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660 lines
34 KiB
C
660 lines
34 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : CDC.C
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* Author : WCH
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* Version : V1.0
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* Date : 2017/03/01
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* Description : CH554 as CDC device to serial port, select serial port 1
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*******************************************************************************/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <ch554.h>
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#include <ch554_usb.h>
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#include <debug.h>
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__xdata __at (0x0000) uint8_t Ep0Buffer[DEFAULT_ENDP0_SIZE]; // Endpoint 0 OUT & IN buffer, must be an even address
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__xdata __at (0x0040) uint8_t Ep1Buffer[DEFAULT_ENDP1_SIZE]; //Endpoint 1 upload buffer
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__xdata __at (0x0080) uint8_t Ep2Buffer[2*MAX_PACKET_SIZE]; //Endpoint 2 IN & OUT buffer, must be an even address
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uint16_t SetupLen;
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uint8_t SetupReq,Count,UsbConfig;
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const uint8_t * pDescr; //USB configuration flag
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USB_SETUP_REQ SetupReqBuf; //Temporary Setup package
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#define UsbSetupBuf ((PUSB_SETUP_REQ)Ep0Buffer)
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#define SET_LINE_CODING 0X20 // Configures DTE rate, stop-bits, parity, and number-of-character
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#define GET_LINE_CODING 0X21 // This request allows the host to find out the currently configured line coding.
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#define SET_CONTROL_LINE_STATE 0X22 // This request generates RS-232/V.24 style control signals.
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/*设备描述符*/
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__code uint8_t DevDesc[] = {0x12,0x01,0x10,0x01,0x02,0x00,0x00,DEFAULT_ENDP0_SIZE,
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// 0x86,0x1a, // VID
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// 0x22,0x57, // PID
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0x07,0x12, // VID
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0x87,0x88, // PID
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0x00,0x01,0x01,0x02,
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0x03,0x01
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};
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__code uint8_t CfgDesc[] ={
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0x09,0x02,0x43,0x00,0x02,0x01,0x00,0xa0,0x32, //Configuration descriptor (two interfaces)
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// The following is the interface 0 (CDC interface) descriptor
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0x09,0x04,0x00,0x00,0x01,0x02,0x02,0x01,0x00, // CDC interface descriptor (one endpoint)
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//The following is the function descriptor
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0x05,0x24,0x00,0x10,0x01, //Function descriptor (header)
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0x05,0x24,0x01,0x00,0x00, //Management descriptor (no data interface) 03 01
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0x04,0x24,0x02,0x02, //stand by,Set_Line_Coding、Set_Control_Line_State、Get_Line_Coding、Serial_State
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0x05,0x24,0x06,0x00,0x01, //CDC interface numbered 0; data interface numbered 1
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0x07,0x05,0x81,0x03,0x08,0x00,0xFF, //Interrupt upload endpoint descriptor
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//The following is the interface 1 (data interface) descriptor
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0x09,0x04,0x01,0x00,0x02,0x0a,0x00,0x00,0x00, //Data interface descriptor
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0x07,0x05,0x02,0x02,0x40,0x00,0x00, //Endpoint descriptor
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0x07,0x05,0x82,0x02,0x40,0x00,0x00, //Endpoint descriptor
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};
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/*字符串描述符*/
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unsigned char __code LangDes[]={0x04,0x03,0x09,0x04}; //Language descriptor
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#include "usb_strings.h"
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//unsigned char __code SerDes[]={ //Serial number string descriptor
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// 0x14,0x03,
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// 0x32,0x00,0x30,0x00,0x31,0x00,0x37,0x00,0x2D,0x00,
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// 0x32,0x00,0x2D,0x00,
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// 0x32,0x00,0x35,0x00
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// };
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//unsigned char __code Prod_Des[]={ //Product string descriptor
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// 0x14,0x03,
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// 0x43,0x00,0x48,0x00,0x35,0x00,0x35,0x00,0x34,0x00,0x5F,0x00,
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// 0x43,0x00,0x44,0x00,0x43,0x00,
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// };
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//unsigned char __code Manuf_Des[]={
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// 0x0A,0x03,
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// 0x5F,0x6c,0xCF,0x82,0x81,0x6c,0x52,0x60,
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//};
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//cdc参数
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__xdata uint8_t LineCoding[7]={0x00,0xe1,0x00,0x00,0x00,0x00,0x08}; //The initial baud rate is 57600, 1 stop bit, no parity, 8 data bits.
