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risc-v/esp32c3: Add hardware brownout check and reset

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This commit is contained in:
Dong Heng 2021-10-09 10:24:14 +08:00 committed by Alan Carvalho de Assis
parent 8d799f2148
commit f5c5d77744
6 changed files with 228 additions and 0 deletions
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52
arch/risc-v/src/esp32c3/Kconfig
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@ -357,6 +357,14 @@ config ESP32C3_BLE
---help---
Enable BLE support
config ESP32C3_BROWNOUT_DET
bool "Brownout Detect"
default y
---help---
The ESP32-C3 has a built-in brownout detector which can detect if the voltage is lower than
a specific value. If this happens, it will reset the chip in order to prevent unintended
behaviour.
endmenu # ESP32-C3 Peripheral Support
menuconfig ESP32C3_WIFI_BT_COEXIST
@ -1065,4 +1073,48 @@ config ESP32C3_PARTITION_TABLE_OFFSET
endmenu # Application Image Configuration
menu "Brownout Detect Configuration"
depends on ESP32C3_BROWNOUT_DET
choice ESP32C3_BROWNOUT_DET_LVL_SEL
prompt "Brownout voltage level"
default ESP32C3_BROWNOUT_DET_LVL_SEL_7
---help---
The brownout detector will reset the chip when the supply voltage is approximately
below this level. Note that there may be some variation of brownout voltage level
between each chip.
#The voltage levels here are estimates, more work needs to be done to figure out the exact voltages
#of the brownout threshold levels.
config ESP32C3_BROWNOUT_DET_LVL_SEL_7
bool "2.51V"
config ESP32C3_BROWNOUT_DET_LVL_SEL_6
bool "2.64V"
config ESP32C3_BROWNOUT_DET_LVL_SEL_5
bool "2.76V"
config ESP32C3_BROWNOUT_DET_LVL_SEL_4
bool "2.92V"
config ESP32C3_BROWNOUT_DET_LVL_SEL_3
bool "3.10V"
config ESP32C3_BROWNOUT_DET_LVL_SEL_2
bool "3.27V"
endchoice
config ESP32C3_BROWNOUT_DET_LVL
int
default 2 if ESP32C3_BROWNOUT_DET_LVL_SEL_2
default 3 if ESP32C3_BROWNOUT_DET_LVL_SEL_3
default 4 if ESP32C3_BROWNOUT_DET_LVL_SEL_4
default 5 if ESP32C3_BROWNOUT_DET_LVL_SEL_5
default 6 if ESP32C3_BROWNOUT_DET_LVL_SEL_6
default 7 if ESP32C3_BROWNOUT_DET_LVL_SEL_7
endmenu # ESP32C3_BROWNOUT_DET
endif # ARCH_CHIP_ESP32C3

4
arch/risc-v/src/esp32c3/Make.defs
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@ -172,6 +172,10 @@ ifeq ($(CONFIG_ESP32C3_RTC_HEAP),y)
CHIP_CSRCS += esp32c3_rtcheap.c
endif
ifeq ($(CONFIG_ESP32C3_BROWNOUT_DET),y)
CHIP_CSRCS += esp32c3_brownout.c
endif
ifeq ($(CONFIG_ESP32C3_WIRELESS),y)
WIRELESS_DRV_UNPACK = esp-wireless-drivers-3rdparty
WIRELESS_DRV_ID = 055f1ef

66
arch/risc-v/src/esp32c3/esp32c3_brownout.c Normal file
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@ -0,0 +1,66 @@
/****************************************************************************
* arch/risc-v/src/esp32c3/esp32c3_brownout.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include "esp32c3.h"
#include "hardware/esp32c3_rtccntl.h"
#include "hardware/regi2c_ctrl.h"
#include "hardware/regi2c_brownout.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define ESP32C3_BROWNOUT_VAL CONFIG_ESP32C3_BROWNOUT_DET_LVL
#define ESP32C3_BROWNOUT_RST_SEL 1
#define ESP32C3_BROWNOUT_RST_WAIT 0x3ff
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: esp32c3_brownout_init
*
* Description:
* Initialize hardware brownout check and reset.
*
****************************************************************************/
void esp32c3_brownout_init(void)
{
uint32_t regval;
REGI2C_WRITE_MASK(I2C_BOD, I2C_BOD_THRESHOLD, ESP32C3_BROWNOUT_VAL);
regval = RTC_CNTL_BROWN_OUT_ENA |
(ESP32C3_BROWNOUT_RST_SEL << RTC_CNTL_BROWN_OUT_RST_SEL_S) |
RTC_CNTL_BROWN_OUT_RST_ENA |
(ESP32C3_BROWNOUT_RST_WAIT << RTC_CNTL_BROWN_OUT_RST_WAIT_S) |
RTC_CNTL_BROWN_OUT_PD_RF_ENA |
RTC_CNTL_BROWN_OUT_CLOSE_FLASH_ENA;
putreg32(regval, RTC_CNTL_BROWN_OUT_REG);
}

65
arch/risc-v/src/esp32c3/esp32c3_brownout.h Normal file
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@ -0,0 +1,65 @@
/****************************************************************************
* arch/risc-v/src/esp32c3/esp32c3_brownout.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __ARCH_RISCV_SRC_ESP32C3_ESP32C3_BROWNOUT_H
#define __ARCH_RISCV_SRC_ESP32C3_ESP32C3_BROWNOUT_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Data
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: esp32c3_brownout_init
*
* Description:
* Initialize hardware brownout check and reset.
*
****************************************************************************/
void esp32c3_brownout_init(void);
#if defined(__cplusplus)
}
#endif
#undef EXTERN
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_RISCV_SRC_ESP32C3_ESP32C3_BROWNOUT_H */

10
arch/risc-v/src/esp32c3/esp32c3_start.c
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@ -38,6 +38,10 @@
#include "hardware/esp32c3_cache_memory.h"
#include "hardware/extmem_reg.h"
#ifdef CONFIG_ESP32C3_BROWNOUT_DET
# include "esp32c3_brownout.h"
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
@ -240,6 +244,12 @@ void __esp32c3_start(void)
esp32c3_clockconfig();
#ifdef CONFIG_ESP32C3_BROWNOUT_DET
/* Initialize hardware brownout check and reset */
esp32c3_brownout_init();
#endif
/* Configure the UART so we can get debug output */
esp32c3_lowsetup();

31
arch/risc-v/src/esp32c3/hardware/regi2c_brownout.h Normal file
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@ -0,0 +1,31 @@
/****************************************************************************
* arch/risc-v/src/esp32c3/hardware/regi2c_brownout.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __ARCH_RISCV_SRC_ESP32C3_HARDWARE_REGI2C_BROWNOUT_H_
#define __ARCH_RISCV_SRC_ESP32C3_HARDWARE_REGI2C_BROWNOUT_H_
#define I2C_BOD 0x61
#define I2C_BOD_HOSTID 0
#define I2C_BOD_THRESHOLD 0x5
#define I2C_BOD_THRESHOLD_MSB 2
#define I2C_BOD_THRESHOLD_LSB 0
#endif /* __ARCH_RISCV_SRC_ESP32C3_HARDWARE_REGI2C_BROWNOUT_H_ */