I've been trying to find some info about SPI on the mentioned devboard but I wasn't successfull so far. The issue so far is that the device displays completely random values for my SPI Device which is a cirque round touchpad. Here's the docu for it. I modified the sample script to fit the pins and hooked it up using a fpc breakout board. The Github repo I got the code from
Code: Select all
// Copyright (c) 2018 Cirque Corp. Restrictions apply. See: www.cirque.com/sw-license
#include <SPI.h>
#include <string.h>
// ___ Using a Cirque TM0XX0XX and TM0XX0XX with a DK-000013-0x and Arduino ___
// This demonstration application is built to work with a Teensy 3.1/3.2 but it can easily be adapted to
// work with Arduino-based systems.
// This application connects to a TM0XX0XX (Sensor0) and TM0XX0XX (Sensor1) circular touch pad via SPI.
// To verify that your touch pad is configured for SPI-mode, make sure that R1 is populated with a 470k resistor
// (or whichever resistor connects pins 24 & 25 of the 1CA027 IC).
// The pad is configured for Absolute mode tracking. Touch data is sent in text format over USB CDC to
// the host PC. You can open a terminal window on the PC to the USB CDC port and see X, Y, and Z data
// fill the window when you touch the sensor.
// In the Arduino IDE use Tools->Serial Monitor to view touch data.
// This demo can use both sensor ports on the 02-000620-00REVA00 development board.
// You can configure which sensors are active using the SENSE0_SELECT and SENSE0_SELECT shown below.
// You can configure curved overlay or flat overlay using SENSE0_OVERLAY_CURVE and SENSE1_OVERLAY_CURVE shown below.
// NOTE: all config values applied in this sample are meant for a module using REXT = 976kOhm
// Pinnacle TM0XX0XX with Arduino
// Hardware Interface
// GND
// +3.3V
// SCK = Pin 13
// MISO = Pin 12
// MOSI = Pin 11
// SS = Pin 10 - or - Pin 8
// DR = Pin 9 - or - Pin 7
// Hardware pin-number labels
// SPI port definitions
#define SCK_PIN 12
#define DIN_PIN 13
#define DOUT_PIN 14
#define CS0_PIN 2 // Chip Select for Sensor 0
#define CS1_PIN 16 // Chip Select for Sensor 1
// Pinnacle Data-Ready pins
#define DR0_PIN 3 // Data-Ready for Sensor 0
#define DR1_PIN 9 // Data-Ready for Sensor 1
// I2C pins (not used in this demo)
#define SDA_PIN 18
#define SCL_PIN 19
#define LED_0 21
#define LED_1 20
// Masks for Cirque Register Access Protocol (RAP)
#define WRITE_MASK 0x80
#define READ_MASK 0xA0
// Register config values for this demo
#define SYSCONFIG_1 0x00
#define FEEDCONFIG_1 0x02
#define FEEDCONFIG_2 0x1F
#define Z_IDLE_COUNT 0x05
//const uint16_t ZONESCALE = 256; // 256 position steps between electrodes
//const uint16_t ROWS_Y = 6; // Number of Y electrodes
//const uint16_t COLS_X = 8; // Number of X electrodes
// Coordinate scaling values
#define PINNACLE_XMAX 2047 // max value Pinnacle can report for X (0 to (8 * 256) - 1)
#define PINNACLE_YMAX 1535 // max value Pinnacle can report for Y (0 to (6 * 256) - 1)
#define PINNACLE_X_LOWER 127 // min "reachable" X value
#define PINNACLE_X_UPPER 1919 // max "reachable" X value
