Reset reason

[bp1979]

For STM I can read the reset reason as follows:

/** @brief  Check RCC flag is set or not.
  * @param  __FLAG__ specifies the flag to check.
  *         This parameter can be one of the following values:
  *            @arg RCC_FLAG_HSIRDY: HSI oscillator clock ready.
  *            @arg RCC_FLAG_HSERDY: HSE oscillator clock ready.
  *            @arg RCC_FLAG_PLLRDY: Main PLL clock ready.
  *            @arg RCC_FLAG_PLLI2SRDY: PLLI2S clock ready.
  *            @arg RCC_FLAG_LSERDY: LSE oscillator clock ready.
  *            @arg RCC_FLAG_LSIRDY: LSI oscillator clock ready.
  *            @arg RCC_FLAG_BORRST: POR/PDR or BOR reset.
  *            @arg RCC_FLAG_PINRST: Pin reset.
  *            @arg RCC_FLAG_PORRST: POR/PDR reset.
  *            @arg RCC_FLAG_SFTRST: Software reset.
  *            @arg RCC_FLAG_IWDGRST: Independent Watchdog reset.
  *            @arg RCC_FLAG_WWDGRST: Window Watchdog reset.
  *            @arg RCC_FLAG_LPWRRST: Low Power reset.
  * @retval The new state of __FLAG__ (TRUE or FALSE).
  */
#define RCC_FLAG_MASK  ((uint8_t)0x1FU)
#define __HAL_RCC_GET_FLAG(__FLAG__) (((((((__FLAG__) >> 5U) == 1U)? RCC->CR :((((__FLAG__) >> 5U) == 2U) ? RCC->BDCR :((((__FLAG__) >> 5U) == 3U)? RCC->CSR :RCC->CIR))) & (1U << ((__FLAG__) & RCC_FLAG_MASK)))!= 0U)? 1U : 0U)

/* Flags in the CSR register */
#define RCC_FLAG_LSIRDY                  ((uint8_t)0x61)
#define RCC_FLAG_BORRST                  ((uint8_t)0x79)
#define RCC_FLAG_PINRST                  ((uint8_t)0x7A)
#define RCC_FLAG_PORRST                  ((uint8_t)0x7B)
#define RCC_FLAG_SFTRST                  ((uint8_t)0x7C)
#define RCC_FLAG_IWDGRST                 ((uint8_t)0x7D)
#define RCC_FLAG_WWDGRST                 ((uint8_t)0x7E)
#define RCC_FLAG_LPWRRST                 ((uint8_t)0x7F)

How can I do this for an imx rt 1020?

thx

[FelipeGarcia · Accepted solution]

Hi,

Please check the SRC Reset Status Register (SRC_SRSR) in the reference manual. This register captures the reset sources that have occurred.

Best regards,

Felipe

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