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ws2812: add RP2350 support
Adding 150MHz support for the RP2350
1 parent c4ff824 commit 77a59d1

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2 files changed

+361
-1
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2 files changed

+361
-1
lines changed

‎ws2812/ws2812-asm_cortexm.go

Lines changed: 360 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -931,6 +931,356 @@ void ws2812_writeByte125(char c, uint32_t *portSet, uint32_t *portClear, uint32_
931931
[portClear]"m"(*portClear));
932932
}
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__attribute__((always_inline))
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void ws2812_writeByte150(char c, uint32_t *portSet, uint32_t *portClear, uint32_t maskSet, uint32_t maskClear) {
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// Timings:
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// T0H: 53 - 55 cycles or 353.3ns - 366.7ns
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// T1H: 158 - 160 cycles or 1053.3ns - 1066.7ns
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// TLD: 173 - cycles or 1153.3ns -
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uint32_t value = (uint32_t)c << 24;
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char i = 8;
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__asm__ __volatile__(
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"1: @ send_bit\n"
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"\t str %[maskSet], %[portSet] @ [2] T0H and T0L start here\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t lsls %[value], #1 @ [1]\n"
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"\t bcs.n 2f @ [1/3] skip_store\n"
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"\t str %[maskClear], %[portClear] @ [2] T0H -> T0L transition\n"
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"\t2: @ skip_store\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t str %[maskClear], %[portClear] @ [2] T1H -> T1L transition\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t nop\n"
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"\t subs %[i], #1 @ [1]\n"
1273+
"\t beq.n 3f @ [1/3] end\n"
1274+
"\t b 1b @ [1/3] send_bit\n"
1275+
"\t3: @ end\n"
1276+
: [value]"+r"(value),
1277+
[i]"+r"(i)
1278+
: [maskSet]"r"(maskSet),
1279+
[portSet]"m"(*portSet),
1280+
[maskClear]"r"(maskClear),
1281+
[portClear]"m"(*portClear));
1282+
}
1283+
9341284
__attribute__((always_inline))
9351285
void ws2812_writeByte168(char c, uint32_t *portSet, uint32_t *portClear, uint32_t maskSet, uint32_t maskClear) {
9361286
// Timings:
@@ -1832,6 +2182,16 @@ func (d Device) writeByte125(c byte) {
18322182
interrupt.Restore(mask)
18332183
}
18342184

2185+
func (d Device) writeByte150(c byte) {
2186+
portSet, maskSet := d.Pin.PortMaskSet()
2187+
portClear, maskClear := d.Pin.PortMaskClear()
2188+
2189+
mask := interrupt.Disable()
2190+
C.ws2812_writeByte150(C.char(c), (*C.uint32_t)(unsafe.Pointer(portSet)), (*C.uint32_t)(unsafe.Pointer(portClear)), C.uint32_t(maskSet), C.uint32_t(maskClear))
2191+
2192+
interrupt.Restore(mask)
2193+
}
2194+
18352195
func (d Device) writeByte168(c byte) {
18362196
portSet, maskSet := d.Pin.PortMaskSet()
18372197
portClear, maskClear := d.Pin.PortMaskClear()

‎ws2812/ws2812.go

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
// Package ws2812 implements a driver for WS2812 and SK6812 RGB LED strips.
22
package ws2812 // import "tinygo.org/x/drivers/ws2812"
33

4-
//go:generate go run gen-ws2812.go -arch=cortexm 16 48 64 120 125 168 200
4+
//go:generate go run gen-ws2812.go -arch=cortexm 16 48 64 120 125 150 168 200
55
//go:generate go run gen-ws2812.go -arch=tinygoriscv 160 320
66

77
import (

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