Newer
Older
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
#include "epicardium.h"
#include "modules/modules.h"
#include "modules/log.h"
#include "card10.h"
#include "simo.h"
#include "lp.h"
#include "max86150.h"
#include "MAX77650-Arduino-Library.h"
#include "max32665.h"
#include "mxc_sys.h"
#include "mxc_pins.h"
#include <stdint.h>
/* Most code is taken and adapted rom EvKitExamples/LP/main.c */
static uint32_t old_clkcn;
static uint32_t old_perckcn0, old_perckcn1;
void GPIOWAKE_IRQHandler(void)
{
/* Nothing to do here */
}
static void switchToHIRC(void)
{
MXC_GCR->clkcn &= ~(MXC_S_GCR_CLKCN_PSC_DIV128);
MXC_GCR->clkcn |= MXC_S_GCR_CLKCN_PSC_DIV4;
MXC_GCR->clkcn |= MXC_F_GCR_CLKCN_HIRC_EN;
MXC_SETFIELD(
MXC_GCR->clkcn,
MXC_F_GCR_CLKCN_CLKSEL,
MXC_S_GCR_CLKCN_CLKSEL_HIRC
);
while (!(MXC_GCR->clkcn & MXC_F_GCR_CLKCN_CKRDY))
; /* Wait for the clock switch to occur */
/* Disable the now unused 96 MHz clock */
MXC_GCR->clkcn &= ~(MXC_F_GCR_CLKCN_HIRC96M_EN);
SystemCoreClockUpdate();
}
static void deepsleep(void)
{
SIMO_setVregO_B(810); /* Reduce VCOREB to 0.81 V */
LP_FastWakeupEnable();
LP_EnterDeepSleepMode();
SIMO_setVregO_B(1000); /* Restore VCOREB to 1 V */
}
static void turnOffClocks(void)
{
old_perckcn0 = MXC_GCR->perckcn0;
old_perckcn1 = MXC_GCR->perckcn1;
/* Allow the USB Switch to be turned off in deepsleep and backup modes. */
/* TODO: should this be the default setting? */
LP_USBSWLPDisable();
/* Disable all peripheral clocks except GPIO0 (needed for interrupt wakeup) */
MXC_GCR->perckcn0 = 0xFFFFFFFE;
MXC_GCR->perckcn1 = 0xFFFFFFFF;
}
static void turnOnClocks(void)
{
MXC_GCR->perckcn0 = old_perckcn0;
MXC_GCR->perckcn1 = old_perckcn1;
}
/*
* Move most GPIOs into a special low power state with the fact
* in mind that the external 3.3 V are switched off.
*
* E.g. this means that the SD card pins need to be pulled low
* to preven them from backfeeding into the 3.3 V rail via their
* external pull-up resistors.
*
* Pins needed to talk to the PMIC are left untouched.
* ECG AOUT and 32 kHz out as well.
*/
static void gpio_low_power(void)
{
/* clang-format off */
const gpio_cfg_t pins_low_power[] = {
{ PORT_0, PIN_0, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // FLash
{ PORT_0, PIN_1, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // Flash
{ PORT_0, PIN_2, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // Flash
{ PORT_0, PIN_3, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // Flash
{ PORT_0, PIN_4, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // Flash
{ PORT_0, PIN_5, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // Flash
{ PORT_0, PIN_6, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // I2C 3.3V
{ PORT_0, PIN_7, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // I2C 3.3V
{ PORT_0, PIN_8, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // Motor
{ PORT_0, PIN_9, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // UART TX
{ PORT_0, PIN_10, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // UART RX
{ PORT_0, PIN_11, GPIO_FUNC_IN, GPIO_PAD_PULL_DOWN }, // BMA400 interrupt
// 0, 12: PMIC IRQ
{ PORT_0, PIN_13, GPIO_FUNC_IN, GPIO_PAD_NONE }, // BHI160 interrupt, not sure if PP
// 0, 14: PMIC I2C
// 0, 15: PMIC I2C
{ PORT_0, PIN_16, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // PMIC AMUX
{ PORT_0, PIN_17, GPIO_FUNC_IN, GPIO_PAD_PULL_DOWN }, // SOA GPIO
// 0, 18: ECG AOUT
// 0, 19: 32 kHz
{ PORT_0, PIN_20, GPIO_FUNC_IN, GPIO_PAD_PULL_DOWN }, // Wristband 1
{ PORT_0, PIN_21, GPIO_FUNC_IN, GPIO_PAD_PULL_DOWN }, // Wristband 2
