mirror of https://github.com/kidoman/embd
65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
/*
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* Copyright (c) Kunal Powar 2014
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
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* associated documentation files (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge, publish, distribute,
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* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
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* NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package embd
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import "sync"
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type spiBusFactory func(int, byte, byte, int, int, int, func() error) SPIBus
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type spiDriver struct {
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spiDevMinor int
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initializer func() error
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busMap map[byte]SPIBus
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busMapLock sync.Mutex
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sbf spiBusFactory
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}
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// NewSPIDriver returns a SPIDriver interface which allows control
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// over the SPI bus.
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func NewSPIDriver(spiDevMinor int, sbf spiBusFactory, i func() error) SPIDriver {
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return &spiDriver{
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spiDevMinor: spiDevMinor,
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sbf: sbf,
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initializer: i,
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}
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}
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// Bus returns a SPIBus interface which allows us to use spi functionalities
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func (s *spiDriver) Bus(mode, channel byte, speed, bpw, delay int) SPIBus {
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s.busMapLock.Lock()
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defer s.busMapLock.Unlock()
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b := s.sbf(s.spiDevMinor, mode, channel, speed, bpw, delay, s.initializer)
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s.busMap = make(map[byte]SPIBus)
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s.busMap[channel] = b
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return b
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}
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// Close cleans up all the initialized SPIbus
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func (s *spiDriver) Close() error {
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for _, b := range s.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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