-
Notifications
You must be signed in to change notification settings - Fork 7
/
Copy pathmax30101.c
247 lines (143 loc) · 4.38 KB
/
max30101.c
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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
#include "max30101.h"
#include "string.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#define MAX30101_ADDRESS 0x57
#define MAX30102_IR_POWER 45
#define MAX30102_RED_POWER 45
#define MAX30102_GREEN_POWER 125
static nrf_drv_twi_t m_twi;
static void wait_100_ms() {
max30101_100_ms_timer = 0x00;
while (!max30101_100_ms_timer) {
if (NRF_LOG_PROCESS() == false) {
nrf_pwr_mgmt_run();
}
}
}
static uint8_t i2c_write8(uint8_t address, uint8_t reg) {
uint16_t timeout = UINT16_MAX;
uint8_t txBuffer = reg;
twi_write_done = 0x00;
twi_read_done = 0x00;
twi_address_nack = 0x00;
ret_code_t result = nrf_drv_twi_tx(&m_twi, address, &txBuffer, 1, true);
if (result == NRF_SUCCESS) {
while (!twi_write_done && --timeout) {
}
if (!timeout || twi_address_nack) {
return 0x00;
} else {
return 0x01;
}
} else {
return 0x00;
}
}
static uint8_t i2c_write16(uint8_t address, uint8_t reg, uint8_t value) {
uint16_t timeout = UINT16_MAX;
uint8_t txBuffer[2] = { 0x00 };
txBuffer[0] = reg;
txBuffer[1] = value;
twi_write_done = 0x00;
twi_read_done = 0x00;
twi_address_nack = 0x00;
ret_code_t result = nrf_drv_twi_tx(&m_twi, address, txBuffer, 2, false);
if (result == NRF_SUCCESS) {
while (!twi_write_done && --timeout) {
}
if (!timeout || twi_address_nack) {
return 0x00;
} else {
return 0x01;
}
} else {
return 0x00;
}
}
static uint8_t i2c_read_buffer(uint8_t address, uint8_t *read_value,
const uint8_t buffer_size) {
uint16_t timeout = UINT16_MAX;
uint8_t rxBuffer[buffer_size];
twi_write_done = 0x00;
twi_read_done = 0x00;
twi_address_nack = 0x00;
ret_code_t result = nrf_drv_twi_rx(&m_twi, address, rxBuffer, buffer_size);
if (result == NRF_SUCCESS) {
while (!twi_write_done && --timeout) {
}
memcpy(read_value, rxBuffer, buffer_size);
if (!timeout || twi_address_nack) {
return 0x00;
} else {
return 0x01;
}
} else {
return 0x00;
}
}
void set_max30101_i2c_instance(nrf_drv_twi_t twi_instance) {
m_twi = twi_instance;
}
uint8_t init_max30101() {
uint8_t i2c_state = 0x01;
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x02, 0x40);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x03, 0x00);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x04, 0x00);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x05, 0x00);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x06, 0x00);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x08, 0b00101111);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x09, 0x07);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x0A, 0b00100111);
//RED PPG Power Setting
i2c_state = i2c_state
& i2c_write16(MAX30101_ADDRESS, 0x0C, MAX30102_RED_POWER);
//IR PPG Power Setting
i2c_state = i2c_state
& i2c_write16(MAX30101_ADDRESS, 0x0D, MAX30102_IR_POWER);
//GREEN PPG Power Setting
i2c_state = i2c_state
& i2c_write16(MAX30101_ADDRESS, 0x0E, MAX30102_GREEN_POWER);
//GREEN PPG Power Setting
i2c_state = i2c_state
& i2c_write16(MAX30101_ADDRESS, 0x0F, MAX30102_GREEN_POWER);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x10, 0x7F);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x11, 0x21);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x12, 0x03);
i2c_state = i2c_state & i2c_write16(MAX30101_ADDRESS, 0x09, 0x83);
for (uint8_t i = 0; i < 2; i++) {
wait_100_ms();
}
return i2c_state;
}
uint8_t set_max30101_normal_mode() {
uint8_t i2c_state = i2c_write16(MAX30101_ADDRESS, 0x09, 0x07);
return i2c_state;
}
uint8_t set_max30101_sleep_mode() {
uint8_t i2c_state = i2c_write16(MAX30101_ADDRESS, 0x09, 0x83);
return i2c_state;
}
uint8_t get_max30101_ir_red_green(uint32_t *ir, uint32_t *red, uint32_t *green) {
uint8_t i2c_state = 0x00;
uint8_t read_buffer[9] = { 0x00 };
i2c_state = i2c_write8(MAX30101_ADDRESS, 0x07);
i2c_state = i2c_state & i2c_read_buffer(MAX30101_ADDRESS, read_buffer, 9);
uint32_t value = (read_buffer[0] << 16);
value += (read_buffer[1] << 8);
value += read_buffer[2];
value = value & 0x03FFFF;
*red = value;
value = (read_buffer[3] << 16);
value += (read_buffer[4] << 8);
value += read_buffer[5];
value = value & 0x03FFFF;
*ir = value;
value = (read_buffer[6] << 16);
value += (read_buffer[7] << 8);
value += read_buffer[8];
value = value & 0x03FFFF;
*green = value;
return i2c_state;
}