/**
Initialises the USB hardware and sets up the USB stack by
installing default callbacks.
@return TRUE if initialisation was successful
*/
BOOL USBInit(void)
{
// init hardware
USBHwInit();
// Manual reset to workaround silicon bug
USBHwReset();
// Reset USB address
USBHwSetAddress(0);
// register device status interrupt handler
USBHwRegisterDevIntHandler(HandleUsbDevStatus);
// register control transfer handler on EP0
USBHwRegisterEPIntHandler(0x00, USBHandleControlTransfer);
USBHwRegisterEPIntHandler(0x80, USBHandleControlTransfer);
// setup control endpoints
USBHwEPConfig(0x00, MAX_PACKET_SIZE0);
USBHwEPConfig(0x80, MAX_PACKET_SIZE0);
// register standard request handler
USBRegisterRequestHandler(REQTYPE_TYPE_STANDARD, USBHandleStandardRequest, abStdReqData);
return TRUE;
}
/**
Local function to handle a standard device request
@param [in] pSetup The setup packet
@param [in,out] *piLen Pointer to data length
@param [in,out] ppbData Data buffer.
@return true if the request was handled successfully
*/
static bool HandleStdDeviceReq(TSetupPacket *pSetup, int *piLen, uint8_t **ppbData)
{
uint8_t *pbData = *ppbData;
switch (pSetup->bRequest) {
case REQ_GET_STATUS:
// bit 0: self-powered
// bit 1: remote wakeup = not supported
pbData[0] = 0;
pbData[1] = 0;
*piLen = 2;
break;
case REQ_SET_ADDRESS:
USBHwSetAddress(pSetup->wValue);
break;
case REQ_GET_DESCRIPTOR:
DBG("D%x", pSetup->wValue);
return USBGetDescriptor(pSetup->wValue, pSetup->wIndex, piLen, ppbData);
case REQ_GET_CONFIGURATION:
// indicate if we are configured
pbData[0] = bConfiguration;
*piLen = 1;
break;
case REQ_SET_CONFIGURATION:
if (!USBSetConfiguration(pSetup->wValue & 0xFF, 0)) {
DBG("USBSetConfiguration failed!\n");
return false;
}
// configuration successful, update current configuration
bConfiguration = pSetup->wValue & 0xFF;
break;
case REQ_CLEAR_FEATURE:
case REQ_SET_FEATURE:
if (pSetup->wValue == FEA_REMOTE_WAKEUP) {
// put DEVICE_REMOTE_WAKEUP code here
}
if (pSetup->wValue == FEA_TEST_MODE) {
// put TEST_MODE code here
}
return false;
case REQ_SET_DESCRIPTOR:
DBG("Device req %d not implemented\n", pSetup->bRequest);
return false;
default:
DBG("Illegal device req %d\n", pSetup->bRequest);
return false;
}
return true;
}
/*************************************************************************
HandleStdDeviceReq
==================
Local function to handle a standard device request
IN pSetup The setup packet
IN/OUT *piLen Pointer to data length
ppbData Data buffer.
Returns TRUE if the request was handled successfully
**************************************************************************/
static BOOL HandleStdDeviceReq(TSetupPacket *pSetup, int *piLen, U8 **ppbData)
{
U8 *pbData = *ppbData;
switch (pSetup->bRequest) {
case REQ_GET_STATUS:
// bit 0: self-powered
// bit 1: remote wakeup
pbData[0] = 0; // TODO use bmAttributes according to configuration
pbData[1] = 0;
*piLen = 2;
break;
case REQ_SET_ADDRESS:
USBHwSetAddress(pSetup->wValue);
break;
case REQ_GET_DESCRIPTOR:
DBG("D%x", pSetup->wValue);
if (pfnGetDescriptor == NULL) {
return FALSE;
}
return pfnGetDescriptor(pSetup->wValue, pSetup->wIndex, piLen, ppbData);
case REQ_GET_CONFIGURATION:
// indicate if we are configured
pbData[0] = bConfiguration;
*piLen = 1;
break;
case REQ_SET_CONFIGURATION:
bConfiguration = pSetup->wValue & 0xFF; // TODO use bConfigurationValue(s)
USBHwConfigDevice((pSetup->wValue & 0xFF) != 0);
break;
case REQ_CLEAR_FEATURE:
case REQ_SET_FEATURE:
if (pSetup->wValue == FEA_REMOTE_WAKEUP) {
// put DEVICE_REMOTE_WAKEUP code here
}
if (pSetup->wValue == FEA_TEST_MODE) {
// put TEST_MODE code here
}
return FALSE;
case REQ_SET_DESCRIPTOR:
DBG("Device req %d not implemented\n", pSetup->bRequest);
return FALSE;
default:
DBG("Illegal device req %d\n", pSetup->bRequest);
return FALSE;
}
return TRUE;
}
