go-embedded/embd
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Code Issues Releases Wiki Activity

- use glog instead of Debug flag

Browse source 
- use glog instead of log
- make code conform to the Go code guidelines
This commit is contained in:
Karan Misra 2014-03-31 18:46:04 +05:30
parent ca17879e6e
commit 9ab49745bc
23 changed files with 554 additions and 703 deletions
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60
controller/mcp4725/mcp4725.go
View file

@ -2,8 +2,9 @@
package mcp4725
import (
"log"
"sync"
"github.com/golang/glog"
"github.com/kidoman/embd"
)
@ -25,9 +26,6 @@ type MCP4725 struct {
initialized bool
mu sync.RWMutex
// Debug turns on additional debug output.
Debug bool
}
// New creates a new MCP4725 sensor.
@ -38,33 +36,32 @@ func New(bus embd.I2CBus, addr byte) *MCP4725 {
}
}
func (d *MCP4725) setup() (err error) {
func (d *MCP4725) setup() error {
d.mu.RLock()
if d.initialized {
d.mu.RUnlock()
return
return nil
}
d.mu.RUnlock()
d.mu.Lock()
defer d.mu.Unlock()
if d.Debug {
log.Print("mcp4725: general call reset")
glog.V(1).Infof("mcp4725: general call reset")
if err := d.Bus.WriteByteToReg(d.Addr, 0x00, powerUp); err != nil {
return err
}
if err = d.Bus.WriteByteToReg(d.Addr, 0x00, powerUp); err != nil {
return
}
if err = d.Bus.WriteByteToReg(d.Addr, 0x00, genReset); err != nil {
return
if err := d.Bus.WriteByteToReg(d.Addr, 0x00, genReset); err != nil {
return err
}
d.initialized = true
return
return nil
}
func (d *MCP4725) setVoltage(voltage int, reg byte) (err error) {
if err = d.setup(); err != nil {
return
func (d *MCP4725) setVoltage(voltage int, reg byte) error {
if err := d.setup(); err != nil {
return err
}
if voltage > 4095 {
voltage = 4095
@ -72,33 +69,32 @@ func (d *MCP4725) setVoltage(voltage int, reg byte) (err error) {
if voltage < 0 {
voltage = 0
}
if d.Debug {
log.Printf("mcp4725: setting voltage to %04d", voltage)
glog.V(2).Infof("mcp4725: setting voltage to %04d", voltage)
if err := d.Bus.WriteWordToReg(d.Addr, reg, uint16(voltage<<4)); err != nil {
return err
}
if err = d.Bus.WriteWordToReg(d.Addr, reg, uint16(voltage<<4)); err != nil {
return
}
return
return nil
}
// SetVoltage sets the output voltage.
func (d *MCP4725) SetVoltage(voltage int) (err error) {
func (d *MCP4725) SetVoltage(voltage int) error {
return d.setVoltage(voltage, dacReg)
}
// SetPersistedVoltage sets the voltage and programs the EEPROM so
// that the voltage is restored on reboot.
func (d *MCP4725) SetPersistedVoltage(voltage int) (err error) {
func (d *MCP4725) SetPersistedVoltage(voltage int) error {
return d.setVoltage(voltage, programReg)
}
// Close puts the DAC into power down mode.
func (d *MCP4725) Close() (err error) {
if d.Debug {
log.Print("mcp4725: powering down")
func (d *MCP4725) Close() error {
glog.V(1).Infof("mcp4725: powering down")
if err := d.Bus.WriteWordToReg(d.Addr, powerDown, 0); err != nil {
return err
}
if err = d.Bus.WriteWordToReg(d.Addr, powerDown, 0); err != nil {
return
}
return
return nil
}