Wireless-Gate-Controller

This is a project for E-design 314, a course hosted by Stellenbosch University.

What does it do? It opens a gate, quite simply.

It is built on a prototype board developed by Stellenbosch University. The routing is minimal, however, and the idea is that students develop their own wiring/designs.

Here is the report: [goo.gl/RYua6i]goo.gl/RYua6i

Of the main hardware, it has a Renesas RL78/G14 as the brains, a Powertip 16x1 lcd for user feedback, external FT230XS uart chip to communicate with an external test program at 9600 baud, a DRV8801 motor driver (40kHz PWM), a TSOP348X infra-red receiver, and a 2kHz buzzer for warning conditions.

There also exists an infra-red remote to control the gate (open/close/emergency stop). The heart is a Renesas RL78/G12 1026A processor. I call it the heart rather affectionately since I had a watchdog timer going off which gave it a pretty heartbeat. I have also attached a 3.7V 1100mAH lithium battery, which might have been a little bit of an overkill.

Before I built the remote, I soldered in a transmitter/receiver led pair and a button, for testing purposes and so that coding is faster.

• Variable motor speed works
• ADC current reading + display reading works.
• Infrared tx (manchester encoding) works on G12. (tx also on G14 -- just for debugging/testing purposes).
• Receive also works and displays bits on lcd.

TODO:

• Add 3G. (Open with a cellphone anywhere in the world).
• Possibly add a card reader.

Debugging: have a look at the debug.h folder and change variables in core_setup() to enable certain serial/lcd debugging outputs

All buttons and switches are connected with pull-up resistors as standard.

When a new event occurs, the lcd will update with the latest event (with timestamp) accordingly

One can cycle through the events using up/down menu keys (buttons).

Events include:

• Opening
• Opened
• Closing
• Closed
• Autoclosing
• Autoclosed
• Mechanical Interference Event

Pinout

G14 Gate controller

CN2

Pin	Signal Name	RL78/G14 Pin Name	Function
1	GND	VSS / EVSS	Ground
2	VDD	VDD / EVDD	5V external input
8	P15	P15_SCK20_Z_SCL20_TRDIOD0	This is the 40kHz pwm enable for the motor (directed to the enable pin of the DRV8801)
9	P16	P16_TIO1_TO01_INTP5_TRDIOC0_IVREF0	This interrupt pin is triggered by data from the IR receiver
10	P17	P17_TI01_TO02_TRDIOA0_TRDCLK0_IVCMP0	This is connected to a button which closes gate upon pressing
11	P55	P55_TIO1_TO01_INTP5_TRDIOC0_IVREF0	This is connected to a button which shows the previous event upon pressing
12	P54	P54_TIO1_TO01_INTP5_TRDIOC0_IVREF0	This is connected to a button which shows the next event upon pressing
13	P53	P53_TIO1_TO01_INTP5_TRDIOC0_IVREF0	This is connected to a button which will stop the gate from moving upon pressing (as if an emergency stop)
14	P52	P52_TIO1_TO01_INTP5_TRDIOC0_IVREF0	This is connected to a button which opens gate upon pressing
15	P51	P51_INTP2_SO00_TXD0_TOOLTXD_TRGIOB	For testing. A button triggers this hardware interrupt which in turn sends a test manchestor string.
23	P76	P76_KR6_INTP10_RXD2	LCD Register select
24	P75	P75_KR5_INTP9_SCK01_SCL01	LCD Read /Write
25	P74	P74_KR4_INTP8_SI01_SDA01	LCD Enable
26	P73	P73_KR3_SO01	LCD Data channel 3
27	P72	P72_KR2_SO21	LCD Data channel 2
28	P71	P71_KR1_SI21_SDA21	LCD Data channel 1
29	P70	P70_KR0_SCK21_SCL21	LCD Data channel 0

CN3

Pin	Signal Name	RL78/G14 Pin Name	Function
1	GND	VSS / EVSS	Ground
2	VDD	VDD / EVDD	5V external input
3	P140	P140_PCLBUZ0_INTP6	2kHZ buzzer output
7	P02	P02_ANI17_SO10_TxD1	Serial output to external test program
8	P03	P03_ANI16_SI10_RxD1_SDA10	Serial input from external test program
10	P130	P130	For testing. Here is where a manchestor string is output to a built-in IR led.
11	P20	P20_ANI0_AVREFP	Unused ADC input
12	P21	P21_ANI0_AVREFM	Unused ADC input TODO: use potentiometer to cycle through menu.
13	P22	P22_ANI2_ANO0	This reads a potentiometer built-in the RL78 G14. It controls the speed of the gate motor.
14	P23	P23_ANI3_ANO1	This reads in a current value from 0 - 100mA, converted to a value between 0 - 5 V, with 10 bit accuracy.
22	P42	P42	This digital output controls the phase/direction that the gate motor is turning.
23	P41	P41	This digital output can sleep the motor driver (nSleep).
27	P06	P06	Digital in which listens for when the gate closes/is closed (port is polled ~ debouncing).
28	P05	P05	Digital in which listens for when the gate opens/is opened (port is polled ~ debouncing).
29	P30	P30/INTP3/RTC1HZ/SCK00/SCL00/TRJO0	Unused. Hardware interrupt which listens for when the gate opens/closes.

G12 Infra-red transmitter

Pin	Signal Name	RL78/G14 Pin Name	Function
3	P41	P41_ANI22_SO01_SDA01_TI02_TO02_INTP1	Open gate button
9	GND	VSS	Ground
10	VDD	VDD	3.3V external input
14	P13	P13_ANI19_TI00_TO00_INTP2	Close gate button
17	P10	P10_ANI16_PCLBUZ0_SCK00_SCL00	IR Led output

TODO: create G12 and G14 eagle library schematic