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#define UART_REV_LEN 64 //Serial receive buffer size
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__idata uint8_t Receive_Uart_Buf[UART_REV_LEN]; //Serial receive buffer
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volatile __idata uint8_t Uart_Input_Point = 0; //Circular buffer write pointer, bus reset needs to be initialized to 0
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volatile __idata uint8_t Uart_Output_Point = 0; //Take pointer out of circular buffer, bus reset needs to be initialized to 0
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volatile __idata uint8_t UartByteCount = 0; //Number of bytes remaining in the current buffer
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volatile __idata uint8_t USBByteCount = 0; //Represents the data received by the USB endpoint
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volatile __idata uint8_t USBBufOutPoint = 0; //Fetch data pointer
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volatile __idata uint8_t UpPoint2_Busy = 0; //Whether the upload endpoint is busy
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/*******************************************************************************
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* Function Name : USBDeviceCfg()
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* Description : USB device mode configuration
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void USBDeviceCfg()
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{
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USB_CTRL = 0x00; //Clear USB control register
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USB_CTRL &= ~bUC_HOST_MODE; //This bit selects the device mode
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USB_CTRL |= bUC_DEV_PU_EN | bUC_INT_BUSY | bUC_DMA_EN; //USB device and internal pull-up enable, automatically return to NAK before interrupt flag is cleared
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USB_DEV_AD = 0x00; //Device address initialization
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// USB_CTRL |= bUC_LOW_SPEED;
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// UDEV_CTRL |= bUD_LOW_SPEED; //Select low speed 1.5M mode
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USB_CTRL &= ~bUC_LOW_SPEED;
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UDEV_CTRL &= ~bUD_LOW_SPEED; //Select full speed 12M mode, the default mode
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UDEV_CTRL = bUD_PD_DIS; // Disable DP / DM pull-down resistor
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UDEV_CTRL |= bUD_PORT_EN; //Enable physical port
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}
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/*******************************************************************************
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* Function Name : USBDeviceIntCfg()
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* Description : USB device mode interrupt initialization
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void USBDeviceIntCfg()
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{
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USB_INT_EN |= bUIE_SUSPEND; //Enable device suspend interrupt
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USB_INT_EN |= bUIE_TRANSFER; //Enable USB transfer completion interrupt
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USB_INT_EN |= bUIE_BUS_RST; //Enable device mode USB bus reset interrupt
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USB_INT_FG |= 0x1F; //Clear interrupt flag
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IE_USB = 1; //Enable USB interrupt
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EA = 1; //Allow microcontroller interrupt
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}
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/*******************************************************************************
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* Function Name : USBDeviceEndPointCfg()
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* Description : USB device mode endpoint configuration, simulation compatible HID device, in addition to endpoint 0 control transmission, also includes endpoint 2 batch upload
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void USBDeviceEndPointCfg()
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{
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// TODO: Is casting the right thing here? What about endianness?
