/**
Gets the status from a specific endpoint.
@param [in] bEP Endpoint number
@return Endpoint status byte (containing EP_STATUS_xxx bits)
*/
unsigned char USBHwEPGetStatus(unsigned char bEP)
{
int idx = EP2IDX(bEP);
return USBHwCmdRead(CMD_EP_SELECT | idx);
}
/**
USB interrupt handler
@todo Get all 11 bits of frame number instead of just 8
Endpoint interrupts are mapped to the slow interrupt
*/
void USBHwISR(void)
{
unsigned long dwStatus;
unsigned long dwIntBit;
unsigned char bEPStat, bDevStat, bStat;
int i;
unsigned short wFrame;
// handle device interrupts
dwStatus = LPC_USB->USBDevIntSt;
// frame interrupt
if (dwStatus & FRAME) {
// clear int
LPC_USB->USBDevIntClr = FRAME;
// call handler
if (_pfnFrameHandler != NULL) {
wFrame = USBHwCmdRead(CMD_DEV_READ_CUR_FRAME_NR);
_pfnFrameHandler(wFrame);
}
}
// device status interrupt
if (dwStatus & DEV_STAT) {
/* Clear DEV_STAT interrupt before reading DEV_STAT register.
This prevents corrupted device status reads, see
LPC2148 User manual revision 2, 25 july 2006.
*/
LPC_USB->USBDevIntClr = DEV_STAT;
bDevStat = USBHwCmdRead(CMD_DEV_STATUS);
if (bDevStat & (CON_CH | SUS_CH | RST)) {
// convert device status into something HW independent
bStat = ((bDevStat & CON) ? DEV_STATUS_CONNECT : 0) |
((bDevStat & SUS) ? DEV_STATUS_SUSPEND : 0) |
((bDevStat & RST) ? DEV_STATUS_RESET : 0);
// call handler
if (_pfnDevIntHandler != NULL) {
_pfnDevIntHandler(bStat);
}
}
}
// endpoint interrupt
if (dwStatus & EP_SLOW) {
// clear EP_SLOW
LPC_USB->USBDevIntClr = EP_SLOW;
// check all endpoints
for (i = 0; i < 32; i++) {
dwIntBit = (1 << i);
if (LPC_USB->USBEpIntSt & dwIntBit) {
// clear int (and retrieve status)
LPC_USB->USBEpIntClr = dwIntBit;
Wait4DevInt(CDFULL);
bEPStat = LPC_USB->USBCmdData;
// convert EP pipe stat into something HW independent
bStat = ((bEPStat & EPSTAT_FE) ? EP_STATUS_DATA : 0) |
((bEPStat & EPSTAT_ST) ? EP_STATUS_STALLED : 0) |
((bEPStat & EPSTAT_STP) ? EP_STATUS_SETUP : 0) |
((bEPStat & EPSTAT_EPN) ? EP_STATUS_NACKED : 0) |
((bEPStat & EPSTAT_PO) ? EP_STATUS_ERROR : 0);
// call handler
if (_apfnEPIntHandlers[i / 2] != NULL) {
_apfnEPIntHandlers[i / 2](IDX2EP(i), bStat);
}
}
}
}
}
/**
Gets the status from a specific endpoint.
@param [in] bEP Endpoint number
@return Endpoint status byte (containing EP_STATUS_xxx bits)
*/
U8 USBHwEPGetStatus(U8 bEP)
{
int idx = EP2IDX(bEP);
return USBHwCmdRead(CMD_EP_SELECT | idx);
}
