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
| 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 |
| 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. |
| 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