mirror of https://github.com/kidoman/embd
45 lines
687 B
Go
45 lines
687 B
Go
// Generic I²C driver.
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package embd
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import "sync"
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type i2cBusFactory func(byte) I2CBus
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type i2cDriver struct {
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busMap map[byte]I2CBus
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busMapLock sync.Mutex
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ibf i2cBusFactory
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}
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// NewI2CDriver returns a I2CDriver interface which allows control
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// over the I²C subsystem.
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func NewI2CDriver(ibf i2cBusFactory) I2CDriver {
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return &i2cDriver{
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busMap: make(map[byte]I2CBus),
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ibf: ibf,
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}
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}
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func (i *i2cDriver) Bus(l byte) I2CBus {
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i.busMapLock.Lock()
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defer i.busMapLock.Unlock()
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if b, ok := i.busMap[l]; ok {
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return b
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}
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b := i.ibf(l)
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i.busMap[l] = b
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return b
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}
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func (i *i2cDriver) Close() error {
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for _, b := range i.busMap {
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b.Close()
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}
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return nil
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}
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