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bring in deep sleep / external wake functions

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This commit is contained in:
joeycastillo
2024-09-18 17:37:20 -04:00
parent c02c89c880
commit d0ca6a025a
5 changed files with 160 additions and 126 deletions
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170
watch-library/hardware/watch/watch_deepsleep.c
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@@ -22,52 +22,53 @@
* SOFTWARE.
*/
#include "hpl_systick_config.h"
#include "watch_deepsleep.h"
#include "app.h"
#include "watch.h"
#include "watch_private.h"
#include "watch_extint.h"
void sleep(const uint8_t mode) {
PM->SLEEPCFG.bit.SLEEPMODE = mode;
// this warning only appears when you `make BOARD=OSO-SWAT-A1-02`. it's annoying,
// but i'd rather have it warn us at build-time than fail silently at run-time.
// besides, no one but me really has any of these boards anyway.
#if BTN_ALARM != GPIO(GPIO_PORTA, 2)
#warning This board revision does not support external wake on BTN_ALARM, so watch_register_extwake_callback will not work with it. Use watch_register_interrupt_callback instead.
#endif
// wait for the mode set to actually take, per SLEEPCFG note in data sheet:
// "A small latency happens between the store instruction and actual writing
// of the SLEEPCFG register due to bridges. Software has to make sure the
// SLEEPCFG register reads the wanted value before issuing WFI instruction."
while(PM->SLEEPCFG.bit.SLEEPMODE != mode);
void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback, bool level) {
uint32_t pinmux;
hri_rtc_tampctrl_reg_t config = RTC->MODE2.TAMPCTRL.reg;
__DSB();
__WFI();
}
switch (pin) {
case A4:
a4_callback = callback;
pinmux = PINMUX_PB00G_RTC_IN0;
config &= ~(3 << RTC_TAMPCTRL_IN0ACT_Pos);
config &= ~(1 << RTC_TAMPCTRL_TAMLVL0_Pos);
config |= 1 << RTC_TAMPCTRL_IN0ACT_Pos;
if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL0_Pos;
break;
case A2:
a2_callback = callback;
pinmux = PINMUX_PB02G_RTC_IN1;
config &= ~(3 << RTC_TAMPCTRL_IN1ACT_Pos);
config &= ~(1 << RTC_TAMPCTRL_TAMLVL1_Pos);
config |= 1 << RTC_TAMPCTRL_IN1ACT_Pos;
if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL1_Pos;
break;
case BTN_ALARM:
gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN);
btn_alarm_callback = callback;
pinmux = PINMUX_PA02G_RTC_IN2;
config &= ~(3 << RTC_TAMPCTRL_IN2ACT_Pos);
config &= ~(1 << RTC_TAMPCTRL_TAMLVL2_Pos);
config |= 1 << RTC_TAMPCTRL_IN2ACT_Pos;
if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL2_Pos;
break;
default:
return;
void watch_register_extwake_callback(uint8_t pin, watch_cb_t callback, bool level) {
uint32_t config = RTC->MODE2.TAMPCTRL.reg;
if (pin == HAL_GPIO_BTN_ALARM_pin()) {
HAL_GPIO_BTN_ALARM_in();
HAL_GPIO_BTN_ALARM_pulldown();
HAL_GPIO_BTN_ALARM_pmuxen(HAL_GPIO_PMUX_RTC);
btn_alarm_callback = callback;
config &= ~(3 << RTC_TAMPCTRL_IN2ACT_Pos);
config &= ~(1 << RTC_TAMPCTRL_TAMLVL2_Pos);
config |= 1 << RTC_TAMPCTRL_IN2ACT_Pos;
if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL2_Pos;
} else if (pin == HAL_GPIO_A2_pin()) {
HAL_GPIO_A2_in();
HAL_GPIO_A2_pmuxen(HAL_GPIO_PMUX_RTC);
a2_callback = callback;
config &= ~(3 << RTC_TAMPCTRL_IN1ACT_Pos);
config &= ~(1 << RTC_TAMPCTRL_TAMLVL1_Pos);
config |= 1 << RTC_TAMPCTRL_IN1ACT_Pos;
if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL1_Pos;
} else if (pin == HAL_GPIO_A4_pin()) {
HAL_GPIO_A4_in();
HAL_GPIO_A4_pmuxen(HAL_GPIO_PMUX_RTC);
a4_callback = callback;
config &= ~(3 << RTC_TAMPCTRL_IN0ACT_Pos);
config &= ~(1 << RTC_TAMPCTRL_TAMLVL0_Pos);
config |= 1 << RTC_TAMPCTRL_IN0ACT_Pos;
if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL0_Pos;
}
gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
gpio_set_pin_function(pin, pinmux);
// disable the RTC
RTC->MODE2.CTRLA.bit.ENABLE = 0;
@@ -75,9 +76,9 @@ void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback, bool le
// update the configuration
RTC->MODE2.TAMPCTRL.reg = config;
// re-enable the RTC
RTC->MODE2.CTRLA.bit.ENABLE = 1;
while (RTC->MODE2.SYNCBUSY.bit.ENABLE); // wait for RTC to be enabled
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
@@ -85,31 +86,29 @@ void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback, bool le
}
void watch_disable_extwake_interrupt(uint8_t pin) {
hri_rtc_tampctrl_reg_t config = hri_rtc_get_TAMPCTRL_reg(RTC, 0xFFFFFFFF);
