usbconsole.cpp

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/**
 * @file    usbconsole.cpp
 * @brief   USB-over-serial configuration
 *
 * @date Oct 14, 2013
 * @author Andrey Belomutskiy, (c) 2012-2020
 */
 
#include "pch.h"
 
 
#if EFI_USB_SERIAL
 
#include "usbconsole.h"
#include "usbcfg.h"
#include "mpu_util.h"
 
static bool isUsbSerialInitialized = false;
 
/**
 * start USB serial using hard-coded communications pins (see comments inside the code)
 */
void usb_serial_start() {
#ifndef BOARD_SERIAL
    // populate serial number based on chip unique number
    usbPopulateSerialNumber(MCU_SERIAL_NUMBER_LOCATION, MCU_SERIAL_NUMBER_BYTES);
#endif
 
    efiSetPadMode("USB DM", EFI_USB_SERIAL_DM, PAL_MODE_ALTERNATE(EFI_USB_AF));
    efiSetPadMode("USB DP", EFI_USB_SERIAL_DP, PAL_MODE_ALTERNATE(EFI_USB_AF));
 
    /*
     * Initializes a serial-over-USB CDC driver.
     */
    sduObjectInit(&SDU1);
    sduStart(&SDU1, &serusbcfg);
 
    /*
     * Activates the USB driver and then the USB bus pull-up on D+.
     * Note, a delay is inserted in order to not have to disconnect the cable
     * after a reset.
     */
// See also https://github.com/rusefi/rusefi/issues/705
#ifndef EFI_SKIP_USB_DISCONNECT
    usbDisconnectBus(serusbcfg.usbp);
    chThdSleepMilliseconds(250);
#endif/* EFI_SKIP_USB_DISCONNECT */
    usbStart(serusbcfg.usbp, &usbcfg);
    usbConnectBus(serusbcfg.usbp);
 
    isUsbSerialInitialized = true;
}
 
bool is_usb_serial_ready() {
    return isUsbSerialInitialized && SDU1.config->usbp->state == USB_ACTIVE;
}
 
#else
bool is_usb_serial_ready() {
    return false;
}
 
#endif /* EFI_USB_SERIAL */