Renesas RL78/G11 User manual

USER'S MANUAL
R01AN3890EC0110 Rev. 1.10 Page 1 of 24
Sep. 15, 2017
RL78/G11
Portable Environment (Temperature, Humidity, Luminance)
Monitor
Introduction
This user's manual describes a Renesas microcontroller RL78/G11 application for a portable environment (temperature,
humidity, luminance) monitor.
Target Device
RL78/G11
R01AN3890EC0110
Rev. 1.10
Sep. 15, 2017

RL78/G11 Portable Environment (Temperature, Humidity, Luminance) Monitor
R01AN3890EC0110 Rev. 1.10 Page 2 of 24
Sep. 15, 2017
Contents
1. Outline of Function.........................................................................................................3
1.1 Introduction of the Portable Environment Monitor..................................................................3
1.2 Brief Introduction of the Portable Environment Monitor Demo Board..................................3
1.3 Introduction of Operation........................................................................................................... 4
1.3.1 Enter Menu Display State.....................................................................................................4
1.3.2 Change Display Menu........................................................................................................... 4
1.3.3 Set High Limit Value and Low Limit Value ......................................................................... 5
1.3.4 Quit Menu Display State and Save Setting Values............................................................6
2. Introduction of Hardware...............................................................................................7
2.1 Introduction of PCB ....................................................................................................................7
2.2 Hardware Block Diagram............................................................................................................8
2.3 Main MCU.....................................................................................................................................9
2.4 Power Supply Circuit.................................................................................................................. 9
2.5 Temperature Collection Circuit................................................................................................10
2.6 Humidity Collection Circuit......................................................................................................11
2.7 Luminance Collection Circuit ..................................................................................................12
2.8 Buzzer Alarm Circuit.................................................................................................................13
2.9 Key Detection Circuit................................................................................................................13
3. Schematic, PCB and Bill of Materials .........................................................................14
3.1 Schematic ..................................................................................................................................14
3.2 PCB.............................................................................................................................................15
3.3 Bill of Materials..........................................................................................................................16
4. Introduction of Software..............................................................................................17
4.1 Integrated Development Environment....................................................................................17
4.2 List of Option Byte Setting.......................................................................................................17
4.3 Installation Procedure ..............................................................................................................18
4.4 Flow Chart..................................................................................................................................19
4.4.1 Flow Chart of Main Function..............................................................................................19
4.4.2 Flow Chart of System Initialization ...................................................................................20
4.4.3 Flow Chart of Key Module..................................................................................................21
5. Sample Code ................................................................................................................24
6. Reference Documents..................................................................................................24
Website and Support...........................................................................................................24

RL78/G11 Portable Environment (Temperature, Humidity, Luminance) Monitor
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1. Outline of Function
1.1 Introduction of the Portable Environment Monitor
In people's lives, with the growing interest in the living environment, and with the changes of temperature, humidity
and luminance in the air, which have a direct impact on human body comfort and emotions, temperature, humidity and
luminance detection is very necessary. The Portable Environment Monitor can detect these properties in the air in real
time. According to the range of most comfortable environmental values, the user can set a high limit and low limit
alarm by key.
The demo board is composed of the main control board (power supply circuit, AD collection circuit, etc.) and LCM
board (LCM12864).
The portable environment (temperature, humidity, luminance) monitor is shown in Figure 1.1.
Figure 1.1 The Portable Environment (Temperature, Humidity, Luminance) Monitor
1.2 Brief Introduction of the Portable Environment Monitor Demo Board
The Portable Environment Monitor uses 3 AAA batteries as power supply. The detected temperature, humidity and
luminance are displayed on the LCM, and the user can set alarm high limit and alarm low limit by key. When one of the
three detected values is above its high limit or below its low limit, the buzzer will alarm, and at the same time, LCM
will display corresponding up arrow icon or down arrow icon. The high limit value and low limit value are stored in the
RL78/G11 internal data flash. The block diagram of demo board is shown in Figure 1.2.
Figure 1.2 Block Diagram of the Portable Environment Monitor Demo Board
RL78/G11
(R5F1056A)
AD
collection Buzzer
Key
detection
LCM
Internal data flash
(Setting values storage)

