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Ayke van Laethem
aa5b8d0df7
This means that machine.UART0, machine.UART1, etc are of type *machine.UART, not machine.UART. This makes them easier to pass around and avoids surprises when they are passed around by value while they should be passed around by reference. There is a small code size impact in some cases, but it is relatively minor.
50 lines
748 B
Go
50 lines
748 B
Go
// +build sam,atsamd21,circuitplay_express
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package machine
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import (
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"device/sam"
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"runtime/interrupt"
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)
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// UART1 on the Circuit Playground Express.
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var (
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UART1 = &_UART1
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_UART1 = UART{
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Buffer: NewRingBuffer(),
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Bus: sam.SERCOM4_USART,
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SERCOM: 4,
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}
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)
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func init() {
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UART1.Interrupt = interrupt.New(sam.IRQ_SERCOM4, _UART1.handleInterrupt)
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}
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// I2C on the Circuit Playground Express.
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var (
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// external device
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I2C0 = &I2C{
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Bus: sam.SERCOM5_I2CM,
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SERCOM: 5,
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}
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// internal device
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I2C1 = &I2C{
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Bus: sam.SERCOM1_I2CM,
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SERCOM: 1,
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}
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)
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// SPI on the Circuit Playground Express.
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var (
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SPI0 = SPI{
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Bus: sam.SERCOM3_SPI,
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SERCOM: 3,
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}
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)
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// I2S on the Circuit Playground Express.
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var (
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I2S0 = I2S{Bus: sam.I2S}
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)
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