The following document contains information on Cypress products.
AN07-00161-2E
FR Family
FR80 MB91660series
Method of Controlling VFD Module
with External Bus Access
AN07-00161-2E
All Rights Reserved.
The contents of this document are subject to change without notice. Customers are advised to consult with
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The information, such as descriptions of function and application circuit examples, in this document are
presented solely for the purpose of reference to show examples of operations and uses of Fujitsu
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such information. When you develop equipment incorporating the device based on such information, you
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Copyright© 2009 FUJITSU MICRELECTRONICS LIMITED all rights reserved
1
AN07-00161-2E
Revision History
Revision
Date
Description
1.0
June 16, 2008
Initial release
2.0
April 13, 2009
Cahnge the document name
2
AN07-00161-2E
Subject
Revision History.................................................................................................................... 2
Subject.................................................................................................................................. 3
1
Introduction..................................................................................................................... 4
2
Manual............................................................................................................................ 5
2.1
3
Hardware Configuration ................................................................................................... 6
3.1
4
Manual used by this application.................................................................................. 5
Recommended circuit diagram ................................................................................... 6
Software.......................................................................................................................... 7
4.1
Operation ................................................................................................................. 7
4.2
Sample software ....................................................................................................... 7
3
AN07-00161-2E
1
Introduction
This application note explains the method of controlling the fluorescent display tube module
(Graphic display module: GP1118A01B) (Futaba Corporation) by external bus of Fujitsu 32-bit
MCU FR80 family. MB91F662 of FR80 family is used in the explanation of control methods.
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AN07-00161-2E
2
Manual
2.1
Manual used by this application
- See the following URL for the application note of the fluorescent display tube module (Graphic
display module: GP1118A01B) (Futaba Corporation). The user's registration is required.
http://www.futaba.co.jp/display/module/full_dot_md/mdl_dotmatrix.html
- The hardware manuals concerning and Data sheets concerning the Fujitsu microcontroller can be
downloaded from the following URLs.
http://jp.fujitsu.com/microelectronics/brochures/（Japanese）
http://www.fujitsu.com/global/services/microelectronics/documents/（English）
- The above-mentioned URLs are subject to change without a previous notice.
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AN07-00161-2E
3
Hardware Configuration
3.1
Recommended circuit diagram
3.3V
3.3V
Microcontroller
FR80 MB91660 series
P10/D08
P11/D09
P12/D10
P13/D11
P14/D12
P15/D13
P16/D14
P17/D15
P67/INT23_2
P56/WR0X
P55/RDX
P53/CS3X
P20/A00
Level
shifter
Fluorescent display tube
5.0V
GP1118A01B
D0
D1
D2
D3
D4
D5
D6
D7
INT
WR
RD
CS
C/D
Figure 1. MB91660series and example of connecting fluorescent display tube module
Because the fluorescent display tube drive circuit is built into GP1118A01, the display can be easily
controlled according to the external 8-bit data bus access of MB91660 series. The connection
example is shown in Figure 1. Because microcontroller FR80 family MB91660series is 3V product
and fluorescent display tube GP1118A01B is 5V product, be sure to use the level shifter to connect
the microcontroller FR80 family and fluorescent display tube. So, pins (INT23_2, WR0X, RDX, and
CS3X) of the control system shall be equipped with the pull-up resistor to 3.3V power supply to
prevent a malfunction. Connect the pin A00 of MB91660series with the pin C/D of GP1118A01B, to
set data with A00=1 (odd number address) access and set a command with A00=0 (even number
address) access. Because the pulse is output from the INT pin of GP1118A01B every frame, the
character and the picture can be displayed on the fluorescent display tube by setting the display data
with an external interrupt processing of MB91660series.
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AN07-00161-2E
4
Software
4.1
Operation
Because various font data such as kanji character, hiragana, figure, and sign is stored in
GP1118A01B, the characters can be easily displayed. This section explains the sample software
blinking the displayed characters every 128 frames by using the command displaying the font data to
display “Fujitsu FR80 MB91F662” in Figure 2 here.
Figure 2. Display of fluorescent display tube
4.2
Sample software
The relationship among functions in the sample software is shown below.
main()
Reading
(1)
clock()
(2)
external_bus()
(3)
(4)
external_interrupt()
Interrupt
ext_int_23()
display1()
font_data_set()
Figure 3 Relationship among functions
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VFD_control()
AN07-00161-2E
Function
name
Argument
Return value
Content of
processing
void clock(void)
void
void
This function sets the operation clock and the FLASH wait of the microcontroller as
follows.