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UEP1_DMA = (uint16_t) Ep1Buffer; //Endpoint 1 sends data transfer address
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UEP2_DMA = (uint16_t) Ep2Buffer; //Endpoint 2 IN data transfer address
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UEP2_3_MOD = 0xCC; //Endpoint 2/3 single buffer transceiver enable
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UEP2_CTRL = bUEP_AUTO_TOG | UEP_T_RES_NAK | UEP_R_RES_ACK; //Endpoint 2 automatically flips the synchronization flag, IN transaction returns NAK, OUT returns ACK
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UEP1_CTRL = bUEP_AUTO_TOG | UEP_T_RES_NAK; //Endpoint 1 automatically flips the synchronization flag, IN transaction returns NAK
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UEP0_DMA = (uint16_t) Ep0Buffer; //Endpoint 0 data transfer address
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UEP4_1_MOD = 0X40; //Endpoint 1 upload buffer; endpoint 0 single 64-byte send and receive buffer
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UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK; //Manual flip, OUT transaction returns ACK, IN transaction returns NAK
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}
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/*******************************************************************************
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* Function Name : Config_Uart1(uint8_t *cfg_uart)
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* Description : Configure serial port 1 parameters
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* Input : Serial port configuration parameters Four bit baud rate, stop bit, parity, data bit
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* Output : None
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* Return : None
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*******************************************************************************/
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void Config_Uart1(uint8_t *cfg_uart)
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{
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uint32_t uart1_buad = 0;
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*((uint8_t *)&uart1_buad) = cfg_uart[0];
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*((uint8_t *)&uart1_buad+1) = cfg_uart[1];
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*((uint8_t *)&uart1_buad+2) = cfg_uart[2];
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*((uint8_t *)&uart1_buad+3) = cfg_uart[3];
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SBAUD1 = 256 - FREQ_SYS/16/uart1_buad; // SBAUD1 = 256 - Fsys / 16 / baud rate
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IE_UART1 = 1;
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}
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/*******************************************************************************
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* Function Name : DeviceInterrupt()
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* Description : CH559USB interrupt processing function
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*******************************************************************************/
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void DeviceInterrupt(void) __interrupt (INT_NO_USB) //USB interrupt service routine, using register set 1
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{
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uint16_t len;
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if(UIF_TRANSFER) //USB transfer complete flag
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{
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switch (USB_INT_ST & (MASK_UIS_TOKEN | MASK_UIS_ENDP))
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{
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case UIS_TOKEN_IN | 1: //endpoint 1# Endpoint interrupts upload
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UEP1_T_LEN = 0;
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UEP1_CTRL = UEP1_CTRL & ~ MASK_UEP_T_RES | UEP_T_RES_NAK; //Default answer NAK
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break;
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case UIS_TOKEN_IN | 2: //endpoint 2# Endpoint bulk upload
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{
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UEP2_T_LEN = 0; //The pre-used sending length must be cleared
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UEP2_CTRL = UEP2_CTRL & ~ MASK_UEP_T_RES | UEP_T_RES_NAK; //Default answer NAK
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UpPoint2_Busy = 0; //clear busy flag
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}
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break;
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case UIS_TOKEN_OUT | 2: //endpoint 3# Endpoint batch download
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if ( U_TOG_OK ) // Out-of-sync packets will be dropped
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{
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USBByteCount = USB_RX_LEN; // Grads length of recieved data
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UEP2_CTRL = UEP2_CTRL & ~ MASK_UEP_R_RES | UEP_R_RES_NAK; //NAK after receiving a packet of data, the main function finishes processing, and the main function modifies the response mode
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}
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break;
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case UIS_TOKEN_SETUP | 0: //SETUP routine
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len = USB_RX_LEN;
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if(len == (sizeof(USB_SETUP_REQ)))
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{
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SetupLen = ((uint16_t)UsbSetupBuf->wLengthH<<8) | (UsbSetupBuf->wLengthL);
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len = 0; // Defaults to success and uploading 0 length
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SetupReq = UsbSetupBuf->bRequest;
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if ( ( UsbSetupBuf->bRequestType & USB_REQ_TYP_MASK ) != USB_REQ_TYP_STANDARD )// non-standard request
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{
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switch( SetupReq )
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{
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case GET_LINE_CODING: //0x21 currently configured
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pDescr = LineCoding;
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len = sizeof(LineCoding);
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len = SetupLen >= DEFAULT_ENDP0_SIZE ? DEFAULT_ENDP0_SIZE : SetupLen; // The length of this transmission
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memcpy(Ep0Buffer,pDescr,len);
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SetupLen -= len;
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pDescr += len;
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break;
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case SET_CONTROL_LINE_STATE: //0x22 generates RS-232/V.24 style control signals
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break;
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case SET_LINE_CODING: //0x20 Configure
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break;
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default:
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len = 0xFF; /*Command not supported*/
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break;
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}
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}
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else //Standard request
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{
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switch(SetupReq) //Request code
