mirror of
https://github.com/kidoman/embd
synced 2024-12-22 12:50:19 +01:00
9401acd013
added a function to determine the revision of the pi the program is running on from "Revision" field in /proc/cpuinfo, also made the rev2 gpio pinmap the default
85 lines
5.2 KiB
Go
85 lines
5.2 KiB
Go
/*
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Package rpi provides Raspberry Pi support.
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The following features are supported on Linux kernel 3.8+
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GPIO (digital (rw))
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I²C
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LED
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*/
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package rpi
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import (
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"github.com/kidoman/embd"
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"github.com/kidoman/embd/host/generic"
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)
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var spiDeviceMinor = byte(0)
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var rev1Pins = embd.PinMap{
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&embd.PinDesc{ID: "P1_3", Aliases: []string{"0", "GPIO_0", "SDA", "I2C0_SDA"}, Caps: embd.CapDigital | embd.CapI2C, DigitalLogical: 0},
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&embd.PinDesc{ID: "P1_5", Aliases: []string{"1", "GPIO_1", "SCL", "I2C0_SCL"}, Caps: embd.CapDigital | embd.CapI2C, DigitalLogical: 1},
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&embd.PinDesc{ID: "P1_7", Aliases: []string{"4", "GPIO_4", "GPCLK0"}, Caps: embd.CapDigital, DigitalLogical: 4},
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&embd.PinDesc{ID: "P1_8", Aliases: []string{"14", "GPIO_14", "TXD", "UART0_TXD"}, Caps: embd.CapDigital | embd.CapUART, DigitalLogical: 14},
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&embd.PinDesc{ID: "P1_10", Aliases: []string{"15", "GPIO_15", "RXD", "UART0_RXD"}, Caps: embd.CapDigital | embd.CapUART, DigitalLogical: 15},
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&embd.PinDesc{ID: "P1_11", Aliases: []string{"17", "GPIO_17"}, Caps: embd.CapDigital, DigitalLogical: 17},
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&embd.PinDesc{ID: "P1_12", Aliases: []string{"18", "GPIO_18", "PCM_CLK"}, Caps: embd.CapDigital, DigitalLogical: 18},
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&embd.PinDesc{ID: "P1_13", Aliases: []string{"21", "GPIO_21"}, Caps: embd.CapDigital, DigitalLogical: 21},
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&embd.PinDesc{ID: "P1_15", Aliases: []string{"22", "GPIO_22"}, Caps: embd.CapDigital, DigitalLogical: 22},
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&embd.PinDesc{ID: "P1_16", Aliases: []string{"23", "GPIO_23"}, Caps: embd.CapDigital, DigitalLogical: 23},
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&embd.PinDesc{ID: "P1_18", Aliases: []string{"24", "GPIO_24"}, Caps: embd.CapDigital, DigitalLogical: 24},
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&embd.PinDesc{ID: "P1_19", Aliases: []string{"10", "GPIO_10", "MOSI", "SPI0_MOSI"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 10},
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&embd.PinDesc{ID: "P1_21", Aliases: []string{"9", "GPIO_9", "MISO", "SPI0_MISO"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 9},
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&embd.PinDesc{ID: "P1_22", Aliases: []string{"25", "GPIO_25"}, Caps: embd.CapDigital, DigitalLogical: 25},
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&embd.PinDesc{ID: "P1_23", Aliases: []string{"11", "GPIO_11", "SCLK", "SPI0_SCLK"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 11},
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&embd.PinDesc{ID: "P1_24", Aliases: []string{"8", "GPIO_8", "CE0", "SPI0_CE0_N"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 8},
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&embd.PinDesc{ID: "P1_26", Aliases: []string{"7", "GPIO_7", "CE1", "SPI0_CE1_N"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 7},
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}
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var rev2Pins = embd.PinMap{
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&embd.PinDesc{ID: "P1_3", Aliases: []string{"2", "GPIO_2", "SDA", "I2C1_SDA"}, Caps: embd.CapDigital | embd.CapI2C, DigitalLogical: 2},
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&embd.PinDesc{ID: "P1_5", Aliases: []string{"3", "GPIO_3", "SCL", "I2C1_SCL"}, Caps: embd.CapDigital | embd.CapI2C, DigitalLogical: 3},
