// ----------------------------------------------------------------------
// Inspect an incoming packet.
// ----------------------------------------------------------------------
static void usb_receive ( byte_t* data, byte_t rx_len )
{
byte_t len;
byte_t type;
byte_t limit;
usb_tx_state = TX_STATE_RAM;
len = 0;
if ( usb_rx_token == USB_PID_SETUP )
{
limit = data[6];
if ( data[7] )
{
limit = 255;
}
type = data[0] & 0x60;
if ( type == 0x00 )
{ // Standard request
if ( data[1] == 0 ) // GET_STATUS
{
len = 2;
#if USBTINY_MAX_POWER == 0
data[0] = (data[0] == 0x80);
#else
data[0] = 0;
#endif
data[1] = 0;
}
else if ( data[1] == 5 ) // SET_ADDRESS
{
new_address = data[2];
}
else if ( data[1] == 6 ) // GET_DESCRIPTOR
{
usb_tx_state = TX_STATE_ROM;
if ( data[3] == 1 )
{ // DEVICE
data = (byte_t*) &descr_device;
len = sizeof(descr_device);
}
else if ( data[3] == 2 )
{ // CONFIGURATION
data = (byte_t*) &descr_config;
len = sizeof(descr_config);
// If we got this far, there's a good chance everything is OK with enumeration so turn on the OK led
PORTD = _BV(5);
}
#if VENDOR_NAME_ID || DEVICE_NAME_ID || SERIAL_ID
else if ( data[3] == 3 )
{ // STRING
if ( data[2] == 0 )
{
data = (byte_t*) &string_langid;
len = sizeof(string_langid);
}
#if VENDOR_NAME_ID
else if ( data[2] == VENDOR_NAME_ID )
{
data = (byte_t*) &string_vendor;
len = sizeof(string_vendor);
}
#endif
#if DEVICE_NAME_ID
else if ( data[2] == DEVICE_NAME_ID )
{
data = (byte_t*) &string_device;
len = sizeof(string_device);
}
#endif
#if SERIAL_ID
else if ( data[2] == SERIAL_ID )
{
data = (byte_t*) &string_serial;
len = sizeof(string_serial);
}
#endif
}
#endif
}
else if ( data[1] == 8 ) // GET_CONFIGURATION
{
data[0] = 1; // return bConfigurationValue
len = 1;
}
else if ( data[1] == 10 ) // GET_INTERFACE
{
data[0] = 0;
len = 1;
}
}
else
{ // Class or Vendor request
len = usb_setup( data );
#if USBTINY_CALLBACK_IN
if ( len == 0xff )
{
usb_tx_state = TX_STATE_CALLBACK;
}
#endif
}
if ( len > limit )
{
len = limit;
}
usb_tx_data = data;
}
#if USBTINY_CALLBACK_OUT
else if ( rx_len > 0 )
{ // usb_rx_token == USB_PID_OUT
usb_out( data, rx_len );
}
#endif
usb_tx_total = len;
usb_tx_buf[0] = USB_PID_DATA0; // next data packet will be DATA1
}
// ----------------------------------------------------------------------
// Inspect an incoming packet.
// ----------------------------------------------------------------------
static void usb_receive ( byte_t* data, byte_t rx_len )
{
byte_t len;
byte_t type;
txlen_t limit;
usb_tx_state = TX_STATE_RAM;
len = 0;
limit = 0;
if ( usb_rx_token == USB_PID_SETUP )
{
#if USBTINY_CALLBACK_IN == 2
limit = * (uint_t*) & data[6];
#else
limit = data[6];
if ( data[7] )
{
limit = 255;
}
#endif
type = data[0] & 0x60;
if ( type == 0x00 )
{ // Standard request
if ( data[1] == 0 ) // GET_STATUS
{
len = 2;
#if USBTINY_MAX_POWER == 0
data[0] = (data[0] == 0x80);
#else
data[0] = 0;
#endif
data[1] = 0;
}
else if ( data[1] == 5 ) // SET_ADDRESS
{
usb_new_address = data[2];
#ifdef USBTINY_USB_OK_LED
SET(USBTINY_USB_OK_LED);// LED on
#endif
}
else if ( data[1] == 6 ) // GET_DESCRIPTOR
{
usb_tx_state = TX_STATE_ROM;
if ( data[3] == 1 )
{ // DEVICE
data = (byte_t*) &descr_device;
len = sizeof(descr_device);
}
else if ( data[3] == 2 )
{ // CONFIGURATION
data = (byte_t*) &descr_config;
len = sizeof(descr_config);
}
#if VENDOR_NAME_ID || DEVICE_NAME_ID || SERIAL_ID
else if ( data[3] == 3 )
{ // STRING
if ( data[2] == 0 )
{
data = (byte_t*) &string_langid;
len = sizeof(string_langid);
}
#if VENDOR_NAME_ID
else if ( data[2] == VENDOR_NAME_ID )
{
data = (byte_t*) &string_vendor;
len = sizeof(string_vendor);
}
#endif
#if DEVICE_NAME_ID
else if ( data[2] == DEVICE_NAME_ID )
{
data = (byte_t*) &string_device;
len = sizeof(string_device);
}
#endif
#if SERIAL_ID
else if ( data[2] == SERIAL_ID )
{
data = (byte_t*) &string_serial;
len = sizeof(string_serial);
}
#endif
}
#endif
}
else if ( data[1] == 8 ) // GET_CONFIGURATION
{
data[0] = 1; // return bConfigurationValue
len = 1;
}
else if ( data[1] == 10 ) // GET_INTERFACE
{
data[0] = 0;
len = 1;
}
}
else
{ // Class or Vendor request
len = usb_setup( data );
#if USBTINY_CALLBACK_IN
if ( len == 0xff )
{
usb_tx_state = TX_STATE_CALLBACK;
}
#endif
}
if ( len < limit
#if USBTINY_CALLBACK_IN == 2
&& len != 0xff
#endif
)
{
limit = len;
}
usb_tx_data = data;
}
#if USBTINY_CALLBACK_OUT
else if ( rx_len > 0 )
{ // usb_rx_token == USB_PID_OUT
usb_out( data, rx_len );
}
#endif
usb_tx_total = limit;
usb_tx_buf[0] = USB_PID_DATA0; // next data packet will be DATA1
}