Cypress CY3674, User Manual

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42 EZ-USB Development Kit User Guide, Doc. # 001-66390 Rev. *D
EZ-USB Firmware Frameworks
5.4.2.4 EZUSB_Susp()
void EZUSB_Susp(void)
This function suspends the processor in response to a USB suspend event. This function will not
return until the suspend is cleared by a USB bus resume or a wake-up event on the EZUSB wake-up
pin. If a suspend event is not pending, this function will return immediately.
5.4.2.5 EZUSB_Resume()
void EZUSB_Resume(void)
This function generates the K-state on the USB bus required for a USB device remote wake-up. This
function should be called following a USB suspend. It automatically determines if the wake-up is
result of a USB resume or a remote wake-up and generates the K-state accordingly.
5.4.2.6 I
2
C Routines
void EZUSB_InitI2C(void);
BOOL EZUSB_WriteI2C_(BYTE addr, BYTE length, BYTE xdata *dat);
BOOL EZUSB_ReadI2C_(BYTE addr, BYTE length, BYTE xdata *dat);
BOOL EZUSB_WriteI2C(BYTE addr, BYTE length, BYTE xdata *dat);
BOOL EZUSB_ReadI2C(BYTE addr, BYTE length, BYTE xdata *dat);
void EZUSB_WaitForEEPROMWrite(BYTE addr);
These functions automate access to I
2
C devices (such as the EEPROM), 7-segment display and
buttons on the DVK board. See the vend_ax and dev_io firmware examples for details on using
these functions.