Nuvoton NuMicro M480 Series User manual

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M480 emWin
Document Information
Abstract
Introduce the steps to build and launch emWin for the M480 series
microcontroller (MCU).
Apply to
NuMicro®M480 series
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.
Nuvoton is providing this document only for reference purposes of NuMicro microcontroller based system design.
Nuvoton assumes no responsibility for errors or omissions.
All data and specifications are subject to change without notice.
For additional information or questions, please contact: Nuvoton Technology Corporation.
www.nuvoton.com
M480 emWin Quick Start Guide

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Table of Contents
1INTRODUCTION...................................................................................................................... 3
2EMWIN BSP DIRECTORY STRUCTURE ....................................................................... 4
2.1 Sample Codes (sampleCode) .................................................................................................... 4
2.2 Configuration Files (ThirdParty\emWin\Config)..................................................................... 4
2.3 Documents (ThirdParty\emWin\Doc)........................................................................................ 4
2.4 Include Files (ThirdParty\emWin\Include) ............................................................................... 4
2.5 Library (ThirdParty\emWin\Lib)................................................................................................. 4
2.6 Tools (ThirdParty\emWin\Tool) ................................................................................................. 5
3EMWIN SAMPLE CODE ....................................................................................................... 6
3.1 Project Structure.......................................................................................................................... 6
3.2 System Initialization.................................................................................................................... 7
3.3 emWin Initialization ..................................................................................................................... 8
3.4 Build emWin Project.................................................................................................................... 9
3.5 Download and Run ...................................................................................................................... 9
3.6 Touch Screen.............................................................................................................................. 10
4EMWIN GUIBUILDER..........................................................................................................13
4.1 Create Widget............................................................................................................................. 13
4.2 Handle Widget Event................................................................................................................. 13
5CHANGE DISPLAY PANEL...............................................................................................15
5.1 emWin Display Configuration.................................................................................................. 15
5.2 Display Driver............................................................................................................................. 16

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1 Introduction
emWin is a graphic library with graphical user interface (GUI) designed to provide an efficient,
processor and display controller-independent GUI for any application that operates with a
graphical display.
Nuvoton provides emWin GUI library for free with the M480 series microcontroller (MCU)
supporting up to 320x240 (16 bpp) resolution. The emWin platform can be implemented on
HMI for industrial, machines, appliances, etc.

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2 emWin BSP Directory Structure
This chapter introduces emWin related files and directories in the M480 BSP.
2.1 Sample Codes (sampleCode)
emWin_GUIDemo
Utilize emWin library to demonstrate widgets feature.
emWin_SimpleDemo
Utilize emWin library to demonstrate interactive feature.
2.2 Configuration Files (ThirdParty\emWin\Config)
GUI_X.c
Configuration and system dependent code for GUI.
GUIConf.c
Display controller initialization source code.
GUIConf.h
A header file configures emWins features, fonts, etc.
LCDConf.c
Display controller configuration source code.
LCDConf.h
Display driver configuration header file.
2.3 Documents (ThirdParty\emWin\Doc)
AN03002_Custom_
Widget_Type.pdf
emWin custom widget type creation guide.
UM03001_emWin5.pdf
emWin user guide and reference manual.
2.4 Include Files (ThirdParty\emWin\Include)
This directory contains header files for emWin project.
2.5 Library (ThirdParty\emWin\Lib)
NUemWin_CM4_Keil.lib
emWin library for M480 series MCU.

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2.6 Tools (ThirdParty\emWin\Tool)
BmpCvtNuvoton.exe
The Bitmap Converter is designed for converting common image
file formats like BMP, PNG or GIF into the desired emWin bitmap
format.
emWinPlayer.exe
This tool can show the previously created emWin Movie File (EMF)
on a Computer with a Windows operating system.
GUIBuilder.exe
A tool for creating dialogs by drag and drop operation.
JPEG2Movie.exe
A tool to convert JPEG files to an EMF file.

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3 emWin Sample Code
There are two emWin sample code in the M480 BSP SampleCode directory:
emWin_GUIDemo: utilizes the emWin library to demonstrate widgets feature;
emWin_SimpleDemo: utilizes the emWin library to demonstrate interactive feature.
3.1 Project Structure
The following uses emWin_SimpleDemo as a sample to explain the emWin project structure
in BSP. This sample contains a frame window, four buttons, a text and a text editor. User can
update the number shown in the text field by clicking four buttons shown on the display panel.

