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mcp3008: added package and samples for mcp3008 10-bit 8-channel adc

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This commit is contained in:
kunalpowar 2014-05-03 21:35:09 +05:30
parent 42033238e2
commit 59958d7dfc
7 changed files with 163 additions and 4 deletions
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5
host/bbb/bbb.go
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@ -15,6 +15,8 @@ import (
"os"
"strings"
"github.com/golang/glog"
"github.com/kidoman/embd"
"github.com/kidoman/embd/host/generic"
)
@ -97,6 +99,7 @@ var ledMap = embd.LEDMap{
var spiDeviceMinor = byte(1)
func ensureFeatureEnabled(id string) error {
glog.V(3).Infof("bbb: enabling feature %v", id)
pattern := "/sys/devices/bone_capemgr.*/slots"
file, err := embd.FindFirstMatchingFile(pattern)
if err != nil {
@ -108,6 +111,7 @@ func ensureFeatureEnabled(id string) error {
}
str := string(bytes)
if strings.Contains(str, id) {
glog.V(3).Infof("bbb: feature %v already enabled", id)
return nil
}
slots, err := os.OpenFile(file, os.O_WRONLY, os.ModeExclusive)
@ -115,6 +119,7 @@ func ensureFeatureEnabled(id string) error {
return err
}
defer slots.Close()
glog.V(3).Infof("bbb: writing %v to slots file", id)
_, err = slots.WriteString(id)
return err
}