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1.3 Introduction of Operation
1.3.1 Enter Menu Display State
In the normal display state, press the “MENU” key for entering menu display state. On the first screen, the LCM
displays high temperature limit.
The process of entering menu display state is shown in Figure 1.3.
Figure 1.3 Process of Entering Menu Display State
1.3.2 Change Display Menu
In the menu display state, each time you press the “MENU” key, the menu interface cycles to display the low
temperature limit, the high humidity limit, the low humidity limit, the high luminance limit, the low luminance limit,
and the high temperature limit.
The process of changing display menu is shown in Figure 1.4.
Figure 1.4 Process of Changing Display Menu
Press “MENU” key
Press
“MENU”
key
Press
“MENU”
key
Press
“MENU”
key
Press
“MENU”
key
Press
“MENU”
key
Press
“MENU”
key

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1.3.3 Set High Limit Value and Low Limit Value
In any of the menu interfaces, you can press the “+” key or “-” key for setting its high limit value or low limit value.
The setting ranges of high temperature limit and low temperature limit is from -40 oC to 100 oC. The setting ranges of
high humidity limit and low humidity limit is from 0 %RH to 100 %RH. The setting ranges of high luminance limit and
low luminance limit is from 0 LUX to 1200 LUX. Each time you press the “+” key or “-” key, the high temperature
limit, the low temperature limit, the high humidity limit and the low humidity limit plus 1or minus 1. Each time you
press the “+” key or “-” key, the high luminance limit and the low luminance limit plus 50 or minus 50.
The process of setting high limit value and low limit value is shown in Figure 1.5.
Below figures show an example of how to set the high temperature limit value.
Below figures show an example of how to set the low luminance limit value.
Figure 1.5Process of Setting High Limit Value and Low Limit Value
Press “+”
key
Press “-”
key
Press “+”
key
Press “-”
key

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1.3.4 Quit Menu Display State and Save Setting Values
In any of the menu interfaces, press the “OK” key for returning normal display state, and the new setting value of high
limit and low limit will be stored in the RL78/G11 internal data flash.
The process of quitting menu display state is shown in Figure 1.6.
Figure 1.6Process of Quitting Menu Display State
Press “OK” key

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2. Introduction of Hardware
2.1 Introduction of PCB
The top view of the portable environment monitor is shown in Figure 2.1.
Figure 2.1 Top View of the Portable Environment Monitor
The bottom view of the portable environment monitor is shown in Figure 2.2.
Figure 2.2Bottom View of the Portable Environment Monitor
Buzzer drive circuit
Humidity collection module
Power supply
LCM12864
E1 emulator interface
LCM contrast ratio
setting
RL78/G11
“–” key
“+” key
“MENU” key
“OK” key
Temperature collection
circuit
Luminance collection circuit

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2.2 Hardware Block Diagram
The hardware block diagram of the portable environment monitor is shown in Figure 2.3.
Figure 2.3 Hardware Block Diagram of the Portable Environment Monitor

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2.3 Main MCU
The demo board of the portable environment monitor uses RL78/G11 as main MCU. The Flash ROM size of RL78/G11
is 16 KB and the RAM size is 1.5 KB. The peripheral functions of RL78/G11 and their applications are shown in Table
2.1.
Table 2.1 Peripheral Functions and Their Applications
Peripheral functions
Usage
P20/ANI0
A/D sampling: the detection of temperature voltage
P21/ANI1
A/D sampling: the detection of luminance voltage
P22ANI2
A/D sampling: the detection of humidity voltage
P137/INTP0
External interrupt: the detection of “MENU” key
P122/INTP1
External interrupt: the detection of “+” key
P121/INTP2
External interrupt: the detection of “-” key
P01/INTP5
External interrupt: the detection of “OK” key
P30
LCM driver: the chip selection port (CS)
P56
LCM driver: the serial data output port (SID)
P55
LCM driver: the serial clock output port (SCLK)
Channel 0 of TAU0
1ms timer for LCM display
P00
Buzzer driver
The interface control circuit of RL78/G11 is shown in Figure 2.4.
Figure 2.4 Interface Control Circuit of RL78/G11
2.4 Power Supply Circuit
The portable environment monitor uses 3 AAA batteries as power supply.
The power supply circuit is shown in Figure 2.5.
Figure 2.5 Power Supply Circuit