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{
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case USB_GET_DESCRIPTOR:
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switch(UsbSetupBuf->wValueH)
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{
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case 1: // device descriptor
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pDescr = DevDesc; //Send the device descriptor to the buffer to be sent
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len = sizeof(DevDesc);
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break;
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case 2: //configuration descriptor
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pDescr = CfgDesc; //Send the device descriptor to the buffer to be sent
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len = sizeof(CfgDesc);
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break;
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case 3:
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if(UsbSetupBuf->wValueL == 0)
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{
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pDescr = LangDes;
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len = sizeof(LangDes);
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}
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else if(UsbSetupBuf->wValueL == 1)
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{
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pDescr = Manuf_Des;
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len = sizeof(Manuf_Des);
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}
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else if(UsbSetupBuf->wValueL == 2)
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{
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pDescr = Prod_Des;
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len = sizeof(Prod_Des);
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}
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else
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{
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pDescr = SerDes;
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len = sizeof(SerDes);
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}
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break;
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default:
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len = 0xff; //Unsupported command or error
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break;
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}
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if ( SetupLen > len )
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{
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SetupLen = len; //Limit total length
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}
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len = SetupLen >= DEFAULT_ENDP0_SIZE ? DEFAULT_ENDP0_SIZE : SetupLen; //This transmission length
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memcpy(Ep0Buffer,pDescr,len); //Load upload data
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SetupLen -= len;
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pDescr += len;
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break;
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case USB_SET_ADDRESS:
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SetupLen = UsbSetupBuf->wValueL; //Temporary storage of USB device address
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break;
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case USB_GET_CONFIGURATION:
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Ep0Buffer[0] = UsbConfig;
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if ( SetupLen >= 1 )
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{
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len = 1;
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}
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break;
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case USB_SET_CONFIGURATION:
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UsbConfig = UsbSetupBuf->wValueL;
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break;
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case USB_GET_INTERFACE:
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break;
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case USB_CLEAR_FEATURE: //Clear Feature
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if( ( UsbSetupBuf->bRequestType & 0x1F ) == USB_REQ_RECIP_DEVICE ) /* Remove device */
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{
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if( ( ( ( uint16_t )UsbSetupBuf->wValueH << 8 ) | UsbSetupBuf->wValueL ) == 0x01 )
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{
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if( CfgDesc[ 7 ] & 0x20 )
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{
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/* Wake */
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}
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else
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{
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len = 0xFF; /* operation failed */
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}
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}
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else
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{
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len = 0xFF; /* operation failed */
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}
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}
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else if ( ( UsbSetupBuf->bRequestType & USB_REQ_RECIP_MASK ) == USB_REQ_RECIP_ENDP )// endpoint
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{
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switch( UsbSetupBuf->wIndexL )
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{
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case 0x83:
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UEP3_CTRL = UEP3_CTRL & ~ ( bUEP_T_TOG | MASK_UEP_T_RES ) | UEP_T_RES_NAK;
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break;
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case 0x03:
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UEP3_CTRL = UEP3_CTRL & ~ ( bUEP_R_TOG | MASK_UEP_R_RES ) | UEP_R_RES_ACK;
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break;
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case 0x82:
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UEP2_CTRL = UEP2_CTRL & ~ ( bUEP_T_TOG | MASK_UEP_T_RES ) | UEP_T_RES_NAK;
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break;
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case 0x02:
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UEP2_CTRL = UEP2_CTRL & ~ ( bUEP_R_TOG | MASK_UEP_R_RES ) | UEP_R_RES_ACK;
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break;
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case 0x81:
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UEP1_CTRL = UEP1_CTRL & ~ ( bUEP_T_TOG | MASK_UEP_T_RES ) | UEP_T_RES_NAK;
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break;
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case 0x01:
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UEP1_CTRL = UEP1_CTRL & ~ ( bUEP_R_TOG | MASK_UEP_R_RES ) | UEP_R_RES_ACK;
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break;
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default:
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len = 0xFF; // Unsupported endpoint
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break;
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}
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}
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else
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{
