riot-ci/RIOT
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

cpu/esp32: use hibernate mode for pm_off

Browse Source 
Now, where the vendor files for light/deep sleep mode are added, function `pm_off` does not need to implement this mode by itself. Instead the existing deep sleep with disabled wakeup sources is used for pm_off.
This commit is contained in:
Gunar Schorcht 2020-02-19 10:31:52 +01:00
parent 3faf99a894
commit 15ea6feeaf
1 changed files with 3 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
cpu/esp32/periph/pm.c
View File

@ -22,6 +22,7 @@
#include "debug.h"
#include "esp_attr.h"
#include "esp_sleep.h"
#include "syscalls.h"
#include "rom/rtc.h"
@ -46,47 +47,8 @@ void pm_set_lowest(void)
void IRAM_ATTR pm_off(void)
{
DEBUG ("%s\n", __func__);
/* suspend UARTs */
for (int i = 0; i < 3; ++i) {
REG_SET_BIT(UART_FLOW_CONF_REG(i), UART_FORCE_XOFF);
uart_tx_wait_idle(i);
}
/* set all power down flags */
uint32_t pd_flags = RTC_SLEEP_PD_DIG |
RTC_SLEEP_PD_RTC_PERIPH |
RTC_SLEEP_PD_RTC_SLOW_MEM |
RTC_SLEEP_PD_RTC_FAST_MEM |
RTC_SLEEP_PD_RTC_MEM_FOLLOW_CPU |
RTC_SLEEP_PD_VDDSDIO;
rtc_sleep_config_t config = RTC_SLEEP_CONFIG_DEFAULT(pd_flags);
config.wifi_pd_en = 1;
config.rom_mem_pd_en = 1;
config.lslp_meminf_pd = 1;
/* Save current frequency and switch to XTAL */
rtc_cpu_freq_t cpu_freq = rtc_clk_cpu_freq_get();
rtc_clk_cpu_freq_set(RTC_CPU_FREQ_XTAL);
/* set deep sleep duration to forever */
rtc_sleep_set_wakeup_time(rtc_time_get() + ~0x0UL);
/* configure deep sleep */
rtc_sleep_init(config);
rtc_sleep_start(RTC_TIMER_TRIG_EN, 0);
/* Restore CPU frequency */
rtc_clk_cpu_freq_set(cpu_freq);
/* resume UARTs */
for (int i = 0; i < 3; ++i) {
REG_CLR_BIT(UART_FLOW_CONF_REG(i), UART_FORCE_XOFF);
REG_SET_BIT(UART_FLOW_CONF_REG(i), UART_FORCE_XON);
REG_CLR_BIT(UART_FLOW_CONF_REG(i), UART_FORCE_XON);
}
/* enter hibernate mode without any enabled wake-up sources */
esp_deep_sleep_start();
}
extern void esp_restart_noos(void) __attribute__ ((noreturn));