Implementation of UHI Communication Device Class

Class internal implementation.

Data Structures
struct	uhi_cdc_buf_t
	Internal buffer information. More...
struct	uhi_cdc_dev_t
	USB CDC device information. More...
struct	uhi_cdc_line_t
	Communication line information. More...
struct	uhi_cdc_port_t
	Communication port information. More...

Internal defines and variables to manage CDC device
static uhi_cdc_dev_t	uhi_cdc_dev
	Information about the enumerated USB CDC device. More...

Internal routines
static void	uhi_cdc_free_device (void)
	Free all CDC device structures. More...
static uhi_cdc_port_t *	uhi_cdc_get_port (uint8_t port_num)
	Returns a port structure information. More...
static bool	uhi_cdc_set_conf (uint8_t port, usb_cdc_line_coding_t *configuration)
	Changes the port configuration. More...
static bool	uhi_cdc_set_ctrl_line (uint8_t port, le16_t wValue)
	Sends a control line command on the port. More...
static bool	uhi_cdc_rx_update (uhi_cdc_line_t *line)
	Update the transfer endpoint IN (RX) Valid the reception of the previous transfer. More...
static void	uhi_cdc_rx_received (usb_add_t add, usb_ep_t ep, uhd_trans_status_t status, iram_size_t nb_transferred)
	Manage the end of RX transfer. More...
static bool	uhi_cdc_tx_update (uhi_cdc_line_t *line)
	Update the transfer endpoint OUT (TX) Start a new transfer on endpoint OUT, if a data must be send and a new USB frame is occurred since last transfer. More...
static void	uhi_cdc_tx_send (usb_add_t add, usb_ep_t ep, uhd_trans_status_t status, iram_size_t nb_transferred)
	Manage the end of TX transfer. More...

static void uhi_cdc_free_device ( void  )

static

Free all CDC device structures.

References uhi_cdc_line_t::buffer, uhi_cdc_port_t::line_rx, uhi_cdc_port_t::line_tx, uhi_cdc_dev_t::nb_port, uhi_cdc_dev_t::port, and uhi_cdc_buf_t::ptr.

Referenced by uhi_cdc_install(), and uhi_cdc_uninstall().

static uhi_cdc_port_t * uhi_cdc_get_port ( uint8_t  port_num )

static

Returns a port structure information.

Parameters

port_num

Number of port

Returns

pointer on port structure

References uhi_cdc_dev_t::dev, uhi_cdc_dev_t::nb_port, and uhi_cdc_dev_t::port.

Referenced by uhi_cdc_get_nb_received(), uhi_cdc_getc(), uhi_cdc_is_tx_ready(), uhi_cdc_putc(), uhi_cdc_read_buf(), uhi_cdc_rx_received(), uhi_cdc_set_conf(), uhi_cdc_set_ctrl_line(), uhi_cdc_sof(), uhi_cdc_tx_send(), and uhi_cdc_write_buf().

static void uhi_cdc_rx_received ( usb_add_t  add, usb_ep_t  ep, uhd_trans_status_t  status, iram_size_t  nb_transferred  )

static

Manage the end of RX transfer.

Registered by uhd_ep_run() Callback called by USB interrupt after data transfer or abort (reset,...).

Parameters

add	USB address used by the transfer
status	Transfer status
nb_transferred	Number of data transfered

References uhi_cdc_line_t::b_trans_ongoing, uhi_cdc_line_t::buf_sel, uhi_cdc_line_t::buffer, uhi_cdc_line_t::buffer_size, uhi_cdc_dev_t::dev, uhi_cdc_line_t::ep_data, uhi_cdc_port_t::line_rx, uhi_cdc_buf_t::nb, uhi_cdc_buf_t::pos, uhi_cdc_line_t::sof, uhc_device_t::speed, uhd_get_frame_number(), uhd_get_microframe_number(), UHD_SPEED_HIGH, UHD_TRANS_NOERROR, UHD_TRANS_TIMEOUT, uhi_cdc_get_port(), uhi_cdc_rx_update(), and UNUSED.

Referenced by uhi_cdc_rx_update().

static bool uhi_cdc_rx_update ( uhi_cdc_line_t *  line )

static

Update the transfer endpoint IN (RX) Valid the reception of the previous transfer.

Start a new transfer on endpoint IN, if a RX buffer is free and a new USB frame is occurred since last transfer.