CPU/peripheral function operation clock 32MHz (at original frequency of 4MHz)
External bus operation clock 4MHz and FLASH wait one cycle
void clock(void)
{
/****** ROM access wait setting ******/
IO_FCTLR.bit.FWC = 1;
/* FLASH wait 1 */
/****** Clock Set ******/
IO_CLK.IO_DIVR0.byte = 0x00;
IO_CLK.IO_DIVR1.byte = 0x70;
IO_CLK.IO_DIVR2.byte = 0x00;
IO_UCCR.byte = 0x00;
IO_UCCR.byte = 0x06;
IO_UCCR.byte = 0x07;
IO_CLKG.IO_PLLCR.hword = 0x27F0;
IO_PORT3.IO_EPFR19.bit.XAE = 1;
IO_CLKG.IO_CSELR.bit.SCEN = 1;
IO_CLKG.IO_CSTBR.bit.SOSW = 6;
/* BCLK:1divid */
/* TCLK:8dvide */
/* PCLK:1divid */
/* USBCLK:disable */
/* USBCLK:PLL-1divid */
/* USBCLK:enable */
/* CLK:8_PLL, USB:24_PLL */
/* enable X0A,X1A */
/* enable SBCLK */
/* set SBCLK oscillation stabilization wait time */
IO_CLKG.IO_CSELR.bit.PCEN = 1;
/* enable PLL */
while( 1 != IO_CLKG.IO_CMONR.bit.PCRDY ){
;
}
IO_CLKG.IO_CSELR.bit.CKS = 2;
/* Clock Select(MCLK => PLL) */
while( 2 != IO_CLKG.IO_CMONR.bit.CKM ){
;
}
}
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AN07-00161-2E
Function
name
Argument
Return value
Content of
processing
void external_bus (void)
void
void
This function sets the external bus access of the microcontroller as follows.
void external_bus(void)
{
unsigned int check;
/****** setting of external bus access ******/
IO_PORT2.IO_PFR2.bit.PFR20 = 1;
/* A00 output */
IO_PORT2.IO_PFR5.bit.PFR53 = 1;
/* CS3 output */
IO_PORT2.IO_PFR5.bit.PFR55 = 1;
/* RDX output */
IO_PORT2.IO_PFR5.bit.PFR56 = 1;
/* WR0X output*/
IO_PORT2.IO_PFR1.byte = 0xFF;
/* D08-D15 output */
IO_EBUS.IO_ASR0 = 0x00000000;
IO_EBUS.IO_ACR3 = 0x00000008;
IO_EBUS.IO_AWR3 = 0x0000FFF0;
IO_EBUS.IO_ASR3 = 0x00240007;
/* CS0 setting invalidity */
/* Separate bus, Data 8bit */
/* CS wait setting */
/* 0x0024_0000- 64KB External bus area */
/* Little endian, WRX/CS enable */
/* write data check */
check = IO_EBUS.IO_ASR3;
if(check != 0x00240007)
{
IO_EBUS.IO_ASR3 = 0x00240007;
}
}
9
/* rewrite */
AN07-00161-2E
Function
name
Argument
Return value
Content of
processing
void external_interrupt (void)
void
void
This function sets an external interrupt of the microcontroller as follows.
Enables input of INT23_2and rising edge detection interrupt.
unsigned char pattern;
void external_interrupt(void)
{
pattern=0x00;
IO_ICR[2].byte = 0x10;
IO_PORT2.IO_PFR6.bit.PFR67 = 1;
IO_PORT3.IO_EPFR31.bit.INT23E0 = 0;
IO_PORT3.IO_EPFR31.bit.INT23E1 = 1;
IO_ELVR2.bit.LBLA23= 0x02;
IO_EIRR2.byte= 0x00;
IO_ENIR2.byte= 0x80;
/* INT23 interrupt level setting */
/* INT23_2 input enable */
/* INT23_2 input enable */
/* INT23_2 input enable */
/* Riging edge */
/* Interrput flag clear */
/* INT23 enable */
}
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AN07-00161-2E
Function name
Argument
Return value
Content of
processing
void VFD_control (void)
void
void
This function initializes the fluorescent display tube.
