esp-idf/components/esp32/include/esp_panic.h

#ifndef PANIC_H
#define PANIC_H

#ifdef __cplusplus
extern "C"
{
#endif

#define PANIC_RSN_NONE 0
#define PANIC_RSN_DEBUGEXCEPTION 1
#define PANIC_RSN_DOUBLEEXCEPTION 2
#define PANIC_RSN_KERNELEXCEPTION 3
#define PANIC_RSN_COPROCEXCEPTION 4
#define PANIC_RSN_INTWDT_CPU0 5
#define PANIC_RSN_INTWDT_CPU1 6
#define PANIC_RSN_MAX 6


#ifndef __ASSEMBLER__

#include "esp_err.h"


/**
 * @brief If an OCD is connected over JTAG. set breakpoint 0 to the given function 
 *        address. Do nothing otherwise.
 * @param data  Pointer to the target breakpoint position
 */

void esp_set_breakpoint_if_jtag(void *fn);

#define ESP_WATCHPOINT_LOAD 0x40000000
#define ESP_WATCHPOINT_STORE 0x80000000
#define ESP_WATCHPOINT_ACCESS 0xC0000000

/**
 * @brief Set a watchpoint to break/panic when a certain memory range is accessed.
 *
 * @param no Watchpoint number. On the ESP32, this can be 0 or 1.
 * @param adr Base address to watch
 * @param size Size of the region, starting at the base address, to watch. Must
 *             be one of 2^n, with n in [0..6].
 * @param flags One of ESP_WATCHPOINT_* flags
 *
 * @return ESP_ERR_INVALID_ARG on invalid arg, ESP_OK otherwise
 *
 * @warning The ESP32 watchpoint hardware watches a region of bytes by effectively 
 *          masking away the lower n bits for a region with size 2^n. If adr does
 *          not have zero for these lower n bits, you may not be watching the
 *          region you intended.
 */
esp_err_t esp_set_watchpoint(int no, void *adr, int size, int flags);


/**
 * @brief Clear a watchpoint
 *
 * @param no Watchpoint to clear
 *
 */
void esp_clear_watchpoint(int no);


#endif

#ifdef __cplusplus
}
#endif

#endif