I’m using Tiva C series launchpad EK-TM4C1123GXL, staffed with TM4C 123GPMH MPU.
I’m trying to code USB bulk device operation. Example doesn’t work- failed to enumerate, according dmesg. So I have no chance o use provided libusb. So , I put on my glasses and start coding.
I initialize USB0 with following code. My ISR does nothing, but light BLUE LED. Guess what- no matter what I do, connect/ disconnect cable, try to enumerate device. ISR got never called, and LED was not lit.
Please direct me or hint what are my mistakes. Any help appreciated.
#define USB_PINDM GPIO_PIN_4 /* portD GPIO pin 4 GPIO_PIN_4 d-*/
#define USB_PINDP GPIO_PIN_5 /* portD GPIO pin 5 GPIO_PIN_5 d+*/
#define USB_PINID GPIO_PIN_0 /* PORTB GPIO pin 4 GPIO_PIN_0 id*/
#define USB_PINVBUS GPIO_PIN_1 /* PORTB GPIO pin 5 GPIO_PIN_1 vbus*/
//++++++++++++++++++++++++++++++++configure USB++++++++++++++++++++++++++++
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);// Signal lines
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOD)) ;;// Signal lines
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);/*/ ID,VBUS*/
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOB));;
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);//id,vbus lines
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOB)) ;; //id,vbus lines
GPIOPinTypeUSBDigital(GPIO_PORTB_BASE, (USB_PINID | USB_PINVBUS));/* ID(pin0),VBUS(pin1)*/
GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, (USB_PINDM | USB_PINDP));// Signal lines
GPIOPadConfigSet(GPIO_PORTB_BASE,(USB_PINID | USB_PINVBUS),GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPD);// pull down for ID, VBUS pins
USBModeConfig(USB_MODE_DEV_VBUS,0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_USB0);
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_USB0));;
SysCtlUSBPLLEnable();
USBClockEnable(USB0_BASE, 7/*8*/, USB_CLOCK_INTERNAL);
IntDisable(INT_USB0);
USBIntDisableControl(USB0_BASE, (uint32_t)USB_INTCTRL_ALL);/*prevent interrupt by a glitch */
USBIntRegister(USB0_BASE, USB0_ISR_handle); /* REGISTER CALLBACK*/
USBIntEnableControl(USB0_BASE, USB_INTCTRL_RESET |
USB_INTCTRL_DISCONNECT |
USB_INTCTRL_RESUME |
USB_INTCTRL_SUSPEND |
USB_INTCTRL_SOF);
IntEnable(INT_USB0);
USBIntEnableEndpoint(USB0_BASE, USB_EP_0);
USBIntEnableEndpoint(USB0_BASE, USB_EP_1);
