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esp32s2: add brownout detector support

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1. add brownout detector HAL for esp32 and esp32s2
2. enable brownout reset for esp32 rev. 1 and above
3. add approximate brownout detector levels for esp32s2
This commit is contained in:
Ivan Grokhotkov
2020-01-21 16:32:28 +01:00
parent 46035032cf
commit 70752baba4
11 changed files with 259 additions and 30 deletions
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18
components/esp32/brownout.c
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@@ -20,6 +20,7 @@
#include "soc/soc.h"
#include "soc/cpu.h"
#include "soc/rtc_periph.h"
#include "hal/brownout_hal.h"
#include "esp32/rom/ets_sys.h"
#include "esp_private/system_internal.h"
#include "driver/rtc_cntl.h"
@@ -49,14 +50,17 @@ static void rtc_brownout_isr_handler(void *arg)
void esp_brownout_init(void)
{
REG_WRITE(RTC_CNTL_BROWN_OUT_REG,
RTC_CNTL_BROWN_OUT_ENA /* Enable BOD */
| RTC_CNTL_BROWN_OUT_PD_RF_ENA /* Automatically power down RF */
/* Reset timeout must be set to >1 even if BOR feature is not used */
| (2 << RTC_CNTL_BROWN_OUT_RST_WAIT_S)
| (BROWNOUT_DET_LVL << RTC_CNTL_DBROWN_OUT_THRES_S));
brownout_hal_config_t cfg = {
.threshold = BROWNOUT_DET_LVL,
.enabled = true,
.reset_enabled = false,
.flash_power_down = true,
.rf_power_down = true,
};
brownout_hal_config(&cfg);
ESP_ERROR_CHECK( rtc_isr_register(rtc_brownout_isr_handler, NULL, RTC_CNTL_BROWN_OUT_INT_ENA_M) );
REG_SET_BIT(RTC_CNTL_INT_ENA_REG, RTC_CNTL_BROWN_OUT_INT_ENA_M);
brownout_hal_intr_enable(true);
}