90 lines
4.3 KiB
C
90 lines
4.3 KiB
C
/*
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* cdc.h
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*
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* Created on: Nov 6, 2024
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* Author: true
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*/
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#ifndef USER_USB_CDC_H_
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#define USER_USB_CDC_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include <string.h>
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// CDC buffer
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#define DEF_CDC_SEND_HOST_BUF_LEN ( 2 * 512 ) // device to host buffer size
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#define DEF_CDC_FROM_HOST_BUF_LEN ( 2 * 512 ) // host to device buffer size
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#define DEF_USB_FS_PACKET_LEN 64 // USB full speed mode packet size for CDC data
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#define DEF_CDC_FROM_HOST_BUF_NUM_MAX (DEF_CDC_FROM_HOST_BUF_LEN / DEF_USB_FS_PACKET_LEN) // Serial x transmit buffer size
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// CDC default settings
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#define DEF_CDC_BAUDRATE 115200 /* Default baud rate for serial port */
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#define DEF_CDC_STOPBIT 0 /* Default stop bit for serial port */
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#define DEF_CDC_PARITY 0 /* Default parity bit for serial port */
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#define DEF_CDC_DATABIT 8 /* Default data bit for serial port */
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typedef struct __attribute__((packed)) _UART_CTL
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{
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uint16_t send_host_ptr; // data location for data being added to the buffer
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uint16_t send_host_idx; // data location for data being sent over USB
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volatile uint16_t send_host_count; // amount of data to send
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uint16_t from_host_ptr;
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uint16_t from_host_idx;
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uint16_t from_host_count;
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volatile uint16_t Tx_LoadNum; /* Serial x data send buffer load number */
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volatile uint16_t Tx_DealNum; /* Serial x data send buffer processing number */
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volatile uint16_t from_host_remain; /* Serial x data send buffer remaining unprocessed number */
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volatile uint16_t Tx_PackLen[DEF_CDC_FROM_HOST_BUF_NUM_MAX]; /* The current packet length of the serial x data send buffer */
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uint8_t from_host_flag; /* Serial x data send status */
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uint8_t pad1;
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uint16_t Tx_CurPackLen; /* The current packet length sent by serial port x */
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uint16_t Tx_CurPackPtr; /* Pointer to the packet currently being sent by serial port x */
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uint8_t usb_send_host_flag; /* Serial xUSB packet being uploaded flag */
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uint8_t usb_send_host_zero_flag; /* Serial xUSB data needs to upload 0-length packet flag */
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uint8_t usb_from_host_stop_flag; /* Serial xUSB packet stop down flag */
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uint8_t pad2;
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uint8_t cdc_cfg[ 8 ]; /* Serial x parameter configuration (default baud rate is 115200, 1 stop bit, no parity, 8 data bits) */
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uint8_t usb_send_flag; /* Serial x interrupt upload status */
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uint8_t pad3;
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uint16_t USB_Int_UpTimeCount; /* Serial x interrupt upload timing */
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} CDC_CTL, *PCDC_CTL;
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/***********************************************************************************************************************/
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/* Constant, variable extents */
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/* The following are serial port transmit and receive related variables and buffers */
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extern volatile CDC_CTL Cdc; /* Serial x control related structure */
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extern __attribute__((aligned(4))) uint8_t cdc_from[DEF_CDC_FROM_HOST_BUF_LEN];
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extern __attribute__((aligned(4))) uint8_t cdc_send[DEF_CDC_SEND_HOST_BUF_LEN];
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/***********************************************************************************************************************/
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void CDC_USB_Init(void);
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void cdc_from_host_process(void);
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void cdc_send_host_process(void);
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int usb_cdc_puts(char *buf, int cnt);
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int usb_cdc_gets(char *buf, int cnt);
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#ifdef __cplusplus
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}
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#endif
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#endif /* USER_USB_CDC_H_ */
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