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len = 0xFF; // It's not that the endpoint doesn't support it
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}
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break;
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case USB_SET_FEATURE: /* Set Feature */
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if( ( UsbSetupBuf->bRequestType & 0x1F ) == USB_REQ_RECIP_DEVICE ) /* Set up the device */
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{
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if( ( ( ( uint16_t )UsbSetupBuf->wValueH << 8 ) | UsbSetupBuf->wValueL ) == 0x01 )
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{
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if( CfgDesc[ 7 ] & 0x20 )
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{
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/* hibernate */
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#ifdef DE_PRINTF
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printf( "suspend\n" ); //sleep state
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#endif
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while ( XBUS_AUX & bUART0_TX )
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{
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; //等待发送完成
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}
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SAFE_MOD = 0x55;
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SAFE_MOD = 0xAA;
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WAKE_CTRL = bWAK_BY_USB | bWAK_RXD0_LO | bWAK_RXD1_LO; //USB or RXD0/1 can be woken up when there is a signal
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PCON |= PD; // sleep
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SAFE_MOD = 0x55;
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SAFE_MOD = 0xAA;
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WAKE_CTRL = 0x00;
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}
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else
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{
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len = 0xFF; /* operation failed */
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}
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}
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else
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{
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len = 0xFF; /* operation failed */
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}
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}
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else if( ( UsbSetupBuf->bRequestType & 0x1F ) == USB_REQ_RECIP_ENDP ) /* Set endpoint */
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{
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if( ( ( ( uint16_t )UsbSetupBuf->wValueH << 8 ) | UsbSetupBuf->wValueL ) == 0x00 )
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{
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switch( ( ( uint16_t )UsbSetupBuf->wIndexH << 8 ) | UsbSetupBuf->wIndexL )
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{
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case 0x83:
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UEP3_CTRL = UEP3_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL;/* Set endpoint 3 IN STALL */
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break;
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case 0x03:
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UEP3_CTRL = UEP3_CTRL & (~bUEP_R_TOG) | UEP_R_RES_STALL;/* Set endpoint 3 OUT Stall */
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break;
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case 0x82:
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UEP2_CTRL = UEP2_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL;/* Set endpoint 2 IN STALL */
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break;
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case 0x02:
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UEP2_CTRL = UEP2_CTRL & (~bUEP_R_TOG) | UEP_R_RES_STALL;/* Set endpoint 2 OUT Stall */
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break;
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case 0x81:
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UEP1_CTRL = UEP1_CTRL & (~bUEP_T_TOG) | UEP_T_RES_STALL;/* Set endpoint 1 IN STALL */
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break;
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case 0x01:
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UEP1_CTRL = UEP1_CTRL & (~bUEP_R_TOG) | UEP_R_RES_STALL;/* Set endpoint 1 OUT Stall */
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default:
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len = 0xFF; /* operation failed */
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break;
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}
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}
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else
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{
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len = 0xFF; /* operation failed */
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}
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}
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else
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{
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len = 0xFF; /* operation failed */
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}
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break;
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case USB_GET_STATUS:
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Ep0Buffer[0] = 0x00;
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Ep0Buffer[1] = 0x00;
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if ( SetupLen >= 2 )
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{
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len = 2;
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}
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else
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{
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len = SetupLen;
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}
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break;
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default:
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len = 0xff; //operation failed
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
len = 0xff; //Packet length error
|
||
}
|
||
if(len == 0xff)
|
||
{
|
||
SetupReq = 0xFF;
|
||
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_STALL | UEP_T_RES_STALL;//STALL
|
||
}
|
||
else if(len <= DEFAULT_ENDP0_SIZE) //Upload data or status phase returns 0 length packet
|
||
{
|
||
UEP0_T_LEN = len;
|
||
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_ACK | UEP_T_RES_ACK;//The default packet is DATA1，Return response ACK
|
||
}
|
||
else
|
||
{
|
||
UEP0_T_LEN = 0; //Although it has not yet reached the status stage, it is preset to upload 0-length data packets in advance to prevent the host from entering the status stage early.
|
||
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_ACK | UEP_T_RES_ACK; //The default data packet is DATA1, and the response ACK is returned
|
||
}
|
||
break;
|
||
case UIS_TOKEN_IN | 0: //endpoint0 IN
|
||
switch(SetupReq)
|
||
{
|
||
case USB_GET_DESCRIPTOR:
|
||
len = SetupLen >= DEFAULT_ENDP0_SIZE ? DEFAULT_ENDP0_SIZE : SetupLen; //The length of this transmission
|
||
memcpy( Ep0Buffer, pDescr, len ); //Load upload data
|
||
SetupLen -= len;
|
||
pDescr += len;
|
||
UEP0_T_LEN = len;
|
||
UEP0_CTRL ^= bUEP_T_TOG; //Sync flag flip
|
||
break;
|
||
case USB_SET_ADDRESS:
|
||
USB_DEV_AD = USB_DEV_AD & bUDA_GP_BIT | SetupLen;
|
||
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
|
||
break;
|
||
default:
|
||
UEP0_T_LEN = 0; //The status phase is completed and interrupted or the 0-length data packet is forced to be uploaded to end the control transmission.
