Diff: Adafruit_MPR121.h

Revision:

2:d9745be6c253

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+++ b/Adafruit_MPR121.h	Thu Aug 04 15:14:29 2022 -0400
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+/*!
+ *  @file Adafruit_MPR121.h
+ *
+ *  This is a library for the MPR121 12-Channel Capacitive Sensor
+ *
+ *  Designed specifically to work with the MPR121 board.
+ *
+ *  Pick one up today in the adafruit shop!
+ *  ------> https://www.adafruit.com/product/1982
+ *
+ *  These sensors use I2C to communicate, 2+ pins are required to interface
+ *
+ *  Adafruit invests time and resources providing this open source code,
+ *  please support Adafruit andopen-source hardware by purchasing products
+ *  from Adafruit!
+ *
+ *  Limor Fried/Ladyada (Adafruit Industries).
+ *
+ *  BSD license, all text above must be included in any redistribution
+ */
+
+#ifndef ADAFRUIT_MPR121_H
+#define ADAFRUIT_MPR121_H
+
+#include <cstdint>
+#include <mbed.h>
+
+// The default I2C address
+#define MPR121_I2CADDR_DEFAULT 0x5A        ///< default I2C address
+#define MPR121_TOUCH_THRESHOLD_DEFAULT 12  ///< default touch threshold value
+#define MPR121_RELEASE_THRESHOLD_DEFAULT 6 ///< default relese threshold value
+
+/*!
+ *  Device register map
+ */
+enum {
+  MPR121_TOUCHSTATUS_L = 0x00,
+  MPR121_TOUCHSTATUS_H = 0x01,
+  MPR121_FILTDATA_0L = 0x04,
+  MPR121_FILTDATA_0H = 0x05,
+  MPR121_BASELINE_0 = 0x1E,
+  MPR121_MHDR = 0x2B,
+  MPR121_NHDR = 0x2C,
+  MPR121_NCLR = 0x2D,
+  MPR121_FDLR = 0x2E,
+  MPR121_MHDF = 0x2F,
+  MPR121_NHDF = 0x30,
+  MPR121_NCLF = 0x31,
+  MPR121_FDLF = 0x32,
+  MPR121_NHDT = 0x33,
+  MPR121_NCLT = 0x34,
+  MPR121_FDLT = 0x35,
+
+  MPR121_TOUCHTH_0 = 0x41,
+  MPR121_RELEASETH_0 = 0x42,
+  MPR121_DEBOUNCE = 0x5B,
+  MPR121_CONFIG1 = 0x5C,
+  MPR121_CONFIG2 = 0x5D,
+  MPR121_CHARGECURR_0 = 0x5F,
+  MPR121_CHARGETIME_1 = 0x6C,
+  MPR121_ECR = 0x5E,
+  MPR121_AUTOCONFIG0 = 0x7B,
+  MPR121_AUTOCONFIG1 = 0x7C,
+  MPR121_UPLIMIT = 0x7D,
+  MPR121_LOWLIMIT = 0x7E,
+  MPR121_TARGETLIMIT = 0x7F,
+
+  MPR121_GPIODIR = 0x76,
+  MPR121_GPIOEN = 0x77,
+  MPR121_GPIOSET = 0x78,
+  MPR121_GPIOCLR = 0x79,
+  MPR121_GPIOTOGGLE = 0x7A,
+
+  MPR121_SOFTRESET = 0x80,
+};
+
+//.. thru to 0x1C/0x1D
+
+/*!
+ *  @brief  Class that stores state and functions for interacting with MPR121
+ *  proximity capacitive touch sensor controller.
+ */
+class Adafruit_MPR121 {
+public:
+  // Hardware I2C
+  Adafruit_MPR121();
+
+  bool begin(uint8_t i2c_addr = MPR121_I2CADDR_DEFAULT,
+             PinName i2c_sda = I2C_SDA,
+             PinName i2c_scl = I2C_SCL,
+             uint8_t touchThreshold = MPR121_TOUCH_THRESHOLD_DEFAULT,
+             uint8_t releaseThreshold = MPR121_RELEASE_THRESHOLD_DEFAULT);
+
+  uint16_t filteredData(uint8_t t);
+  uint16_t baselineData(uint8_t t);
+
+  uint8_t readRegister8(uint8_t reg);
+  uint16_t readRegister16(uint8_t reg);
+  void writeRegister(uint8_t reg, uint8_t value);
+  uint16_t touched(void);
+  // Add deprecated attribute so that the compiler shows a warning
+  void setThreshholds(uint8_t touch, uint8_t release)
+      __attribute__((deprecated));
+  void setThresholds(uint8_t touch, uint8_t release);
+
+private:
+  uint8_t i2c_addr;
+  mbed::I2C* i2c_dev = NULL;
+};
+
+#endif
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