117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/08/08
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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This routine demonstrates the use of the USBD to emulate a custom device(CH372 like device),
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with endpoints 1/3 downlinking data and uploading it via endpoints 2/4/6 respectively
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where endpoint 1/2 is implemented via a ring buffer and data is not inverted,and endpoints
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3/4 is directly copied and inverted for upload
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The device can be operated using Bushund or other upper computer software.
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*/
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#include "debug.h"
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#include "usb_lib.h"
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#include "usb_desc.h"
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#include "hw_config.h"
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#include "usb_pwr.h"
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#include "usb_prop.h"
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/* Global define */
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/* Global Variable */
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/*********************************************************************
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* @fn Var_Init
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*
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* @brief Software parameter initialization
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*
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* @return none
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*/
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void Var_Init(void)
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{
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uint16_t i;
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RingBuffer_Comm.LoadPtr = 0;
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RingBuffer_Comm.StopFlag = 0;
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RingBuffer_Comm.DealPtr = 0;
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RingBuffer_Comm.RemainPack = 0;
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for(i=0; i<DEF_Ring_Buffer_Max_Blks; i++)
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{
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RingBuffer_Comm.PackLen[i] = 0;
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}
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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uint8_t ret;
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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SystemCoreClockUpdate();
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Delay_Init();
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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n",SystemCoreClock);
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printf("USBD CH372 Device Demo\r\n");
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Set_USBConfig();
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USB_Init();
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USB_Interrupts_Config();
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while(1)
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{
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if( bDeviceState == CONFIGURED )
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{
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/* Data Transfer */
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if(RingBuffer_Comm.RemainPack)
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{
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ret = USBD_ENDPx_DataUp(ENDP2, &EP1_Data_Buffer[(RingBuffer_Comm.DealPtr) * DEF_USBD_MAX_PACK_SIZE], RingBuffer_Comm.PackLen[RingBuffer_Comm.DealPtr]);
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if(ret == USB_SUCCESS)
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{
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NVIC_DisableIRQ(USB_LP_CAN1_RX0_IRQn);
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RingBuffer_Comm.RemainPack--;
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NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
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RingBuffer_Comm.DealPtr++;
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if(RingBuffer_Comm.DealPtr == DEF_Ring_Buffer_Max_Blks)
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{
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RingBuffer_Comm.DealPtr = 0;
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}
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}
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}
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/* Monitor whether the remaining space is available for further downloads */
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if(RingBuffer_Comm.RemainPack < (DEF_Ring_Buffer_Max_Blks - DEF_RING_BUFFER_RESTART))
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{
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if(RingBuffer_Comm.StopFlag)
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{
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printf("USB ring buffer full, stop receiving further data.\n");
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RingBuffer_Comm.StopFlag = 0;
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SetEPRxValid(ENDP1);
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}
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}
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}
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}
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}
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