1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
// Copyright (c) 2018 Cirque Corp. Restrictions apply. See: www.cirque.com/sw-license
#include "cirque_pinnacle.h"
#include "print.h"
#include "debug.h"
#include "wait.h"
// Registers for RAP
// clang-format off
#define FIRMWARE_ID 0x00
#define FIRMWARE_VERSION_C 0x01
#define STATUS_1 0x02
#define SYSCONFIG_1 0x03
#define FEEDCONFIG_1 0x04
#define FEEDCONFIG_2 0x05
#define CALIBRATION_CONFIG_1 0x07
#define PS2_AU_CONTROL 0x08
#define SAMPLE_RATE 0x09
#define Z_IDLE_COUNT 0x0A
#define Z_SCALER 0x0B
#define SLEEP_INTERVAL 0x0C
#define SLEEP_TIMER 0x0D
#define PACKET_BYTE_0 0x12
#define PACKET_BYTE_1 0x13
#define PACKET_BYTE_2 0x14
#define PACKET_BYTE_3 0x15
#define PACKET_BYTE_4 0x16
#define PACKET_BYTE_5 0x17
#define ERA_VALUE 0x1B
#define ERA_HIGH_BYTE 0x1C
#define ERA_LOW_BYTE 0x1D
#define ERA_CONTROL 0x1E
// 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
// Register config values for this demo
#define SYSCONFIG_1_VALUE 0x00
#define FEEDCONFIG_1_VALUE 0x03 // 0x03 for absolute mode 0x01 for relative mode
#define FEEDCONFIG_2_VALUE 0x1C // 0x1F for normal functionality 0x1E for intellimouse disabled
#define Z_IDLE_COUNT_VALUE 0x05
// clang-format on
bool touchpad_init;
uint16_t scale_data = 1024;
void cirque_pinnacle_clear_flags(void);
void cirque_pinnacle_enable_feed(bool feedEnable);
void RAP_ReadBytes(uint8_t address, uint8_t* data, uint8_t count);
void RAP_Write(uint8_t address, uint8_t data);
#ifdef CONSOLE_ENABLE
void print_byte(uint8_t byte) { 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')); }
#endif
/* 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(pinnacle_data_t* coordinates) {
if (coordinates->xValue < CIRQUE_PINNACLE_X_LOWER) {
coordinates->xValue = CIRQUE_PINNACLE_X_LOWER;
} else if (coordinates->xValue > CIRQUE_PINNACLE_X_UPPER) {
coordinates->xValue = CIRQUE_PINNACLE_X_UPPER;
}
if (coordinates->yValue < CIRQUE_PINNACLE_Y_LOWER) {
coordinates->yValue = CIRQUE_PINNACLE_Y_LOWER;
} else if (coordinates->yValue > CIRQUE_PINNACLE_Y_UPPER) {
coordinates->yValue = CIRQUE_PINNACLE_Y_UPPER;
}
}
uint16_t cirque_pinnacle_get_scale(void) { return scale_data; }
void cirque_pinnacle_set_scale(uint16_t scale) { scale_data = scale; }
// Scales data to desired X & Y resolution
void cirque_pinnacle_scale_data(pinnacle_data_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 -= CIRQUE_PINNACLE_X_LOWER;
yTemp -= CIRQUE_PINNACLE_Y_LOWER;
// scale coordinates to (xResolution, yResolution) range
coordinates->xValue = (uint16_t)(xTemp * xResolution / CIRQUE_PINNACLE_X_RANGE);
coordinates->yValue = (uint16_t)(yTemp * yResolution / CIRQUE_PINNACLE_Y_RANGE);
}
// Clears Status1 register flags (SW_CC and SW_DR)
void cirque_pinnacle_clear_flags() {
RAP_Write(STATUS_1, 0x00);
wait_us(50);
}
// Enables/Disables the feed
void cirque_pinnacle_enable_feed(bool feedEnable) {
uint8_t temp;
RAP_ReadBytes(FEEDCONFIG_1, &temp, 1); // Store contents of FeedConfig1 register
if (feedEnable) {
temp |= 0x01; // Set Feed Enable bit
RAP_Write(0x04, temp);
} else {
