Pulldowns on PWM lines

[catphish]

Just a suggestion for future safety - the lines between the STM32 and the PWM driver have no hardware pull-downs. As a consequence, at least on my board, all PWM lines and hence all 6 FET drivers go high when the chip is not actively driving them during boot.

There was a recorded incident this week of somebody frying their inverter by accidentally flashing with the HV connected, and this could potentially be a problem for anyone not using the drive unit to control their contactors. Some weak pull-downs on those lines would mitigate this.