我正在做一个USB MSC项目,它需要不同的USB记忆棒才能连接到stm32f429.我正在使用HAL库.
有些U盘需要重新启动或重新枚举才能进行文件读写操作.
我想重新启动USB进程,比如断开和连接USB闪存盘,但只使用软件.
我已经try 使用下面的函数重置USB端口,但它没有导致USB枚举.
static uint8_t USBMNG_ResetUsbPort(void)
{
uint32_t curState = ((USBx_HPRT0 ) & 0x01UL);
if(curState != 0)
{
USBx_HPRT0 &= ~(1UL << 12);
}
else
{
USBx_HPRT0 &= ~(1UL << 12);
USBx_HPRT0 |= (1UL << 12);
}
return 1;
}
uint8_t USBMNG_USBDevDisconnect(void)
{
/* In case phy is stopped, ensure to ungate and restore the phy CLK */
USBx_PCGCCTL &= ~(USB_OTG_PCGCCTL_STOPCLK | USB_OTG_PCGCCTL_GATECLK);
USBx_DEVICE->DCTL |= USB_OTG_DCTL_SDIS;
return 1;
}
uint8_t USBMNG_USBDevConnect(void)
{
/* In case phy is stopped, ensure to ungate and restore the phy CLK */
USBx_PCGCCTL &= ~(USB_OTG_PCGCCTL_STOPCLK | USB_OTG_PCGCCTL_GATECLK);
USBx_DEVICE->DCTL &= ~USB_OTG_DCTL_SDIS;
return 1;
}