User manual

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 68

Configuration Files and Example Projects

5.3.1.5 Verify Output

Ensure that the EVK is connected to the PSoC 4 Pioneer Kit. Touch any CapSense button on the kit;

the corresponding LED toggles, with audio feedback through the buzzer (see Figure 5-29). If an I

write error occurs while loading the configuration to the MBR3 device, the RGB LED on the PSoC 4

Pioneer Kit blinks in blue continuously indicating an I

C write error.

Figure 5-29. Verify Output

5.3.2 Host_Interrupt_LED_ON_Time_PSoC4_Pioneer_Kit

5.3.2.1 Project Description

This example project uses PSoC 4 as the I

C master (host) to implement the LED-on time feature on

the CY3280-MBR3 EVK using the host interrupt and host-controlled GPOs feature. This project also

shows how to read the status register of the device with an I

C master upon an interrupt from the

device.

In this project, PSoC 4 loads the following configuration:

■ Four button sensors enabled

■ Host interrupt enabled

■ Host-controlled GPOs

On every touch and release, the device issues a host interrupt (active-low pulse of 250-µs duration)

to the PSoC 4 Pioneer Kit. Upon receipt of the interrupt, PSoC 4 sends an I

C read command to

read the button status register (0xAA-0xAB). Depending upon the content of the register, PSoC 4

controls the onboard RGB LED. See Table 5-4 for the expected RGB output. Also, it detects if the

host interrupt was generated because of a touch or a release. If a button is released, the corre-

sponding RGB LED keeps glowing for one second before going off. This is implemented using the

counter (TCPWM component) available in PSoC 4.