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#include <string.h> |
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#include "ch32v20x.h" |
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#include "usb_lib.h" |
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#include "usb_regs.h" |
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#include "usb_desc.h" |
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#include "vcom_serial.h" |
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volatile VCOM Vcom; |
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VCOM_LINE_CODING LineCfg = {115200, 0, 0, 8}; // Baud rate, stop bits, parity bits, data bits |
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#define RXDMA_SZ (CDC_BULK_IN_SZ * 2) |
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uint8_t RXBuffer[RXDMA_SZ] __attribute__((aligned(4))); |
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uint8_t TXBuffer[CDC_BULK_OUT_SZ] __attribute__((aligned(4))); |
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void VCOM_Init(void) |
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{ |
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GPIO_InitTypeDef GPIO_InitStructure; |
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USART_InitTypeDef USART_InitStructure; |
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DMA_InitTypeDef DMA_InitStructure; |
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); |
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); |
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RCC_AHBPeriphClockCmd (RCC_AHBPeriph_DMA1, ENABLE); |
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; |
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; |
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; |
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GPIO_Init(GPIOA, &GPIO_InitStructure); // PA2 => USART2_TX |
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; |
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; |
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GPIO_Init(GPIOA, &GPIO_InitStructure); // PA3 => USART2_RX |
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; |
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DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART2->DATAR; |
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; |
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DMA_InitStructure.DMA_MemoryBaseAddr = (u32)TXBuffer; |
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; |
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; |
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; |
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DMA_InitStructure.DMA_BufferSize = 0; |
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DMA_InitStructure.DMA_Priority = DMA_Priority_High; |
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DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; |
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; |
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DMA_Init(DMA1_Channel7, &DMA_InitStructure); |
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DMA_Cmd(DMA1_Channel7, ENABLE); |
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; |
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DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART2->DATAR; |
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; |
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DMA_InitStructure.DMA_MemoryBaseAddr = (u32)RXBuffer; |
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; |
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; |
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; |
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DMA_InitStructure.DMA_BufferSize = RXDMA_SZ; |
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DMA_InitStructure.DMA_Priority = DMA_Priority_High; |
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; |
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; |
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DMA_Init(DMA1_Channel6, &DMA_InitStructure); |
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DMA_Cmd(DMA1_Channel6, ENABLE); |
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USART_InitStructure.USART_BaudRate = 115200; |
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USART_InitStructure.USART_WordLength = USART_WordLength_8b; |
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USART_InitStructure.USART_StopBits = USART_StopBits_1; |
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USART_InitStructure.USART_Parity = USART_Parity_No; |
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USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx; |
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; |
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USART_Init(USART2, &USART_InitStructure); |
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USART_DMACmd(USART2, USART_DMAReq_Tx | USART_DMAReq_Rx, ENABLE); |
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USART_Cmd(USART2, ENABLE); |
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} |
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void VCOM_LineCoding(VCOM_LINE_CODING * LineCfgx) |
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{ |
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USART_InitTypeDef USART_InitStructure; |
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switch(LineCfgx->u8DataBits) |
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{ |
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case 8: USART_InitStructure.USART_WordLength = USART_WordLength_8b; break; |
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default: USART_InitStructure.USART_WordLength = USART_WordLength_8b; break; |
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} |
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switch(LineCfgx->u8ParityType) |
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{ |
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case 0: USART_InitStructure.USART_Parity = USART_Parity_No; break; |
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case 1: USART_InitStructure.USART_Parity = USART_Parity_Odd; |
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USART_InitStructure.USART_WordLength = USART_WordLength_9b; break; |
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case 2: USART_InitStructure.USART_Parity = USART_Parity_Even; |
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USART_InitStructure.USART_WordLength = USART_WordLength_9b; break; |
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default: USART_InitStructure.USART_Parity = USART_Parity_No; break; |
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} |
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switch(LineCfgx->u8CharFormat) |
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{ |
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case 0: USART_InitStructure.USART_StopBits = USART_StopBits_1; break; |
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case 1: USART_InitStructure.USART_StopBits = USART_StopBits_1_5; break; |
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case 2: USART_InitStructure.USART_StopBits = USART_StopBits_2; break; |
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default: USART_InitStructure.USART_StopBits = USART_StopBits_1; break; |
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} |
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USART_InitStructure.USART_BaudRate = LineCfgx->u32DTERate; |
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USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx; |
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; |
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__disable_irq(); |
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USART_Init(USART2, &USART_InitStructure); |
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__enable_irq(); |
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} |
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extern volatile uint32_t SysTick_ms; |
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void VCOM_TransferData(void) |
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{ |
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static uint32_t last_ms = 0; |
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static uint32_t last_pos = 0; |
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if(Vcom.in_ready) // <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> |
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{ |
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uint32_t pos = RXDMA_SZ - DMA_GetCurrDataCounter(DMA1_Channel6); |
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if((pos - last_pos >= CDC_BULK_IN_SZ) || ((pos != last_pos) && (SysTick_ms != last_ms))) |
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{ |
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if(pos < last_pos) |
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pos = RXDMA_SZ; |
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if(pos - last_pos > CDC_BULK_IN_SZ) |
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pos = last_pos + CDC_BULK_IN_SZ; |
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Vcom.in_bytes = pos - last_pos; |
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Vcom.in_ready = 0; |
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USB_SIL_Write(EP3_IN, &RXBuffer[last_pos], Vcom.in_bytes); |
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SetEPTxValid(ENDP3); |
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last_pos = pos % RXDMA_SZ; |
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last_ms = SysTick_ms; |
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} |
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else |
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{ |
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/* Prepare a zero packet if previous packet size is CDC_BULK_IN_SZ and |
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no more data to send at this moment to note Host the transfer has been done */ |
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if(Vcom.in_bytes == CDC_BULK_IN_SZ) |
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{ |
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Vcom.in_bytes = 0; |
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USB_SIL_Write(EP3_IN, (uint8_t *)0, 0); |
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SetEPTxValid(ENDP3); |
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} |
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} |
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} |
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/* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>յ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DMA <EFBFBD>ѷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */ |
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if(Vcom.out_ready && (DMA_GetCurrDataCounter(DMA1_Channel7) == 0)) |
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{ |
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Vcom.out_ready = 0; |
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memcpy(TXBuffer, (uint8_t *)Vcom.out_buff, Vcom.out_bytes); |
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DMA_Cmd(DMA1_Channel7, DISABLE); |
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DMA_SetCurrDataCounter(DMA1_Channel7, Vcom.out_bytes); |
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DMA_Cmd(DMA1_Channel7, ENABLE); |
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/* Ready for next BULK OUT */ |
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SetEPRxValid(ENDP3); |
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} |
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}
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