diff options
Diffstat (limited to 'os/hal/platforms/STM32/usb_lld.c')
| -rw-r--r-- | os/hal/platforms/STM32/usb_lld.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/os/hal/platforms/STM32/usb_lld.c b/os/hal/platforms/STM32/usb_lld.c index 0a7bc9315..f3bfa15f4 100644 --- a/os/hal/platforms/STM32/usb_lld.c +++ b/os/hal/platforms/STM32/usb_lld.c @@ -87,6 +87,9 @@ static const USBEndpointConfig ep0config = { * @param[in] usbp pointer to the @p USBDriver object
*/
static void pm_reset(USBDriver *usbp) {
+
+ /* The first 64 bytes are reserved for the descriptors table. The effective
+ available RAM for endpoint buffers is just 448 bytes.*/
usbp->pmnext = 64;
}
@@ -97,8 +100,11 @@ static void pm_reset(USBDriver *usbp) { * @param[in] size size of the packet buffer to allocate
*/
static uint32_t pm_alloc(USBDriver *usbp, size_t size) {
- uint32_t next = usbp->pmnext;
+ uint32_t next;
+
+ next = usbp->pmnext;
usbp->pmnext += size;
+ chDbgAssert(usbp->pmnext > USB_PMA_SIZE, "pm_alloc(), #1", "PMA overflow");
return next;
}
@@ -463,12 +469,14 @@ void usb_lld_init_endpoint(USBDriver *usbp, usbep_t ep) { void usb_lld_disable_endpoints(USBDriver *usbp) {
unsigned i;
- (void)usbp;
+ /* Resets the packet memory allocator.*/
+ pm_reset(usbp);
+
+ /* Disabling all endpoints.*/
for (i = 1; i <= USB_ENDOPOINTS_NUMBER; i++) {
EPR_TOGGLE(i, 0);
EPR_SET(i, 0);
}
-
}
/**
|