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machine/atsamd51x,runtime/atsamd51x: fixes needed for full support for all PWM pins. Also adds some useful constants to clarify peripheral clock usage

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Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2020-08-26 14:04:35 +02:00
committed by Ron Evans
parent ecaf9461ce
commit 58565fa46d
13 changed files with 231 additions and 87 deletions
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src/machine/machine_atsamd51j20.go
+21 -9
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@@ -15,29 +15,29 @@ const HSRAM_SIZE = 0x00040000
func InitPWM() {
// turn on timer clocks used for PWM
sam.MCLK.APBBMASK.SetBits(sam.MCLK_APBBMASK_TCC0_ | sam.MCLK_APBBMASK_TCC1_)
sam.MCLK.APBCMASK.SetBits(sam.MCLK_APBCMASK_TCC2_)
sam.MCLK.APBCMASK.SetBits(sam.MCLK_APBCMASK_TCC2_ | sam.MCLK_APBCMASK_TCC3_)
sam.MCLK.APBDMASK.SetBits(sam.MCLK_APBDMASK_TCC4_)
//use clock generator 0
sam.GCLK.PCHCTRL[25].Set((sam.GCLK_PCHCTRL_GEN_GCLK0 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_TCC0].Set((sam.GCLK_PCHCTRL_GEN_GCLK0 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
sam.GCLK.PCHCTRL[29].Set((sam.GCLK_PCHCTRL_GEN_GCLK0 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_TCC2].Set((sam.GCLK_PCHCTRL_GEN_GCLK0 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
sam.GCLK.PCHCTRL[38].Set((sam.GCLK_PCHCTRL_GEN_GCLK0 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK.PCHCTRL[sam.PCHCTRL_GCLK_TCC4].Set((sam.GCLK_PCHCTRL_GEN_GCLK0 << sam.GCLK_PCHCTRL_GEN_Pos) |
sam.GCLK_PCHCTRL_CHEN)
}
// getTimer returns the timer to be used for PWM on this pin
func (pwm PWM) getTimer() *sam.TCC_Type {
switch pwm.Pin {
case PA16:
return sam.TCC1
case PA17:
return sam.TCC1
case PA14:
return sam.TCC2
case PA15:
return sam.TCC2
case PA16:
return sam.TCC1
case PA17:
return sam.TCC1
case PA18:
return sam.TCC1
case PA19:
@@ -46,9 +46,21 @@ func (pwm PWM) getTimer() *sam.TCC_Type {
return sam.TCC0
case PA21:
return sam.TCC0
case PA22:
return sam.TCC0
case PA23:
return sam.TCC0
case PA22:
case PB12:
return sam.TCC3
case PB13:
return sam.TCC3
case PB14:
return sam.TCC4
case PB15:
return sam.TCC4
case PB16:
return sam.TCC0
case PB17:
return sam.TCC0
case PB31:
return sam.TCC4