{ PORT_0, PIN_22, GPIO_FUNC_IN, GPIO_PAD_PULL_DOWN }, // Wristband 3
{ PORT_0, PIN_23, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // IR-LED
{ PORT_0, PIN_24, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // display SS
{ PORT_0, PIN_25, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // display MOSI
{ PORT_0, PIN_26, GPIO_FUNC_IN, GPIO_PAD_PULL_DOWN }, // SOA GPIO
{ PORT_0, PIN_27, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // display SCK
{ PORT_0, PIN_28, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // Backlight
{ PORT_0, PIN_29, GPIO_FUNC_IN, GPIO_PAD_PULL_DOWN }, // Wristband 4
// 0, 30: PMIC power hold
{ PORT_0, PIN_31, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // ECG switch
{ PORT_1, PIN_0, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // SDHC
{ PORT_1, PIN_1, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // SDHC
{ PORT_1, PIN_2, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // SDHC
{ PORT_1, PIN_3, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // SDHC
{ PORT_1, PIN_4, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // SDHC
{ PORT_1, PIN_5, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // SDHC
{ PORT_1, PIN_6, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // display RS
{ PORT_1, PIN_7, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // Portexpander interrupt
{ PORT_1, PIN_8, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // ECG CS TODO: better OUT high
{ PORT_1, PIN_9, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // ECG SDI
{ PORT_1, PIN_10, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // ECG SDO
{ PORT_1, PIN_11, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // ECG SCK
{ PORT_1, PIN_11, GPIO_FUNC_IN, GPIO_PAD_PULL_UP }, // ECG INT
{ PORT_1, PIN_13, GPIO_FUNC_IN, GPIO_PAD_NONE }, // PPG Interrupt
{ PORT_1, PIN_14, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // RGB LEDs
{ PORT_1, PIN_15, GPIO_FUNC_OUT, GPIO_PAD_NONE }, // RGB LEDs
};
/* clang-format on */
const unsigned int num_pins =
(sizeof(pins_low_power) / sizeof(gpio_cfg_t));
for (size_t i = 0; i < num_pins; i++) {
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
GPIO_OutClr(&pins_low_power[i]);
GPIO_Config(&pins_low_power[i]);
}
}
/*
* Go to deepsleep, turning off peripherals.
*
* This functions returns after waking up again.
* Currently the only wakeup source is an interrupt
* from the PMIC.
*
* Some peripherals and GPIOs are moved into a low
* power state before going to sleep. There is no guarantee
* that all peripherals will be moved to a low power state
*
* TODO: Move BHI160, BMA400, BME680, MAX30001 into a low
* power state.
*
* The state of the GPIOs and generally all peripherials
* on board is not restored after a wakeup.
*/
void sleep_deepsleep(void)
{
LOG_WARN("pmic", "Powersave");
epic_disp_backlight(0);
epic_leds_set_rocket(0, 0);
epic_leds_set_rocket(1, 0);
epic_leds_set_rocket(2, 0);
#if 1
/* This will fail if there is no
* harmonic board attached */
max86150_begin();
max86150_getINT1();
max86150_getINT2();
max86150_shutDown();
#endif
epic_bhi160_disable_all_sensors();
epic_bme680_deinit();
epic_max30001_disable_sensor();
MAX77650_setEN_SBB2(0b100);
MAX77650_setSBIA_LPM(true);
core1_stop();
MAX77650_getINT_GLBL();
gpio_low_power();
turnOffClocks();
old_clkcn = MXC_GCR->clkcn;
switchToHIRC();
deepsleep();
/* Now wait for an interrupt to wake us up */
turnOnClocks();
MXC_GCR->clkcn = old_clkcn;
while (!(MXC_GCR->clkcn & MXC_F_GCR_CLKCN_CKRDY))
; /* Wait for the clock switch to occur */
SystemCoreClockUpdate();
MAX77650_setEN_SBB2(0b110);
}