When I copy the struct from the includes it says that it is already defined. I hope I get better at this soon.

handler.c:
#include <os.h>
#include <usbdi.h>
#include <usb.h>
#include <nspireio2.h>
#include "main.h"

int *controllerCount = 0;

static int match(device_t self) {
struct usb_attach_arg *uaa = device_get_ivars(self);

if (!uaa->iface){
return UMATCH_NONE;
}

usb_interface_descriptor_t *id = usbd_get_interface_descriptor(uaa->iface);

if (!id){
return UMATCH_NONE;
}

if (id->bInterfaceClass == UICLASS_VENDOR &&
id->bInterfaceSubClass == UISUBCLASS_XBOX360_CONTROLLER &&
id->bInterfaceProtocol == UIPROTO_XBOX360_GAMEPAD){
return UMATCH_IFACECLASS;
}else{
return UMATCH_NONE;
}
}

struct softc_360 {
// Standered
device_t sc_dev;
usbd_interface_handle sc_iface;
usbd_pipe_handle sc_intrpipe;
int sc_ep_addr;
struct s_usb_pipe_buf sc_ibuf;
int sc_isize;
int sc_enabled;

// Device specific
int16_t buttons;
signed char lTrigger;
signed char rTrigger;
int16_t leftX;
int16_t leftY;
int16_t rightX;
int16_t rightY;
};

struct report_360 {
char unused[2];
int16_t buttons;
signed char lTrigger;
signed char rTrigger;
int16_t leftX;
int16_t leftY;
int16_t rightX;
int16_t rightY;
char unused2[6];
};

static void intr_360(usbd_xfer_handle __attribute__((unused)) xfer, usbd_private_handle addr, usbd_status status){
struct softc_360 *sc = addr;

struct report_360 *ibuf = (struct report_360 *)sc->sc_ibuf.buf;

if(status != USBD_NORMAL_COMPLETION){
return;
}

sc->buttons = ibuf->buttons;
sc->lTrigger = ibuf->lTrigger;
sc->rTrigger = ibuf->rTrigger;
sc->leftX = ibuf->leftX;
sc->leftY = ibuf->leftY;
sc->rightX = ibuf->rightX;
sc->rightY = ibuf->rightY;
}

static int attach(device_t self){
struct softc_360 *sc = device_get_softc(self);

struct usb_attach_arg *uaa = device_get_ivars(self);
usbd_status err;

if(sc == NULL){
return ENXIO;
}

sc->sc_iface = uaa->iface;
sc->sc_dev = self;
usb_endpoint_descriptor_t *ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 0);
sc->sc_ep_addr = ed->bEndpointAddress;
sc->sc_isize = sizeof(struct softc_360);

usbd_set_protocol(sc->sc_iface, 0);
usbd_set_idle(sc->sc_iface, 0, 0);

sc->sc_ibuf.dummy1 = 0;
sc->sc_ibuf.dummy2 = 0;
sc->sc_ibuf.buf = malloc(sc->sc_isize);

if(!sc->sc_ibuf.buf){
return ENXIO;
}

err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr, USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, &sc->sc_ibuf, sc->sc_isize, intr_360, USBD_DEFAULT_INTERVAL);

if(err){
free(sc->sc_ibuf.buf);
return ENXIO;
}

sc->sc_enabled = 1;
*controllerCount = 1;

struct usb_device_request_t ledReq;

return 0;
}

static int detach(device_t self){
struct softc_360 *sc = device_get_softc(self);

if(sc->sc_enabled){
usbd_abort_pipe(sc->sc_intrpipe);
usbd_close_pipe(sc->sc_intrpipe);
free(sc->sc_ibuf.buf);
sc->sc_enabled = 0;
}

*controllerCount = 0;

return 0;
}

static int (*methods[])(device_t) = {match, attach, detach, NULL};

void register360(void){
nl_relocdata((unsigned*)methods, sizeof(methods) / sizeof(methods[0]) - 1);
usb_register_driver(2, methods, "c360", 0, sizeof(struct softc_360));

FILE *file;
file = fopen("/documents/ndless/xboxPointer.cfg.tns", "w");
fwrite(controllerCount, 1, sizeof(controllerCount), file);
fclose(file);
}
Build output:
rm -f *.o *.elf *.tns ./*.gdb
nspire-gcc -Wall -W -marm -Os -c handler.c
handler.c: In function 'attach':
handler.c:118:30: error: storage size of 'ledReq' isn't known
handler.c:118:30: warning: unused variable 'ledReq' [-Wunused-variable]
make: *** [handler.o] Error 1

I do think I need struct in there. I do think it can find it just fine as it does not like me making a new struct of the same name.

EDIT:
Ok, it looks like removing struct worked... That is needed sometimes, newish to c, but not programming. Thanks for the help.