SIO2HOST - USB

This module performs serial input/output functionalities via USB.

Functions
void	dtr_cb (bool)
	This function is callled with the value set as true whenever a device is connected to the terminal. More...
uint8_t	sio2host_getchar (void)
	This function performs a blocking character receive functionality. More...
int	sio2host_getchar_nowait (void)
	This function performs a non-blocking character receive functionality. More...
void	sio2host_init (void)
	Initializes the Serial IO Module of the Host Device. More...
void	sio2host_putchar (uint8_t)
uint8_t	sio2host_rx (uint8_t *data, uint8_t max_length)
	Receives data from USB. More...
uint8_t	sio2host_tx (uint8_t *data, uint8_t length)
	Transmits data via USB. More...
void	usb_rx_notify (void)
	This function is called by the USB data receive Interrupt The Receive buffer is filled in this function. More...

void dtr_cb

(

bool

)

This function is callled with the value set as true whenever a device is connected to the terminal.

References stdio_usb_disable(), and stdio_usb_enable().

uint8_t sio2host_getchar

(

void

)

This function performs a blocking character receive functionality.

Returns

returns the data which is received

References sio2host_rx().

int sio2host_getchar_nowait

(

void

)

This function performs a non-blocking character receive functionality.

Returns

'-1' if no data is recieved or returns the data if a character is received

References sio2host_rx().

Referenced by range_test_tx_off_task(), and range_test_tx_on_task().

void sio2host_init

(

void

)

Initializes the Serial IO Module of the Host Device.

Returns

STATUS_OK for successful initialization and FAILURE incase the IO is not initialized

References stdio_usb_init().

Referenced by performance_analyzer_init().

void sio2host_putchar

(

uint8_t

)

References sio2host_tx().

uint8_t sio2host_rx	(	uint8_t *	data,
		uint8_t	max_length
	)

Receives data from USB.

Parameters

data	pointer to the buffer where the received data is to be stored
max_length	maximum length of data to be received

Returns

actual number of bytes received

References serial_rx_buf, serial_rx_buf_head, SERIAL_RX_BUF_SIZE_HOST, serial_rx_buf_tail, and serial_rx_count.

Referenced by serial_data_handler(), sio2host_getchar(), and sio2host_getchar_nowait().

uint8_t sio2host_tx	(	uint8_t *	data,
		uint8_t	length
	)

Transmits data via USB.

Parameters

data	Pointer to the buffer where the data to be transmitted is present
length	Number of bytes to be transmitted

Returns

Number of bytes actually transmitted

References udi_cdc_putc().

Referenced by serial_data_handler(), and sio2host_putchar().

void usb_rx_notify

(

void

)

This function is called by the USB data receive Interrupt The Receive buffer is filled in this function.

References cpu_irq_disable, cpu_irq_enable, main_b_cdc_enable, serial_rx_buf, SERIAL_RX_BUF_SIZE_HOST, serial_rx_buf_tail, serial_rx_count, udi_cdc_getc(), and udi_cdc_is_rx_ready().