i2csoft: add support for software I2C

2026-08-20 14:39:00 +00:00 · 2021-09-22 23:31:02 +09:00
parent 94729a4f7d
commit bd42656644
7 changed files with 396 additions and 1 deletions
@@ -0,0 +1,22 @@
+//go:build !esp32 && !atsamd51 && !atsame5x
+// +build !esp32,!atsamd51,!atsame5x
+
+package i2csoft
+
+import (
+	"device"
+)
+
+func (i2c *I2C) wait() {
+	// atsamd21 @ 48MHz
+	//  1 : about 360kHz
+	// 24 : about 96kHz
+	wait := 1
+	if i2c.baudrate < 400*1e3 {
+		wait = 19
+	}
+
+	for i := 0; i < wait; i++ {
+		device.Asm(`nop`)
+	}
+}