108 lines
3.5 KiB
C
108 lines
3.5 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 : 2022/08/20
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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 USBFS to emulate a custom CH372 device,
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with endpoints 1/3/5 downloading 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 the data is not inverted,
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and endpoints 3/4 and 5/6 are 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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Note: This routine needs to be demonstrated in conjunction with the host software.
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*/
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#include "ch32v20x_usbfs_device.h"
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#include "debug.h"
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/*********************************************************************
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* @fn Var_Init
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*
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* @brief Software parameter initialisation
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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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Delay_Init();
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USART_Printf_Init( 115200 );
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printf("SystemClk:%d\r\n",SystemCoreClock);
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/* USBOTG_FS device init */
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printf("CH372Device Running On USBOTG_FS Controller\r\n");
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Delay_Ms( 10 );
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/* Variables init */
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Var_Init( );
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/* Usb Init */
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USBFS_RCC_Init( );
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USBFS_Device_Init( ENABLE );
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NVIC_EnableIRQ(USBHD_IRQn);
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while(1)
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{
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/* Determine if enumeration is complete, perform data transfer if completed */
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if(USBFS_DevEnumStatus)
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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 = USBFS_Endp_DataUp(DEF_UEP2, &Data_Buffer[(RingBuffer_Comm.DealPtr) * DEF_USBD_FS_PACK_SIZE], RingBuffer_Comm.PackLen[RingBuffer_Comm.DealPtr], DEF_UEP_CPY_LOAD);
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if( ret == 0 )
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{
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NVIC_DisableIRQ(USBHD_IRQn);
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RingBuffer_Comm.RemainPack--;
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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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NVIC_EnableIRQ(USBHD_IRQn);
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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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NVIC_DisableIRQ(USBHD_IRQn);
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RingBuffer_Comm.StopFlag = 0;
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NVIC_EnableIRQ(USBHD_IRQn);
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USBOTG_FS->UEP1_RX_CTRL = (USBOTG_FS->UEP1_RX_CTRL & ~USBFS_UEP_R_RES_MASK) | USBFS_UEP_R_RES_ACK;
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}
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}
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}
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}
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}
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