Hello,
My customer want to enter the ROM bootloader through the backdoor. As illustrated by Fig. 1 of the CC26xx Serial Bootloader Interface revA application report, they want to go through the following flow: POR > FLASH image valid > BL backdoor enabled > PinNumber.level == level. They use the TI Launchpad and connect DIO_4 to GND. Their code is the following:
#define SET_CCFG_BL_CONFIG_BOOTLOADER_ENABLE 0xC5 // Enable ROM boot loader
#define SET_CCFG_BL_CONFIG_BL_LEVEL 0x0 // Active low to open boot loader backdoor - PIN #9 (DIO_4)
#define SET_CCFG_BL_CONFIG_BL_PIN_NUMBER 9 // DIO number for boot loader backdoor - PIN #9 (DIO_4)
#define SET_CCFG_BL_CONFIG_BL_ENABLE 0xC5 // Enabled boot loader backdoor
#define SET_CCFG_IMAGE_VALID_CONF_IMAGE_VALID 0x00000000 // Flash image is valid
With this configuration, the software does not enter the bootloader. If they configure IMAGE_VALID to -1, it does enter the bootloder, but that's not the path they are supposed to follow. Could you please suggest some possible sources for this issue? Thank you.
Best regards,
François.
