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esp32-s2_dfu/src/portable/microchip/pic32mz/dcd_pic32mz.c

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/*
* The MIT License (MIT)
*
* Copyright (c) 2022 Jerzy Kasenberg
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This file is part of the TinyUSB stack.
*/
#include "tusb_option.h"
#if CFG_TUD_ENABLED && CFG_TUSB_MCU == OPT_MCU_PIC32MZ
#include <common/tusb_common.h>
#include <device/dcd.h>
#include <xc.h>
#include "usbhs_registers.h"
#define USB_REGS ((usbhs_registers_t *) (_USB_BASE_ADDRESS))
// Maximum number of endpoints, could be trimmed down in tusb_config to reduce RAM usage.
#ifndef EP_MAX
#define EP_MAX 8
#endif
typedef enum {
EP0_STAGE_NONE,
EP0_STAGE_SETUP_IN_DATA,
EP0_STAGE_SETUP_OUT_NO_DATA,
EP0_STAGE_SETUP_OUT_DATA,
EP0_STAGE_DATA_IN,
EP0_STAGE_DATA_IN_LAST_PACKET_FILLED,
EP0_STAGE_DATA_IN_SENT,
EP0_STAGE_DATA_OUT,
EP0_STAGE_DATA_OUT_COMPLETE,
EP0_STAGE_STATUS_IN,
EP0_STAGE_ADDRESS_CHANGE,
} ep0_stage_t;
typedef struct {
uint8_t * buffer;
// Total length of current transfer
uint16_t total_len;
// Bytes transferred so far
uint16_t transferred;
uint16_t max_packet_size;
uint16_t fifo_size;
// Packet size sent or received so far. It is used to modify transferred field
// after ACK is received or when filling ISO endpoint with size larger then
// FIFO size.
uint16_t last_packet_size;
uint8_t ep_addr;
} xfer_ctl_t;
static struct
{
// Current FIFO RAM address used for FIFO allocation
uint16_t fifo_addr_top;
// EP0 transfer stage
ep0_stage_t ep0_stage;
// Device address
uint8_t dev_addr;
xfer_ctl_t xfer_status[EP_MAX][2];
} _dcd;
// Two endpoint 0 descriptor definition for unified dcd_edpt_open()
static tusb_desc_endpoint_t const ep0OUT_desc =
{
.bLength = sizeof(tusb_desc_endpoint_t),
.bDescriptorType = TUSB_DESC_ENDPOINT,
.bEndpointAddress = 0x00,
.bmAttributes = { .xfer = TUSB_XFER_CONTROL },
.wMaxPacketSize = CFG_TUD_ENDPOINT0_SIZE,
.bInterval = 0
};
static tusb_desc_endpoint_t const ep0IN_desc =
{
.bLength = sizeof(tusb_desc_endpoint_t),
.bDescriptorType = TUSB_DESC_ENDPOINT,
.bEndpointAddress = 0x80,
.bmAttributes = { .xfer = TUSB_XFER_CONTROL },
.wMaxPacketSize = CFG_TUD_ENDPOINT0_SIZE,
.bInterval = 0
};
#define XFER_CTL_BASE(_ep, _dir) &_dcd.xfer_status[_ep][_dir]
static void ep0_set_stage(ep0_stage_t stage)
{
_dcd.ep0_stage = stage;
}
static ep0_stage_t ep0_get_stage(void)
{
return _dcd.ep0_stage;
}
/*------------------------------------------------------------------*/
/* Controller API
*------------------------------------------------------------------*/
void dcd_init(uint8_t rhport)
{
// Disable endpoint interrupts for now
USB_REGS->INTRRXEbits.w = 0;
