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ChibiOS
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STM32 USB reset done right. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2739 35acf78f-673a-0410-8e92-d51de3d6d3f4
This commit is contained in:
gdisirio 2011-02-14 19:45:28 +00:00
parent 2c15c4864f
commit 20a4b38126
1 changed files with 4 additions and 6 deletions
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10
os/hal/platforms/STM32/usb_lld.c
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@ -319,7 +319,8 @@ void usb_lld_start(USBDriver *usbp) {
CORTEX_PRIORITY_MASK(STM32_USB_USB1_HP_IRQ_PRIORITY));
NVICEnableVector(USB_LP_CAN1_RX0_IRQn,
CORTEX_PRIORITY_MASK(STM32_USB_USB1_LP_IRQ_PRIORITY));
/* Releases the USB reset.*/
STM32_USB->CNTR = 0;
}
#endif
/* Reset procedure enforced on driver start.*/
@ -360,11 +361,8 @@ void usb_lld_stop(USBDriver *usbp) {
void usb_lld_reset(USBDriver *usbp) {
uint32_t cntr;
/* Powers up the transceiver while holding the USB in reset state.*/
STM32_USB->CNTR = CNTR_FRES;
/* Releases the USB reset, BTABLE is reset to zero.*/
STM32_USB->CNTR = 0;
/* Post reset initialization.*/
STM32_USB->BTABLE = 0;
STM32_USB->ISTR = 0;
STM32_USB->DADDR = DADDR_EF;
cntr = /*CNTR_ESOFM | */ CNTR_RESETM | /*CNTR_SUSPM |*/