Apple-2-HW
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Apple2-IO-RPi
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Fix RPi ZW2 data errors + improve speed on ZW1 (#35)

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Terence Boldt 2021-11-05 21:26:48 -04:00 committed by GitHub
parent 5f365e01a6
commit b01d5f3fd1
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 4 deletions
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12
RaspberryPi/apple2driver/a2io/gpio.go
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@ -131,8 +131,9 @@ func (a2 A2Gpio) ReadByte() (byte, error) {
outRead.Out(gpio.Low)
// wait for the Apple II to write
startTime := time.Now()
for inWrite.Read() == gpio.High {
if !inWrite.WaitForEdge(edgeTimeout) {
if time.Since(startTime) > edgeTimeout {
outRead.Out(gpio.High)
return 0, errors.New("timed out reading byte -- write stuck high")
}
@ -181,8 +182,9 @@ func (a2 A2Gpio) ReadByte() (byte, error) {
// wait for the Apple II to finish writing
//fmt.Printf("wait for the Apple II to finish writing\n")
startTime = time.Now()
for inWrite.Read() == gpio.Low {
if !inWrite.WaitForEdge(edgeTimeout) {
if time.Since(startTime) > edgeTimeout {
return 0, errors.New("timed out reading byte -- write stuck low")
}
}
@ -199,8 +201,9 @@ func (a2 A2Gpio) WriteByte(data byte) error {
}
// wait for the Apple II to be ready to read
startTime := time.Now()
for inRead.Read() == gpio.High {
if !inRead.WaitForEdge(edgeTimeout) {
if time.Since(startTime) > edgeTimeout {
outWrite.Out(gpio.High)
return errors.New("timed out writing byte -- read stuck high")
}
@ -260,8 +263,9 @@ func (a2 A2Gpio) WriteByte(data byte) error {
// wait for the Apple II to finsih reading
//fmt.Printf("wait for the Apple II to finsih reading\n")
startTime = time.Now()
for inRead.Read() == gpio.Low {
if !inRead.WaitForEdge(edgeTimeout) {
if time.Since(startTime) > edgeTimeout {
outWrite.Out(gpio.High)
return errors.New("timed out writing byte -- read stuck low")
}