how to protect my code from reading

[TARHAN SAMAH]

hello i need to protect my code from reading or just protect the two first pages is enough because ill put my devices on market ?

i cliked on execute only code option in keil flash options

my code doesnt compile here is the error :

..\Middlewares\Third_Party\FreeRTOS\Source\portable\RVDS\ARM_CM3\port.c(254): error: A1944E: Literal pool entries cannot be generated in execute-only sections

..\Middlewares\Third_Party\FreeRTOS\Source\portable\RVDS\ARM_CM3\port.c(272): error: A1944E: Literal pool entries cannot be generated in execute-only sections

..\Middlewares\Third_Party\FreeRTOS\Source\portable\RVDS\ARM_CM3\port.c(405): error: A1944E: Literal pool entries cannot be generated in execute-only sections

what should i do ???

[TARHAN SAMAH]

in hal config

its opened

#ifdef HAL_FLASH_MODULE_ENABLED

 #include "stm32f1xx_hal_flash.h"

i added

 #include "stm32f1xx_hal_flash_ex.h"// i add it 

it didnt affect still it doesnt detect FLASH_OB_RDP_LevelConfig

[TARHAN SAMAH · Accepted solution]

prblm solved with st link utility

open option bytes

then select enable read out protection then download the new option byte by selecting apply .

then you will see if you try to connect to device it says that cannot read memory ..

[TARHAN SAMAH]

there is also this way by code someone told me it thanks mister yilmaz from stm :look at the attached main file here ..good luck

[GY]

PoVEL A Use this code instead:

FLASH_OBProgramInitTypeDef obInit;   /* Allow Access to option bytes sector */

HAL_FLASH_Unlock();

HAL_FLASH_OB_Unlock();

 obInit.OptionType = OPTIONBYTE_RDP;

 obInit.WRPState  = OB_RDP_LEVEL_1; // VERY IMPORTANT !! DONT SET TO LEVEL2//MCU FUSE WILL SET FOR EVER.// MCU OR BOARD MAYBE UNUSABLE//

 HAL_FLASHEx_OBProgram(&obInit);   /* Start the Option Bytes programming process */

 //HAL_FLASH_OB_Launch();   /* Prevent Access to option bytes sector */

 HAL_FLASH_OB_Lock();   /* Disable the Flash option control register access (recommended to protect   the option Bytes against possible unwanted operations)*/

HAL_FLASH_Lock();