#define PINNACLE_Y_LOWER 63 // min "reachable" Y value
#define PINNACLE_Y_UPPER 1471 // max "reachable" Y value
#define PINNACLE_X_RANGE (PINNACLE_X_UPPER-PINNACLE_X_LOWER)
#define PINNACLE_Y_RANGE (PINNACLE_Y_UPPER-PINNACLE_Y_LOWER)
#define ZONESCALE 256 // divisor for reducing x,y values to an array index for the LUT
#define ROWS_Y ((PINNACLE_YMAX + 1) / ZONESCALE)
#define COLS_X ((PINNACLE_XMAX + 1) / ZONESCALE)
// ADC-attenuation settings (held in BIT_7 and BIT_6)
// 1X = most sensitive, 4X = least sensitive
#define ADC_ATTENUATE_1X 0x00
#define ADC_ATTENUATE_2X 0x40
#define ADC_ATTENUATE_3X 0x80
#define ADC_ATTENUATE_4X 0xC0
#define ADC_LOWER_DEFAULT 0x02
// Select sensors that are active
// 1 = On, 0 = Off
#define SENSE0_SELECT 1
#define SENSE1_SELECT 0
// Select the overlay type
// 1 = Curved Overlay, 0 = Flat Overlay
#define SENSE0_OVERLAY_CURVE 1
#define SENSE1_OVERLAY_CURVE 1
#define DEFAULT_WRITE_DELAY 50
// Convenient way to store and access measurements
typedef struct _absData
{
uint16_t xValue;
uint16_t yValue;
uint16_t zValue;
uint8_t buttonFlags;
bool touchDown;
bool hovering;
} absData_t;
absData_t touchData_Sense0;
absData_t touchData_Sense1;
// Used to differentiate between the two sensors
typedef struct _padData
{
uint8_t CS_Pin;
uint8_t DR_Pin;
uint8_t LED_Pin;
} padData_t;
padData_t Pad_Sense0;
padData_t Pad_Sense1;
// These values require tuning for optimal touch-response
// Each element represents the Z-value below which is considered "hovering" in that XY region of the sensor.
// The values present are not guaranteed to work for all HW configurations.
const uint8_t ZVALUE_MAP[ROWS_Y][COLS_X] =
{
{0, 0, 0, 0, 0, 0, 0, 0},
{0, 2, 3, 5, 5, 3, 2, 0},
{0, 3, 5, 15, 15, 5, 2, 0},
{0, 3, 5, 15, 15, 5, 3, 0},
{0, 2, 3, 5, 5, 3, 2, 0},
{0, 0, 0, 0, 0, 0, 0, 0},
};
// setup() gets called once at power-up, sets up serial debug output and Cirque's Pinnacle ASIC.
void setup()
{
Serial.begin(9600);
while(!Serial); // needed for USB
String str = "";
pinMode(LED_0, OUTPUT);
pinMode(LED_1, OUTPUT);
Pad_Sense0.CS_Pin = CS0_PIN;
Pad_Sense0.DR_Pin = DR0_PIN;
Pad_Sense0.LED_Pin = LED_0;
Pad_Sense1.CS_Pin = CS1_PIN;
Pad_Sense1.DR_Pin = DR1_PIN;
Pad_Sense1.LED_Pin = LED_1;
if(SENSE0_SELECT) Pinnacle_Init(&Pad_Sense0);
if(SENSE1_SELECT) Pinnacle_Init(&Pad_Sense1);
// These functions are required for use with thick overlays (curved)
if(SENSE0_OVERLAY_CURVE)
{
setAdcAttenuation(ADC_ATTENUATE_2X, &Pad_Sense0);
tuneEdgeSensitivity(&Pad_Sense0);
Pinnacle_forceCalibration(&Pad_Sense0);
}
if(SENSE1_OVERLAY_CURVE)
{
setAdcAttenuation(ADC_ATTENUATE_2X, &Pad_Sense1);
tuneEdgeSensitivity(&Pad_Sense1);
Pinnacle_forceCalibration(&Pad_Sense1);
}
Serial.println();
str = (SENSE1_SELECT && SENSE0_SELECT) ? ("\tX\tY\tZ\t\t\tX\tY\tZ\tBTN") :
(SENSE1_SELECT) ? ("SENSE 1\tX\tY\tZ") :
(SENSE0_SELECT) ? ("SENSE 0\tX\tY\tZ\tBTN") :
("BOTH SENSORS DISABLED .. ENABLE SENSOR SELECT");
Serial.println(str);
Pinnacle_EnableFeed(true, &Pad_Sense0);
Pinnacle_EnableFeed(true, &Pad_Sense1);
}
// loop() continuously checks to see if data-ready (DR) is high. If so, reads and reports touch data to terminal.
