Maxim-integrated 73S12xxF Software Manual de usuario descargar pdf (Pagina 49)

UG_12xxF_016 73S12xxF Software User Guide

Rev. 1.50 49

USB_Stall()

Purpose Stalls portions of the USB interface: The Endpoints to be stalled are configurable.

Synopsis Void USB_Stall ( IN char cUSBEndpointStall );

Parameters cUSBEndpointStall: Input parameter

Specifies which endpoints are to be stalled by this function. The other endpoints

remain in their previous state. This parameter can be the result of an OR operation

between the following values if several endpoints are to be disabled:

ENDPOINT_0 0x01

ENDPOINT_1_IN 0x02

ENDPOINT_2_IN 0x04

ENDPOINT_1_OUT 0x08

Return Codes None.

Deactivated endpoints will have a STALLED status. If all endpoints are stalled, it will disconnect

the USB interface from the Host.

USB_UnStall()

Purpose Unstalls portions of the USB interface: The Endpoints to be unstalled are configurable.

Synopsis Void USB_UnStall ( IN char cUSBEndpointUnStall );

Parameters cUSBEndpointUnStall: Input parameter

Specifies which endpoints are to be unstalled by this function. The other endpoints

remain in their previous state. This parameter can be the result of an OR operation

between the following values if several endpoints are to be disabled:

ENDPOINT_0 0x01

ENDPOINT_1_IN 0x02

ENDPOINT_2_IN 0x04

ENDPOINT_1_OUT 0x08

Return Codes None.

All unstalled endpoints will have status = IDLE.

USB_IN_1()

Purpose Send data to the Host through Endpoint 1 (BULK IN). When the buffer size is bigger

than the Maximum Packet Size (specified by the Descriptor string initialized in the

USB_Init() function), then the API will split the buffer into smaller blocks and transmit

it in pieces.

Synopsis Void USB_IN_1 ( IN struct USB_t *pUSB );

struct

{

unsigned char *USBData,

unsigned int USBLen

USB_RC USBStatus

} USB_t;

Parameters USBData: Input parameter

Specifies the pointer to the data to be transmitted to the Host.

USBLen: Input/Output parameter

On input, specifies the number of bytes to send to the Host. On output, specifies the

current number of bytes sent to the Host.

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