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Disable interrupts before sending ws2812 data

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This commit is contained in:
Daniel Bridges
2021-05-30 12:48:08 -07:00
committed by Ron Evans
parent 5645eb3f91
commit 7b565e8cb0
6 changed files with 21 additions and 0 deletions
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ws2812/ws2812_avr.go
+4
View File
@@ -7,6 +7,7 @@ package ws2812
import (
"device/avr"
"machine"
"runtime/interrupt"
)
// Send a single byte using the WS2812 protocol.
@@ -17,6 +18,7 @@ func (d Device) WriteByte(c byte) error {
// Probably this is about pointer registers, which are very limited on AVR.
port, maskSet := d.Pin.PortMaskSet()
_, maskClear := d.Pin.PortMaskClear()
mask := interrupt.Disable()
switch machine.CPUFrequency() {
case 16e6: // 16MHz
@@ -51,8 +53,10 @@ func (d Device) WriteByte(c byte) error {
"maskClear": maskClear,
"portClear": port,
})
interrupt.Restore(mask)
return nil
default:
interrupt.Restore(mask)
return errUnknownClockSpeed
}
}
ws2812/ws2812_m0_16m.go
+3
View File
@@ -7,6 +7,7 @@ package ws2812
import (
"device/arm"
"runtime/interrupt"
)
// Send a single byte using the WS2812 protocol.
@@ -14,6 +15,7 @@ func (d Device) WriteByte(c byte) error {
// For the Cortex-M0 at 16MHz
portSet, maskSet := d.Pin.PortMaskSet()
portClear, maskClear := d.Pin.PortMaskClear()
mask := interrupt.Disable()
// See:
// https://wp.josh.com/2014/05/13/ws2812-neopixels-are-not-so-finicky-once-you-get-to-know-them/
@@ -48,5 +50,6 @@ func (d Device) WriteByte(c byte) error {
"maskClear": maskClear,
"portClear": portClear,
})
interrupt.Restore(mask)
return nil
}
ws2812/ws2812_m0_48m.go
+3
View File
@@ -7,6 +7,7 @@ package ws2812
import (
"device/arm"
"runtime/interrupt"
)
// Send a single byte using the WS2812 protocol.
@@ -14,6 +15,7 @@ func (d Device) WriteByte(c byte) error {
// For the Cortex-M0 at 48MHz
portSet, maskSet := d.Pin.PortMaskSet()
portClear, maskClear := d.Pin.PortMaskClear()
mask := interrupt.Disable()
// See:
// https://wp.josh.com/2014/05/13/ws2812-neopixels-are-not-so-finicky-once-you-get-to-know-them/
@@ -77,5 +79,6 @@ func (d Device) WriteByte(c byte) error {
"maskClear": maskClear,
"portClear": portClear,
})
interrupt.Restore(mask)
return nil
}
ws2812/ws2812_m4_120m.go
+3
View File
@@ -8,6 +8,7 @@ package ws2812
import (
"device/arm"
"runtime/interrupt"
)
// Send a single byte using the WS2812 protocol.
@@ -15,6 +16,7 @@ func (d Device) WriteByte(c byte) error {
// For the Cortex-M4 at 120MHz
portSet, maskSet := d.Pin.PortMaskSet()
portClear, maskClear := d.Pin.PortMaskClear()
mask := interrupt.Disable()
// See:
// https://wp.josh.com/2014/05/13/ws2812-neopixels-are-not-so-finicky-once-you-get-to-know-them/
@@ -169,5 +171,6 @@ func (d Device) WriteByte(c byte) error {
"maskClear": maskClear,
"portClear": portClear,
})
interrupt.Restore(mask)
return nil
}
ws2812/ws2812_m4_64m.go
+3
View File
@@ -7,6 +7,7 @@ package ws2812
import (
"device/arm"
"runtime/interrupt"
)
// Send a single byte using the WS2812 protocol.
@@ -14,6 +15,7 @@ func (d Device) WriteByte(c byte) error {
// For the Cortex-M4 at 64MHz
portSet, maskSet := d.Pin.PortMaskSet()
portClear, maskClear := d.Pin.PortMaskClear()
mask := interrupt.Disable()
// See:
// https://wp.josh.com/2014/05/13/ws2812-neopixels-are-not-so-finicky-once-you-get-to-know-them/
@@ -106,5 +108,6 @@ func (d Device) WriteByte(c byte) error {
"maskClear": maskClear,
"portClear": portClear,
})
interrupt.Restore(mask)
return nil
}
ws2812/ws2812_xtensa.go
+5
View File
@@ -5,12 +5,14 @@ package ws2812
import (
"device"
"machine"
"runtime/interrupt"
"unsafe"
)
func (d Device) WriteByte(c byte) error {
portSet, maskSet := d.Pin.PortMaskSet()
portClear, maskClear := d.Pin.PortMaskClear()
mask := interrupt.Disable()
switch machine.CPUFrequency() {
case 160e6: // 160MHz
@@ -220,6 +222,7 @@ func (d Device) WriteByte(c byte) error {
"maskClear": maskClear,
"portClear": uintptr(unsafe.Pointer(portClear)),
})
interrupt.Restore(mask)
return nil
case 80e6: // 80MHz
// See docs for 160MHz.
@@ -336,8 +339,10 @@ func (d Device) WriteByte(c byte) error {
"maskClear": maskClear,
"portClear": uintptr(unsafe.Pointer(portClear)),
})
interrupt.Restore(mask)
return nil
default:
interrupt.Restore(mask)
return errUnknownClockSpeed
}
}