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Bootloader not responding

Question asked by goverdovskiy.andrey on Oct 4, 2014
Latest reply on Oct 4, 2014 by goverdovskiy.andrey
I'm using STM8L151G6 in a device. I've erased program and data memory using STVP and set bootloader checks 1 and 2 in option bytes (although as i understand this is not necessary since there is no data at address 0x8000 bootloader should start right away).

So I'm sending synchronisation byte (0x7F) via UART to the device to start code upload, but I'm getting no response. See the pic, channel 1 is device's RX, channel 2 is it's TX.

I've tried resetting the MCU by pulling down the RST pin, that didn't help.

What could be causing the problem?