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Bootloader using USART 2 on STM32L152VB

Question asked by Edge on Jul 3, 2014
Latest reply on Jul 7, 2014 by Edge
I am attempting to communicate to the bootloader through RS232 on USART 2 on the STM32L152VB.  I have Boot 0 pulled up and I believe I am in the bootloader because the application code is clearly not running.  I am using the IAR Kick Start board which has USART 1 pins dedicated to the LCD display and USART 2 brought out as RS232. I have tried the Flash Load Demonstrator as well as Realterm to send the initial auto baud 0x7f byte to the bootloader.  I get no response.  I was able to make this work on a different eval board for the F1 processor using USART 1.  The manual says that USART 1 or 2 can be used for the L152.  Does the bootloader always listen on both 1 and 2 or do I have to do something special to direct it to USART 2? Thanks.

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