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Add external sensor example

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This commit is contained in:
lewishe 2023-06-30 09:42:22 +08:00
parent 6e172271b6
commit 897c239188
2 changed files with 159 additions and 0 deletions
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58
example/I2CScan/I2CScan.ino Normal file
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/**
* @file I2CScan.ino
* @author Lewis He (lewishe@outlook.com)
* @license MIT
* @copyright Copyright (c) 2023 Shenzhen Xin Yuan Electronic Technology Co., Ltd
* @date 2023-06-30
*
*/
#include <Arduino.h>
#include <Wire.h>
void deviceScan(TwoWire *_port, Stream *stream)
{
uint8_t err, addr;
int nDevices = 0;
for (addr = 1; addr < 127; addr++) {
_port->beginTransmission(addr);
err = _port->endTransmission();
if (err == 0) {
stream->print("I2C device found at address 0x");
if (addr < 16)
stream->print("0");
stream->print(addr, HEX);
stream->println(" !");
nDevices++;
} else if (err == 4) {
stream->print("Unknow error at address 0x");
if (addr < 16)
stream->print("0");
stream->println(addr, HEX);
}
}
if (nDevices == 0)
stream->println("No I2C devices found\n");
else
stream->println("Done\n");
}
int sda = 18;
int scl = 17;
#define PIN_POWER_ON 15
void setup()
{
pinMode(PIN_POWER_ON, OUTPUT);
digitalWrite(PIN_POWER_ON, HIGH);
Serial.begin(115200);
Wire.begin(sda, scl);
}
void loop()
{
deviceScan(&Wire, &Serial);
delay(1000);
}

101
example/MPR121TouchSensor/MPR121TouchSensor.ino Normal file
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/**
* @file MPR121.ino
* @author Lewis He (lewishe@outlook.com)
* @license MIT
* @copyright Copyright (c) 2023 Shenzhen Xin Yuan Electronic Technology Co., Ltd
* @date 2023-06-30
* @note MPR121 is an external access sensor, not included in T-Display S3
*/
#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_MPR121.h>
Adafruit_MPR121 cap1 = Adafruit_MPR121();
Adafruit_MPR121 cap2 = Adafruit_MPR121();
void deviceScan(TwoWire *_port, Stream *stream)
{
uint8_t err, addr;
int nDevices = 0;
for (addr = 1; addr < 127; addr++) {
_port->beginTransmission(addr);
err = _port->endTransmission();
if (err == 0) {
stream->print("I2C device found at address 0x");
if (addr < 16)
stream->print("0");
stream->print(addr, HEX);
stream->println(" !");
nDevices++;
} else if (err == 4) {
stream->print("Unknow error at address 0x");
if (addr < 16)
stream->print("0");
stream->println(addr, HEX);
}
}
if (nDevices == 0)
stream->println("No I2C devices found\n");
else
stream->println("Done\n");
}
int sda = 18;
int scl = 17;
#define PIN_POWER_ON 15
void setup()
{
pinMode(PIN_POWER_ON, OUTPUT);
digitalWrite(PIN_POWER_ON, HIGH);
Serial.begin(115200);
Wire.begin(sda, scl);
deviceScan(&Wire, &Serial);
if (!cap1.begin(0x5A)) {
Serial.println("MPR121 not found, check wiring?");
while (1);
}
Serial.println("MPR121 found!");
if (!cap2.begin(0x5B)) {
Serial.println("MPR121 not found, check wiring?");
while (1);
}
Serial.println("MPR121 found!");
}
bool getTouch(Adafruit_MPR121 &cap, uint8_t index)
{
uint16_t lasttouched[2] = {0};
uint16_t currtouched[2] = {0};
// Get the currently touched pads
currtouched[index] = cap.touched();
for (uint8_t i = 0; i < 12; i++) {
// it if *is* touched and *wasnt* touched before, alert!
if ((currtouched[index] & _BV(i)) && !(lasttouched[index] & _BV(i)) ) {
Serial.print("Cap"); Serial.print(index); Serial.print(" -> ");
Serial.print(i); Serial.println(" touched");
}
// if it *was* touched and now *isnt*, alert!
if (!(currtouched[index] & _BV(i)) && (lasttouched[index] & _BV(i)) ) {
Serial.print("Cap"); Serial.print(index); Serial.print(" -> ");
Serial.print(i); Serial.println(" released");
}
}
// reset our state
lasttouched[index] = currtouched[index];
return true;
}
void loop()
{
getTouch(cap1, 0);
getTouch(cap2, 1);
delay(1);
}