FULL tutorial for flashing Espruino into nRF52832 with Raspberry Pi (Zero) using OpenOCD and SWD (two wires)

Update for "rpi1.cfg" if not using the Raspi Zero like me having a Raspi3

      interface bcm2835gpio
     # RPi Zero/v1 interface
     [#bcm2835gpio_peripheral_base](https://forum.espruino.com/search/?q=%23bcm2835gpio_peripheral_base) 0x20000000
     [#bcm2835gpio_speed_coeffs](https://forum.espruino.com/search/?q=%23bcm2835gpio_speed_coeffs) 113714 28

   # Raspi1 BCM2835: (700Mhz)
   [#bcm2835gpio_peripheral_base](https://forum.espruino.com/search/?q=%23bcm2835gpio_peripheral_base) 0x20000000
   [#bcm2835gpio_speed_coeffs](https://forum.espruino.com/search/?q=%23bcm2835gpio_speed_coeffs) 113714 28

   # Raspi2 BCM2836 (900Mhz):
   [#bcm2835gpio_peripheral_base](https://forum.espruino.com/search/?q=%23bcm2835gpio_peripheral_base) 0x3F000000
   [#bcm2835gpio_speed_coeffs](https://forum.espruino.com/search/?q=%23bcm2835gpio_speed_coeffs) 146203 36

   # Raspi3 BCM2837 (1200Mhz):
    bcm2835gpio_peripheral_base 0x3F000000
    bcm2835gpio_speed_coeffs 194938 48

Thanks to @jaolho and @fanoush

OpenOCD fails to connect with cortex processor