Diff: LPC4088-USBHost/USBHost/BaseUsbHostIsoEp.cpp

Revision:

0:11152e69fc05

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LPC4088-USBHost/USBHost/BaseUsbHostIsoEp.cpp	Tue Apr 22 10:54:52 2014 +0000
@@ -0,0 +1,131 @@
+// BaseUsbHostIsoEp.cpp 2014/4/21
+#include "USBHost.h"
+//#define DEBUG
+#include "BaseUsbHostDebug.h"
+//#define TEST
+#include "BaseUsbHostTest.h"
+
+HCITD::HCITD(USBEndpoint* obj, uint16_t FrameNumber, int FrameCount, uint16_t PacketSize) {
+    Control = 0xe0000000           | // CC ConditionCode NOT ACCESSED
+             ((FrameCount-1) << 24)| // FC FrameCount
+                  TD_DELAY_INT(0)  | // DI DelayInterrupt
+                 FrameNumber;        // SF StartingFrame
+    BufferPage0 = const_cast<uint8_t*>(buf);
+    BufferEnd = const_cast<uint8_t*>(buf) + PacketSize * FrameCount - 1;
+    Next = NULL; 
+    ep = obj;
+    uint32_t addr = reinterpret_cast<uint32_t>(buf);
+    for(int i = 0; i < FrameCount; i++) {
+        uint16_t offset = addr & 0x0fff;
+        if ((addr&0xfffff000) == (reinterpret_cast<uint32_t>(BufferEnd)&0xfffff000)) {
+            offset |= 0x1000;
+        }
+        OffsetPSW[i] = 0xe000|offset;
+        addr += PacketSize;
+    }
+}
+
+IsochronousEp::IsochronousEp(int addr, uint8_t ep, uint16_t size):USBEndpoint(addr, ep, size)
+{
+    setType(ISOCHRONOUS_ENDPOINT);
+    DBG("%p FA:%d EP:%02X MPS:%d\n", this, addr, ep, size);
+    TEST_ASSERT(m_pED);
+    
+    m_pED->Control |= (1 << 15); // F Format ITD
+
+    TEST_ASSERT(size >= 128 && size <= 1023);
+    m_PacketSize = size;
+    m_FrameCount = 4; // 1-8
+    TEST_ASSERT(m_FrameCount >= 1 && m_FrameCount <= 8);
+    m_itd_queue_count = 0;
+    reset();
+    HCITD* itd = new_HCITD(this);
+    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] == NULL) {
+            hcca->InterruptTable[i] = m_pED;
+        } else {
+            HCED* nextEd = hcca->InterruptTable[i];
+            while(nextEd->Next && nextEd->Next != m_pED) {
+                nextEd = nextEd->Next;
+            }
+            nextEd->Next = m_pED;
+        }
+    }
+    DBG_ED(m_pED);
+}
+
+void IsochronousEp::reset(int delay_ms)
+{
+    m_FrameNumber = LPC_USB->HcFmNumber + delay_ms;
+}
+
+HCITD* IsochronousEp::new_HCITD(USBEndpoint* obj)
+{
+    HCITD* itd = new(m_PacketSize*m_FrameCount)HCITD(obj, m_FrameNumber, m_FrameCount, m_PacketSize);
+    if (itd == NULL) {
+        return NULL;
+    } 
+    m_FrameNumber += m_FrameCount;
+    return itd;
+}
+
+HCITD* IsochronousEp::isochronousReveive(int millisec)
+{
+    TEST_ASSERT(m_itd_queue_count >= 0);
+    while(m_itd_queue_count < 3 && m_itd_queue_count < HCTD_QUEUE_SIZE) {
+        HCITD* itd = reinterpret_cast<HCITD*>(m_pED->TailTd);
+        TEST_ASSERT(itd);
+        if (itd == NULL) {
+            return NULL;
+        }
+        HCITD* blank_itd = new_HCITD(this);
+        TEST_ASSERT(blank_itd);
+        if (blank_itd == NULL) {
+            return NULL;
+        }
+        itd->Next = blank_itd;
+        m_pED->TailTd = reinterpret_cast<HCTD*>(blank_itd);
+        m_itd_queue_count++;
+        //DBG_IED(m_pED);
+        USBHALHost::enable(ISOCHRONOUS_ENDPOINT); // Enable Periodic
+    }
+    
+    HCITD* itd = get_queue_HCITD(millisec);
+    if (itd) {
+        m_itd_queue_count--;
+    }
+    return itd;
+}
+
+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);
+            return itd;
+        } else if (evt.status == osOK) {
+            continue;
+        } else if (evt.status == osEventTimeout) {
+            return NULL;
+        } else {
+            DBG("evt.status: %02x\n", evt.status);
+            TEST_ASSERT(evt.status == osEventMessage);
+            return NULL;
+        }
+    }
+    return NULL;
+}
+