Hi all,
I am developing custom bootloader for STM32F765VG and i have a problem with application's peripheral init which explained below.
Bootloader uses LL drivers , applications use HAL drivers.
My first application code just toggles a led and only uses gpio periperhal. bootloader jumps perfectly application and i can see led toggles.
In my second application code unlike the first application code i just enable USART1 peripheral. When i try to enable USART1 , my bootloader code stucks in LL_RCC_GetUARTClockFreq function.
Here is bootloader code.
LL_USART_DeInit(BL_USART_CHANNEL);
LL_USART_Disable(BL_USART_CHANNEL);
LL_I2C_DisableIT_STOP(I2C3DEV_I2C);
LL_DMA_DisableIT_TC(I2C3DEV_DMA, I2C3DEV_DMA_TX_STREAM);
LL_DMA_DisableIT_TC(I2C3DEV_DMA, I2C3DEV_DMA_RX_STREAM);
LL_I2C_DisableDMAReq_TX(I2C3DEV_I2C);
LL_I2C_DisableDMAReq_RX(I2C3DEV_I2C);
LL_I2C_Disable(I2C3DEV_I2C);
LL_RCC_DeInit();
LL_EXTI_DeInit();
LL_EXTI_DisableIT_0_31(LL_EXTI_LINE_ALL_0_31);
SysTick->CTRL = 0;
SysTick->LOAD = 0;
SysTick->VAL = 0;
// 1- Get the application stack pointer (First entry in the application vector table)
appStack = (uint32_t) *((__IO uint32_t *)APPLICATION_ADDR);
// 2- Get the application entry point (Second entry in the application vector table)
appEntry = (pFunc) *(__IO uint32_t *) (APPLICATION_ADDR+4);
// 3- Reconfigure vector table offset register to match the application location
SCB->VTOR = APPLICATION_ADDR;
// 4- Set the application stack pointer
__set_MSP(appStack);
// 5- jump to application
appEntry();
Regards
Baris