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&embd.PinDesc{ID: "P1_7", Aliases: []string{"4", "GPIO_4", "GPCLK0"}, Caps: embd.CapDigital, DigitalLogical: 4},
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&embd.PinDesc{ID: "P1_8", Aliases: []string{"14", "GPIO_14", "TXD", "UART0_TXD"}, Caps: embd.CapDigital | embd.CapUART, DigitalLogical: 14},
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&embd.PinDesc{ID: "P1_10", Aliases: []string{"15", "GPIO_15", "RXD", "UART0_RXD"}, Caps: embd.CapDigital | embd.CapUART, DigitalLogical: 15},
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&embd.PinDesc{ID: "P1_11", Aliases: []string{"17", "GPIO_17"}, Caps: embd.CapDigital, DigitalLogical: 17},
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&embd.PinDesc{ID: "P1_12", Aliases: []string{"18", "GPIO_18", "PCM_CLK"}, Caps: embd.CapDigital, DigitalLogical: 18},
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&embd.PinDesc{ID: "P1_13", Aliases: []string{"27", "GPIO_27"}, Caps: embd.CapDigital, DigitalLogical: 27},
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&embd.PinDesc{ID: "P1_15", Aliases: []string{"22", "GPIO_22"}, Caps: embd.CapDigital, DigitalLogical: 22},
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&embd.PinDesc{ID: "P1_16", Aliases: []string{"23", "GPIO_23"}, Caps: embd.CapDigital, DigitalLogical: 23},
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&embd.PinDesc{ID: "P1_18", Aliases: []string{"24", "GPIO_24"}, Caps: embd.CapDigital, DigitalLogical: 24},
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&embd.PinDesc{ID: "P1_19", Aliases: []string{"10", "GPIO_10", "MOSI", "SPI0_MOSI"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 10},
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&embd.PinDesc{ID: "P1_21", Aliases: []string{"9", "GPIO_9", "MISO", "SPI0_MISO"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 9},
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&embd.PinDesc{ID: "P1_22", Aliases: []string{"25", "GPIO_25"}, Caps: embd.CapDigital, DigitalLogical: 25},
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&embd.PinDesc{ID: "P1_23", Aliases: []string{"11", "GPIO_11", "SCLK", "SPI0_SCLK"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 11},
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&embd.PinDesc{ID: "P1_24", Aliases: []string{"8", "GPIO_8", "CE0", "SPI0_CE0_N"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 8},
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&embd.PinDesc{ID: "P1_26", Aliases: []string{"7", "GPIO_7", "CE1", "SPI0_CE1_N"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 7},
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}
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var ledMap = embd.LEDMap{
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"led0": []string{"0", "led0", "LED0"},
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}
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func init() {
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embd.Register(embd.HostRPi, func(rev int) *embd.Descriptor {
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var pins = rev2Pins
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if rev < 4 {
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pins = rev1Pins
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}
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return &embd.Descriptor{
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GPIODriver: func() embd.GPIODriver {
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return embd.NewGPIODriver(pins, generic.NewDigitalPin, nil, nil)
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},
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I2CDriver: func() embd.I2CDriver {
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return embd.NewI2CDriver(generic.NewI2CBus)
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},
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LEDDriver: func() embd.LEDDriver {
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return embd.NewLEDDriver(ledMap, generic.NewLED)
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},
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SPIDriver: func() embd.SPIDriver {
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return embd.NewSPIDriver(spiDeviceMinor, generic.NewSPIBus, nil)
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},
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}
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})
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}
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