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Add data (non-control) transfer function

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This commit is contained in:
PaulStoffregen 2017-02-12 18:44:24 -08:00
parent 1b300c9051
commit 84752f8310
1 changed files with 48 additions and 4 deletions
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52
ehci.cpp
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@ -462,12 +462,56 @@ bool USBHost::queue_Control_Transfer(Device_t *dev, setup_t *setup, void *buf, U
//
bool USBHost::queue_Data_Transfer(Pipe_t *pipe, void *buffer, uint32_t len, USBDriver *driver)
{
Transfer_t *transfer, *data, *next;
uint8_t *p = (uint8_t *)buffer;
uint32_t count;
bool last = false;
Serial.println("new_Data_Transfer");
//Transfer_t *transfer = allocate_Transfer();
//if (!transfer) return false;
return false;
//return queue_Transfer(pipe, transfer);
// allocate qTDs
transfer = allocate_Transfer();
if (!transfer) return false;
data = transfer;
for (count=(len >> 14); count; count--) {
next = allocate_Transfer();
if (!next) {
// free already-allocated qTDs
while (1) {
next = (Transfer_t *)transfer->qtd.next;
free_Transfer(transfer);
if (transfer == data) break;
transfer = next;
}
return false;
}
data->qtd.next = (uint32_t)next;
data = next;
}
// last qTD needs info for followup
data->qtd.next = 1;
data->pipe = pipe;
data->buffer = buffer;
data->length = len;
data->setup = NULL;
data->driver = driver;
// initialize all qTDs
data = transfer;
while (1) {
uint32_t count = len;
if (count > 16384) {
count = 16384;
} else {
last = true;
}
init_qTD(data, p, count, pipe->direction, 0, last);
if (last) break;
p += count;
len -= count;
data = (Transfer_t *)(data->qtd.next);
}
return queue_Transfer(pipe, transfer);
}
bool USBHost::queue_Transfer(Pipe_t *pipe, Transfer_t *transfer)
{