Thanks Peter. I have made a program to read a string from the UART, then write it again to the UART. I made a function to manipulate values in the pl011 registers (bit flipping the flags inside the registers). The target is to simulate hardware fault injection.
For each run of the program, I made a bit-flip in *only one flag* in *one register*, and I observed the output of the program. *My question is*: where to invoke the call of this fault injection function to cause *the maximum effect* on the program's output? *p.s.* I invoked it once inside pl011_read function, and the program gave a certain output, and I invoked it again in pl011_update, and it gave another output. When I invoked the function in pl011_write, the faults injected had no effect on the output of the program! Do you have an explanation for this behaviour? Thanks in advance. On Wed, Sep 6, 2017 at 2:18 PM, Peter Maydell <peter.mayd...@linaro.org> wrote: > On 6 September 2017 at 13:12, Ramy Sameh <ramysame...@gmail.com> wrote: > > Do the emulated baud rate registers have any effect? (I think they would > > have no effect, because there is no real clock that can be used to > produce > > the baud rate). > > No, they don't have any effect. (In this UART model we don't implement > the feature that you can connect a guest serial port to a host serial > port and have the guest baud rate etc settings propagate through. > We do that in other UART models and maybe one day we'll add it here, > but for now, baud rate settings are ignored.) > > thanks > -- PMM > -- Best Regards, Ramy Sameh Embedded Software Engineer +2-010-172-777-14
