Mikroelektronika d.o.o.
Tableau de clic 4D-Display
Tableau de clic 4D-Display
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Le 4D - Display Click Board™ est un adaptateur Click Board™ qui offre une interface mikroBUS pour contrôler les modules d'affichage intelligents de la série gen4 de 4D Systems. 4D Systems conçoit et fabrique une large gamme de modules d'affichage intelligents équipés de puissants processeurs graphiques. Leurs écrans permettent de contrôler des objets graphiques en échangeant des messages spécifiquement formatés avec le microcontrôleur externe (MCU) via l'UART.
En utilisant le 4D - Display Click Board™ , il est possible de développer une application de micrologiciel MCU capable d'interagir avec les objets graphiques du module d'affichage intelligent 4D via le mikroBUS. Cela simplifie considérablement la conception de l'application, tout en réduisant la charge de traitement sur le MCU hôte, ce qui permet de créer des applications graphiques étonnantes, même avec des MCU 8 bits plus lents.
The 4D-Display Click Board™ offers a high quality 30-pin ZIF FFC connector for display connection, as well as a 2-pole SMD terminal block for connecting an external power supply, for cases when the connected display demands more power than the mikroBUS™ is able to provide. A small SMD jumper is used to select the external power supply source in this case. This Click board™ offers a reliable and fast UART connection between the 4D intelligent display and the development system, allowing any system equipped with the mikroBUS™ to harness the graphical power of the 4D intelligent display.
How Does The 4D-Display Click Board™ Work?
The 4D-Display Click Board™ is an adapter, used to interface gen4 intelligent display modules produced by, with the MCU systems equipped with the mikroBUS™ socket. The Click board™ is equipped with a high quality 30-pin ZIF FFC connector, which allows reliable and secure connection with the intelligent display module. The gen4 intelligent display modules are equipped with the powerful DIABLO 16 graphic processors from 4D Labs, which are used to accelerate graphic processing. The gen4 display module product family offers ZIF FFC connection interface, so these displays can be used with 4D - display click. By utilizing the proprietary software IDE called, it is possible to build accelerated graphic objects on these displays, each with its unique ID, type and value. This information can be exchanged with the smart display module over the UART. This is where the 4D-Display Click Board™ adapter comes in handy: by connecting the previously programmed intelligent display module to this Click board™, an interaction between the MCU running a custom firmware and the display itself is made possible.
For example, it is possible to read the ambient light data provided by the UV 4 click installed in the mikroBUS™ socket 2, while showing it on a gauge displayed at the screen of the intelligent display module, connected to the 4D - display click on the mikroBUS™ socket 1. By transmitting the UART data that contains the unique ID of the gauge object and the light intensity reading in the place of the value parameter, the intelligent display will automatically move the gauge scale to show the new updated value. Communication in the other direction is possible, too: touching a pre-programmed button can perform an action on the host MCU, which will receive the UART message from the smart display, containing the unique ID of the button object and its pressed state.
Besides the UART RX and TX lines, the RST pin is also routed to the ZIF FFC connector. This pin allows the host controller to reset the display if necessary. The Click board™ also contains a 2-pole SMD terminal block, which is used to connect an external power supply, if required by some of the more power-demanding displays. In this case, the small SMD jumper labelled as the PWR SEL should be moved to the EXT position. This will redirect the display module to use the externally connected power supply. The SMD terminal block allows AWG wire sizes between 18 to 24 to be used. It is very simple to use and establishes a reliable connection
More information about 4D intelligent display modules and the software IDE used to program them, can be found on the official site of the.
SPECIFICATIONS
PINOUT DIAGRAM
This table shows how the pinout of the 4D-Display Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin | Pin | Notes | ||||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | NC | ||
| Reset | RST | 2 | RST | INT | 15 | NC | |
| NC | 3 | CS | RX | 14 | TX | UART TX | |
| NC | 4 | SCK | TX | 13 | RX | UART RX | |
| NC | 5 | MISO | SCL | 12 | NC | ||
| NC | 6 | MOSI | SDA | 11 | NC | ||
| NC | 7 | 3.3V | 5V | 10 | 5V | Power supply | |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description | |
|---|---|---|---|---|
| PWR | PWR | - | Power LED indicator | |
| PWR SEL | PWR SEL | Right | Power supply source selection: left position external power supply, right position 5V mikroBUS™ power rail | |
ONBOARD CONNECTORS
| Label | Name | Description |
|---|---|---|
| TB 1 | VIN, GND | External power supply input terminal |
| CN 1 | CN 1 | ZIF FFC for smart display connection |
Software Support
We provide a demo application for the 4D-Display Click Board™ on our, as well as a demo application (example), developed using MikroElektronika. The demo can run on all the main MikroElektronika.
Library Description
The library performs the control of the 4D Systems LCD displays via the UART interface by sending the determined commands. The commands can read the objects and write the desired value to the objects, also they support sending the report from the device to the host. Before we start to use this library, first we must perform the LCD display programming. The UART baud rate on LCD and UART baud rate on the host device must be the same. The user can use our demo application for the 4D Systems LCD display, which simulates the speed measurement. For more details check the documentation.
