I was wondering if it was possible to set/change the drive strength of the GPIO pins on the Particle P1? I know that it is possible with the Raspberry Pi by programming the pin’s output current (reference: http://raspberrypi.stackexchange.com/questions/1130/what-is-the-nominal-gpio-pin-output-current/1154#1154)
The reason I want to do this is to reduce the amount of noise on the output of my SPI line. I need my SPI clock speed to be set at 10MHz, however when I probe the data line it is quite noisy (scope capture below). The two alternatives I am currently considering to reduce the noise is to use an external RC filter, or reduce the drive strength of the GPIO.