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SC7A20 handle address

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This commit is contained in:
Ben V. Brown
2022-02-12 11:13:41 +11:00
parent ba119007ff
commit 730f7cf415
3 changed files with 58 additions and 39 deletions
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20
source/Core/Drivers/SC7A20.cpp
View File

@@ -9,15 +9,29 @@
#include <SC7A20_defines.h>
#include <array>
uint8_t SC7A20::activeAddress;
bool SC7A20::detect() {
if (FRToSI2C::probe(SC7A20_ADDRESS)) {
// Read chip id to ensure its not an address collision
uint8_t id = 0;
if (FRToSI2C::Mem_Read(SC7A20_ADDRESS, SC7A20_WHO_AMI_I, &id, 1)) {
return id == 0b00010001;
if (id == SC7A20_WHO_AM_I_VALUE) {
activeAddress = SC7A20_ADDRESS;
return true;
}
}
}
if (FRToSI2C::probe(SC7A20_ADDRESS2)) {
// Read chip id to ensure its not an address collision
uint8_t id = 0;
if (FRToSI2C::Mem_Read(SC7A20_ADDRESS2, SC7A20_WHO_AMI_I, &id, 1)) {
if (id == SC7A20_WHO_AM_I_VALUE) {
activeAddress = SC7A20_ADDRESS2;
return true;
}
}
}
return false;
}
@@ -50,7 +64,7 @@ bool SC7A20::initalize() {
// Hysteresis is set to ~ 16 counts
// Theta blocking is set to 0b10
return FRToSI2C::writeRegistersBulk(SC7A20_ADDRESS, i2c_registers, sizeof(i2c_registers) / sizeof(i2c_registers[0]));
return FRToSI2C::writeRegistersBulk(activeAddress, i2c_registers, sizeof(i2c_registers) / sizeof(i2c_registers[0]));
}
void SC7A20::getAxisReadings(int16_t &x, int16_t &y, int16_t &z) {

3
source/Core/Drivers/SC7A20.hpp
View File

@@ -17,7 +17,7 @@ public:
static bool initalize();
// 1 = rh, 2,=lh, 8=flat
static Orientation getOrientation() {
uint8_t val = ((FRToSI2C::I2C_RegisterRead(SC7A20_ADDRESS, SC7A20_INT2_SOURCE) >> 2) - 1);
uint8_t val = ((FRToSI2C::I2C_RegisterRead(activeAddress, SC7A20_INT2_SOURCE) >> 2) - 1);
if (val == 1)
return Orientation::ORIENTATION_LEFT_HAND;
else if (val == 4 || val == 0)
@@ -28,6 +28,7 @@ public:
static void getAxisReadings(int16_t &x, int16_t &y, int16_t &z);
private:
static uint8_t activeAddress;
};
#endif /* CORE_DRIVERS_BMA223_HPP_ */

74
source/Core/Drivers/SC7A20_defines.h
View File

@@ -1,5 +1,5 @@
/*
* BMA223_defines.h
* SC7A20_defines.h
*
* Created on: 18 Sep. 2020
* Author: Ralim
@@ -8,39 +8,43 @@
#ifndef CORE_DRIVERS_SC7A20_DEFINES_H_
#define CORE_DRIVERS_SC7A20_DEFINES_H_
#define SC7A20_ADDRESS 0x18 << 1
#define SC7A20_WHO_AMI_I 0x0F
#define SC7A20_CTRL_REG1 0x20
#define SC7A20_CTRL_REG2 0x21
#define SC7A20_CTRL_REG3 0x22
#define SC7A20_CTRL_REG4 0x23
#define SC7A20_CTRL_REG5 0x24
#define SC7A20_CTRL_REG6 0x25
#define SC7A20_REFERENCE 0x26
#define SC7A20_STATUS_REG 0x27
#define SC7A20_OUT_X_L 0x28
#define SC7A20_OUT_X_H 0x29
#define SC7A20_OUT_Y_L 0x2A
#define SC7A20_OUT_Y_H 0x2B
#define SC7A20_OUT_Z_L 0x2C
#define SC7A20_OUT_Z_H 0x2D
#define SC7A20_FIFO_CTRL 0x2E
#define SC7A20_FIFO_SRC 0x2F
#define SC7A20_INT1_CFG 0x30
#define SC7A20_INT1_SOURCE 0x31
#define SC7A20_INT1_THS 0x32
#define SC7A20_INT1_DURATION 0x33
#define SC7A20_INT2_CFG 0x34
#define SC7A20_INT2_SOURCE 0x35
#define SC7A20_INT2_THS 0x36
#define SC7A20_INT2_DURATION 0x37
#define SC7A20_CLICK_CFG 0x38
#define SC7A20_CLICK_SRC 0x39
#define SC7A20_CLICK_THS 0x3A
#define SC7A20_TIME_LIMIT 0x3B
#define SC7A20_TIME_LATENCY 0x3C
#define SC7A20_TIME_WINDOW 0x3D
#define SC7A20_ACT_THS 0x3E
#define SC7A20_ACT_DURATION 0x3F
#define SC7A20_ADDRESS 0x18 << 1
// Sometimes the SC7A20 turns up programmed to impersonate the LIS2DH12
#define SC7A20_ADDRESS2 (25 << 1)
#define SC7A20_WHO_AM_I_VALUE (0b00010001)
#define SC7A20_WHO_AMI_I 0x0F
#define SC7A20_CTRL_REG1 0x20
#define SC7A20_CTRL_REG2 0x21
#define SC7A20_CTRL_REG3 0x22
#define SC7A20_CTRL_REG4 0x23
#define SC7A20_CTRL_REG5 0x24
#define SC7A20_CTRL_REG6 0x25
#define SC7A20_REFERENCE 0x26
#define SC7A20_STATUS_REG 0x27
#define SC7A20_OUT_X_L 0x28
#define SC7A20_OUT_X_H 0x29
#define SC7A20_OUT_Y_L 0x2A
#define SC7A20_OUT_Y_H 0x2B
#define SC7A20_OUT_Z_L 0x2C
#define SC7A20_OUT_Z_H 0x2D
#define SC7A20_FIFO_CTRL 0x2E
#define SC7A20_FIFO_SRC 0x2F
#define SC7A20_INT1_CFG 0x30
#define SC7A20_INT1_SOURCE 0x31
#define SC7A20_INT1_THS 0x32
#define SC7A20_INT1_DURATION 0x33
#define SC7A20_INT2_CFG 0x34
#define SC7A20_INT2_SOURCE 0x35
#define SC7A20_INT2_THS 0x36
#define SC7A20_INT2_DURATION 0x37
#define SC7A20_CLICK_CFG 0x38
#define SC7A20_CLICK_SRC 0x39
#define SC7A20_CLICK_THS 0x3A
#define SC7A20_TIME_LIMIT 0x3B
#define SC7A20_TIME_LATENCY 0x3C
#define SC7A20_TIME_WINDOW 0x3D
#define SC7A20_ACT_THS 0x3E
#define SC7A20_ACT_DURATION 0x3F
#endif /* CORE_DRIVERS_BMA223_DEFINES_H_ */