Key functions
void c4d_writeObj( T_C4D_OBJ_P obj )- Function writes the desired value to the desired object.void c4d_readObj( T_C4D_OBJ_P obj )- Function reads the value of the desired object.uint8_t c4d_sendCommand( uint8_t _command, uint8_t *dataIn, uint8_t nBytes )- Function sends a command to the display.
Example Description
The application is composed of three sections:
- System Initialization - Initializes peripherals and pins.
- Application Initialization - Initializes UART driver, configures timer and puts all objects on the display to the inactive state (initializes display). Also waits about 5 seconds to stabilize the display.
- Application Task - (code snippet) - Performs the display control. The application represents speed measurement. First checks if the start button is enabled, and when is it true, reads the value of the slider object and represents that value to the other objects. The slider value is controlled by the timer. The user should put the Start switch to the active state (start the application) when Ready LED becomes green. Note: Before you start using this code, first you must perform the display programming by using the workshop application. The display programming will define all objects and show your desired objects on the display. Also, the microSD card is necessary when you start the display programming and must be formatted as FAT16. When programming is finished put the microSD card on the display device and then you can start to use this example,
to control all objects on the display.
void applicationTask()
{
c4d_readObj( (T_C4D_OBJ_P)&dipswitch0 );
if (dipswitch0.objValue != _C4D_INACTIVE_STATE)
{
if (enCheck == _C4D_INACTIVE_STATE)
{
led0.objValue = _C4D_ACTIVE_STATE;
c4d_writeObj( (T_C4D_OBJ_P)&led0 );
enCheck = _C4D_ACTIVE_STATE;
TIM2_CR1.CEN = _C4D_ACTIVE_STATE;
}
if (slider0.objValue != prevState)
{
leddigits0.objValue = slider0.objValue * 10;
coolgauge0.objValue = slider0.objValue;
if (slider0.objValue != _C4D_INACTIVE_STATE)
{
userled2.objValue = _C4D_ACTIVE_STATE;
}
else
{
userled2.objValue = _C4D_INACTIVE_STATE;
}
if (slider0.objValue >= 100)
{
userled1.objValue = _C4D_ACTIVE_STATE;
}
else
{
userled1.objValue = _C4D_INACTIVE_STATE;
}
if (slider0.objValue >= 200)
{
userled0.objValue = _C4D_ACTIVE_STATE;
}
else
{
userled0.objValue = _C4D_INACTIVE_STATE;
}
c4d_writeObj( (T_C4D_OBJ_P)&slider0 );
c4d_writeObj( (T_C4D_OBJ_P)&leddigits0 );
c4d_writeObj( (T_C4D_OBJ_P)&coolgauge0 );
c4d_writeObj( (T_C4D_OBJ_P)&userled0 );
c4d_writeObj( (T_C4D_OBJ_P)&userled1 );
c4d_writeObj( (T_C4D_OBJ_P)&userled2 );
prevState = slider0.objValue;
}
}
else if (enCheck == _C4D_ACTIVE_STATE)
{
TIM2_CR1.CEN = _C4D_INACTIVE_STATE;
slider0.objValue = _C4D_INACTIVE_STATE;
leddigits0.objValue = _C4D_INACTIVE_STATE;
coolgauge0.objValue = _C4D_INACTIVE_STATE;
userled0.objValue = _C4D_INACTIVE_STATE;
userled1.objValue = _C4D_INACTIVE_STATE;
userled2.objValue = _C4D_INACTIVE_STATE;
led0.objValue = _C4D_INACTIVE_STATE;
prevState = slider0.objValue;
enCheck = _C4D_INACTIVE_STATE;
transmission1 = _C4D_INACTIVE_STATE;
transmission2 = _C4D_INACTIVE_STATE;
transmission3 = _C4D_INACTIVE_STATE;
c4d_writeObj( (T_C4D_OBJ_P)&slider0 );
c4d_writeObj( (T_C4D_OBJ_P)&leddigits0 );
c4d_writeObj( (T_C4D_OBJ_P)&coolgauge0 );
c4d_writeObj( (T_C4D_OBJ_P)&userled0 );
c4d_writeObj( (T_C4D_OBJ_P)&userled1 );
c4d_writeObj( (T_C4D_OBJ_P)&userled2 );
c4d_writeObj( (T_C4D_OBJ_P)&led0 );
}
}
Additional Functions :
- Timer interrupt function is used to control the slider object value and in that way, we simulate the speed changing.
The full application code, and ready to use projects can be found on ours.
Other MikroElektronika libraries used in the example:
- UART
ADDITIONAL NOTES AND INFORMATION
Depending on the development board you are using, you may need an USB UART Click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika, or any other terminal application of your choice, can be used to read the message.
MIKROSDK
The 4D-Display Click Board™ is supported with- MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant click board demo applications, mikroSDK should be downloaded from and installed for the compiler you are using.
Tableau de clic 4D-Display
Frequently Asked Questions
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