USB_REGS->INTRTXEbits.w = 0;
// Enable Reset/Suspend/Resume interrupts only
USB_REGS->INTRUSBEbits.w = 7;
dcd_connect(rhport);
}
void dcd_int_enable(uint8_t rhport)
{
(void) rhport;
USBCRCONbits.USBIE = 1;
}
void dcd_int_disable(uint8_t rhport)
{
(void) rhport;
USBCRCONbits.USBIE = 0;
}
void dcd_set_address(uint8_t rhport, uint8_t dev_addr)
{
(void) rhport;
ep0_set_stage(EP0_STAGE_ADDRESS_CHANGE);
// Store address it will be used later after status stage is done
_dcd.dev_addr = dev_addr;
// Confirm packet now, address will be set when status stage is detected
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.w = (USBHS_EP0_DEVICE_SERVICED_RXPKTRDY | USBHS_EP0_DEVICE_DATAEND);
}
void dcd_remote_wakeup(uint8_t rhport)
{
(void) rhport;
USB_REGS->POWERbits.RESUME = 1;
#if CFG_TUSB_OS != OPT_OS_NONE
osal_task_delay(10);
#else
// TODO: Wait in non blocking mode
unsigned cnt = 2000;
while (cnt--) __asm__("nop");
#endif
USB_REGS->POWERbits.RESUME = 0;
}
void dcd_connect(uint8_t rhport)
{
(void) rhport;
USB_REGS->POWERbits.HSEN = TUD_OPT_HIGH_SPEED ? 1 : 0;
USB_REGS->POWERbits.SOFTCONN = 1;
}
void dcd_disconnect(uint8_t rhport)
{
(void) rhport;
USB_REGS->POWERbits.SOFTCONN = 1;
}
void dcd_sof_enable(uint8_t rhport, bool en)
{
(void) rhport;
(void) en;
// TODO implement later
}
TU_ATTR_ALWAYS_INLINE static inline bool is_in_isr(void)
{
return (_CP0_GET_STATUS() & (_CP0_STATUS_EXL_MASK | _CP0_STATUS_IPL_MASK)) != 0;
}
static void epn_rx_configure(uint8_t endpoint, uint16_t endpointSize,
uint16_t fifoAddress, uint8_t fifoSize,
uint32_t transferType)
{
uint8_t old_index = USB_REGS->INDEXbits.ENDPOINT;
// Select endpoint register set (same register address is used for all endpoints.
USB_REGS->INDEXbits.ENDPOINT = endpoint;
// Configure the Endpoint size
USB_REGS->INDEXED_EPCSR.RXMAXPbits.RXMAXP = endpointSize;
// Set up the fifo address.
USB_REGS->RXFIFOADDbits.RXFIFOAD = fifoAddress;
// Resets the endpoint data toggle to 0
USB_REGS->INDEXED_EPCSR.RXCSRL_DEVICEbits.CLRDT = 1;
// Set up the FIFO size
USB_REGS->RXFIFOSZbits.RXFIFOSZ = fifoSize;
USB_REGS->INDEXED_EPCSR.RXCSRH_DEVICEbits.ISO = transferType == 1 ? 1 : 0;
// Disable NYET Handshakes for interrupt endpoints
USB_REGS->INDEXED_EPCSR.RXCSRH_DEVICEbits.DISNYET = transferType == 3 ? 1 : 0;
// Restore the index register.
USB_REGS->INDEXbits.ENDPOINT = old_index;
// Enable the endpoint interrupt.
USB_REGS->INTRRXEbits.w |= (1 << endpoint);
}
static void epn_tx_configure(uint8_t endpoint, uint16_t endpointSize,
uint16_t fifoAddress, uint8_t fifoSize,
uint32_t transferType)
{
uint8_t old_index = USB_REGS->INDEXbits.ENDPOINT;
// Select endpoint register set (same register address is used for all endpoints.
