USB host library, support isochronous,bulk,interrupt and control.
Dependents: BaseUsbHost_example BaseJpegDecode_example SimpleJpegDecode_example
Import programBaseUsbHost_example
BaseUsbHost example program
Diff: BaseUsbHostIntEp.cpp
- Revision:
- 2:fe1e62051d88
- Parent:
- 1:3b7bc4f87a61
- Child:
- 3:ae77d63a1eda
--- a/BaseUsbHostIntEp.cpp Wed Dec 05 13:23:06 2012 +0000 +++ b/BaseUsbHostIntEp.cpp Tue Dec 11 15:26:54 2012 +0000 @@ -1,4 +1,4 @@ -// BaseUsbHostIntEp.cpp 2012/12/5 +// BaseUsbHostIntEp.cpp 2012/12/11 #include "mbed.h" #include "rtos.h" #include "BaseUsbHost.h" @@ -11,12 +11,17 @@ :BaseEp(addr, ep, size, lowSpeed) { HCTD* td = new_HCTD(); - TEST_ASSERT(td); m_pED->TailTd = td; m_pED->HeadTd = td; - + TEST_ASSERT(td); + if (td == NULL) { + return; + } HCCA* pHcca = reinterpret_cast<HCCA*>(LPC_USB->HcHCCA); TEST_ASSERT(pHcca); + if (pHcca == NULL) { + return; + } int n = 0; m_pED->Next = pHcca->InterruptTable[n]; pHcca->InterruptTable[n] = reinterpret_cast<uint32_t>(m_pED); @@ -28,11 +33,17 @@ if (m_td_queue_count == 0) { HCTD* data_td = m_pED->TailTd; TEST_ASSERT(data_td); + if (data_td == NULL) { + return USB_ERROR; + } data_td->Control |= TD_IN; data_td->CurrBufPtr = buf; data_td->BufEnd = const_cast<uint8_t*>(buf)+len-1; HCTD* blank_td = new_HCTD(); TEST_ASSERT(blank_td); + if (blank_td == NULL) { + return USB_ERROR_MEMORY; + } data_td->Next = reinterpret_cast<uint32_t>(blank_td); m_pED->TailTd = blank_td; m_td_queue_count++; @@ -41,15 +52,15 @@ } HCTD* td = get_queue_HCTD(millisec); - if (td) { - DBG_TD(td); - int ret = len; - if (td->CurrBufPtr) { - ret = td->CurrBufPtr - buf; - } - delete_HCTD(td); - m_td_queue_count--; - return ret; + if (td == NULL) { + return USB_PROCESSING; } - return USB_TIMEOUT; + DBG_TD(td); + int ret = len; + if (td->CurrBufPtr) { + ret = td->CurrBufPtr - buf; + } + delete_HCTD(td); + m_td_queue_count--; + return ret; }