Detect FT6336U Capacitive Touch Screen on Raspberry Pi Pico using Arduino-FT6336U library.
This video show reading FT6336U Capacitive Touch Screen using Arduino-FT6336U
library. (Run on
Raspberry Pi Pico/3.2" 240x320 IPS SPI ILI9341 with Capacitive Touch)
For the display part, refer to the post Raspberry Pi Pico (RP2040) + 3.2inch IPS SPI Module ILI9341 (Arduino
Framework using Adafruit_ILI9341 library).
To install Arduino-FT6336U for touch part, visit https://github.com/aselectroworks/Arduino-FT6336U, download code in ZIP form. For steps, read this video.
Connection
ILI9341 Module Raspberry Pi Pico
1 VCC 3V3
2 GND GND
3 LCD_CS GP17
4 LCD_RST GP21
5 LCD_RS GP20
6 SDI(MOSI) GP19
7 SCK GP18
8 LED 3V3
9 SDO(MISO) GP16
10 CTP_SCL GP5
11 CTP_RST GP3
12 CTP_SDA GP4
13 CTP_INT GP2
14 SD_CS GP15
pico_ReadTouchParam_FT6336U.ino, modified from ReadTouchParam to display touch event.
/*
Exercise to read FT6336U Capacitive Touch Screen.
Run on Raspberry Pi Pico
+ 3.2 inch 320x240 IPS SPI Module ILI9341 with FT6336U Capacitive Touch Screen,
using Arduino-FT6336U (https://github.com/aselectroworks/Arduino-FT6336U).
Basically modified from Example FT6336U CTP Controller (Arduino-FT6336U) > ReadTouchParam
*/
#include "FT6336U.h"
/*
Hardware I2C pins for Raspberry Pi Pico
I2C_SDA = 4
I2C_SCL = 5
CTP_SCL = GP5
CTP_RST = GP3
CTP_SDA = GP4
CTP_INT = GP2
*/
#define RST_N_PIN 3
#define INT_N_PIN 2
//FT6336U ft6336u(I2C_SDA, I2C_SCL, RST_N_PIN, INT_N_PIN);
FT6336U ft6336u(RST_N_PIN, INT_N_PIN);
void setup() {
delay(500);
Serial.begin(115200);
delay(1000);
Serial.println("I2C_SDA:\t" + String(I2C_SDA));
Serial.println("I2C_SCL:\t" + String(I2C_SCL));
Serial.println("RST_N_PIN:\t" + String(RST_N_PIN));
Serial.println("INT_N_PIN:\t" + String(INT_N_PIN));
Serial.println();
ft6336u.begin();
Serial.print("FT6336U Firmware Version: ");
Serial.println(ft6336u.read_firmware_id());
Serial.print("FT6336U Device Mode: ");
Serial.println(ft6336u.read_device_mode());
}
void loop() {
delay(1000);
if(digitalRead(INT_N_PIN) != -1) {
// TD_STATUS 0x02
// Number of touch points [3:0]
// The detected point number, 1-2 is valid.
// Serial.print("FT6336U TD Status: ");
// Serial.println(ft6336u.read_td_status());
uint8_t touch1_event = ft6336u.read_touch1_event();
// Serial.println(touch1_event);
switch(touch1_event){
case 0x00:
Serial.print("Press Down");
Serial.print(" ("); Serial.print(ft6336u.read_touch1_x()); Serial.print(" , "); Serial.print(ft6336u.read_touch1_y()); Serial.print(")");
break;
case 0x01:
Serial.print("Lift Up");
break;
case 0x02:
Serial.print("Contact");
Serial.print(" ("); Serial.print(ft6336u.read_touch1_x()); Serial.print(" , "); Serial.print(ft6336u.read_touch1_y()); Serial.print(")");
break;
case 0x03:
Serial.print("No event");
break;
}
Serial.println();
/*
Serial.print("FT6336U Touch Event/ID 1: (");
Serial.print(ft6336u.read_touch1_event()); Serial.print(" / "); Serial.print(ft6336u.read_touch1_id()); Serial.println(")");
Serial.print("FT6336U Touch Position 1: (");
Serial.print(ft6336u.read_touch1_x()); Serial.print(" , "); Serial.print(ft6336u.read_touch1_y()); Serial.println(")");
Serial.print("FT6336U Touch Weight/MISC 1: (");
Serial.print(ft6336u.read_touch1_weight()); Serial.print(" / "); Serial.print(ft6336u.read_touch1_misc()); Serial.println(")");
Serial.print("FT6336U Touch Event/ID 2: (");
Serial.print(ft6336u.read_touch2_event()); Serial.print(" / "); Serial.print(ft6336u.read_touch2_id()); Serial.println(")");
Serial.print("FT6336U Touch Position 2: (");
Serial.print(ft6336u.read_touch2_x()); Serial.print(" , "); Serial.print(ft6336u.read_touch2_y()); Serial.println(")");
Serial.print("FT6336U Touch Weight/MISC 2: (");
Serial.print(ft6336u.read_touch2_weight()); Serial.print(" / "); Serial.print(ft6336u.read_touch2_misc()); Serial.println(")");
*/
}else{
Serial.println("INT_N_PIN == -1");
}
}
pico_ILI9341_FT6336U.ino, Read Touch event and display on screen.
/*
Exercidr run on Raspberry Pi Pico
+ 3.2 inch 320x240 IPS SPI Module ILI9341 with FT6336U Capacitive Touch Screen,
using Adafruit_ILI9341 and Arduino-FT6336U (https://github.com/aselectroworks/Arduino-FT6336U).
Read Touch event and display on screen.
Sometimes miss touch events, depends on sampling rate.
*/
#include <Adafruit_ILI9341.h>
#include <FT6336U.h>
/*
Hardware I2C pins for Raspberry Pi Pico
I2C_SDA = 4
I2C_SCL = 5
Hardware SPI pins for Raspberry Pi Pico
SPI_MOSI = 19
SPI_MISO = 16
SPI_SCK = 18
ILI9341 Module Raspberry Pi Pico
1 VCC 3V3
2 GND GND
3 LCD_CS GP17
4 LCD_RST GP21
5 LCD_RS GP20
6 SDI(MOSI) GP19
7 SCK GP18
8 LED 3V3
9 SDO(MISO) GP16
10 CTP_SCL GP5
11 CTP_RST GP3
12 CTP_SDA GP4
13 CTP_INT GP2
14 SD_CS GP15
*/
#define TFT_DC 20
#define TFT_CS 17
#define TFT_RST 21
#define RST_N_PIN 3
#define INT_N_PIN 2
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
FT6336U ft6336u(RST_N_PIN, INT_N_PIN);
void setup() {
delay(500);
Serial.begin(115200);
delay(1000);
Serial.println();
tft.begin(); // Initialize screen
tft.invertDisplay(true);
tft.fillScreen(ILI9341_BLACK);
ft6336u.begin();
Serial.print("FT6336U Firmware Version: ");
Serial.println(ft6336u.read_firmware_id());
Serial.print("FT6336U Device Mode: ");
Serial.println(ft6336u.read_device_mode());
}
void loop() {
if(digitalRead(INT_N_PIN) != -1) {
switch(ft6336u.read_touch1_event()){
case 0x00:
tft.fillScreen(ILI9341_BLACK);
break;
case 0x02:
tft.fillCircle(ft6336u.read_touch1_x(), ft6336u.read_touch1_y(), 3, ILI9341_WHITE);
break;
}
}
}
Related:
~ Control 3.2" 240x320h IPS SPI Module ILI9341 with cap. touch FT6336U on Nologo Nano 33 BLE (Arduino Framework)
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