USB_REGS->INDEXbits.ENDPOINT = endpoint;
// Configure the Endpoint size
USB_REGS->INDEXED_EPCSR.TXMAXPbits.TXMAXP = endpointSize;
// Set up the fifo address
USB_REGS->TXFIFOADDbits.TXFIFOAD = fifoAddress;
// Resets the endpoint data toggle to 0
USB_REGS->INDEXED_EPCSR.TXCSRL_DEVICEbits.CLRDT = 1;
// Set up the FIFO size
USB_REGS->TXFIFOSZbits.TXFIFOSZ = fifoSize;
USB_REGS->INDEXED_EPCSR.TXCSRH_DEVICEbits.ISO = 1 == transferType ? 1 : 0;
// Restore the index register
USB_REGS->INDEXbits.ENDPOINT = old_index;
// Enable the interrupt
USB_REGS->INTRTXEbits.w |= (1 << endpoint);
}
static void tx_fifo_write(uint8_t endpoint, uint8_t const * buffer, size_t count)
{
size_t i;
volatile uint8_t * fifo_reg;
fifo_reg = (volatile uint8_t *) (&USB_REGS->FIFO[endpoint]);
for (i = 0; i < count; i++)
{
*fifo_reg = buffer[i];
}
}
static int rx_fifo_read(uint8_t epnum, uint8_t * buffer)
{
uint32_t i;
uint32_t count;
volatile uint8_t * fifo_reg;
fifo_reg = (volatile uint8_t *) (&USB_REGS->FIFO[epnum]);
count = USB_REGS->EPCSR[epnum].RXCOUNTbits.RXCNT;
for (i = 0; i < count; i++)
{
buffer[i] = fifo_reg[i & 3];
}
return count;
}
static void xfer_complete(xfer_ctl_t * xfer, uint8_t result, bool in_isr)
{
dcd_event_xfer_complete(0, xfer->ep_addr, xfer->transferred, result, in_isr);
}
static void ep0_fill_tx(xfer_ctl_t * xfer_in)
{
uint16_t left = xfer_in->total_len - xfer_in->transferred;
if (left)
{
xfer_in->last_packet_size = tu_min16(xfer_in->max_packet_size, left);
tx_fifo_write(0, xfer_in->buffer + xfer_in->transferred, xfer_in->last_packet_size);
xfer_in->transferred += xfer_in->last_packet_size;
left = xfer_in->total_len - xfer_in->transferred;
}
if (xfer_in->last_packet_size < xfer_in->max_packet_size || left == 0)
{
switch (ep0_get_stage())
{
case EP0_STAGE_SETUP_IN_DATA:
case EP0_STAGE_DATA_IN:
case EP0_STAGE_DATA_IN_SENT:
ep0_set_stage(EP0_STAGE_DATA_IN_LAST_PACKET_FILLED);
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.TXPKTRDY = 1;
break;
case EP0_STAGE_SETUP_OUT_NO_DATA:
ep0_set_stage(EP0_STAGE_STATUS_IN);
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.w = (USBHS_EP0_DEVICE_SERVICED_RXPKTRDY | USBHS_EP0_DEVICE_DATAEND);
break;
case EP0_STAGE_DATA_OUT_COMPLETE:
ep0_set_stage(EP0_STAGE_STATUS_IN);
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.w = (USBHS_EP0_DEVICE_SERVICED_RXPKTRDY | USBHS_EP0_DEVICE_DATAEND);
break;
default:
break;
}
}
else
{
switch (ep0_get_stage())
{
case EP0_STAGE_SETUP_IN_DATA:
ep0_set_stage(EP0_STAGE_DATA_IN);
// fall through
case EP0_STAGE_DATA_IN:
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.TXPKTRDY = 1;
break;
default:
break;
}
}
}
static void epn_fill_tx(xfer_ctl_t * xfer_in, uint8_t epnum)
{
uint16_t left = xfer_in->total_len - xfer_in->transferred;
if (left)
{
xfer_in->last_packet_size = tu_min16(xfer_in->max_packet_size, left);
tx_fifo_write(epnum, xfer_in->buffer + xfer_in->transferred, xfer_in->last_packet_size);
}
USB_REGS->EPCSR[epnum].TXCSRL_DEVICEbits.TXPKTRDY = 1;
}
static bool ep0_xfer(xfer_ctl_t * xfer, int dir)
{
if (dir == TUSB_DIR_OUT)