uint32_t config = RTC->MODE2.TAMPCTRL.reg;
switch (pin) {
case A4:
a4_callback = NULL;
config &= ~(3 << RTC_TAMPCTRL_IN0ACT_Pos);
break;
case A2:
a2_callback = NULL;
config &= ~(3 << RTC_TAMPCTRL_IN1ACT_Pos);
break;
case BTN_ALARM:
btn_alarm_callback = NULL;
config &= ~(3 << RTC_TAMPCTRL_IN2ACT_Pos);
break;
default:
return;
if (pin == HAL_GPIO_BTN_ALARM_pin()) {
btn_alarm_callback = NULL;
config &= ~(3 << RTC_TAMPCTRL_IN2ACT_Pos);
} else if (pin == HAL_GPIO_A2_pin()) {
a2_callback = NULL;
config &= ~(3 << RTC_TAMPCTRL_IN1ACT_Pos);
}
else if (pin == HAL_GPIO_A4_pin()) {
a4_callback = NULL;
config &= ~(3 << RTC_TAMPCTRL_IN0ACT_Pos);
}
if (hri_rtcmode0_get_CTRLA_ENABLE_bit(RTC)) {
hri_rtcmode0_clear_CTRLA_ENABLE_bit(RTC);
hri_rtcmode0_wait_for_sync(RTC, RTC_MODE0_SYNCBUSY_ENABLE);
}
hri_rtc_write_TAMPCTRL_reg(RTC, config);
hri_rtcmode0_set_CTRLA_ENABLE_bit(RTC);
// disable the RTC
RTC->MODE2.CTRLA.bit.ENABLE = 0;
while (RTC->MODE2.SYNCBUSY.bit.ENABLE); // wait for RTC to be disabled
// update the configuration
RTC->MODE2.TAMPCTRL.reg = config;
// re-enable the RTC
RTC->MODE2.CTRLA.bit.ENABLE = 1;
}
void watch_store_backup_data(uint32_t data, uint8_t reg) {
@@ -135,20 +134,27 @@ static void _watch_disable_all_pins_except_rtc(void) {
// same with RTC/IN[1] and PB02
if (config & RTC_TAMPCTRL_IN1ACT_Msk) portb_pins_to_disable &= 0xFFFFFFFB;
// port A: always keep PA02 configured as-is; that's our ALARM button.
gpio_set_port_direction(0, 0xFFFFFFFB, GPIO_DIRECTION_OFF);
// port A: that last B is to always keep PA02 configured as-is; that's our ALARM button.
PORT->Group[0].DIRCLR.reg = 0xFFFFFFFB;
// WRCONFIG can only set half the pins at a time, so we need two writes. This sets pins 0-15.
PORT->Group[0].WRCONFIG.reg = PORT_WRCONFIG_WRPINCFG | 0xFFFB;
// ...and adding the HWSEL flag configures 16-31.
PORT->Group[0].WRCONFIG.reg = PORT_WRCONFIG_HWSEL | PORT_WRCONFIG_WRPINCFG | 0xffff;
// port B: disable all pins we didn't save above.
gpio_set_port_direction(1, portb_pins_to_disable, GPIO_DIRECTION_OFF);
PORT->Group[1].DIRCLR.reg = portb_pins_to_disable;
PORT->Group[1].WRCONFIG.reg = PORT_WRCONFIG_WRPINCFG | (portb_pins_to_disable & 0xFFFF);
PORT->Group[1].WRCONFIG.reg = PORT_WRCONFIG_HWSEL | PORT_WRCONFIG_WRPINCFG | (portb_pins_to_disable >> 16);
}
static void _watch_disable_all_peripherals_except_slcd(void) {
_watch_disable_tcc();
watch_disable_adc();
watch_disable_external_interrupts();
watch_disable_i2c();
// TODO: replace this with a proper function when we remove the debug UART
SERCOM3->USART.CTRLA.reg &= ~SERCOM_USART_CTRLA_ENABLE;
MCLK->APBCMASK.reg &= ~MCLK_APBCMASK_SERCOM3;
/// TODO: Actually disable all these peripherals! #SecondMovement
// watch_disable_i2c();
// SERCOM3->USART.CTRLA.reg &= ~SERCOM_USART_CTRLA_ENABLE;
// MCLK->APBCMASK.reg &= ~MCLK_APBCMASK_SERCOM3;
}
void watch_enter_sleep_mode(void) {
@@ -161,41 +167,21 @@ void watch_enter_sleep_mode(void) {
// disable brownout detector interrupt, which could inadvertently wake us up.
SUPC->INTENCLR.bit.BOD33DET = 1;
// per Microchip datasheet clarification DS80000782,
// work around silicon erratum 1.8.4 by disabling the SysTick interrupt, which is
// enabled as part of driver init, before going to sleep.
SysTick->CTRL = SysTick->CTRL & ~(CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos);
// disable all pins
_watch_disable_all_pins_except_rtc();
// enter standby (4); we basically hang out here until an interrupt wakes us.
sleep(4);
// and we awake! re-enable the brownout detector and SysTick interrupt
// and we awake! re-enable the brownout detector
SUPC->INTENSET.bit.BOD33DET = 1;
SysTick->CTRL = SysTick->CTRL | (CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos);
// call app_setup so the app can re-enable everything we disabled.
app_setup();
// and call app_wake_from_standby (since main won't have a chance to do it)
app_wake_from_standby();
}
void watch_enter_deep_sleep_mode(void) {
// identical to sleep mode except we disable the LCD first.
slcd_sync_deinit(&SEGMENT_LCD_0);
hri_mclk_clear_APBCMASK_SLCD_bit(SLCD);
watch_enter_sleep_mode();
}
void watch_enter_backup_mode(void) {
watch_rtc_disable_all_periodic_callbacks();
_watch_disable_all_peripherals_except_slcd();
slcd_sync_deinit(&SEGMENT_LCD_0);
hri_mclk_clear_APBCMASK_SLCD_bit(SLCD);
_watch_disable_all_pins_except_rtc();
// go into backup sleep mode (5). when we exit, the reset controller will take over.