void loop()
{
String printData = "";
// Note: the two Pinnacles are not synchronized. In a polling loop like this you
// may get one or both of the sensors reporting new data. We just grab what data
// there is and write it.
if(DR_Asserted(&Pad_Sense0) && SENSE0_SELECT)
{
Pinnacle_GetAbsolute(&touchData_Sense0, &Pad_Sense0);
Pinnacle_CheckValidTouch(&touchData_Sense0); // Checks for "hover" caused by curved overlays
ScaleData(&touchData_Sense0, 1024, 1024); // Scale coordinates to arbitrary X, Y resolution
printData += "SENS_0 ";
Pinnacle_DataToString(&touchData_Sense0, &printData, SENSE0_OVERLAY_CURVE);
if(SENSE1_SELECT && !DR_Asserted(&Pad_Sense1))
{
printData += "\t\t\t\t\t\t" + String(touchData_Sense0.buttonFlags);
}
}
if(DR_Asserted(&Pad_Sense1) && SENSE1_SELECT)
{
Pinnacle_GetAbsolute(&touchData_Sense1, &Pad_Sense1);
Pinnacle_CheckValidTouch(&touchData_Sense1); // Checks for "hover" caused by curved overlays
ScaleData(&touchData_Sense1, 1024, 1024); // Scale coordinates to arbitrary X, Y resolution
printData += (SENSE0_SELECT && printData.length() == 0) ? ("\t\t\t\t\tSENS_1 ") :
(SENSE0_SELECT) ? "\t\tSENS_1 " :
"SENS_1 ";
Pinnacle_DataToString(&touchData_Sense1, &printData, SENSE1_OVERLAY_CURVE);
printData += "\t" + String(touchData_Sense0.buttonFlags);
}
if (printData.length() != 0)
{
// if there is data to write then write it
printData += "\n";
Serial.print(printData);
}
AssertSensorLED(touchData_Sense0.touchDown, Pad_Sense0.LED_Pin);
AssertSensorLED(touchData_Sense1.touchDown, Pad_Sense1.LED_Pin);
}
// General Print function to display the parameters
void Pinnacle_DataToString(absData_t * touchData, String * str, bool curve)
{
str->concat(String(touchData->xValue));
str->concat("\t");
str->concat(String(touchData->yValue));
str->concat("\t");
str->concat(String(touchData->zValue));
if(curve)
{
if(Pinnacle_zIdlePacket(touchData))
{
str->concat("-L "); // append 'Liftoff' code to end of string
}
else if(touchData->hovering)
{
str->concat("-H "); // append 'Hover' code to end of string
}
else
{
str->concat("-V "); // append 'Valid' code to end of string
}
}
}
/* Pinnacle functions */
void Pinnacle_Init(padData_t * currPad)
{
RAP_Init(currPad);
DeAssert_CS(currPad->CS_Pin);
pinMode(currPad->DR_Pin, INPUT);
// Host clears SW_CC flag
Pinnacle_ClearFlags(currPad);
// Host configures bits of registers 0x03 and 0x05
RAP_Write(0x03, SYSCONFIG_1, currPad->CS_Pin);
RAP_Write(0x05, FEEDCONFIG_2, currPad->CS_Pin);
// Host enables preferred output mode (absolute)
RAP_Write(0x04, FEEDCONFIG_1, currPad->CS_Pin);
// Host sets z-idle packet count to 5 (default is 30)
RAP_Write(0x0A, Z_IDLE_COUNT, currPad->CS_Pin);
Serial.println("Pinnacle Initialized...");
}
// Reads XYZ data from Pinnacle registers 0x14 through 0x17
// Stores result in absData_t struct with xValue, yValue, and zValue members
void Pinnacle_GetAbsolute(absData_t * result, padData_t * currPad)
{
uint8_t data[6] = { 0,0,0,0,0,0 };
RAP_ReadBytes(0x12, data, 6, currPad->CS_Pin);
Pinnacle_ClearFlags(currPad);
result->buttonFlags = data[0] & 0x3F;
result->xValue = data[2] | ((data[4] & 0x0F) << 8);
result->yValue = data[3] | ((data[4] & 0xF0) << 4);
result->zValue = data[5] & 0x3F;
result->touchDown = result->xValue != 0;
}
// Forces Pinnacle to re-calibrate. If the touchpad is reporting touches when
// no fingers are on the pad then calibration (compensation) is wrong.
