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fix: error handling, timeouts

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This commit is contained in:
Andrey Egorov
2024-09-09 10:31:36 +03:00
parent 7e41196dce
commit 8889e959ee
4 changed files with 209 additions and 159 deletions
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44
pkg/parallel8bit/parallel8bit.go
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@ -9,8 +9,10 @@ import (
)
const (
adressWriteTimeout = 140 * time.Nanosecond
dataStrobeTimeout = 250 * time.Nanosecond // (Data transfer)
adressWriteTimeout = 40 * time.Nanosecond
dataStrobeTimeout = 160 * time.Nanosecond // (Data transfer)
dataReadTimeout = 300 * time.Nanosecond
gapTimeout = 2000 * time.Nanosecond
maxWaitCycles = 100
)
@ -68,7 +70,20 @@ func (d *device) Reset() {
d.PinE.Output()
d.PinRES.Output()
d.busOutput()
d.PinA0.Low()
d.PinRW.Low()
d.PinE.Low()
d.PinDB0.Low()
d.PinDB1.Low()
d.PinDB2.Low()
d.PinDB3.Low()
d.PinDB4.Low()
d.PinDB5.Low()
d.PinDB6.Low()
d.PinDB7.Low()
d.PinE1.Low()
d.PinE2.Low()
d.PinRES.High()
}
func (d *device) WriteByte(b byte, cd rpio.State) {
@ -78,6 +93,7 @@ func (d *device) WriteByte(b byte, cd rpio.State) {
d.PinA0.Write(cd)
// Write bus
d.logger.Printf("Write byte %x\n", b)
d.PinDB0.Write(rpio.State((b >> 0) & 1))
d.PinDB1.Write(rpio.State((b >> 1) & 1))
d.PinDB2.Write(rpio.State((b >> 2) & 1))
@ -99,8 +115,8 @@ func (d *device) WriteByte(b byte, cd rpio.State) {
func (d *device) WriteBytes(b []byte, cd rpio.State) {
// d.logger.Println("Write byte", b, cd, l, r)
d.busOutput()
d.PinRW.Low() // We write
d.PinA0.Write(cd)
d.PinRW.Low() // We write
// Write bus
d.PinDB0.Write(rpio.State(b[0]))
@ -113,24 +129,26 @@ func (d *device) WriteBytes(b []byte, cd rpio.State) {
d.PinDB7.Write(rpio.State(b[7]))
// Strobe start
time.Sleep(adressWriteTimeout)
d.PinE.High()
time.Sleep(dataStrobeTimeout)
// Strobe end
d.PinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
time.Sleep(gapTimeout - dataStrobeTimeout - adressWriteTimeout)
}
func (d *device) ReadByte(cd rpio.State) byte {
// Setup
var b byte
d.busOutput()
d.PinRW.High() // We write
d.busInput()
d.PinA0.Write(cd)
d.PinRW.High() // We read
// Strobe start
time.Sleep(adressWriteTimeout)
d.PinE.High()
time.Sleep(dataStrobeTimeout)
time.Sleep(dataReadTimeout)
// Read
b = uint8(d.PinDB0.Read()) |
@ -144,26 +162,26 @@ func (d *device) ReadByte(cd rpio.State) byte {
// Strobe end
d.PinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
time.Sleep(gapTimeout - dataReadTimeout - adressWriteTimeout)
return b
}
func (d *device) WaitReady() error {
d.busInput() // Set bus to input
d.PinRW.High() // We read
d.PinA0.Low() // Status
d.PinRW.High() // We read
time.Sleep(adressWriteTimeout)
// Strobe start
d.PinE.High()
time.Sleep(dataStrobeTimeout)
time.Sleep(dataReadTimeout)
// Wait status flag drop
ok := false
d.busInput() // Set bus to input
for counter := 0; counter < maxWaitCycles; counter++ {
if d.PinDB7.Read() != rpio.High {
//d.logger.Printf("BUS:%d%d%d%d%d%d%d%d\n", d.pinDB0.Read(), d.pinDB1.Read(), d.pinDB2.Read(), d.pinDB3.Read(), d.pinDB4.Read(), d.pinDB5.Read(), d.pinDB6.Read(), d.pinDB7.Read())
//d.logger.Printf("BUS:%d%d%d%d%d%d%d%d\n", d.PinDB0.Read(), d.PinDB1.Read(), d.PinDB2.Read(), d.PinDB3.Read(), d.PinDB4.Read(), d.PinDB5.Read(), d.PinDB6.Read(), d.PinDB7.Read())
ok = true
break
}
@ -174,12 +192,12 @@ func (d *device) WaitReady() error {
// Strobe end
d.PinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
time.Sleep(gapTimeout - dataReadTimeout - adressWriteTimeout)
// d.logger.Println("Ready")
return nil
}
// Set bus pins to output
// Set bus Pins to output
func (d *device) busOutput() {
// if d.isBusOutput {
// return