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