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refractor usbd's get descriptor

This commit is contained in:
hathach 2013-11-15 15:05:23 +07:00
parent 699edf9485
commit d4a260c090
1 changed files with 19 additions and 19 deletions
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38
tinyusb/device/usbd.c
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@ -96,7 +96,7 @@ static usbd_class_driver_t const usbd_class_drivers[TUSB_CLASS_MAPPED_INDEX_STAR
// INTERNAL OBJECT & FUNCTION DECLARATION
//--------------------------------------------------------------------+
tusb_error_t usbd_set_configure_received(uint8_t coreid, uint8_t config_number);
tusb_error_t get_descriptor_subtask(uint8_t coreid, tusb_control_request_t * p_request);
tusb_error_t get_descriptor_subtask(uint8_t coreid, tusb_control_request_t * p_request, uint8_t const ** pp_buffer, uint16_t * p_length);
//--------------------------------------------------------------------+
// APPLICATION INTERFACE
@ -151,7 +151,12 @@ tusb_error_t usbd_body_subtask(void)
{
if ( TUSB_REQUEST_GET_DESCRIPTOR == p_request->bRequest )
{
error = get_descriptor_subtask(event.coreid, p_request);
static uint8_t const * p_buffer = NULL;
static uint16_t length = 0;
error = get_descriptor_subtask(event.coreid, p_request, &p_buffer, &length);
dcd_pipe_control_xfer(event.coreid, p_request->bmRequestType_bit.direction, p_buffer, length); // zero length
}
else if ( TUSB_REQUEST_SET_ADDRESS == p_request->bRequest )
{
@ -293,40 +298,35 @@ tusb_error_t usbd_set_configure_received(uint8_t coreid, uint8_t config_number)
return TUSB_ERROR_NONE;
}
tusb_error_t get_descriptor_subtask(uint8_t coreid, tusb_control_request_t * p_request)
tusb_error_t get_descriptor_subtask(uint8_t coreid, tusb_control_request_t * p_request, uint8_t const ** pp_buffer, uint16_t * p_length)
{
OSAL_SUBTASK_BEGIN
static uint8_t const * p_data;
static uint16_t length;
tusb_std_descriptor_type_t const desc_type = p_request->wValue >> 8;
tusb_std_descriptor_type_t const desc_type = u16_high_u8(p_request->wValue);
uint8_t const desc_index = u16_low_u8( p_request->wValue );
if ( TUSB_DESC_TYPE_DEVICE == desc_type )
{
p_data = (uint8_t const *) &app_tusb_desc_device;
length = min16_of( p_request->wLength, sizeof(tusb_descriptor_device_t)) ;
(*pp_buffer) = (uint8_t const *) &app_tusb_desc_device;
(*p_length) = sizeof(tusb_descriptor_device_t);
}
else if ( TUSB_DESC_TYPE_CONFIGURATION == desc_type )
{
p_data = (uint8_t const *) &app_tusb_desc_configuration;
length = min16_of( p_request->wLength, sizeof(app_tusb_desc_configuration)) ;
(*pp_buffer) = (uint8_t const *) &app_tusb_desc_configuration;
(*p_length) = sizeof(app_tusb_desc_configuration);
}
else if ( TUSB_DESC_TYPE_STRING == desc_type )
{
if ( ! (desc_index < TUSB_CFG_DEVICE_STRING_DESCRIPTOR_COUNT) ) SUBTASK_EXIT (TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT);
if ( ! (desc_index < TUSB_CFG_DEVICE_STRING_DESCRIPTOR_COUNT) ) return TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT;
p_data = (uint8_t const *) desc_str_table[desc_index];
length = min16_of( p_request->wLength, desc_str_table[desc_index]->bLength) ;
(*pp_buffer) = (uint8_t const*) desc_str_table[desc_index];
(*p_length) = desc_str_table[desc_index]->bLength;
}else
{
SUBTASK_EXIT (TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT);
return TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT;
}
dcd_pipe_control_xfer(coreid, p_request->bmRequestType_bit.direction, p_data, length);
(*p_length) = min16_of(p_request->wLength, (*p_length) ); // cannot return more than hosts requires
OSAL_SUBTASK_END
return TUSB_ERROR_NONE;
}
//--------------------------------------------------------------------+
// USBD-CLASS API