|
||
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
|
||
break;
|
||
}
|
||
break;
|
||
case UIS_TOKEN_OUT | 0: // endpoint0 OUT
|
||
if(SetupReq ==SET_LINE_CODING) // Set serial port properties
|
||
{
|
||
if( U_TOG_OK )
|
||
{
|
||
memcpy(LineCoding,UsbSetupBuf,USB_RX_LEN);
|
||
Config_Uart1(LineCoding);
|
||
UEP0_T_LEN = 0;
|
||
UEP0_CTRL |= UEP_R_RES_ACK | UEP_T_RES_ACK; // Prepare to upload 0 packages
|
||
}
|
||
}
|
||
else
|
||
{
|
||
UEP0_T_LEN = 0;
|
||
UEP0_CTRL |= UEP_R_RES_ACK | UEP_T_RES_NAK; // Status phase, responds to IN with NAK
|
||
}
|
||
break;
|
||
|
||
|
||
|
||
default:
|
||
break;
|
||
}
|
||
UIF_TRANSFER = 0; //Writing 0 clears the interrupt
|
||
}
|
||
if(UIF_BUS_RST) //Device mode USB bus reset interrupt
|
||
{
|
||
#ifdef DE_PRINTF
|
||
printf( "reset\n" ); //sleep state
|
||
#endif
|
||
UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
|
||
UEP1_CTRL = bUEP_AUTO_TOG | UEP_T_RES_NAK;
|
||
UEP2_CTRL = bUEP_AUTO_TOG | UEP_T_RES_NAK | UEP_R_RES_ACK;
|
||
USB_DEV_AD = 0x00;
|
||
UIF_SUSPEND = 0;
|
||
UIF_TRANSFER = 0;
|
||
UIF_BUS_RST = 0; //clear interrupt flag
|
||
Uart_Input_Point = 0; //Circular buffer input pointer
|
||
Uart_Output_Point = 0; //Circular buffer read pointer
|
||
UartByteCount = 0; //The number of bytes remaining in the current buffer to be fetched
|
||
USBByteCount = 0; //USB endpoint received length
|
||
UsbConfig = 0; //Clear configuration values
|
||
UpPoint2_Busy = 0;
|
||
}
|
||
if (UIF_SUSPEND) //USB bus suspend/wake completed
|
||
{
|
||
UIF_SUSPEND = 0;
|
||
if ( USB_MIS_ST & bUMS_SUSPEND ) //hang
|
||
{
|
||
#ifdef DE_PRINTF
|
||
printf( "suspend\n" ); //sleep state
|
||
#endif
|
||
while ( XBUS_AUX & bUART0_TX )
|
||
{
|
||
; //Wait for sending to complete
|
||
}
|
||
SAFE_MOD = 0x55;
|
||
SAFE_MOD = 0xAA;
|
||
WAKE_CTRL = bWAK_BY_USB | bWAK_RXD0_LO | bWAK_RXD1_LO; //Can be woken up when there is a signal from USB or RXD0/1
|
||
PCON |= PD; //sleep
|
||
SAFE_MOD = 0x55;
|
||
SAFE_MOD = 0xAA;
|
||
WAKE_CTRL = 0x00;
|
||
}
|
||
}
|
||
else { //Unexpected interruption, impossible situation
|
||
USB_INT_FG = 0xFF; //clear interrupt flag
|
||
|
||
}
|
||
}
|
||
/*******************************************************************************
|
||
* Function Name : Uart1_ISR()
|
||
* Description : Serial port receiving interrupt function to realize circular buffer receiving
|
||
*******************************************************************************/
|
||
void Uart1_ISR(void) __interrupt (INT_NO_UART1)
|
||
{
|
||
if(U1RI) //data received
|
||
{
|
||
Receive_Uart_Buf[Uart_Input_Point++] = SBUF1;
|
||
if(Uart_Input_Point>=UART_REV_LEN) {
|
||
Uart_Input_Point = 0; //Write pointer
|
||
}
|
||
U1RI = 0;
|
||
}
|
||
|
||
}
|
||
|
||
uint8_t uart_byte_count() {
|
||
uint8_t in = Uart_Input_Point;
|
||
uint8_t out = Uart_Output_Point;
|
||
|
||
if (in < out) {
|