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The project structure is shown in the following figure. The project contains two targets:
emWin_SimpleDemo: stores touch screen calibration parameters in APROM;
emWin_SimpleDemo_SD:stores touch screen calibration parameters in a SD card.
The Libraries group contains low level driver and system startup code. The emWin group
contains emWin library and panel configuration for the NuMicro®family. The Application group
contains the C code generated by emWin GUIBuilder. The tslib group is the touch screen
library. The FatFs group contains the file system library to access the SD card. The src group
contains the main file.
3.2 System Initialization
The system initialization code is located in main function, including peripheral clock
preparation, multi- function pin configuration, and UART debug port setting. Also, a 1000Hz
timer is configured to keep track of time elapsed.
int main(void)
{

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// Init System, IP clock and multi-function I/O
_SYS_Init();
//
// Init UART to 115200-8n1 for print message
//
UART_Open(UART0, 115200);
// Enable Timer0 clock and select Timer0 clock source
//
CLK_EnableModuleClock(TMR0_MODULE);
CLK_SetModuleClock(TMR0_MODULE, CLK_CLKSEL1_TMR0SEL_HXT, 0);
//
// Initial Timer0 to periodic mode with 1000Hz
//
TIMER_Open(TIMER0, TIMER_PERIODIC_MODE, 1000);
//
// Enable Timer0 interrupt
//
TIMER_EnableInt(TIMER0);
NVIC_EnableIRQ(TMR0_IRQn);
//
// Start Timer0
//
TIMER_Start(TIMER0);
printf("\n\nCPU @ %d Hz\n", SystemCoreClock);
MainTask();
while(1);
}
3.3 emWin Initialization
To initialize emWin GUI, the application needs to call GUI_Init() and CreatFramewin()
function. The code is in MainTask() in main.c.
void MainTask(void)
{
WM_HWIN hWin;
Char acVersion[40] = "Framewin: Version of emWin: ";

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printf("Main Task -> \n");
GUI_Init();
strcat(acVersion, GUI_GetVersionString());
hWin = CreateFramewin();
FRAMEWIN_SetText(hWin, acVersion);
while (1)
{
GUI_Delay(500);
}
}
3.4 Build emWin Project
To build the emWin project in Keil MDK, click the rebuild icon as shown below or press F7
function key.
3.5 Download and Run
Press Ctrl + F5 to download the application and start a debug session or click start/stop
debug session icon as shown below.
After entering debug session, press F5 to start code execution.

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The following figure shows the application halts in main() function after starting a debug
session.
3.6 Touch Screen
To support resistive touch screen, use ADC to convert the voltage of X axis and Y axis, and
then use the open source tslib to map the ADC conversion result into the coordination. The
conversion result can be affected by power noise, mechanical misalignment, etc. To
overcome this issue, the tslib supports calibration function, and the calibration parameter is
stored ether in APROM or a SD card.
As mentioned in section 3.1, there are two targets in this project: emWin_SimpleDemo uses
the calibration parameter in the APROM offset 0x00040000, and emWin_SimpleDemo_SD
uses the calibration parameter results in a SD card called ts_calib. User can switch between
different targets using the pull down menu marked in the red rectangle shown below.

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In the emWin_SimpleDemo_SD, a preprocessor symbol __USE_SD__ is defined to build the
sample and use a SD card to store the calibration parameter as shown below.
The touch resolution and the APROM offset store calibration parameters in the
M48XTouchPanel.h.
#ifndef __M48XTOUCHPANEL_H__
#define __M48XTOUCHPANEL_H__
#define __DEMO_TSFILE_ADDR__ 0x00040000 /* APROM offset */
#define __DEMO_TS_WIDTH__ 320
#define __DEMO_TS_HEIGHT__ 240
#endif
If APROM is used to store the calibration parameter, main function will load the parameter
from APROM. If the parameter doesn’t exist, main function will call ts_calibrate() to generate
a copy.
/* Unlock protected registers */
SYS_UnlockReg();
/* Enable FMC ISP function */
FMC_Open();
/* If calibration parameter exists, call ts_calibrate to generate a copy */
if (FMC_Read(__DEMO_TSFILE_ADDR__ + 0x1C) != 0x55AAA55A)
{
FMC_ENABLE_AP_UPDATE();
ts_calibrate(__DEMO_TS_WIDTH__, __DEMO_TS_HEIGHT__);
// Erase page
FMC_Erase(__DEMO_TSFILE_ADDR__);
ts_writefile();
FMC_DISABLE_AP_UPDATE();
}
else
{

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ts_readfile();
}
/* Disable FMC ISP function */
FMC_Close();
/* Lock protected registers */
SYS_LockReg();
If a SD card is used to store calibration parameters, main function will load the parameter file
ts_calib from the SD card root directory. If the parameter doesn’t exist, main function will call
ts_calibrate() to generate a copy. This sample uses FatFS to access FAT file system.
SDH_Open_Disk(TEST_SDH, CardDetect_From_GPIO);
printf("rc=%d\n", (WORD)disk_initialize(0));
disk_read(0, Buff, 2, 1);
GUI_Init();
res = f_open(&hFile, "0:\\ts_calib", FA_OPEN_EXISTING | FA_READ);
if (res)
{
// file does not exists, so do calibration
res = f_open(&hFile, "0:\\ts_calib", FA_CREATE_ALWAYS | FA_WRITE);
if ( res )
{
f_close(&hFile);
GUI_DispStringAt("CANNOT create the calibration file.\nPlease insert a SD card
then reboot.", 0, 0);
while(1);
}
ts_calibrate(__DEMO_TS_WIDTH__, __DEMO_TS_HEIGHT__);
ts_writefile();
}
else
{
ts_readfile();
}
f_close(&hFile);

