Hello, Freinds!
The problem with enumerating HID keyboard on the LPC1768. I connect the keyboard to the USB LPC1768 host. I am using the code library from Keil. At power LCP1768 start working with the keyboard correctly. But if I extract the keyboard and connect keyboard again - its doesnt work. Maybe its impossible to hot connection of keyboard to MCU?
My code below:
void USBH_Thread (void const *arg) {
char con = 0; /* Connection status of keyboard */
char con_ex = 40; /* Previous connection status + initial time in 100 ms intervals for initial display */
uint8_t out[64]; /* Output to keyboard LEDs */
out[0]=1;
USBH_Initialize (0); /* Initialize USB Host 0 */
while (1) {
con = USBH_HID_GetDeviceStatus(0) == usbOK; /* Get kbd connection status */
if ((con ^ con_ex) & 1) { /* If connection status changed */
if (con) {
USBH_HID_Write (0,(uint8_t *)&out,1);/* Turn on NUM LED */
printf ("\nKeyboard connected\n");
} else {
printf ("\nKeyboard disconnected ...\n");
}
con_ex = con;
} else if (con_ex > 1) {
con_ex -= 2; /* Decrement initial time */
if ((con_ex <= 1) && (!con)) {
printf ("\nNo keyboard connected ... \n");
con_ex = con;
} else {
osDelay(200);
}
}
osDelay(100);
}
}
osThreadDef(USBH_Thread, osPriorityNormal, 1, NULL);
