From 938a071c1ad1f5a4eb5a0cfa06cf8ab3831aecac Mon Sep 17 00:00:00 2001 From: Thorsten von Eicken Date: Fri, 26 Aug 2016 23:02:11 -0700 Subject: [PATCH] add minimal support for NextThing CHIP, part 2 --- host/chip/chip.go | 68 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 host/chip/chip.go diff --git a/host/chip/chip.go b/host/chip/chip.go new file mode 100644 index 0000000..e7b541a --- /dev/null +++ b/host/chip/chip.go @@ -0,0 +1,68 @@ +// Copyright 2016 by Thorsten von Eicken + +// Package chip provides NextThing C.H.I.P. support. +// References: +// http://docs.getchip.com/chip.html#chip-hardware +// http://www.chip-community.org/index.php/Hardware_Information +// +// The following features are supported on Linux kernel 4.4+ +// GPIO (digital (rw)) +// I²C +// SPI +// Could add LED support by following https://bbs.nextthing.co/t/pwr-and-stat-leds/748/5 + +package chip + +import ( + "github.com/kidoman/embd" + "github.com/kidoman/embd/host/generic" +) + +var spiDeviceMinor = byte(0) + +var chipPins = embd.PinMap{ + &embd.PinDesc{"XIO-P0", []string{"1016", "0", "gpio0"}, embd.CapDigital, 1016, 0}, + &embd.PinDesc{"XIO-P6", []string{"1022", "6", "gpio6"}, embd.CapDigital, 1022, 0}, + /* + &embd.PinDesc{ID: "P1_3", Aliases: []string{"0", "GPIO_0", "SDA", "I2C0_SDA"}, Caps: embd.CapDigital | embd.CapI2C, DigitalLogical: 0}, + &embd.PinDesc{ID: "P1_5", Aliases: []string{"1", "GPIO_1", "SCL", "I2C0_SCL"}, Caps: embd.CapDigital | embd.CapI2C, DigitalLogical: 1}, + &embd.PinDesc{ID: "P1_7", Aliases: []string{"4", "GPIO_4", "GPCLK0"}, Caps: embd.CapDigital, DigitalLogical: 4}, + &embd.PinDesc{ID: "P1_8", Aliases: []string{"14", "GPIO_14", "TXD", "UART0_TXD"}, Caps: embd.CapDigital | embd.CapUART, DigitalLogical: 14}, + &embd.PinDesc{ID: "P1_10", Aliases: []string{"15", "GPIO_15", "RXD", "UART0_RXD"}, Caps: embd.CapDigital | embd.CapUART, DigitalLogical: 15}, + &embd.PinDesc{ID: "P1_11", Aliases: []string{"17", "GPIO_17"}, Caps: embd.CapDigital, DigitalLogical: 17}, + &embd.PinDesc{ID: "P1_12", Aliases: []string{"18", "GPIO_18", "PCM_CLK"}, Caps: embd.CapDigital, DigitalLogical: 18}, + &embd.PinDesc{ID: "P1_13", Aliases: []string{"21", "GPIO_21"}, Caps: embd.CapDigital, DigitalLogical: 21}, + &embd.PinDesc{ID: "P1_15", Aliases: []string{"22", "GPIO_22"}, Caps: embd.CapDigital, DigitalLogical: 22}, + &embd.PinDesc{ID: "P1_16", Aliases: []string{"23", "GPIO_23"}, Caps: embd.CapDigital, DigitalLogical: 23}, + &embd.PinDesc{ID: "P1_18", Aliases: []string{"24", "GPIO_24"}, Caps: embd.CapDigital, DigitalLogical: 24}, + &embd.PinDesc{ID: "P1_19", Aliases: []string{"10", "GPIO_10", "MOSI", "SPI0_MOSI"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 10}, + &embd.PinDesc{ID: "P1_21", Aliases: []string{"9", "GPIO_9", "MISO", "SPI0_MISO"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 9}, + &embd.PinDesc{ID: "P1_22", Aliases: []string{"25", "GPIO_25"}, Caps: embd.CapDigital, DigitalLogical: 25}, + &embd.PinDesc{ID: "P1_23", Aliases: []string{"11", "GPIO_11", "SCLK", "SPI0_SCLK"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 11}, + &embd.PinDesc{ID: "P1_24", Aliases: []string{"8", "GPIO_8", "CE0", "SPI0_CE0_N"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 8}, + &embd.PinDesc{ID: "P1_26", Aliases: []string{"7", "GPIO_7", "CE1", "SPI0_CE1_N"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 7}, + */ +} + +var ledMap = embd.LEDMap{ + "led0": []string{"0", "led0", "LED0"}, +} + +func init() { + embd.Register(embd.HostCHIP, func(rev int) *embd.Descriptor { + return &embd.Descriptor{ + GPIODriver: func() embd.GPIODriver { + return embd.NewGPIODriver(chipPins, generic.NewDigitalPin, nil, nil) + }, + I2CDriver: func() embd.I2CDriver { + return embd.NewI2CDriver(generic.NewI2CBus) + }, + LEDDriver: func() embd.LEDDriver { + return embd.NewLEDDriver(ledMap, generic.NewLED) + }, + SPIDriver: func() embd.SPIDriver { + return embd.NewSPIDriver(spiDeviceMinor, generic.NewSPIBus, nil) + }, + } + }) +}