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4 emWin GUIBuilder
4.1 Create Widget
Segger provides a Windows tool GUIBuilder to create application with drag and drop
interface. The tool is located under the ThirdParty\emWin\Tool\ directory. This tool can
generate a file named FramewinDLG.c for the widget of target application. Please refer to
chapter 20 of UM03001_emWin5.pdf for the usage of GUIBuilder.
4.2 Handle Widget Event
FramewinDLG.c is only the framework of widget and programmers still need to add their
desired widget event handler in this file after copying the FramewinDLG.c file into the project
directory. Below is the event handling code of emWin_SimpleDemo.
......
switch (pMsg->MsgId)
{
case WM_INIT_DIALOG:
//
// Initialization of 'Edit'
//
value = 123;

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sprintf(sBuf,"%d ", value);
hItem = WM_GetDialogItem(pMsg->hWin, ID_EDIT_0);
EDIT_SetText(hItem, sBuf);
// USER START (Optionally insert additional code for further widget initialization)
// USER END
break;
case WM_NOTIFY_PARENT:
Id = WM_GetId(pMsg->hWinSrc);
NCode = pMsg->Data.v;
switch(Id)
{
case ID_BUTTON_0: // Notifications sent by '+ 1'
switch(NCode)
{
case WM_NOTIFICATION_CLICKED:
// USER START (Optionally insert code for reacting on notification message)
// USER END
value += 1;
sprintf(sBuf,"%d ", value);
hItem = WM_GetDialogItem(pMsg->hWin, ID_EDIT_0);
EDIT_SetText(hItem, sBuf);
break;
case WM_NOTIFICATION_RELEASED:
// USER START (Optionally insert code for reacting on notification message)
// USER END
break;
// USER START (Optionally insert additional code for further notification
handling)
// USER END
break;
......

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5 Change Display Panel
5.1 emWin Display Configuration
emWin declares its display panel resolution in LCDConf.c under the
ThirdParty\emWin\Config\ directory. The resolution is different from the touch panel resolution
defined in the M48XTouchPanel.h. This is because the panel is a portrait display and data is
swapped before output for a landscape view by LCD driver IC.
......
// Physical display size
#define XSIZE_PHYS 240
#define YSIZE_PHYS 320
In the LCDConf.c file, the panel orientation and control functions are also defined. These
settings need to be modified according to the display panel attached to the system.
......
void LCD_WR_REG(uint8_t cmd)
{
EBI0_WRITE_DATA16(0x00030000, cmd);
}
......
uint8_t LCD_RD_DATA(void)
{
return EBI0_READ_DATA16(0x00030000);
}
void LCD_X_Config(void)
{
......
// Orientation
Config.Orientation = GUI_MIRROR_X | GUI_MIRROR_Y | GUI_SWAP_XY;
GUIDRV_FlexColor_Config(pDevice, &Config);
// Set controller and operation mode
PortAPI.pfWrite16_A0 = LCD_WR_REG;
PortAPI.pfWrite16_A1 = LCD_WR_DATA;
PortAPI.pfWriteM16_A1 = LcdWriteDataMultiple;
PortAPI.pfReadM16_A1 = LcdReadDataMultiple;
GUIDRV_FlexColor_SetFunc(pDevice,
&PortAPI,
GUIDRV_FLEXCOLOR_F66709,

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GUIDRV_FLEXCOLOR_M16C0B16);
......
5.2 Display Driver
The project file includes the ebi.c driver since demo system is connected to a MPU display
using the EBI interface. For systems connecting display with the SPI or I2C interface, spi.c or
i2c.c needs to be added to the project.

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Revision History
Date
Revision
Description
2018.10.04
1.00
1. Initially issued.

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Important Notice
Nuvoton Products are neither intended nor warranted for usage in systems or equipment, any
malfunction or failure of which may cause loss of human life, bodily injury or severe property damage.
Such applications are deemed, “Insecure Usage”.
Insecure usage includes, but is not limited to: equipment for surgical implementation, atomic energy
control instruments, airplane or spaceship instruments, the control or operation of dynamic, brake or
safety systems designed for vehicular use, traffic signal instruments, all types of safety devices, and
other applications intended to support or sustain life.
All Insecure Usage shall be made at customer’s risk, and in the event that third parties lay claims to
Nuvoton as a result of customer’s Insecure Usage, customer shall indemnify the damages and liabilities
thus incurred by Nuvoton.