{
if (xfer->total_len)
{
switch (_dcd.ep0_stage)
{
case EP0_STAGE_DATA_OUT_COMPLETE:
case EP0_STAGE_SETUP_OUT_DATA:
ep0_set_stage(EP0_STAGE_DATA_OUT);
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.SVCRPR = 1;
break;
default:
TU_ASSERT(0);
}
}
else
{
switch (_dcd.ep0_stage)
{
case EP0_STAGE_DATA_IN_SENT:
ep0_set_stage(EP0_STAGE_NONE);
// fall through
case EP0_STAGE_NONE:
xfer_complete(xfer, XFER_RESULT_SUCCESS, true);
break;
default:
break;
}
}
}
else // IN
{
ep0_fill_tx(xfer);
}
return true;
}
/*------------------------------------------------------------------*/
/* DCD Endpoint port
*------------------------------------------------------------------*/
bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * desc_edpt)
{
(void) rhport;
uint8_t const epnum = tu_edpt_number(desc_edpt->bEndpointAddress);
uint8_t const dir = tu_edpt_dir(desc_edpt->bEndpointAddress);
xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, dir);
TU_ASSERT(epnum < EP_MAX);
xfer->max_packet_size = tu_edpt_packet_size(desc_edpt);
xfer->fifo_size = xfer->max_packet_size;
xfer->ep_addr = desc_edpt->bEndpointAddress;
if (epnum != 0)
{
if (dir == TUSB_DIR_OUT)
{
epn_rx_configure(epnum, xfer->max_packet_size, _dcd.fifo_addr_top, __builtin_ctz(xfer->fifo_size) - 3, desc_edpt->bmAttributes.xfer);
_dcd.fifo_addr_top += (xfer->fifo_size + 7) >> 3;
}
else
{
epn_tx_configure(epnum, xfer->max_packet_size, _dcd.fifo_addr_top, __builtin_ctz(xfer->fifo_size) - 3, desc_edpt->bmAttributes.xfer);
_dcd.fifo_addr_top += (xfer->fifo_size + 7) >> 3;
}
}
return true;
}
void dcd_edpt_close_all (uint8_t rhport)
{
(void) rhport;
// Reserve EP0 FIFO address
_dcd.fifo_addr_top = 64 >> 3;
for (int i = 1; i < EP_MAX; ++i)
{
tu_memclr(&_dcd.xfer_status[i], sizeof(_dcd.xfer_status[i]));
}
}
void dcd_edpt_close(uint8_t rhport, uint8_t ep_addr)
{
(void) rhport;
(void) ep_addr;
}
bool dcd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes)
{
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, dir);
(void) rhport;
xfer->buffer = buffer;
xfer->total_len = total_bytes;
xfer->last_packet_size = 0;
xfer->transferred = 0;
if (epnum == 0)
{
return ep0_xfer(xfer, dir);
}
if (dir == TUSB_DIR_OUT)
{
USB_REGS->INTRRXEbits.w |= (1u << epnum);
}
else // IN
{
epn_fill_tx(xfer, epnum);
}
return true;
}
void dcd_edpt_stall(uint8_t rhport, uint8_t ep_addr)
{
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
(void) rhport;
if (epnum == 0)
{
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.SENDSTALL = 1;
}
else
{
if (dir == TUSB_DIR_OUT)
{
USB_REGS->EPCSR[epnum].RXCSRL_DEVICEbits.SENDSTALL = 1;
}
else
{
USB_REGS->EPCSR[epnum].TXCSRL_DEVICEbits.SENDSTALL = 1;
}
}
}
void dcd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr)
{
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
(void) rhport;
if (epnum == 0)
{
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.SENDSTALL = 0;
}
else
{
if (dir == TUSB_DIR_OUT)
{
USB_REGS->EPCSR[epnum].RXCSRL_DEVICEbits.w &= ~(USBHS_EP_DEVICE_RX_SENT_STALL | USBHS_EP_DEVICE_RX_SEND_STALL);
