platform/move_hub: move port VCC to platform.c

We have a better understanding of what this pin does now, so moving
it to platform.c next to main power pin like other hubs.

Author: dlech

lib/pbio/drv/move_hub/motor.c

@@ -15,13 +15,6 @@
 #include <pbio/config.h>
 
 void _pbdrv_motor_init(void) {
-    // it isn't clear what PB2 does yet, but tacho doesn't work without setting it high.
-    // maybe it switches power to the IR LEDs? plus more?
-
-    // PB2 output, high
-    GPIOB->BSRR = GPIO_BSRR_BS_2;
-    GPIOB->MODER = (GPIOB->MODER & ~GPIO_MODER_MODER2_Msk) | (1 << GPIO_MODER_MODER2_Pos);
-
     // TIM1 provides PWM for ports A/B
     RCC->APB2ENR |= RCC_APB2ENR_TIM1EN;
     TIM1->PSC = 3;      // divide by 4 (= 3 + 1), so ticks are 12MHz

lib/pbio/platform/move_hub/platform.c

@@ -130,6 +130,10 @@ void SystemInit(void) {
     GPIOB->BSRR = GPIO_BSRR_BS_11;
     GPIOB->MODER = (GPIOB->MODER & ~GPIO_MODER_MODER11_Msk) | (1 << GPIO_MODER_MODER11_Pos);
 
+    // PB2 controls I/O port VCC
+    GPIOB->BSRR = GPIO_BSRR_BS_2;
+    GPIOB->MODER = (GPIOB->MODER & ~GPIO_MODER_MODER2_Msk) | (1 << GPIO_MODER_MODER2_Pos);
+
     // not sure what the rest of these pins do
 
     // PF0 output, high