go-embedded/embd
go-embedded/embd
1
0
Fork 0
mirror of https://github.com/kidoman/embd synced 2024-12-22 12:50:19 +01:00
Code Issues Releases Wiki Activity

pca9685: default the freq to 490 Hz

Browse Source
This commit is contained in:
Karan Misra 2014-01-10 07:36:01 +05:30
parent a80a1701bf
commit 043867e1f5
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
controller/pca9685/pca9685.go
View File

@ -22,6 +22,8 @@ const (
minAnalogValue = 0
maxAnalogValue = 255
defaultFreq = 490
)
// PCA9685 represents a PCA9685 PWM generator.
@ -72,6 +74,9 @@ func (d *PCA9685) setup() (err error) {
return
}
if d.Freq == 0 {
d.Freq = defaultFreq
}
preScaleValue := byte(math.Floor(float64(clockFreq/(pwmControlPoints*d.Freq))+float64(0.5)) - 1)
if d.Debug {
log.Printf("pca9685: calculated prescale value = %#02x", preScaleValue)