#define VFD_Data_Access
#define VFD_Comand_Access
(volatile unsigned char *)(0x240000)
(volatile unsigned char *)(0x240001)
void VFD_control(void)
{
unsigned int i,j,k;
unsigned char check_data;
*VFD_Comand_Access = 0x14;
*VFD_Data_Access = 0x20;
*VFD_Comand_Access = 0x04;
*VFD_Comand_Access = 0x0E;
*VFD_Data_Access = 0x00;
*VFD_Comand_Access = 0x0F;
*VFD_Data_Access = 0x00;
*VFD_Comand_Access = 0x08;
for(i=0;i<0x90F;i++)
{
*VFD_Data_Access = 0x00;
}
*VFD_Comand_Access = 0x0E;
*VFD_Data_Access = 0x00;
*VFD_Comand_Access = 0x0F;
*VFD_Data_Access = 0x00;
*VFD_Comand_Access = 0x09;
for(j=0;j<0x90F;j++)
{
check_data = *VFD_Data_Access;
if(check_data != 0x00)
{
*VFD_Comand_Access = 0x0E;
*VFD_Data_Access = 0x00; //0x00
*VFD_Comand_Access = 0x0F;
*VFD_Data_Access = 0x00; //0x00
*VFD_Comand_Access = 0x08;
for(k=0;k<0x90F;k++)
{
*VFD_Data_Access = 0x00;
}
}
}
*VFD_Comand_Access = 0x03;
}
11
/* internal function command */
/* R/W address auto increment */
/* lower address setting of write command */
/* 0x00 */
/* upper address setting of write command */
/* 0x00 */
/* Display data write command */
/* RAM clear (blank display) */
/* lower address setting of read command */
/* 0x00 */
/* upper address setting of read command */
/* 0x00 */
/* Display data read command */
/* RAM data check */
/* lower address setting of write command */
/* 0x00 */
/* upper address setting of write command */
/* 0x00 */
/* Display data write command */
/* RAM clear (blank display) */
/* Display 1,2 ON */
AN07-00161-2E
Function
name
Argument
Return value
Content of
processing
__interrupt void ext_int_23(void)
void
void
This function updates the display data at the frame frequency from the fluorescent
display tube module input at an external interrupt. Blink the display characters every 128
frames.
__interrupt void ext_int_23(void)
{
IO_EIRR2.byte
= 0x00;
switch(pattern)
{
case(0x00):
display1(0x00);
break;
/* Brightness display of 100% */
case(0x80):
display1(0xFF);
break;
/* Brightness display of 0% */
default:
break;
}
pattern = pattern +1;
}
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AN07-00161-2E
Function name
Argument
Return value
Content of
processing
void display1(char set)
Char set: Brightness data
void
This function specifies the brightness data for an argument, and displays the characters
in the fluorescent display tube.
Moreover, set the display position, the display letter type, and the font size of the
characters.
void display1(char set)
{
unsigned int i;
//--------------brightness adjustment ------------------*VFD_Comand_Access = 0x13;
/* brightness adjustment command */
*VFD_Data_Access = set;
/* brightness setting */
for(i=0;i<100;i++);
//--------------Character data of the first line------------------*VFD_Comand_Access = 0x0E;
/* lower address setting of write command */
*VFD_Data_Access = 0x00;
/* lower address setting (Display start address) */
*VFD_Comand_Access = 0x0F;
/* upper address setting of write command */
*VFD_Data_Access = 0x00;
/* upper address setting (Display start address) */
for(i=0;i<250;i++);
font_data_set(0x59,0x19,0x00);
/* "Wealth" 24*24 Font size */
font_data_set(0x4E,0x0B,0x00);
/* "Person" 24*24 Font size */
font_data_set(0x4C,0x14,0x00);
/* "Expert" 24*24 Font size */
font_data_set(0x00,0x00,0xC8);
/*"Blank" 8*16 font */
font_data_set(0x06,0x01,0x80);
/* "F" 12*24 font size */
font_data_set(0x12,0x01,0x80);
/* "R" 12*24 font size */
font_data_set(0x18,0x00,0x80);
/* "8" 12*24 font size */
font_data_set(0x10,0x00,0x80);
/* "0" 12*24 font size */
//--------------Character data of the second line------------------*VFD_Comand_Access = 0x0E;
/* lower address setting of write command */
*VFD_Data_Access = 0x04;
/* lower address setting (Display start address) */
*VFD_Comand_Access = 0x0F;
/* upper address setting of write command */
*VFD_Data_Access = 0x00;
/* upper address setting (Display start address) */
for(i=0;i<250;i++);
font_data_set(0x0D,0x01,0x80);
/* "M" 12*24 font size */
font_data_set(0x02,0x01,0x80);
/* "B" 12*24 font size */
font_data_set(0x19,0x00,0x80);
/* "9" 12*24 font size */
font_data_set(0x11,0x00,0x80);
/* "1" 12*24 font size */
font_data_set(0x06,0x01,0x80);
/* "F" 12*24 font size */
font_data_set(0x16,0x00,0x80);
/* "6" 12*24 font size */
font_data_set(0x16,0x00,0x80);
/* "6" 12*24 font size */
font_data_set(0x12,0x00,0x80);
/* "2" 12*24 font size */
}
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Function
name
Argument
Return value
Content of
processing
void font_data_set(char font1, char font2, char size)
char 1 character-code lower data
char font2 character-code upper data
char size font size
void
This function displays the characters that uses font ROM of the fluorescent display tube
module. Specify the font type and the font size for an argument.
void font_data_set(char font1,char font2,char size)
{
unsigned int i;
*VFD_Comand_Access = 0x07;
*VFD_Data_Access = font1;
*VFD_Data_Access = font2;
*VFD_Data_Access = size;
for(i=0;i<250;i++);
}
/* font ROM data display command */
/* font data */
/* font data */
/* font size */
/* waiting time of font data setting */
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