temp &= ~0x01; // Clear Feed Enable bit
RAP_Write(0x04, temp);
}
}
/* 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) {
uint8_t ERAControlValue = 0xFF;
cirque_pinnacle_enable_feed(false); // Disable feed
RAP_Write(ERA_HIGH_BYTE, (uint8_t)(address >> 8)); // Send upper byte of ERA address
RAP_Write(ERA_LOW_BYTE, (uint8_t)(address & 0x00FF)); // Send lower byte of ERA address
for (uint16_t i = 0; i < count; i++) {
RAP_Write(ERA_CONTROL, 0x05); // Signal ERA-read (auto-increment) to Pinnacle
// Wait for status register 0x1E to clear
do {
RAP_ReadBytes(ERA_CONTROL, &ERAControlValue, 1);
} while (ERAControlValue != 0x00);
RAP_ReadBytes(ERA_VALUE, data + i, 1);
cirque_pinnacle_clear_flags();
}
}
// Writes a byte, <data>, to an extended register at <address> (16-bit address)
void ERA_WriteByte(uint16_t address, uint8_t data) {
uint8_t ERAControlValue = 0xFF;
cirque_pinnacle_enable_feed(false); // Disable feed
RAP_Write(ERA_VALUE, data); // Send data byte to be written
RAP_Write(ERA_HIGH_BYTE, (uint8_t)(address >> 8)); // Upper byte of ERA address
RAP_Write(ERA_LOW_BYTE, (uint8_t)(address & 0x00FF)); // Lower byte of ERA address
RAP_Write(ERA_CONTROL, 0x02); // Signal an ERA-write to Pinnacle
// Wait for status register 0x1E to clear
do {
RAP_ReadBytes(ERA_CONTROL, &ERAControlValue, 1);
} while (ERAControlValue != 0x00);
cirque_pinnacle_clear_flags();
}
void cirque_pinnacle_set_adc_attenuation(uint8_t adcGain) {
uint8_t temp = 0x00;
ERA_ReadBytes(0x0187, &temp, 1);
temp &= 0x3F; // clear top two bits
temp |= adcGain;
ERA_WriteByte(0x0187, temp);
ERA_ReadBytes(0x0187, &temp, 1);
}
// Changes thresholds to improve detection of fingers
void cirque_pinnacle_tune_edge_sensitivity(void) {
uint8_t temp = 0x00;
ERA_ReadBytes(0x0149, &temp, 1);
ERA_WriteByte(0x0149, 0x04);
ERA_ReadBytes(0x0149, &temp, 1);
ERA_ReadBytes(0x0168, &temp, 1);
ERA_WriteByte(0x0168, 0x03);
ERA_ReadBytes(0x0168, &temp, 1);
}
/* Pinnacle-based TM040040 Functions */
void cirque_pinnacle_init(void) {
#if defined(POINTING_DEVICE_DRIVER_cirque_pinnacle_spi)
spi_init();
#elif defined(POINTING_DEVICE_DRIVER_cirque_pinnacle_i2c)
i2c_init();
#endif
touchpad_init = true;
// Host clears SW_CC flag
cirque_pinnacle_clear_flags();
// Host configures bits of registers 0x03 and 0x05
RAP_Write(SYSCONFIG_1, SYSCONFIG_1_VALUE);
RAP_Write(FEEDCONFIG_2, FEEDCONFIG_2_VALUE);
// Host enables preferred output mode (absolute)
RAP_Write(FEEDCONFIG_1, FEEDCONFIG_1_VALUE);
// Host sets z-idle packet count to 5 (default is 30)
RAP_Write(Z_IDLE_COUNT, Z_IDLE_COUNT_VALUE);
cirque_pinnacle_set_adc_attenuation(0xFF);
cirque_pinnacle_tune_edge_sensitivity();
cirque_pinnacle_enable_feed(true);
}
// Reads XYZ data from Pinnacle registers 0x14 through 0x17
// Stores result in pinnacle_data_t struct with xValue, yValue, and zValue members
pinnacle_data_t cirque_pinnacle_read_data(void) {
uint8_t data[6] = {0};
pinnacle_data_t result = {0};
RAP_ReadBytes(PACKET_BYTE_0, data, 6);
cirque_pinnacle_clear_flags();
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 || result.yValue != 0);
return result;
}
|
