esp-idf/components/esp_rom/include/esp32s2/rom/usb/cdc_acm.h
2023-01-19 10:09:09 +08:00

252 lines
6.5 KiB
C

/*******************************************************************************
*
* Copyright(c) 2015,2016 Intel Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************/
#pragma once
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef void cdc_acm_device;
extern cdc_acm_device *uart_acm_dev;
#define ACM_BYTES_PER_TX 64
//ACM statuses are negative to distinguish from USB_DC_* status codes
#define ACM_STATUS_LINESTATE_CHANGED -1
#define ACM_STATUS_LINECODING_CHANGED -2
#define ACM_STATUS_TX -3
#define ACM_STATUS_RX -4
typedef void(*uart_irq_callback_t)(cdc_acm_device *dev, int status);
/**
* @brief Get amount of received characters in buffer
*
* @returns character count
*/
int cdc_acm_rx_fifo_cnt(cdc_acm_device *dev);
/*
* @brief Output a character in polled mode.
*
* The UART poll method for USB UART is simulated by waiting till
* we get the next BULK In upcall from the USB device controller or 100 ms.
*
* @return the same character which is sent
*/
unsigned char cdc_acm_poll_out(cdc_acm_device *dev, unsigned char c);
/**
* @brief Fill FIFO with data
*
* @param dev CDC ACM device struct.
* @param tx_data Data to transmit.
* @param len Number of bytes to send.
*
* @return Number of bytes sent.
*/
int cdc_acm_fifo_fill(cdc_acm_device *dev, const uint8_t *tx_data, int len);
/**
* @brief Read data from FIFO
*
* @param dev CDC ACM device struct.
* @param rx_data Pointer to data container.
* @param size Container size.
*
* @return Number of bytes read.
*/
int cdc_acm_fifo_read(cdc_acm_device *dev, uint8_t *rx_data, const int size);
/**
* @brief Enable TX interrupt
*
* @param dev CDC ACM device struct.
*
* @return N/A.
*/
void cdc_acm_irq_tx_enable(cdc_acm_device *dev);
/**
* @brief Disable TX interrupt
*
* @param dev CDC ACM device struct.
*
* @return N/A.
*/
void cdc_acm_irq_tx_disable(cdc_acm_device *dev);
/**
* @brief Check if Tx IRQ has been raised
*
* @param dev CDC ACM device struct.
*
* @return 1 if a Tx IRQ is pending, 0 otherwise.
*/
int cdc_acm_irq_tx_ready(cdc_acm_device *dev);
/**
* @brief Enable RX interrupt
*
* @param dev CDC ACM device struct.
*
* @return N/A
*/
void cdc_acm_irq_rx_enable(cdc_acm_device *dev);
/**
* @brief Disable RX interrupt
*
* @param dev CDC ACM device struct.
*
* @return N/A.
*/
void cdc_acm_irq_rx_disable(cdc_acm_device *dev);
/**
* @brief Enable line state interrupt
*
* @param dev CDC ACM device struct.
*
* @return N/A.
*/
void cdc_acm_irq_state_enable(cdc_acm_device *dev);
/**
* @brief Disable line state interrupt
*
* @param dev CDC ACM device struct.
*
* @return N/A.
*/
void cdc_acm_irq_state_disable(cdc_acm_device *dev);
/**
* @brief Check if Rx IRQ has been raised
*
* @param dev CDC ACM device struct.
*
* @return 1 if an IRQ is ready, 0 otherwise.
*/
int cdc_acm_irq_rx_ready(cdc_acm_device *dev);
/**
* @brief Check if Tx or Rx IRQ is pending
*
* @param dev CDC ACM device struct.
*
* @return 1 if a Tx or Rx IRQ is pending, 0 otherwise.
*/
int cdc_acm_irq_is_pending(cdc_acm_device *dev);
/**
* @brief Set the callback function pointer for IRQ.
*
* @param dev CDC ACM device struct.
* @param cb Callback function pointer.
*
* @return N/A
*/
void cdc_acm_irq_callback_set(cdc_acm_device *dev, uart_irq_callback_t cb);
/**
* @brief Manipulate line control for UART.
*
* @param dev CDC ACM device struct
* @param ctrl The line control to be manipulated
* @param val Value to set the line control
*
* @return 0 if successful, failed otherwise.
*/
int cdc_acm_line_ctrl_set(cdc_acm_device *dev, uint32_t ctrl, uint32_t val);
/**
* @brief Manipulate line control for UART.
*
* @param dev CDC ACM device struct
* @param ctrl The line control to be manipulated
* @param val Value to set the line control
*
* @return 0 if successful, failed otherwise.
*/
int cdc_acm_line_ctrl_get(cdc_acm_device *dev, uint32_t ctrl, uint32_t *val);
/**
* @brief Initialize UART channel
*
* This routine is called to reset the chip in a quiescent state.
* It is assumed that this function is called only once per UART.
*
* @param mem_chunk Memory chunk to use for internal use
* @param mem_chunk_size Size of the memory chunk in bytes
*
* @return dev or NULL
*/
cdc_acm_device *cdc_acm_init(void *mem_chunk, int mem_chunk_size);
/** Common line controls for UART.*/
#define LINE_CTRL_BAUD_RATE (1 << 0)
#define LINE_CTRL_RTS (1 << 1)
#define LINE_CTRL_DTR (1 << 2)
#define LINE_CTRL_DCD (1 << 3)
#define LINE_CTRL_DSR (1 << 4)
/* Common communication errors for UART.*/
/** @brief Overrun error */
#define UART_ERROR_OVERRUN (1 << 0)
/** @brief Parity error */
#define UART_ERROR_PARITY (1 << 1)
/** @brief Framing error */
#define UART_ERROR_FRAMING (1 << 2)
/**
* @brief Break interrupt error:
*
* A break interrupt was received. This happens when the serial input is
* held at a logic '0' state for longer than the sum of start time + data bits
* + parity + stop bits.
*/
#define UART_ERROR_BREAK (1 << 3)
#ifdef __cplusplus
}
#endif