问答

[backcolor=rgb(255, 255, 255)][font=Microsoft Yahei, Avenir, Segoe UI, Hiragino Sans GB, STHeiti, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif][color=#333333]各位大佬们多提提宝贵建议定位根本原因，跪谢。[/color][/font][/backcolor] [backcolor=rgb(255, 255, 255)][font=Microsoft Yahei, Avenir, Segoe UI, Hiragino Sans GB, STHeiti, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif][color=#333333]STM32L452 在未知情况下打开了读保护RDP？ [/color][/font][font=Microsoft Yahei, Avenir, Segoe UI, Hiragino Sans GB, STHeiti, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif][color=#333333]MCU无法运行，只有解除读保护后重新烧录固件[/color][/font] [font=Microsoft Yahei, Avenir, Segoe UI, Hiragino Sans GB, STHeiti, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif][color=#333333]这是一个未知情况下打开RDP的异常，主程序源码为bootloader+APP[/color][/font][/backcolor] [color=#333333][backcolor=rgb(255, 255, 255)][font="]check bootloader有一个读RDP状态操作，[/font][/backcolor][/color] [color=#333333][backcolor=rgb(255, 255, 255)][font="]APP有操作option byte。[/font][/backcolor][/color] [color=#333333][backcolor=rgb(255, 255, 255)][font="]以上操作都为官方HAL库[/font][/backcolor][/color]

#define OB_BASE ((uint32_t)0x1FFFF800) /*!< FLASH Option Bytes base address */#define OB ((OB_TypeDef *) OB_BASE) FLASH_Status FLASH_OB_Erase(void) { uint16_t rdptmp = OB_RDP_Level_0; FLASH_Status status = FLASH_COMPLETE; /* Get the actual read protection Option Byte value */ if(FLASH_OB_GetRDP() != RESET) { rdptmp = 0x00; } /* Wait for last operation to be completed */ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); if(status == FLASH_COMPLETE) { /* If the previous operation is completed, proceed to erase the option bytes */ FLASH->CR |= FLASH_CR_OPTER; FLASH->CR |= FLASH_CR_STRT; /* Wait for last operation to be completed */ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); if(status == FLASH_COMPLETE) { /* If the erase operation is completed, disable the OPTER Bit */ FLASH->CR &= ~FLASH_CR_OPTER; /* Enable the Option Bytes Programming operation */ FLASH->CR |= FLASH_CR_OPTPG; /* Restore the last read protection Option Byte value */ OB->RDP = (uint16_t)rdptmp; /* Wait for last operation to be completed */ status = FLASH_WaitForLastOperation(FLASH_ER_PRG_TIMEOUT); if(status != FLASH_TIMEOUT) { /* if the program operation is completed, disable the OPTPG Bit */ FLASH->CR &= ~FLASH_CR_OPTPG; } } else { if (status != FLASH_TIMEOUT) { /* Disable the OPTPG Bit */ FLASH->CR &= ~FLASH_CR_OPTPG; } } } /* Return the erase status */ return status; } 请问有用过极海的读保护的吗，这个OPT.FLM文件去哪找

根据外设demo可以看到有密钥，这个密钥可自己进行配置吗？有没有什么要求