// Calling this function will fix the problem. Warning; re-enable the feed after calling this
void Pinnacle_forceCalibration(padData_t * currPad)
{
uint8_t CalConfig1Value = 0x00;
Pinnacle_EnableFeed(false, currPad);
RAP_ReadBytes(0x07, &CalConfig1Value, 1, currPad->CS_Pin);
CalConfig1Value |= 0x01;
RAP_Write(0x07, CalConfig1Value, currPad->CS_Pin);
do
{
RAP_ReadBytes(0x07, &CalConfig1Value, 1, currPad->CS_Pin);
}
while(CalConfig1Value & 0x01);
Pinnacle_ClearFlags(currPad);
}
// Checks touch data to see if it is a z-idle packet (all zeros)
bool Pinnacle_zIdlePacket(absData_t * data)
{
return data->xValue == 0 && data->yValue == 0 && data->zValue == 0;
}
// Clears Status1 register flags (SW_CC and SW_DR)
void Pinnacle_ClearFlags(padData_t * currPad)
{
RAP_Write(0x02, 0x00, currPad->CS_Pin);
}
// Enables/Disables the feed
void Pinnacle_EnableFeed(bool feedEnable, padData_t * currPad)
{
uint8_t temp;
RAP_ReadBytes(0x04, &temp, 1, currPad->CS_Pin); // Store contents of FeedConfig1 register
if(feedEnable)
{
temp |= 0x01; // Set Feed Enable bit
RAP_Write(0x04, temp, currPad->CS_Pin);
}
else
{
temp &= ~0x01; // Clear Feed Enable bit
RAP_Write(0x04, temp, currPad->CS_Pin);
}
}
/* Curved Overlay Functions */
// Adjusts the feedback in the ADC, effectively attenuating the finger signal
// By default, the the signal is maximally attenuated (ADC_ATTENUATE_4X for use with thin, flat overlays
void setAdcAttenuation(uint8_t adcGain, padData_t * currPad)
{
uint8_t temp = 0x00;
Serial.println();
Serial.println("Setting ADC Gain...");
ERA_ReadBytes(0x0187, &temp, 1, currPad);
Serial.print("Current value:\t");
Serial.println(temp, HEX);
temp &= 0x3F; // clear top two bits
temp |= adcGain; // set top two bits to the desired ADC Gain Value
ERA_WriteByte(0x0187, temp, currPad);
ERA_ReadBytes(0x0187, &temp, 1, currPad);
Serial.print("New value:\t");
Serial.print(temp, HEX);
switch(adcGain)
{
case ADC_ATTENUATE_1X:
Serial.println(" (X/1)");
break;
case ADC_ATTENUATE_2X:
Serial.println(" (X/2)");
break;
case ADC_ATTENUATE_3X:
Serial.println(" (X/3)");
break;
case ADC_ATTENUATE_4X:
Serial.println(" (X/4)");
break;
default:
break;
}
}
// Changes thresholds to improve detection of fingers
void tuneEdgeSensitivity(padData_t * currPad)
{
uint8_t temp = 0x00;
Serial.println();
Serial.println("Setting xAxis.WideZMin...");
ERA_ReadBytes(0x0149, &temp, 1, currPad);
Serial.print("Current value:\t");
Serial.println(temp, HEX);
ERA_WriteByte(0x0149, 0x04, currPad);
ERA_ReadBytes(0x0149, &temp, 1, currPad);
Serial.print("New value:\t");
Serial.println(temp, HEX);
Serial.println();
Serial.println("Setting yAxis.WideZMin...");
ERA_ReadBytes(0x0168, &temp, 1, currPad);
Serial.print("Current value:\t");
Serial.println(temp, HEX);
ERA_WriteByte(0x0168, 0x03, currPad);
ERA_ReadBytes(0x0168, &temp, 1, currPad);
Serial.print("New value:\t");
Serial.println(temp, HEX);
}
// This function identifies when a finger is "hovering" so your system can choose to ignore it.
