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#include "CH58x_common.h"
#include "utils.h"
#include "debug.h"
extern void (*if_handlers[])(USB_SETUP_REQ *request);
extern void (*ep_handlers[])();
void handle_devreq(USB_SETUP_REQ *request);
static uint8_t address;
/* EP0 + EP4(IN + OUT) */
__attribute__((aligned(4))) uint8_t ep0buf[64 + 64 + 64];
void usb_set_address(uint8_t ad)
{
address = ad;
}
void ctrl_start_load_block(void *buf, uint16_t len)
{
usb_start_load_block(ep0buf, buf, len, 1);
}
static void route_interfaces(USB_SETUP_REQ *request)
{
_TRACE();
uint8_t ifn = request->wIndex & 0xff;
PRINT("wInterfaceNumber: 0x%02x\n", ifn);
if (if_handlers[ifn])
if_handlers[ifn](request);
}
static void ep_handler()
{
_TRACE();
USB_SETUP_REQ *request = (USB_SETUP_REQ *)ep0buf;
uint8_t req = request->bRequest;
/* Each interface will have their own request handler */
uint8_t recip = request->bRequestType & USB_REQ_RECIP_MASK;
if (recip == USB_REQ_RECIP_INTERF) {
route_interfaces(request);
return;
}
uint8_t token = R8_USB_INT_ST & MASK_UIS_TOKEN;
switch(token) {
case UIS_TOKEN_SETUP:
print_setuppk(req);
if (recip == USB_REQ_RECIP_DEVICE) {
handle_devreq(request);
}
break;
case UIS_TOKEN_OUT:
if (req == USB_CLEAR_FEATURE) {
ctrl_ack();
}
case UIS_TOKEN_IN:
R8_USB_DEV_AD = address;
usb_load_next_chunk();
break;
default:
break;
}
}
void ctrl_init()
{
ep_cb_register(0, ep_handler);
dma_register(0, ep0buf);
}
static void route_enpoints()
{
_TRACE();
/* Workaround to solve a setup packet with EP 0x02 for unknown reason.
This happens when return from the bootloader or after a sotfware reset. */
uint8_t token = R8_USB_INT_ST & MASK_UIS_TOKEN;
if (token == UIS_TOKEN_SETUP) {
ep_handlers[0]();
}
uint8_t ep_num = R8_USB_INT_ST & MASK_UIS_ENDP;
if (ep_num < 8 && ep_handlers[ep_num])
ep_handlers[ep_num]();
}
static void handle_busReset()
{
_TRACE();
R8_USB_DEV_AD = 0;
R8_UEP0_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_UEP1_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_UEP2_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_UEP3_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_UEP4_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_UEP5_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_UEP6_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
R8_UEP7_CTRL = UEP_R_RES_ACK | UEP_T_RES_NAK;
}
static void handle_powerChange()
{
_TRACE();
if (R8_USB_MIS_ST & RB_UMS_SUSPEND) {
;// suspend
}
else {
;// resume
}
}
__INTERRUPT
__HIGH_CODE
void USB_IRQHandler(void) {
uint8_t intflag = R8_USB_INT_FG;
clear_handshake_sent_flag();
PRINT("\nusb: new interrupt\n");
print_intflag_reg();
if (intflag & RB_UIF_TRANSFER) {
PRINT("usb: RX Length reg: %d\n", R8_USB_RX_LEN);
print_status_reg();
route_enpoints();
}
else if (intflag & RB_UIF_BUS_RST) {
handle_busReset();
}
else if (intflag & RB_UIF_SUSPEND) {
handle_powerChange();
}
if (handshake_sent() == 0) {
PRINT("WARN: This transaction is being IGNORED!\n");
}
R8_USB_INT_FG = intflag; // clear interrupt flags
}
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