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74 lines
1.2 KiB
Go
74 lines
1.2 KiB
Go
// Copyright 2021 The Periph Authors. All rights reserved.
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// Use of this source code is governed under the Apache License, Version 2.0
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// that can be found in the LICENSE file.
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package waveshare2in13v2
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import (
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"time"
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"periph.io/x/conn/v3/gpio"
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)
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// errorHandler is a wrapper for error management.
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type errorHandler struct {
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d Dev
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err error
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}
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func (eh *errorHandler) rstOut(l gpio.Level) {
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if eh.err != nil {
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return
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}
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eh.err = eh.d.rst.Out(l)
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}
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func (eh *errorHandler) cTx(w []byte, r []byte) {
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if eh.err != nil {
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return
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}
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eh.err = eh.d.c.Tx(w, r)
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}
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func (eh *errorHandler) dcOut(l gpio.Level) {
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if eh.err != nil {
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return
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}
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eh.err = eh.d.dc.Out(l)
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}
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func (eh *errorHandler) csOut(l gpio.Level) {
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if eh.err != nil {
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return
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}
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eh.err = eh.d.cs.Out(l)
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}
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func (eh *errorHandler) waitUntilIdle() {
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for eh.d.busy.Read() == gpio.High {
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time.Sleep(100 * time.Millisecond)
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}
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}
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func (eh *errorHandler) sendCommand(cmd byte) {
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if eh.err != nil {
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return
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}
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eh.dcOut(gpio.Low)
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eh.csOut(gpio.Low)
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eh.cTx([]byte{cmd}, nil)
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eh.csOut(gpio.High)
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}
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func (eh *errorHandler) sendData(data []byte) {
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if eh.err != nil {
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return
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}
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eh.dcOut(gpio.High)
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eh.csOut(gpio.Low)
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eh.cTx(data, nil)
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eh.csOut(gpio.High)
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}
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