Quote:
Originally Posted by stmilosh
So to conclude, all this talk about new faster processors and quicker map updates in real time is just marketing BS.
P.S. For example Racechip One and Racechip Pro 2 are 100% identical PCB's with all the same components, the only difference been that Racechip Pro 2 has exactly same type (ST8M) of 24MHz mcu instead of 16 MHz mcu that Racechip One has (not 8MHz as they say in their advertisements). Racechip Ultimate has faster ARM Cortex M3, but uses exactly the same maps (32kB) so no difference there at all.
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Moreover, what I discovered is that none of the used chips (exact ones used are: STM8S105K6 for Racechip One, STM8S207K6 for Racechip Pro 2 and
STM32F102C6 for Racechip Ultimate) has DAC and in all of them the generation of analog signal is done in the same way - 16b timer PWM output fed through low-pass filter. Due to the need to minimize the ripple from PWM, this is limited by the time constant of the low-pass filter which is couple of ms. Therefore, actual speed of ADC and calculation/look-up in the chip has no impact at all. They could have employed the chip with internal DAC or external fast DAC (these components cost 1-2$ only), but they've opted out for the slowest solution.