Parameters

line	RX communication line to manage

Returns

True, if a new transfer has been started

References uhc_device_t::address, uhi_cdc_line_t::b_trans_ongoing, uhi_cdc_line_t::buf_sel, uhi_cdc_line_t::buffer, uhi_cdc_line_t::buffer_size, cpu_irq_restore(), cpu_irq_save(), uhi_cdc_dev_t::dev, uhi_cdc_line_t::ep_data, uhi_cdc_buf_t::nb, uhi_cdc_buf_t::pos, uhi_cdc_buf_t::ptr, uhi_cdc_line_t::sof, uhc_device_t::speed, uhd_ep_run(), uhd_get_frame_number(), uhd_get_microframe_number(), UHD_SPEED_HIGH, UHI_CDC_RX_NOTIFY, and uhi_cdc_rx_received().

Referenced by uhi_cdc_getc(), uhi_cdc_read_buf(), uhi_cdc_rx_received(), and uhi_cdc_sof().

static bool uhi_cdc_set_conf ( uint8_t  port, usb_cdc_line_coding_t *  configuration  )

static

Changes the port configuration.

Parameters

port_num	Number of port
configuration	Pointer on new configuration

Returns

True, if success

References uhc_device_t::address, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhi_cdc_port_t::conf, uhi_cdc_dev_t::dev, uhi_cdc_port_t::iface_comm, uhd_setup_request(), uhi_cdc_get_port(), USB_REQ_CDC_SET_LINE_CODING, USB_REQ_DIR_OUT, USB_REQ_RECIP_INTERFACE, USB_REQ_TYPE_CLASS, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhi_cdc_open().

static bool uhi_cdc_set_ctrl_line ( uint8_t  port, le16_t  wValue  )

static

Sends a control line command on the port.

Parameters

port_num	Number of port
wValue	USB CDC control line word

Returns

True, if success

References uhc_device_t::address, usb_setup_req_t::bmRequestType, usb_setup_req_t::bRequest, uhi_cdc_dev_t::dev, uhi_cdc_port_t::iface_comm, uhd_setup_request(), uhi_cdc_get_port(), USB_REQ_CDC_SET_CONTROL_LINE_STATE, USB_REQ_DIR_OUT, USB_REQ_RECIP_INTERFACE, USB_REQ_TYPE_CLASS, usb_setup_req_t::wIndex, usb_setup_req_t::wLength, and usb_setup_req_t::wValue.

Referenced by uhi_cdc_close(), and uhi_cdc_open().

static void uhi_cdc_tx_send ( usb_add_t  add, usb_ep_t  ep, uhd_trans_status_t  status, iram_size_t  nb_transferred  )

static

Manage the end of TX transfer.

Registered by uhd_ep_run() Callback called by USB interrupt after data transfer or abort (reset,...).

Parameters

add	USB address used by the transfer
status	Transfer status
nb_transferred	Number of data transfered

References uhi_cdc_line_t::b_trans_ongoing, uhi_cdc_line_t::buf_sel, uhi_cdc_line_t::buffer, uhi_cdc_line_t::buffer_size, cpu_irq_restore(), cpu_irq_save(), uhi_cdc_dev_t::dev, uhi_cdc_line_t::ep_data, uhi_cdc_port_t::line_tx, uhi_cdc_buf_t::nb, uhi_cdc_line_t::sof, uhc_device_t::speed, uhd_get_frame_number(), uhd_get_microframe_number(), UHD_SPEED_HIGH, UHD_TRANS_NOERROR, uhi_cdc_get_port(), uhi_cdc_tx_update(), and UNUSED.

Referenced by uhi_cdc_tx_update().

static bool uhi_cdc_tx_update ( uhi_cdc_line_t *  line )

static

Update the transfer endpoint OUT (TX) Start a new transfer on endpoint OUT, if a data must be send and a new USB frame is occurred since last transfer.

Parameters

line	TX communication line to manage

Returns

True, if a new transfer has been started

References uhc_device_t::address, uhi_cdc_line_t::b_trans_ongoing, uhi_cdc_line_t::buf_sel, uhi_cdc_line_t::buffer, cpu_irq_restore(), cpu_irq_save(), uhi_cdc_dev_t::dev, uhi_cdc_line_t::ep_data, uhi_cdc_buf_t::nb, uhi_cdc_buf_t::ptr, uhi_cdc_line_t::sof, uhc_device_t::speed, uhd_ep_run(), uhd_get_frame_number(), uhd_get_microframe_number(), UHD_SPEED_HIGH, and uhi_cdc_tx_send().

Referenced by uhi_cdc_sof(), and uhi_cdc_tx_send().

uhi_cdc_dev_t uhi_cdc_dev

static

Initial value:

= {
    .dev = NULL,
    .nb_port = 0,
}

Information about the enumerated USB CDC device.