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machine: add KHz, MHz, GHz constants, deprecate TWI_FREQ_* constants

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There are two main issues with these constants:

  * They don't follow the Go naming convention.
  * They call themselves "TWI", while it makes a lot more sense to refer
    to the actual name which is I2C (or I²C).

I have not removed them but just deprecated them. Perhaps we can remove
them when we move towards version 1.0.
This commit is contained in:
Ayke van Laethem
2022-09-16 13:50:48 +02:00
committed by Ron Evans
parent bc946f346d
commit 7513fa2c96
11 changed files with 24 additions and 29 deletions
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src/machine/i2c.go
+2
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@@ -8,6 +8,8 @@ import (
)
// TWI_FREQ is the I2C bus speed. Normally either 100 kHz, or 400 kHz for high-speed bus.
//
// Deprecated: use 100 * machine.KHz or 400 * machine.KHz instead.
const (
TWI_FREQ_100KHZ = 100000
TWI_FREQ_400KHZ = 400000