USB_REGS->EPCSR[epnum].RXCSRL_DEVICEbits.CLRDT = 1;
}
else
{
USB_REGS->EPCSR[epnum].TXCSRL_DEVICEbits.w &= ~(USBHS_EP_DEVICE_TX_SENT_STALL | USBHS_EP_DEVICE_TX_SEND_STALL);
USB_REGS->EPCSR[epnum].TXCSRL_DEVICEbits.CLRDT = 1;
}
}
}
/*------------------------------------------------------------------*/
/* Interrupt Handler
*------------------------------------------------------------------*/
static void ep0_handle_rx(void)
{
int transferred;
xfer_ctl_t * xfer = XFER_CTL_BASE(0, TUSB_DIR_OUT);
TU_ASSERT(xfer->buffer,);
transferred = rx_fifo_read(0, xfer->buffer + xfer->transferred);
xfer->transferred += transferred;
if (transferred < xfer->max_packet_size || xfer->transferred == xfer->total_len)
{
ep0_set_stage(EP0_STAGE_DATA_OUT_COMPLETE);
xfer_complete(xfer, XFER_RESULT_SUCCESS, true);
}
else
{
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.SVCRPR = 1;
}
}
static void epn_handle_rx_int(uint8_t epnum)
{
uint8_t ep_status;
int transferred;
xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, TUSB_DIR_OUT);
ep_status = USB_REGS->EPCSR[epnum].RXCSRL_DEVICEbits.w;
if (ep_status & USBHS_EP_DEVICE_RX_SENT_STALL)
{
USB_REGS->EPCSR[epnum].RXCSRL_DEVICEbits.w &= ~USBHS_EP_DEVICE_RX_SENT_STALL;
}
if (ep_status & USBHS_EP0_HOST_RXPKTRDY)
{
TU_ASSERT(xfer->buffer != NULL,);
transferred = rx_fifo_read(epnum, xfer->buffer + xfer->transferred);
USB_REGS->EPCSR[epnum].RXCSRL_HOSTbits.RXPKTRDY = 0;
xfer->transferred += transferred;
if (transferred < xfer->max_packet_size || xfer->transferred == xfer->total_len)
{
xfer_complete(xfer, XFER_RESULT_SUCCESS, true);
}
}
}
static void epn_handle_tx_int(uint8_t epnum)
{
uint8_t ep_status = USB_REGS->EPCSR[epnum].TXCSRL_DEVICEbits.w;
xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, TUSB_DIR_IN);
if (ep_status & USBHS_EP_DEVICE_TX_SENT_STALL)
{
USB_REGS->EPCSR[epnum].TXCSRL_DEVICEbits.w &= ~USBHS_EP_DEVICE_TX_SENT_STALL;
}
else
{
xfer->transferred += xfer->last_packet_size;
if (xfer->last_packet_size < xfer->max_packet_size || xfer->transferred == xfer->total_len)
{
xfer->last_packet_size = 0;
xfer_complete(xfer, XFER_RESULT_SUCCESS, true);
}
else
{
epn_fill_tx(xfer, epnum);
}
}
}
static void ep0_handle_int(void)
{
__USBHS_CSR0L_DEVICE_t ep0_status;
union {
tusb_control_request_t request;
uint32_t setup_buffer[2];
} setup_packet;
xfer_ctl_t * xfer_in = XFER_CTL_BASE(0, TUSB_DIR_IN);
uint8_t old_index = USB_REGS->INDEXbits.ENDPOINT;
// Select EP0 registers
USB_REGS->INDEXbits.ENDPOINT = 0;
ep0_status = USB_REGS->EPCSR[0].CSR0L_DEVICEbits;
if (ep0_status.SENTSTALL)
{
// Stall was sent. Reset the endpoint 0 state.
// Clear the sent stall bit.
ep0_set_stage(EP0_STAGE_NONE);
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.SENTSTALL = 0;
}
if (ep0_status.SETUPEND)
{
// This means the current control transfer end prematurely. We don't
// need to end any transfers. The device layer will manage the
// premature transfer end. We clear the SetupEnd bit and reset the
// driver control transfer state machine to waiting for next setup
// packet from host.