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2.5 Temperature Sampling Circuit
The temperature sampling circuit directly uses a linear voltage output temperature sensor (TC1047A), whose output
voltage is directly proportional to the temperature. The TC1047A accurately measures the temperature from -40 ° C to
+ 125 ° C and its supply voltage range is 2.5 V to 5.5 V.
The correspondence formula between TC1047A output voltage and the temperature:
Vout = 10 mV/°C × (Temperature°C) + 500 mV
The temperature TC1047A output voltage and the temperature sampling circuit are shown in Figure 2.6.
Figure 2.6 Temperature sampling Circuit
The characteristic curve between TC1047A output voltage and the temperature is shown in Figure 2.7.
Figure 2.7 Characteristic Curve Between Voltage and the Temperature

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2.6 Humidity Sampling Circuit
The humidity sampling circuit uses a module sensor (HTG3515CH) to acquire humidity, whose output voltage is
directly proportional to the humidity. HTG3515CH can measure the humidity from 0 %RH to 100 %RH.
The correspondence formula between output voltage and the humidity:
Humidity = 0.0376×Vout - 41.4 (The unit of Vout is mv.)
The humidity sampling circuit is shown in Figure 2.8.
Figure 2.8 Humidity Sampling Circuit

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2.7 Luminance Sampling Circuit
The luminance sampling circuit is a series voltage divider circuit that is composed of a photoelectric transistor
(TEMT6000) and resistance R9. There is a linear relationship between the collector light current (IPCE) of TEMT6000
and luminance. The output interface can get a voltage value that changes with the IPCE, resulting in the corresponding
luminance value.
The correspondence formula between interface output voltage (Vout) and the luminance:
Luminance = IPCE ×2, IPCE = Vout / 10 K ×1000 (The unit of Vout is v.)
The luminance sampling circuit is shown in Figure 2.9.
Figure 2.9Luminance Sampling Circuit
The characteristic curve between collector light current (IPCE) and the luminance is shown in Figure 2.10.
Figure 2.10 Characteristic Curve between Emitter Current and Luminance

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2.8 Buzzer Alarm Circuit
The buzzer is used for the alarm function. When the measured values exceed the high limit or the low limit, the buzzer
will sound.
The buzzer alarm circuit is shown in Figure 2.11.
Figure 2.11 Buzzer Alarm Circuit
2.9 Key Detection Circuit
The key detection circuit has four independent keys, namely "MENU", "+", "-", "OK". You can set the high temperature
limit, the low temperature limit, the high humidity limit, the low humidity limit, the high luminance limit and the low
luminance limit through these four keys.
Normally, the key outputs a high level, and when the key is pressed, the key outputs a low level. Level changing
becomes a falling edge signal, which will be detected by an external interrupt INTP, and in order to prevent chattering,
key detection circuit in parallel with a 0.1 uf capacitor.
The key detection circuit is shown in Figure 2.12.
Figure 2.12 Key Detection Circuit

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3. Schematic, PCB and Bill of Materials
3.1 Schematic
The schematic of the portable environment monitor is shown in Figure 3.1.
Figure 3.1 Schematic

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3.2 PCB
The PCB of the portable environment monitor is shown in Figure 3.2.
Figure 3.2 PCB

