This is Arduino sample code for the CFAF320480C7-035Tx family of displays. These displays are 3.5" TFTs which use the Ilitek ILI9488 LCD controller. This LCD controller is capable of 8/9/16/18 bit parallel, 3 or 4-Wire SPI and DOTCLK RGB with SPI initialization. In order to interface with the displays, a 50 pin ZIF to header breakout board will be required.
// LCD parallel 8080 pins and control lines on Seeeduino:
// ARD | Port | Display pin | Function - 8080 Parallel |
//-----------+-------+-------------+------------------------------------------+
// 3.3V/5V | | | POWER 3.3V |
// GND | | | GROUND |
//-----------+-------+-------------+------------------------------------------+
// D8 | PORTB | 38 | Chip enable signal (CS) |
// D9 | PORTB | 09 | Reset (Reset) |
// D10 | PORTB | 37 | Data/Command (DC) |
// D11 | PORTB | 36 | Write (WR) |
// D12 | PORTB | 35 | Read (RD) |
//-----------+-------+-------------+------------------------------------------+
// Data Lines
//-----------+-------+-------------+------------------------------------------+
// D0 | PORTD | 31 | DATA BUS LINE (DB0) |
// D1 | PORTD | 30 | DATA BUS LINE (DB1) |
// D2 | PORTD | 29 | DATA BUS LINE (DB2) |
// D3 | PORTD | 28 | DATA BUS LINE (DB3) |
// D4 | PORTD | 27 | DATA BUS LINE (DB4) |
// D5 | PORTD | 26 | DATA BUS LINE (DB5) |
// D6 | PORTD | 25 | DATA BUS LINE (DB6) |
// D7 | PORTD | 24 | DATA BUS LINE (DB7) |
//-----------+-------+-------------+------------------------------------------+
//==============================================================================
// LCD SPI pins and control lines on Seeeduino:
// ARD | Port | Display pin | Function - SPI |
//-----------+-------+-------------+------------------------------------------+
// 3.3V/5V | | | POWER 3.3V |
// GND | | | GROUND |
//-----------+-------+-------------+------------------------------------------+
// D8 | PORTB | 37 | Data/Command (DC) |
// D9 | PORTB | 09 | Reset (Reset) |
// D10 | PORTB | 38 | Chip select (CS) |
// D11 | PORTB | 34 | SPI data input (SDA) |
// D13 | PORTB | 36 | Serial clock (SCK) |
//-----------+-------+-------------+------------------------------------------+
//==============================================================================
// Interface Selection
// IM2 | IM1 | IM0 | Interface mode |
//-----+-----+-----+------------------+
// 0 | 1 | 1 | 8-bit parallel |
// 1 | 1 | 1 | 4-wire SPI |
//-----+-----+-----+------------------+
//==============================================================================
// Resistive touchscreen connection (SPI only)
// ARD | Port | Touchscreen pin | Function |
//-----------+-------+-----------------+---------------- ---------------------+
// D16 | PORTC | XL | Touch panel left (XL) |
// D17 | PORTC | XR | Touch panel right (XR) |
// D18 | PORTC | YD | Touch panel bottom (YD) |
// D19 | PORTC | YU | Touch panel top (YU) |
//-----------+-------+-----------------+---------------- ---------------------+
// Capacitive touchscreen connection (SPI only)
// ARD | Port | Touchscreen pin | Function |
//-----------+-------+-----------------+---------------- ---------------------+
// 3.3V | | 3.3V | POWER 3.3V |
// GND | | GND | GROUND |
//-----------+-------+-----------------+---------------- ---------------------+
// D0 | PORTD | RST | Reset (Reset) |
// D17 | PORTC | INT | Interrupt (INT) |
// D18 | PORTC | SDA | Serial data (SDA) |
// D19 | PORTC | SCK | Serial clock (SCL) |
//-----------+-------+-----------------+---------------- ---------------------+
//==============================================================================
// SD card connection (using CFA10112)
// ARD | Port | Adapter pin | Function |
//-----------+-------+-------------+------------------------------------------+
// 3.3V | | 3.3V | POWER 3.3V |
// GND | | GND | GROUND |
//-----------+-------+-------------+------------------------------------------+
// D11 | PORTB | DI | Serial data in (DI) |
// D12 | PORTB | DO | Serial data out (DO) |
// D13 | PORTB | SCK | Serial clock (SCK) |
// D14 | PORTC | CS | Chip select (CS) |
//-----------+-------+-------------+------------------------------------------+
Here are links to our active displays:
CFAF320480C7-035TR
CFAF320480C7-035TN
CFAF320480C7-035TC
For more information about other TFT offerings, please see our full list here.
We make our best efforts to ensure that all replacement displays are "drop-in" replacements, however, this may not always be possible/feasible due to the End-Of-Life (EOL) of components and various other factors. The Himax HX8357-B LCD controller has gone EOL and its replacement controller, the ILITEK ILI9488 has some key differences that affect the initialization sequence of the display when migrating between the two parts. The affected commands during the display initialization are outlined below. It is recommended to follow the initialization sequence used in our sample code when migrating.
// Command | HX8357-B | ILI9488 | Notes |
//---------+-------------------------+---------------------------+-----------------------------------------------------+
// D0h | Set power | NV memory write | The ILI9488 power commands are C0h and C1h |
// D1h | Set VCOM | NV memory protection key | The ILI9488 VCOM command is C5h |
// D2h | Set power for normal mode | NV memory status read | The ILI9488 normal mode power command is C2h |
// C0h | Set panel driving | Power control 1 | The ILI9488 display function control command is B6h |
// C5h | Set display frame | VCOM control | The ILI9488 frame rate control command is b1h |
// E9h | Set panel related | Set image function | |
// C8h | Set gamma | CABC control 2 | The ILI9488 gamma commands are E0h and E1h |
// 3Ah | Set pixel format | Interface pixel format | 3bits/pixel functionality is removed in the ILI9488 |
// B4h | Set display mode | Display inversion control | The ILI9488 display function control command is B6h |
//-----------+-------+-------------+-------------------------------------------------------------------------------------+