||
in = in + UART_REV_LEN;
|
||
}
|
||
|
||
return in - out;
|
||
}
|
||
|
||
//main function
|
||
main()
|
||
{
|
||
uint8_t length;
|
||
uint8_t Uart_Timeout = 0;
|
||
uint8_t USB_output_buffer[64] = {0};
|
||
uint8_t USB_output_buffer_remain = 0;
|
||
CfgFsys( ); // CH559 clock selection configuration
|
||
mDelaymS(5); // Modify the main frequency and wait for the internal crystal to stabilize, which must be added
|
||
mInitSTDIO( ); // Serial port 0, can be used for debugging
|
||
UART1Setup( ); // For CDC
|
||
|
||
#ifdef DE_PRINTF
|
||
printf("start ...\n");
|
||
#endif
|
||
USBDeviceCfg();
|
||
USBDeviceEndPointCfg(); // Endpoint configuration
|
||
USBDeviceIntCfg(); //Interrupt initialization
|
||
UEP0_T_LEN = 0;
|
||
UEP1_T_LEN = 0; //Pre-use send length must be cleared
|
||
UEP2_T_LEN = 0; //Pre-use send length must be cleared
|
||
|
||
// Enable GPIO debugging on p1.4 and p1.5
|
||
// gpio_init();
|
||
// gpio_unset(0x10);
|
||
// gpio_unset(0x20);
|
||
|
||
while(1)
|
||
{
|
||
if(UsbConfig)
|
||
{
|
||
if(USBByteCount) // USB receiving endpoint has data
|
||
{
|
||
memcpy(USB_output_buffer, Ep2Buffer, USBByteCount);
|
||
USB_output_buffer_remain = USBByteCount;
|
||
USBBufOutPoint = 0;
|
||
USBByteCount = 0;
|
||
}
|
||
|
||
if(USB_output_buffer_remain)
|
||
{
|
||
CH554UART1SendByte(USB_output_buffer[USBBufOutPoint++]);
|
||
USB_output_buffer_remain--;
|
||
|
||
if(USB_output_buffer_remain==0) {
|
||
UEP2_CTRL = UEP2_CTRL & ~ MASK_UEP_R_RES | UEP_R_RES_ACK;
|
||
}
|
||
}
|
||
|
||
UartByteCount = uart_byte_count();
|
||
if(UartByteCount) {
|
||
Uart_Timeout++;
|
||
}
|
||
|
||
if(!UpPoint2_Busy) // The endpoint is not busy (the first packet of data after idle, only used to trigger upload)
|
||
{
|
||
length = UartByteCount;
|
||
if(length>0)
|
||
{
|
||
if(length>39 || Uart_Timeout>100)
|
||
{
|
||
|
||
Uart_Timeout = 0;
|
||
// if we reach a wrap-around, just transmit from index to end of buffer.
|
||
// The rest goes in next packet, i.e., not handling wrap-around.
|
||
if(Uart_Output_Point+length>UART_REV_LEN) {
|
||
length = UART_REV_LEN-Uart_Output_Point;
|
||
}
|
||
// write upload endpoint
|
||
memcpy(Ep2Buffer+MAX_PACKET_SIZE,&Receive_Uart_Buf[Uart_Output_Point],length);
|
||
|
||
Uart_Output_Point+=length;
|
||
|
||
if (Uart_Output_Point>=UART_REV_LEN) {
|
||
Uart_Output_Point = 0;
|
||
}
|
||
|
||
UEP2_T_LEN = length; // Pre-use send length must be cleared
|
||
UEP2_CTRL = UEP2_CTRL & ~ MASK_UEP_T_RES | UEP_T_RES_ACK; // Answer ACK
|
||
UpPoint2_Busy = 1;
|
||
|
||
// Should according to the USB-spec check if
|
||
// length == 64, if so we should send a
|
||
// zero-length USB packet. This is very
|
||
// unlikley to happen.
|
||
}
|
||
}
|
||
}
|
||
// Should have a timeout if the transfer for some reason
|
||
// fails to reset UpPoint2_Busy. But does not seem to
|
||
// happen.
|
||
}
|
||
}
|
||
}
|