1// +build sam,atsamd21 arduino_nano33 circuitplay_express 2 3package machine 4 5// Return the current CPU frequency in hertz. 6func CPUFrequency() uint32 { 7 return 48000000 8} 9 10// Hardware pins 11const ( 12 PA00 Pin = 0 13 PA01 Pin = 1 14 PA02 Pin = 2 15 PA03 Pin = 3 16 PA04 Pin = 4 17 PA05 Pin = 5 18 PA06 Pin = 6 19 PA07 Pin = 7 20 PA08 Pin = 8 21 PA09 Pin = 9 22 PA10 Pin = 10 23 PA11 Pin = 11 24 PA12 Pin = 12 25 PA13 Pin = 13 26 PA14 Pin = 14 27 PA15 Pin = 15 28 PA16 Pin = 16 29 PA17 Pin = 17 30 PA18 Pin = 18 31 PA19 Pin = 19 32 PA20 Pin = 20 33 PA21 Pin = 21 34 PA22 Pin = 22 35 PA23 Pin = 23 36 PA24 Pin = 24 37 PA25 Pin = 25 38 PA26 Pin = 26 39 PA27 Pin = 27 40 PA28 Pin = 28 41 PA29 Pin = 29 42 PA30 Pin = 30 43 PA31 Pin = 31 44 PB00 Pin = 32 45 PB01 Pin = 33 46 PB02 Pin = 34 47 PB03 Pin = 35 48 PB04 Pin = 36 49 PB05 Pin = 37 50 PB06 Pin = 38 51 PB07 Pin = 39 52 PB08 Pin = 40 53 PB09 Pin = 41 54 PB10 Pin = 42 55 PB11 Pin = 43 56 PB12 Pin = 44 57 PB13 Pin = 45 58 PB14 Pin = 46 59 PB15 Pin = 47 60 PB16 Pin = 48 61 PB17 Pin = 49 62 PB18 Pin = 50 63 PB19 Pin = 51 64 PB20 Pin = 52 65 PB21 Pin = 53 66 PB22 Pin = 54 67 PB23 Pin = 55 68 PB24 Pin = 56 69 PB25 Pin = 57 70 PB26 Pin = 58 71 PB27 Pin = 59 72 PB28 Pin = 60 73 PB29 Pin = 61 74 PB30 Pin = 62 75 PB31 Pin = 63 76) 77