// The sensor detects the finger in the space above the sensor. If the finger is on the surface of the sensor the Z value is highest.
// If the finger is a few millimeters above the surface the z value is much lower.
// Adding a curved overlay will allow the finger to be closer in the middle (so a higher z value) but farther
// on the perimeter (so a lower z value).
// With a curved overlay you tune the gain of the system to see a finger on the perimeter of the sensor
// (the finger is farther away). Unfortunately a finger near the center will be detected above the surface.
// This code will tell you when to ignore that "hovering" finger.
// ZVALUE_MAP[][] stores a lookup table in which you can define the Z-value and XY position that is considered "hovering". Experimentation/tuning is required.
// NOTE: Z-value output decreases to 0 as you move your finger away from the sensor, and it's maximum value is 0x63 (6-bits).
void Pinnacle_CheckValidTouch(absData_t * touchData)
{
uint32_t zone_x, zone_y;
//eliminate hovering
zone_x = touchData->xValue / ZONESCALE;
zone_y = touchData->yValue / ZONESCALE;
touchData->hovering = !(touchData->zValue > ZVALUE_MAP[zone_y][zone_x]);
}
/* ERA (Extended Register Access) Functions */
// Reads <count> bytes from an extended register at <address> (16-bit address),
// stores values in <*data>
void ERA_ReadBytes(uint16_t address, uint8_t * data, uint16_t count, padData_t * currPad)
{
uint8_t ERAControlValue = 0xFF;
Pinnacle_EnableFeed(false, currPad); // Disable feed
RAP_Write(0x1C, (uint8_t)(address >> 8), currPad->CS_Pin); // Send upper byte of ERA address
RAP_Write(0x1D, (uint8_t)(address & 0x00FF), currPad->CS_Pin); // Send lower byte of ERA address
for(uint16_t i = 0; i < count; i++)
{
RAP_Write(0x1E, 0x05, currPad->CS_Pin); // Signal ERA-read (auto-increment) to Pinnacle
// Wait for status register 0x1E to clear
do
{
RAP_ReadBytes(0x1E, &ERAControlValue, 1, currPad->CS_Pin);
} while(ERAControlValue != 0x00);
// Read register to verify that the new value is there.
RAP_ReadBytes(0x1B, data + i, 1, currPad->CS_Pin);
Pinnacle_ClearFlags(currPad);
}
}
// Writes a byte, <data>, to an extended register at <address> (16-bit address)
void ERA_WriteByte(uint16_t address, uint8_t data, padData_t * currPad)
{
uint8_t ERAControlValue = 0xFF;
Pinnacle_EnableFeed(false, currPad); // Disable feed
RAP_Write(0x1B, data, currPad->CS_Pin); // Send data byte to be written
RAP_Write(0x1C, (uint8_t)(address >> 8), currPad->CS_Pin); // Upper byte of ERA address
RAP_Write(0x1D, (uint8_t)(address & 0x00FF), currPad->CS_Pin); // Lower byte of ERA address
RAP_Write(0x1E, 0x02, currPad->CS_Pin); // Signal an ERA-write to Pinnacle
// Wait for status register 0x1E to clear
do
{
RAP_ReadBytes(0x1E, &ERAControlValue, 1, currPad->CS_Pin);
} while(ERAControlValue != 0x00);
delayMicroseconds(DEFAULT_WRITE_DELAY);
Pinnacle_ClearFlags(currPad);
}
/* RAP Functions */
void RAP_Init(padData_t *currPad)
{
