Page 152 - Programming the Photon Getting Started With the Internet of Things

<td><input type="button" onClick="setRelay('31')" value="Relay 3 ON
"/></td>

<td><input type="button" onClick="setRelay('30')" value="Relay 3 OF
F"/></td>
</tr>
<tr>
<td><input type="button" onClick="setRelay('41')" value="Relay 4 ON

"/></td>
<td><input type="button" onClick="setRelay('40')" value="Relay 4 OF
F"/></td>

</tr>
</table>
</body>
</html>

Programmer Shield

The programmer shield is for the very advanced users who want to gain full access and
control over the Photon board. This shield is an FT2232H-based JTAG programmer shield
that is fully compatible with OpenOCD and Broadcom’s WICED integrated development

environment (IDE). The FT2232H chip is set up to provide a USB JTAG and USB
universal asynchronous receiver/transmitter (UART) interface for the Photon board. It can
also be configured by the user by reprogramming the on-board config electrically erasable

programmable read-only memory (EEPROM). The unused pins are marked and broken
out on to easy-to-access headers as shown in Figure 7.5.

Figure 7.5 JTAG programming shield.