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[usb] Better comments in usb.cpp

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Change-Id: I81074c755e2e192a1c82bfabf26ca601a6162bd8
This commit is contained in:
Léa Saviot
2018-04-05 09:52:10 +02:00
parent 61e880935a
commit b2f9c4c0c9
1 changed files with 3 additions and 3 deletions
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6
ion/src/device/usb.cpp
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@@ -90,7 +90,7 @@ void initOTG() {
while (!OTG.GRSTCTL()->getAHBIDL()) {
}
/* Core soft reset: Clears the interrupts and many the CSR register bits,
/* Core soft reset: Clears the interrupts and many of the CSR register bits,
* resets state machines, flushes the FIFOs and terminates USB transactions.*/
OTG.GRSTCTL()->setCSRST(true);
while (OTG.GRSTCTL()->getCSRST()) {
@@ -106,8 +106,8 @@ void initOTG() {
// Force peripheral only mode
OTG.GUSBCFG()->setFDMOD(true);
// Configure the USB turnaround time, depending on the AHB clock speed.
OTG.GUSBCFG()->setTRDT(0x6); // TODO
// Configure the USB turnaround time, depending on the AHB clock speed (96MHz)
OTG.GUSBCFG()->setTRDT(0x6);
// Clear the interrupts
OTG.GINTSTS()->set(0);