USB host library, support isochronous,bulk,interrupt and control.
Dependents: BaseUsbHost_example BaseJpegDecode_example SimpleJpegDecode_example
Import programBaseUsbHost_example
BaseUsbHost example program
Diff: BaseUsbHostIsoEp.cpp
- Revision:
- 2:fe1e62051d88
- Parent:
- 1:3b7bc4f87a61
- Child:
- 3:ae77d63a1eda
diff -r 3b7bc4f87a61 -r fe1e62051d88 BaseUsbHostIsoEp.cpp --- a/BaseUsbHostIsoEp.cpp Wed Dec 05 13:23:06 2012 +0000 +++ b/BaseUsbHostIsoEp.cpp Tue Dec 11 15:26:54 2012 +0000 @@ -1,4 +1,4 @@ -// BaseUsbHostIsoEp.cpp 2012/12/5 +// BaseUsbHostIsoEp.cpp 2012/12/11 #include "mbed.h" #include "rtos.h" #include "BaseUsbHost.h" @@ -16,16 +16,22 @@ TEST_ASSERT(size >= 128 && size <= 1023); m_PacketSize = size; - m_FrameCount = 8; + m_FrameCount = 4; // 1-8 + TEST_ASSERT(m_FrameCount >= 1 && m_FrameCount <= 8); m_itd_queue_count = 0; reset(); HCITD* itd = new_HCITD(); - TEST_ASSERT(itd); m_pED->TailTd = reinterpret_cast<HCTD*>(itd); m_pED->HeadTd = reinterpret_cast<HCTD*>(itd); - + TEST_ASSERT(itd); + if (itd == NULL) { + return; + } HCCA* hcca = reinterpret_cast<HCCA*>(LPC_USB->HcHCCA); TEST_ASSERT(hcca); + if (hcca == NULL) { + return; + } for(int i = 0; i < 32; i++) { if (hcca->InterruptTable[i] == 0) { hcca->InterruptTable[i] = reinterpret_cast<uint32_t>(m_pED); @@ -84,15 +90,20 @@ } -HCITD* IsochronousEp::isochronousReveive() +HCITD* IsochronousEp::isochronousReveive(int millisec) { TEST_ASSERT(m_itd_queue_count >= 0); - while(m_itd_queue_count < HCTD_QUEUE_SIZE) { + while(m_itd_queue_count < 3 && m_itd_queue_count < HCTD_QUEUE_SIZE) { HCITD* itd = reinterpret_cast<HCITD*>(m_pED->TailTd); TEST_ASSERT(itd); - //DBG_ITD(itd); + if (itd == NULL) { + return NULL; + } HCITD* blank_itd = new_HCITD(); TEST_ASSERT(blank_itd); + if (blank_itd == NULL) { + return NULL; + } itd->Next = reinterpret_cast<uint32_t>(blank_itd); m_pED->TailTd = reinterpret_cast<HCTD*>(blank_itd); m_itd_queue_count++; @@ -100,21 +111,23 @@ LPC_USB->HcControl |= OR_CONTROL_PLE; // Enable Periodic } - HCITD* itd = get_queue_HCITD(1); + HCITD* itd = get_queue_HCITD(millisec); if (itd) { m_itd_queue_count--; } return itd; } -HCITD* IsochronousEp::get_queue_HCITD(uint32_t millisec) +HCITD* IsochronousEp::get_queue_HCITD(int millisec) { for(int i = 0; i < 16; i++) { osEvent evt = m_queue.get(millisec); if (evt.status == osEventMessage) { HCITD* itd = reinterpret_cast<HCITD*>(evt.value.p); TEST_ASSERT(itd); - //led3 = !led3; + if (itd == NULL) { + return NULL; + } uint8_t cc = itd->Control>>28; if (cc != 0) { m_ConditionCode = cc; @@ -127,8 +140,8 @@ } else { DBG("evt.status: %02x\n", evt.status); TEST_ASSERT(evt.status == osEventMessage); + return NULL; } } return NULL; } -