/*---------------------------------------------------------------------------*/
void
lpm_init()
{
list_init(modules_list);
/* Always wake up on any DIO edge detection */
ti_lib_aon_event_mcu_wake_up_set(AON_EVENT_MCU_WU2, AON_EVENT_IO);
}
/*---------------------------------------------------------------------------*/
void
cc26xx_rtc_init(void)
{
uint32_t compare_value;
bool interrupts_disabled;
/* Disable and clear interrupts */
interrupts_disabled = ti_lib_int_master_disable();
ti_lib_aon_rtc_disable();
ti_lib_aon_rtc_event_clear(AON_RTC_CH0);
ti_lib_aon_rtc_event_clear(AON_RTC_CH2);
/* Setup the wakeup event */
ti_lib_aon_event_mcu_wake_up_set(AON_EVENT_MCU_WU0, AON_EVENT_RTC0);
ti_lib_aon_event_mcu_wake_up_set(AON_EVENT_MCU_WU1, AON_EVENT_RTC2);
ti_lib_aon_rtc_combined_event_config(AON_RTC_CH0 | AON_RTC_CH2);
/* Configure channel 2 in continuous compare, 128 ticks / sec */
ti_lib_aon_rtc_inc_value_ch2_set(RTIMER_SECOND / CLOCK_SECOND);
ti_lib_aon_rtc_mode_ch2_set(AON_RTC_MODE_CH2_CONTINUOUS);
compare_value = (RTIMER_SECOND / CLOCK_SECOND) +
ti_lib_aon_rtc_current_compare_value_get();
ti_lib_aon_rtc_compare_value_set(AON_RTC_CH2, compare_value);
/* Enable channel 2 and the RTC */
ti_lib_aon_rtc_channel_enable(AON_RTC_CH2);
ti_lib_aon_rtc_enable();
ti_lib_int_enable(INT_AON_RTC);
/* Re-enable interrupts */
if(!interrupts_disabled) {
ti_lib_int_master_enable();
}
}
/*---------------------------------------------------------------------------*/
void
lpm_shutdown(uint32_t wakeup_pin, uint32_t io_pull, uint32_t wake_on)
{
lpm_registered_module_t *module;
int i;
uint32_t io_cfg = (IOC_STD_INPUT & ~IOC_IOPULL_M) | io_pull |
wake_on;
/* This procedure may not be interrupted */
ti_lib_int_master_disable();
/* Disable the RTC */
ti_lib_aon_rtc_disable();
ti_lib_aon_rtc_event_clear(AON_RTC_CH0);
ti_lib_aon_rtc_event_clear(AON_RTC_CH1);
ti_lib_aon_rtc_event_clear(AON_RTC_CH2);
/* Reset AON even fabric to default wakeup sources */
for(i = AON_EVENT_MCU_WU0; i <= AON_EVENT_MCU_WU3; i++) {
ti_lib_aon_event_mcu_wake_up_set(i, AON_EVENT_NONE);
}
for(i = AON_EVENT_AUX_WU0; i <= AON_EVENT_AUX_WU2; i++) {
ti_lib_aon_event_aux_wake_up_set(i, AON_EVENT_NONE);
}
ti_lib_sys_ctrl_aon_sync();
watchdog_periodic();
/* Notify all modules that we're shutting down */
for(module = list_head(modules_list); module != NULL;
module = module->next) {
if(module->shutdown) {
module->shutdown(LPM_MODE_SHUTDOWN);
}
}
/* Configure the wakeup trigger */
if(wakeup_pin != IOID_UNUSED) {
ti_lib_gpio_dir_mode_set((1 << wakeup_pin), GPIO_DIR_MODE_IN);
ti_lib_ioc_port_configure_set(wakeup_pin, IOC_PORT_GPIO, io_cfg);
}
/* Freeze I/O latches in AON */
ti_lib_aon_ioc_freeze_enable();
/* Turn off RFCORE, SERIAL and PERIPH PDs. This will happen immediately */
ti_lib_prcm_power_domain_off(PRCM_DOMAIN_RFCORE | PRCM_DOMAIN_SERIAL |
PRCM_DOMAIN_PERIPH);
oscillators_switch_to_hf_rc();
oscillators_select_lf_rcosc();
/* Configure clock sources for MCU and AUX: No clock */
ti_lib_aon_wuc_mcu_power_down_config(AONWUC_NO_CLOCK);
ti_lib_aon_wuc_aux_power_down_config(AONWUC_NO_CLOCK);
/* Disable SRAM and AUX retentions */
ti_lib_aon_wuc_mcu_sram_config(0);
ti_lib_aon_wuc_aux_sram_config(false);
/*
* Request CPU, SYSBYS and VIMS PD off.
* This will only happen when the CM3 enters deep sleep
*/
ti_lib_prcm_power_domain_off(PRCM_DOMAIN_CPU | PRCM_DOMAIN_VIMS |
PRCM_DOMAIN_SYSBUS);
/* Request JTAG domain power off */
ti_lib_aon_wuc_jtag_power_off();
/* Turn off AUX */
ti_lib_aux_wuc_power_ctrl(AUX_WUC_POWER_OFF);
ti_lib_aon_wuc_domain_power_down_enable();
while(ti_lib_aon_wuc_power_status_get() & AONWUC_AUX_POWER_ON);
/*
* Request MCU VD power off.
* This will only happen when the CM3 enters deep sleep
*/
ti_lib_prcm_mcu_power_off();
/* Set MCU wakeup to immediate and disable virtual power off */
ti_lib_aon_wuc_mcu_wake_up_config(MCU_IMM_WAKE_UP);
ti_lib_aon_wuc_mcu_power_off_config(MCU_VIRT_PWOFF_DISABLE);
/* Latch the IOs in the padring and enable I/O pad sleep mode */
ti_lib_pwr_ctrl_io_freeze_enable();
/* Turn off VIMS cache, CRAM and TRAM - possibly not required */
ti_lib_prcm_cache_retention_disable();
ti_lib_vims_mode_set(VIMS_BASE, VIMS_MODE_OFF);
/* Enable shutdown and sync AON */
ti_lib_aon_wuc_shut_down_enable();
ti_lib_sys_ctrl_aon_sync();
/* Deep Sleep */
ti_lib_prcm_deep_sleep();
}
