void usb_init(void)
{
static Bool bUsbInit = FALSE;
USBD_API_INIT_PARAM_T usb_param;
USB_CORE_DESCS_T desc;
ErrorCode_t ret = LPC_OK;
if(bUsbInit)
return;
usb_pin_clk_init();
/* Initialize call back structures */
memset((void *) &usb_param, 0, sizeof(USBD_API_INIT_PARAM_T));
usb_param.usb_reg_base = LPC_USB0_BASE;
usb_param.max_num_ep = 2;
usb_param.mem_base = USB_STACK_MEM_BASE;
usb_param.mem_size = USB_STACK_MEM_SIZE;
/* Set the USB descriptors */
desc.device_desc = (uint8_t *) &USB_DeviceDescriptor[0];
desc.string_desc = (uint8_t *) &USB_StringDescriptor[0];
/* Note, to pass USBCV test full-speed only devices should have both
descriptor arrays point to same location and device_qualifier set to 0.
*/
desc.high_speed_desc = (uint8_t *) &USB_FsConfigDescriptor[0];
desc.full_speed_desc = (uint8_t *) &USB_FsConfigDescriptor[0];
desc.device_qualifier = 0;
/* USB Initialization */
ret = USBD_API->hw->Init(&g_hUsb, &desc, &usb_param);
if (ret == LPC_OK) {
/* Init USB HID bridge interface */
ret = UCOM_init(g_hUsb, find_IntfDesc(desc.high_speed_desc, USB_DEVICE_CLASS_HUMAN_INTERFACE), &usb_param);
ret = dfu_init(g_hUsb, find_IntfDesc(desc.high_speed_desc, USB_DEVICE_CLASS_APP), &usb_param);
if (ret == LPC_OK) {
/* Make sure USB and IRQ priorities are same for this example */
NVIC_SetPriority(USB0_IRQn, 1);
/* Enable USB interrrupts */
NVIC_EnableIRQ(USB0_IRQn);
/* Now connect */
USBD_API->hw->Connect(g_hUsb, 1);
}
}
bUsbInit = TRUE;
}
/**
* @brief main routine for blinky example
* @return Function should not exit.
*/
int main(void)
{
USBD_API_INIT_PARAM_T usb_param;
USB_CORE_DESCS_T desc;
ErrorCode_t ret = LPC_OK;
USB_CORE_CTRL_T *pCtrl;
/* Initialize board and chip */
SystemCoreClockUpdate();
Board_Init();
/* enable clocks and pinmux */
USB_init_pin_clk();
/* Init USB API structure */
g_pUsbApi = (const USBD_API_T *) LPC_ROM_API->usbdApiBase;
/* initialize call back structures */
memset((void *) &usb_param, 0, sizeof(USBD_API_INIT_PARAM_T));
usb_param.usb_reg_base = LPC_USB_BASE;
usb_param.max_num_ep = 4;
usb_param.mem_base = USB_STACK_MEM_BASE;
usb_param.mem_size = USB_STACK_MEM_SIZE;
/* Set the USB descriptors */
desc.device_desc = (uint8_t *) USB_DeviceDescriptor;
desc.string_desc = (uint8_t *) USB_StringDescriptor;
#ifdef USE_USB0
desc.high_speed_desc = USB_HsConfigDescriptor;
desc.full_speed_desc = USB_FsConfigDescriptor;
desc.device_qualifier = (uint8_t *) USB_DeviceQualifier;
#else
/* Note, to pass USBCV test full-speed only devices should have both
* descriptor arrays point to same location and device_qualifier set
* to 0.
*/
desc.high_speed_desc = USB_FsConfigDescriptor;
desc.full_speed_desc = USB_FsConfigDescriptor;
desc.device_qualifier = 0;
#endif
/* USB Initialization */
ret = USBD_API->hw->Init(&g_hUsb, &desc, &usb_param);
if (ret == LPC_OK) {
/* WORKAROUND for artf45032 ROM driver BUG:
Due to a race condition there is the chance that a second NAK event will
occur before the default endpoint0 handler has completed its preparation
of the DMA engine for the first NAK event. This can cause certain fields
in the DMA descriptors to be in an invalid state when the USB controller
reads them, thereby causing a hang.
*/
pCtrl = (USB_CORE_CTRL_T *) g_hUsb; /* convert the handle to control structure */
g_Ep0BaseHdlr = pCtrl->ep_event_hdlr[0];/* retrieve the default EP0_OUT handler */
pCtrl->ep_event_hdlr[0] = EP0_patch;/* set our patch routine as EP0_OUT handler */
/* Init UCOM - USB to UART bridge interface */
ret = UCOM_init(g_hUsb, &desc, &usb_param);
if (ret == LPC_OK) {
/* Make sure USB and UART IRQ priorities are same for this example */
NVIC_SetPriority(LPC_USB_IRQ, 1);
/* enable USB interrupts */
NVIC_EnableIRQ(LPC_USB_IRQ);
/* now connect */
USBD_API->hw->Connect(g_hUsb, 1);
}
}
while (1) {
/* Sleep until next IRQ happens */
__WFI();
}
}
