README
¶
Microchip
Package microchip implements drivers for a few SPI controlled IC's produced by Microchip. This package relies on x/exp/io/spi.
MCP3x0x is a family of Analog Digital Converters (ADC). Currently the package contains drivers for the following ADC:
Sample usage:
package main
import (
"fmt"
"golang.org/x/exp/io/spi"
"github.com/advancedclimatesystems/io/spi/microchip"
)
func main() {
conn, err := spi.Open(&spi.Devfs{
Dev: "/dev/spidev32766.0",
Mode: spi.Mode0,
MaxSpeed: 3600000,
})
if err != nil {
panic(fmt.Sprintf("failed to open SPI device: %s", err))
}
defer conn.Close()
adc := microchip.MCP3008{
Conn: conn,
Vref: 5.0,
}
// Read the voltage of channel 3...
v, err := adc.Voltage(3)
if err != nil {
panic(fmt.Sprintf("failed to read channel 3 of MCP3008: %s", err))
}
// ...or read the raw value of channel 3.
c, err := adc.OutputCode(3)
fmt.Printf("channel 3 reads %f Volts or digital output code %d", v, c)
}
Documentation
¶
Overview ¶
Package microchip implements drivers for a few SPI controlled chips produced by Microchip.
Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type MCP3004 ¶
type MCP3004 struct {
Conn *spi.Device
// Vref is the voltage on the reference input of the ADC.
Vref float64
InputType adc.InputType
}
MCP3004 is 10-bits ADC with 4 single-ended or 2 pseudo-differential inputs. Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21295C.pdf
func (MCP3004) OutputCode ¶
OutputCode queries the channel and returns its digital output code.
type MCP3008 ¶
type MCP3008 struct {
Conn *spi.Device
// Vref is the voltage on the reference input of the ADC.
Vref float64
InputType adc.InputType
}
MCP3008 is 10-bits ADC with 8 single-ended or 4 pseudo-differential inputs. Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21295C.pdf
Example ¶
conn, err := spi.Open(&spi.Devfs{
Dev: "/dev/spidev32766.0",
Mode: spi.Mode0,
MaxSpeed: 3600000,
})
if err != nil {
panic(fmt.Sprintf("failed to open SPI device: %s", err))
}
defer conn.Close()
a := MCP3008{
Conn: conn,
Vref: 5.0,
// Optional, default value is SingleEnded.
InputType: adc.SingleEnded,
}
// Voltage the voltage on channel 3.
v, err := a.Voltage(3)
if err != nil {
panic(fmt.Sprintf("failed to read channel 3 of MCP3008: %s", err))
}
fmt.Printf("read %f Volts from channel 3", v)
Output:
func (MCP3008) OutputCode ¶
OutputCode queries the channel and returns its digital output code.
type MCP3204 ¶
type MCP3204 struct {
Conn *spi.Device
// Vref is the voltage on the reference input of the ADC.
Vref float64
InputType adc.InputType
}
MCP3204 is 12-bits ADC with 4 single-ended or 2 pseudo-differential inputs. Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21298e.pdf
func (MCP3204) OutputCode ¶
OutputCode queries the channel and returns its digital output code.
type MCP3208 ¶
type MCP3208 struct {
Conn *spi.Device
// Vref is the voltage on the reference input of the ADC.
Vref float64
InputType adc.InputType
}
MCP3208 is 12-bits ADC with 8 single-ended or 4 pseudo-differential inputs. Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21298e.pdf
func (MCP3208) OutputCode ¶
OutputCode queries the channel and returns its digital output code.
Source Files