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Adafruit PyPortal Support (#800)

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* machine/PyPortal: implementation, also includes refinements for other members of samd51x familty.
This commit is contained in:
BCG
2020-01-06 05:53:43 -05:00
committed by Ron Evans
parent 7363bdc298
commit ecff6f8e0c
10 changed files with 387 additions and 47 deletions
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src/machine/machine_atsamd51j19.go
+50
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@@ -6,3 +6,53 @@
// http://ww1.microchip.com/downloads/en/DeviceDoc/60001507C.pdf
//
package machine
import "device/sam"
const HSRAM_SIZE = 0x00030000
// InitPWM initializes the PWM interface.
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.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_CHEN)
sam.GCLK.PCHCTRL[29].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_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 PA18:
return sam.TCC1
case PA19:
return sam.TCC1
case PA20:
return sam.TCC0
case PA21:
return sam.TCC0
case PA23:
return sam.TCC0
case PA22:
return sam.TCC0
case PB31:
return sam.TCC4
default:
return nil // not supported on this pin
}
}