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3.3 Bill of Materials
The bill of materials of the portable environment monitor is shown in Table 3.1.
Table 3.1 Bill of Materials
Designator
Quantity
Part Name
Manufacturer
Description
BT1
1
―
―
Battery Socket
Buzzer
1
12095
―
Buzzer (12*7.6 mm)
C1
1
GRT21BC81C106ME01L
Murata
Capacitor (10uF, 16VDC,
±10%, 0805)
C2, C3, C5, C6,
C7, C8, C9, C10
8
GRM21BR71E104KA01L
Murata
Capacitor (0.1uF, 16VDC,
±10%, 0805)
C4
1
GRM21BR71A105KA01L
Murata
Capacitor (1uF,10VDC,
±10%, 0805)
D1
1
1N4001
Vishay
Diode (GF1A)
D2
1
1N4148
Vishay
Diode (SOD-323)
E1
1
2514-6002
3M Limited
CON (7X2, 2.54 mm)
J2
1
HG1286412-LYH
TSINGTEK
Display Co., Ltd
LCM (5 V)
Q1
1
S8050
BILIN
Amplifier (SOT23A)
Q2
1
TEMT6000
Vishay
Luminance sensor
(SOT23A)
R1
1
ERJ6GEYJ102V
BOURNS
Resistor (1 KΩ, ±5%, 0805)
R2, R3, R4, R5,
R6, R7, R8, R9
8
ERJ6GEYJ103V
BOURNS
Resistor (10 KΩ, ±5%,
0805)
R10
1
3266
BOURNS
Potentiometer (10 KΩ)
SW1, SW2,
SW3, SW4,
SW5
5
B3W-1000
OMRON
Push Switch (6*6 mm, DIP)
T1, T2
2
―
―
Test Point
U1
1
G11
Renesas
Electronics
R5F1056AGSP
(LSSOP20_4.4*6.5_0.65
mm)
U2
1
TC1047A
Microchip
Temperature
sensor(SOT23B)
U3
1
HTG3515
TE
CONNECTIVITY
(TE)
Humidity sensor (HTG3515
Module)

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4. Introduction of Software
4.1 Integrated Development Environment
The integrated development environment of the portable environment monitor is shown in Table 4.1.
Table 4.1 Integrated Development Environments
Item
Contents
Integrated development environment
e2 studio V5.3.0.023 (Renesas Electronics Corporation)
CS+ V6.00.00 (Renesas Electronics Corporation)
C compiler
CC-RL V1.02 (Renesas Electronics Corporation)
Debugger
E1 (Renesas Electronics Corporation)
4.2 List of Option Byte Setting
The option byte setting of the portable environment monitor is shown in Table 4.2.
Table 4.2 Option Byte Setting
Address
Setting
Description
000C0H/010C0H
00000000B
Watchdog timer operation is stopped (count is stopped after reset)
000C1H/010C1H
00010010B
LVD: interrupt & reset mode
000C2H/010C2H
11100000B
HOCO: 24 MHz, operation voltage range: 2.7 V~5.5 V
000C3H/010C3H
10000100B
On-chip debugging is enabled.

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4.3 Installation Procedure
The following is necessary to build the sample application.
Download the Data Flash Library corresponding to your development environment from Renesas website and copy to
the “Lib” folder in the project.
Data Flash Library for CC/RL78
https://www.renesas.com/en-us/software/D3016256.html
(Destination folder)…..\Lib
- pfdl.h
- pfdl.inc
- pfdl.lib
- pfdl_types.h

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4.4 Flow Chart
4.4.1 Flow Chart of Main Function
The flow chart of the main function is shown in Figure 4.1.
main()
R_Systeminit()
Display menu ?Yes
No
Yes
Yes
Get high limit and low limit from
dataflash
Enable 1s timer for LCM
OK key pressed ?
Write the high limit and low limit of
temperature, humidity and luminance
to dataflash
1s has passed?
No
No
Variable and flag initialization
Erase data flash block 0
Acquire internal reference 1.45V
voltage
Acquire ANI0 voltage( temperature)
Acquire ANI2 voltage( humidity)
Acquire ANI1 voltage( luminance )
Calculate temperature, humidity and
luminance value
Clear 1s timer flag
Display temperature, humidity and
luminance
Temperature, humidity and
luminance beyond high limit or low
limit ?
Yes
No
Display arrow symbol
Buzzer alarm
Display high limit or low limit
Figure 4.1 Flow Chart of Main Function

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4.4.2 Flow Chart of System Initialization
The flow chart of system initialization is shown in Figure 4.2.
R_Systeminit()
Initialize I/O port
R_PORT_Create()
Initialize KEY INTP
R_KEY_Create()
Initialize BUZZER
R_BUZZER_Create()
Initialize ADC
R_ADC_Create()
Initialize LCM12864
R_LCM_CGRAM()
R_LCM_Create()
Initialize TAU
R_TAU_Create()
return
Figure 4.2 Flow Chart of System Initialization