pinMode(currPad->CS_Pin, OUTPUT);
SPI.begin();
}
// Reads <count> Pinnacle registers starting at <address>
void RAP_ReadBytes(byte address, byte * data, byte count, uint8_t currCSPin)
{
byte cmdByte = READ_MASK | address; // Form the READ command byte
SPI.beginTransaction(SPISettings(10000000, MSBFIRST, SPI_MODE1));
Assert_CS(currCSPin);
SPI.transfer(cmdByte); // Signal a RAP-read operation starting at <address>
SPI.transfer(0xFC); // Filler byte
SPI.transfer(0xFC); // Filler byte
for(byte i = 0; i < count; i++)
{
data[i] = SPI.transfer(0xFC); // Each subsequent SPI transfer gets another register's contents
}
DeAssert_CS(currCSPin);
SPI.endTransaction();
}
// Writes single-byte <data> to <address>
void RAP_Write(byte address, byte data, uint8_t currCSPin)
{
byte cmdByte = WRITE_MASK | address; // Form the WRITE command byte
SPI.beginTransaction(SPISettings(10000000, MSBFIRST, SPI_MODE1));
Assert_CS(currCSPin);
SPI.transfer(cmdByte); // Signal a write to register at <address>
SPI.transfer(data); // Send <value> to be written to register
DeAssert_CS(currCSPin);
SPI.endTransaction();
delayMicroseconds(DEFAULT_WRITE_DELAY);
}
/* Logical Scaling Functions */
// Clips raw coordinates to "reachable" window of sensor
// NOTE: values outside this window can only appear as a result of noise
void ClipCoordinates(absData_t * coordinates)
{
if(coordinates->xValue < PINNACLE_X_LOWER)
{
coordinates->xValue = PINNACLE_X_LOWER;
}
else if(coordinates->xValue > PINNACLE_X_UPPER)
{
coordinates->xValue = PINNACLE_X_UPPER;
}
if(coordinates->yValue < PINNACLE_Y_LOWER)
{
coordinates->yValue = PINNACLE_Y_LOWER;
}
else if(coordinates->yValue > PINNACLE_Y_UPPER)
{
coordinates->yValue = PINNACLE_Y_UPPER;
}
}
// Scales data to desired X & Y resolution
void ScaleData(absData_t * coordinates, uint16_t xResolution, uint16_t yResolution)
{
uint32_t xTemp = 0;
uint32_t yTemp = 0;
ClipCoordinates(coordinates);
xTemp = coordinates->xValue;
yTemp = coordinates->yValue;
// translate coordinates to (0, 0) reference by subtracting edge-offset
xTemp -= PINNACLE_X_LOWER;
yTemp -= PINNACLE_Y_LOWER;
// scale coordinates to (xResolution, yResolution) range
coordinates->xValue = (uint16_t)(xTemp * xResolution / PINNACLE_X_RANGE);
coordinates->yValue = (uint16_t)(yTemp * yResolution / PINNACLE_Y_RANGE);
}
/* I/O Functions */
void Assert_CS(uint8_t currPin)
{
digitalWrite(currPin, LOW);
}
void DeAssert_CS(uint8_t currPin)
{
digitalWrite(currPin, HIGH);
}
void AssertSensorLED(bool state, uint8_t CURR_LED)
{
digitalWrite(CURR_LED, !state);
}
bool DR_Asserted(padData_t * padData)
{
return digitalRead(padData->DR_Pin);
}
The touchpads are fine as they work perfectly on a teensy3.2SENS_0 1024 1024 63-V
SENS_0 1024 1024 63-V
SENS_0 1024 1024 63-V
SENS_0 1024 1024 63-V
SENS_0 1024 1024 63-V
SENS_0 0 0 0-L
SENS_0 1024 1024 60-V
SENS_0 0 0 0-L
SENS_0 1024 1024 63-V
SENS_0 1024 1024 63-V
SENS_0 1024 1024 63-V
SENS_0 1024 1024 63-V
SENS_0 1024 1024 63-V
I hope someone can help me with this