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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_atsamd51.go
+15 -46
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@@ -449,16 +449,20 @@ func (a ADC) getADCChannel() uint8 {
return 6
case PA07:
return 7
case PB00:
return 12
case PB01:
return 13
case PB02:
return 10
return 14
case PB03:
return 11
return 15
case PA09:
return 17
case PA11:
return 19
default:
return 0
panic("Invalid ADC pin")
}
}
@@ -1054,19 +1058,6 @@ func (spi SPI) Transfer(w byte) (byte, error) {
// PWM
const period = 0xFFFF
// 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_)
//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)
}
// Configure configures a PWM pin for output.
func (pwm PWM) Configure() {
// Set pin as output
@@ -1181,34 +1172,6 @@ func (pwm PWM) setPinCfg(val uint8) {
pwm.Pin.setPinCfg(val)
}
// 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
default:
return nil // not supported on this pin
}
}
// setChannel sets the value for the correct channel for PWM on this pin
func (pwm PWM) setChannel(val uint32) {
switch pwm.Pin {
@@ -1232,6 +1195,8 @@ func (pwm PWM) setChannel(val uint32) {
pwm.getTimer().CC[3].Set(val)
case PA22:
pwm.getTimer().CC[2].Set(val)
case PB31:
pwm.getTimer().CC[1].Set(val)
default:
return // not supported on this pin
}
@@ -1260,6 +1225,8 @@ func (pwm PWM) setChannelBuffer(val uint32) {
pwm.getTimer().CCBUF[3].Set(val)
case PA22:
pwm.getTimer().CCBUF[2].Set(val)
case PB31:
pwm.getTimer().CCBUF[1].Set(val)
default:
return // not supported on this pin
}
@@ -1288,6 +1255,8 @@ func (pwm PWM) getMux() PinMode {
return PinPWMG
case PA22:
return PinPWMG
case PB31:
return PinPWMF
default:
return 0 // not supported on this pin
}
@@ -2049,14 +2018,14 @@ func setEPINTENSET(ep uint32, val uint8) {
sam.USB_DEVICE.DEVICE_ENDPOINT[ep].EPINTENSET.Set(val)
}
// ResetProcessor should perform a system reset in preperation
// ResetProcessor should perform a system reset in preparation
// to switch to the bootloader to flash new firmware.
func ResetProcessor() {
arm.DisableInterrupts()
// Perform magic reset into bootloader, as mentioned in
// https://github.com/arduino/ArduinoCore-samd/issues/197
*(*uint32)(unsafe.Pointer(uintptr(0x20000000 + 0x00030000 - 4))) = RESET_MAGIC_VALUE
*(*uint32)(unsafe.Pointer(uintptr(0x20000000 + HSRAM_SIZE - 4))) = RESET_MAGIC_VALUE
arm.SystemReset()
}