Send Data to USB Host*/
uint_8 size = g_send_size;
g_send_size = 0;
status = USB_Class_CDC_Interface_DIC_Send_Data(CONTROLLER_ID,
g_curr_send_buf,size);
if(status != USB_OK)
{
/* Send Data Error Handling Code goes here */
}
}
return;
}
uint8 LPLD_USB_VirtualCom_Tx(uint8 *tx_buf,uint32_t len)
{
if(!usb_valid)return -1;
uint8 status = 0;
is_usr_usb_sending=1;
status = USB_Class_CDC_Interface_DIC_Send_Data(CONTROLLER_ID,tx_buf,len);
return status;
}
/*
** ===================================================================
** Method : CDC1_SendDataBlock (component FSL_USB_CDC_Device)
**
** Description :
** Sends a USB data block
** This method is internal. It is used by Processor Expert only.
** ===================================================================
*/
uint8_t CDC1_SendDataBlock(uint8_t *data, uint16_t dataSize)
{
uint8_t res = ERR_OK;
transactionOngoing = TRUE;
if (USB_Class_CDC_Interface_DIC_Send_Data(CONTROLLER_ID, data, dataSize)!=USB_OK) {
transactionOngoing = FALSE;
return ERR_FAULT;
}
/* wait for transaction finish */
while(transactionOngoing) { /* wait until transaction is finished */
CDC1_RunUsbEngine();
}
return res;
}
/******************************************************************************
*
* @name Virtual_Com_App
*
* @brief Implements Loopback COM Port
*
* @param None
*
* @return None
*
*****************************************************************************
* Receives data from USB Host and transmits back to the Host
*****************************************************************************/
void cdc_process(void)
{
static uint_8 status = 0;
uint_8 sem_status = 0;
uint_8 size;
OS_SR_SAVE_VAR;
size = g_send_size;
g_send_size = 0;
/*check whether enumeration is complete or not */
if((start_app==TRUE) && (start_transactions==TRUE))
{
OSEnterCritical();
is_message_sent = 1;
OSExitCritical();
status = USB_Class_CDC_Interface_DIC_Send_Data(CONTROLLER_ID, g_curr_send_buf,size);
sem_status = OSSemPend(USB_Sem,500);
if (sem_status != OK)
{
OSEnterCritical();
is_message_sent = 0;
OSExitCritical();
}
if(status != USB_OK)
{
/* Send Data Error Handling Code goes here */
status = 0;
}
}
#if 0
else
{
while(GetStart_transactions() == FALSE)
{
DelayTask(100);
}
}
#endif
}
/*
* LPLD_USB_VirtualCom_Tx
* 将USB CDC类模式虚拟成串口模式，该函数是串口发送函数
* 参数：
* *tx_buf -- 指向用户数据存储区，用于储存要发送的数据
* len -- 要发送的数据长度
* 输出：0x00 发送成功
* 非0x00 发送失败
*/
uint8 LPLD_USB_VirtualCom_Tx(uint8 *tx_buf,uint8 len)
{
uint8 status = 0;
status = USB_Class_CDC_Interface_DIC_Send_Data(CONTROLLER_ID,tx_buf,len);
return status;
}
