239 lines
7.7 KiB
C
239 lines
7.7 KiB
C
// Copyright (c) 2018 Cirque Corp. Restrictions apply. See: www.cirque.com/sw-license
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#include "cirque_pinnacle.h"
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#include "print.h"
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#include "debug.h"
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#include "wait.h"
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// Registers for RAP
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// clang-format off
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#define FIRMWARE_ID 0x00
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#define FIRMWARE_VERSION_C 0x01
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#define STATUS_1 0x02
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#define SYSCONFIG_1 0x03
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#define FEEDCONFIG_1 0x04
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#define FEEDCONFIG_2 0x05
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#define CALIBRATION_CONFIG_1 0x07
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#define PS2_AU_CONTROL 0x08
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#define SAMPLE_RATE 0x09
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#define Z_IDLE_COUNT 0x0A
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#define Z_SCALER 0x0B
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#define SLEEP_INTERVAL 0x0C
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#define SLEEP_TIMER 0x0D
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#define PACKET_BYTE_0 0x12
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#define PACKET_BYTE_1 0x13
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#define PACKET_BYTE_2 0x14
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#define PACKET_BYTE_3 0x15
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#define PACKET_BYTE_4 0x16
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#define PACKET_BYTE_5 0x17
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#define ERA_VALUE 0x1B
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#define ERA_HIGH_BYTE 0x1C
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#define ERA_LOW_BYTE 0x1D
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#define ERA_CONTROL 0x1E
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// ADC-attenuation settings (held in BIT_7 and BIT_6)
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// 1X = most sensitive, 4X = least sensitive
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#define ADC_ATTENUATE_1X 0x00
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#define ADC_ATTENUATE_2X 0x40
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#define ADC_ATTENUATE_3X 0x80
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#define ADC_ATTENUATE_4X 0xC0
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// Register config values for this demo
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#define SYSCONFIG_1_VALUE 0x00
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#define FEEDCONFIG_1_VALUE 0x03 // 0x03 for absolute mode 0x01 for relative mode
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#define FEEDCONFIG_2_VALUE 0x1C // 0x1F for normal functionality 0x1E for intellimouse disabled
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#define Z_IDLE_COUNT_VALUE 0x05
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// clang-format on
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bool touchpad_init;
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uint16_t scale_data = 1024;
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void cirque_pinnacle_clear_flags(void);
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void cirque_pinnacle_enable_feed(bool feedEnable);
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void RAP_ReadBytes(uint8_t address, uint8_t* data, uint8_t count);
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void RAP_Write(uint8_t address, uint8_t data);
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#ifdef CONSOLE_ENABLE
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void print_byte(uint8_t byte) {
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xprintf("%c%c%c%c%c%c%c%c|", (byte & 0x80 ? '1' : '0'), (byte & 0x40 ? '1' : '0'), (byte & 0x20 ? '1' : '0'), (byte & 0x10 ? '1' : '0'), (byte & 0x08 ? '1' : '0'), (byte & 0x04 ? '1' : '0'), (byte & 0x02 ? '1' : '0'), (byte & 0x01 ? '1' : '0'));
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}
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#endif
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/* Logical Scaling Functions */
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// Clips raw coordinates to "reachable" window of sensor
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// NOTE: values outside this window can only appear as a result of noise
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void ClipCoordinates(pinnacle_data_t* coordinates) {
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if (coordinates->xValue < CIRQUE_PINNACLE_X_LOWER) {
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coordinates->xValue = CIRQUE_PINNACLE_X_LOWER;
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} else if (coordinates->xValue > CIRQUE_PINNACLE_X_UPPER) {
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coordinates->xValue = CIRQUE_PINNACLE_X_UPPER;
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}
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if (coordinates->yValue < CIRQUE_PINNACLE_Y_LOWER) {
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coordinates->yValue = CIRQUE_PINNACLE_Y_LOWER;
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} else if (coordinates->yValue > CIRQUE_PINNACLE_Y_UPPER) {
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coordinates->yValue = CIRQUE_PINNACLE_Y_UPPER;
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}
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}
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uint16_t cirque_pinnacle_get_scale(void) {
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return scale_data;
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}
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void cirque_pinnacle_set_scale(uint16_t scale) {
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scale_data = scale;
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}
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// Scales data to desired X & Y resolution
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void cirque_pinnacle_scale_data(pinnacle_data_t* coordinates, uint16_t xResolution, uint16_t yResolution) {
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uint32_t xTemp = 0;
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uint32_t yTemp = 0;
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ClipCoordinates(coordinates);
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xTemp = coordinates->xValue;
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yTemp = coordinates->yValue;
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// translate coordinates to (0, 0) reference by subtracting edge-offset
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xTemp -= CIRQUE_PINNACLE_X_LOWER;
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yTemp -= CIRQUE_PINNACLE_Y_LOWER;
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// scale coordinates to (xResolution, yResolution) range
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coordinates->xValue = (uint16_t)(xTemp * xResolution / CIRQUE_PINNACLE_X_RANGE);
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coordinates->yValue = (uint16_t)(yTemp * yResolution / CIRQUE_PINNACLE_Y_RANGE);
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}
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// Clears Status1 register flags (SW_CC and SW_DR)
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void cirque_pinnacle_clear_flags() {
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RAP_Write(STATUS_1, 0x00);
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wait_us(50);
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}
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// Enables/Disables the feed
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void cirque_pinnacle_enable_feed(bool feedEnable) {
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uint8_t temp;