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.SVSSETEND = 1;
ep0_set_stage(EP0_STAGE_NONE);
}
if (ep0_status.RXPKTRDY)
{
switch (ep0_get_stage())
{
default:
// Data arrived at unexpected state, this must be setup stage packet after all.
// Fall through
case EP0_STAGE_NONE:
// This means we were expecting a SETUP packet and we got one.
setup_packet.setup_buffer[0] = USB_REGS->FIFO[0];
setup_packet.setup_buffer[1] = USB_REGS->FIFO[0];
if (setup_packet.request.bmRequestType_bit.direction == TUSB_DIR_OUT)
{
// SVCRPR is not set yet, it will be set later when out xfer is started
// Till then NAKs will hold incommint data
ep0_set_stage(setup_packet.request.wLength == 0 ? EP0_STAGE_SETUP_OUT_NO_DATA : EP0_STAGE_SETUP_OUT_DATA);
}
else
{
USB_REGS->EPCSR[0].CSR0L_DEVICEbits.SVCRPR = 1;
ep0_set_stage(EP0_STAGE_SETUP_IN_DATA);
}
dcd_event_setup_received(0, &setup_packet.request.bmRequestType, true);
break;
case EP0_STAGE_DATA_OUT:
ep0_handle_rx();
break;
}
}
else
{
switch (ep0_get_stage())
{
case EP0_STAGE_STATUS_IN:
// Status was just sent, this concludes request, notify client
ep0_set_stage(EP0_STAGE_NONE);
xfer_complete(xfer_in, XFER_RESULT_SUCCESS, true);
break;
case EP0_STAGE_DATA_IN:
// Packet sent, fill more data
ep0_fill_tx(xfer_in);
break;
case EP0_STAGE_DATA_IN_LAST_PACKET_FILLED:
ep0_set_stage(EP0_STAGE_DATA_IN_SENT);
xfer_complete(xfer_in, XFER_RESULT_SUCCESS, true);
break;
case EP0_STAGE_ADDRESS_CHANGE:
// Status stage after set address request finished, address can be changed
USB_REGS->FADDRbits.FUNC = _dcd.dev_addr;
ep0_set_stage(EP0_STAGE_NONE);
break;
default:
break;
}
}
// Restore register index
USB_REGS->INDEXbits.ENDPOINT = old_index;
}
void dcd_int_handler(uint8_t rhport)
{
int i;
uint8_t mask;
__USBCSR2bits_t csr2_bits;
uint16_t rxints = USB_REGS->INTRRX;
uint16_t txints = USB_REGS->INTRTX;
csr2_bits = USBCSR2bits;
(void) rhport;
IFS4CLR = _IFS4_USBIF_MASK;
if (csr2_bits.SOFIF && csr2_bits.SOFIE)
{
dcd_event_bus_signal(0, DCD_EVENT_SOF, true);
}
if (csr2_bits.RESETIF)
{
dcd_edpt_open(0, &ep0OUT_desc);
dcd_edpt_open(0, &ep0IN_desc);
dcd_event_bus_reset(0, USB_REGS->POWERbits.HSMODE ? TUSB_SPEED_HIGH : TUSB_SPEED_FULL, true);
}
if (csr2_bits.SUSPIF)
{
dcd_event_bus_signal(0, DCD_EVENT_SUSPEND, true);
}
if (csr2_bits.RESUMEIF)
{
dcd_event_bus_signal(0, DCD_EVENT_RESUME, true);
}
// INTRTX has bit for EP0
if (txints & 1)
{
txints ^= 1;
ep0_handle_int();
}
for (mask = 0x02, i = 1; rxints != 0 && mask != 0; mask <<= 1, ++i)
{
if (rxints & mask)
{
rxints ^= mask;
epn_handle_rx_int(i);
}
}
for (mask = 0x02, i = 1; txints != 0 && mask != 0; mask <<= 1, ++i)
{
if (txints & mask)
{
txints ^= mask;
epn_handle_tx_int(i);
}
}
}
#endif
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