Hello dear friends,
this is my first post and I need your help with an issue I have. I designed some devices based on STM32C031C6. I use an I2C command to jump to bootloader and I upload the new firmware via I2C also from a microcomputer using the stm32flash software.
The problem comes when I switch to RDP L1. Then, stm32flash can't upload the new firmware. As far I understood, before the upload a mass erase should be done, which is not possible. I can change the RDP level from stm32flash using -k and -j parameters, but this is possible only when I enter bootloader using the jumper configuration. If I enter bootloader from the software via the I2C command, -k and -j parameters result on a NACK from the device.
- How can I complete the upload process via I2C, while my devices are secured with RDP L1?
- Is the issue software related?
- Do I need to switch RDP levels, before the upload? If yes, is a power circle also required?
Here is the code I use for the bootloader jump:
void JumpToBootloader(void) {
void (*SysMemBootJump)(void);
// System memory base address for STM32C031xx series
volatile uint32_t addr = 0x1FFF0000;
// Disable all interrupts and reset peripherals to avoid conflicts
__disable_irq();
HAL_RCC_DeInit();
HAL_DeInit();
RCC->APBENR1 &= ~RCC_APBENR1_I2C1EN; // Disable I2C1 clock
RCC->IOPENR &= ~(RCC_IOPENR_GPIOAEN | RCC_IOPENR_GPIOBEN | RCC_IOPENR_GPIOCEN);
SysTick->CTRL = 0;
SysTick->LOAD = 0;
SysTick->VAL = 0;
NVIC_ClearPendingIRQ(I2C1_IRQn); // Clear any pending I2C interrupts
SYSCFG->CFGR1 |= 0x01; // Remap system memory
SysMemBootJump = (void (*)(void)) (*((uint32_t *)(addr + 4)));
__set_MSP(*(uint32_t *)addr); // Set main stack pointer
SysMemBootJump(); // Jump to bootloader
}
Thank you for any help in advance!
Konstantinos