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RAP_ReadBytes(FEEDCONFIG_1, &temp, 1); // Store contents of FeedConfig1 register
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if (feedEnable) {
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temp |= 0x01; // Set Feed Enable bit
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RAP_Write(0x04, temp);
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} else {
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temp &= ~0x01; // Clear Feed Enable bit
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RAP_Write(0x04, temp);
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}
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}
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/* ERA (Extended Register Access) Functions */
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// Reads <count> bytes from an extended register at <address> (16-bit address),
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// stores values in <*data>
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void ERA_ReadBytes(uint16_t address, uint8_t* data, uint16_t count) {
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uint8_t ERAControlValue = 0xFF;
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cirque_pinnacle_enable_feed(false); // Disable feed
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RAP_Write(ERA_HIGH_BYTE, (uint8_t)(address >> 8)); // Send upper byte of ERA address
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RAP_Write(ERA_LOW_BYTE, (uint8_t)(address & 0x00FF)); // Send lower byte of ERA address
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for (uint16_t i = 0; i < count; i++) {
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RAP_Write(ERA_CONTROL, 0x05); // Signal ERA-read (auto-increment) to Pinnacle
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// Wait for status register 0x1E to clear
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do {
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RAP_ReadBytes(ERA_CONTROL, &ERAControlValue, 1);
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} while (ERAControlValue != 0x00);
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RAP_ReadBytes(ERA_VALUE, data + i, 1);
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cirque_pinnacle_clear_flags();
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}
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}
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// Writes a byte, <data>, to an extended register at <address> (16-bit address)
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void ERA_WriteByte(uint16_t address, uint8_t data) {
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uint8_t ERAControlValue = 0xFF;
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cirque_pinnacle_enable_feed(false); // Disable feed
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RAP_Write(ERA_VALUE, data); // Send data byte to be written
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RAP_Write(ERA_HIGH_BYTE, (uint8_t)(address >> 8)); // Upper byte of ERA address
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RAP_Write(ERA_LOW_BYTE, (uint8_t)(address & 0x00FF)); // Lower byte of ERA address
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RAP_Write(ERA_CONTROL, 0x02); // Signal an ERA-write to Pinnacle
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// Wait for status register 0x1E to clear
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do {
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RAP_ReadBytes(ERA_CONTROL, &ERAControlValue, 1);
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} while (ERAControlValue != 0x00);
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cirque_pinnacle_clear_flags();
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}
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void cirque_pinnacle_set_adc_attenuation(uint8_t adcGain) {
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uint8_t temp = 0x00;
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ERA_ReadBytes(0x0187, &temp, 1);
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temp &= 0x3F; // clear top two bits
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temp |= adcGain;
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ERA_WriteByte(0x0187, temp);
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ERA_ReadBytes(0x0187, &temp, 1);
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}
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// Changes thresholds to improve detection of fingers
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void cirque_pinnacle_tune_edge_sensitivity(void) {
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uint8_t temp = 0x00;
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ERA_ReadBytes(0x0149, &temp, 1);
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ERA_WriteByte(0x0149, 0x04);
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ERA_ReadBytes(0x0149, &temp, 1);
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ERA_ReadBytes(0x0168, &temp, 1);
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ERA_WriteByte(0x0168, 0x03);
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ERA_ReadBytes(0x0168, &temp, 1);
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}
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/* Pinnacle-based TM040040 Functions */
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void cirque_pinnacle_init(void) {
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#if defined(POINTING_DEVICE_DRIVER_cirque_pinnacle_spi)
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spi_init();
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#elif defined(POINTING_DEVICE_DRIVER_cirque_pinnacle_i2c)
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i2c_init();
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#endif
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touchpad_init = true;
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// Host clears SW_CC flag
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cirque_pinnacle_clear_flags();
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// Host configures bits of registers 0x03 and 0x05
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RAP_Write(SYSCONFIG_1, SYSCONFIG_1_VALUE);
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RAP_Write(FEEDCONFIG_2, FEEDCONFIG_2_VALUE);
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// Host enables preferred output mode (absolute)
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RAP_Write(FEEDCONFIG_1, FEEDCONFIG_1_VALUE);
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// Host sets z-idle packet count to 5 (default is 30)
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RAP_Write(Z_IDLE_COUNT, Z_IDLE_COUNT_VALUE);
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cirque_pinnacle_set_adc_attenuation(0xFF);
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cirque_pinnacle_tune_edge_sensitivity();
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cirque_pinnacle_enable_feed(true);
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}
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// Reads XYZ data from Pinnacle registers 0x14 through 0x17
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// Stores result in pinnacle_data_t struct with xValue, yValue, and zValue members
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pinnacle_data_t cirque_pinnacle_read_data(void) {
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uint8_t data[6] = {0};
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pinnacle_data_t result = {0};
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RAP_ReadBytes(PACKET_BYTE_0, data, 6);
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cirque_pinnacle_clear_flags();
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result.buttonFlags = data[0] & 0x3F;
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result.xValue = data[2] | ((data[4] & 0x0F) << 8);
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result.yValue = data[3] | ((data[4] & 0xF0) << 4);
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result.zValue = data[5] & 0x3F;
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result.touchDown = (result.xValue != 0 || result.yValue != 0);
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return result;
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}
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