add CH32V203 porting

CH32V203/src/vcom_serial.h

@@ -0,0 +1,46 @@
+#ifndef __VCOM_SERIAL_H__
+#define __VCOM_SERIAL_H__
+
+
+#define RX_BUFF_SIZE    1024 	// RX buffer size
+#define TX_BUFF_SIZE    1024 	// RX buffer size
+
+typedef struct {
+	uint8_t  rx_buff[RX_BUFF_SIZE];
+	uint16_t rx_bytes;
+	uint16_t rx_wrptr;
+	uint16_t rx_rdptr;
+	uint8_t  tx_buff[TX_BUFF_SIZE];
+	uint16_t tx_bytes;
+	uint16_t tx_wrptr;
+	uint16_t tx_rdptr;
+	
+	uint16_t hw_flow;			// BIT0: DTR(Data Terminal Ready) , BIT1: RTS(Request To Send)
+	
+	uint8_t  in_buff[64];
+	uint16_t in_bytes;
+	uint16_t in_ready;
+	uint8_t  out_buff[64];
+	uint16_t out_bytes;
+	uint16_t out_ready;
+} VCOM;
+
+extern volatile VCOM Vcom;
+
+
+typedef struct __attribute__((packed)) {
+    uint32_t u32DTERate;     	// Baud rate
+    uint8_t  u8CharFormat;   	// stop bit:  0 - 1 Stop bit, 1 - 1.5 Stop bits, 2 - 2 Stop bits
+    uint8_t  u8ParityType;   	// parity:    0 - None, 1 - Odd, 2 - Even, 3 - Mark, 4 - Space
+    uint8_t  u8DataBits;     	// data bits: 5, 6, 7, 8, 16
+} VCOM_LINE_CODING;
+
+extern VCOM_LINE_CODING LineCfg;
+
+
+void VCOM_Init(void);
+void VCOM_TransferData(void);
+void VCOM_LineCoding(VCOM_LINE_CODING * LineCfgx);
+
+
+#endif // __VCOM_SERIAL_H__