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afterburner
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sketch: improve pinmuxing when inactive 

Previously unused pins were always set as output low.
Now, they are output low when active operation is in
progress, and they are set as input when inactive.
This commit is contained in:
ole00 2024-03-31 14:55:32 +01:00
parent 0e99f07370
commit 718a908a9d
1 changed files with 23 additions and 19 deletions
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42
afterburner.ino
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@ -482,6 +482,12 @@ static void setFlagBit(uint8_t flag, uint8_t value) {
}
}
static void setPinMuxUnused(uint8_t pin, uint8_t pm) {
// set to OUTPUT during active GAL operation and to INPUT when GAL is inactive
pinMode(pin, pm);
digitalWrite(pin, LOW);
}
static void setPinMux(uint8_t pm) {
// ensure pull-up is enabled during reading and disabled when inactive on DOUT pin
uint8_t doutMode = pm == OUTPUT ? INPUT_PULLUP: INPUT;
@ -507,11 +513,9 @@ static void setPinMux(uint8_t pm) {
// ensure ZIF10 is Grounded via transistor
digitalWrite(PIN_ZIF_GND_CTRL, pm == OUTPUT ? HIGH: LOW);
//pull down unused pins
pinMode(PIN_ZIF15, pm);
pinMode(PIN_ZIF16, pm);
digitalWrite(PIN_ZIF15, LOW);
digitalWrite(PIN_ZIF16, LOW);
//pull down unused pins when active
setPinMuxUnused(PIN_ZIF15, pm);
setPinMuxUnused(PIN_ZIF16, pm);
break;
case GAL20V8:
@ -525,10 +529,10 @@ static void setPinMux(uint8_t pm) {
// ensure ZIF10 GND pull is disabled
digitalWrite(PIN_ZIF_GND_CTRL, LOW);
//pull down unused pins
digitalWrite(PIN_ZIF14, LOW);
digitalWrite(PIN_ZIF16, LOW);
digitalWrite(PIN_ZIF23, LOW);
//pull down unused pins when active
setPinMuxUnused(PIN_ZIF14, pm);
setPinMuxUnused(PIN_ZIF16, pm);
setPinMuxUnused(PIN_ZIF23, pm);
break;
@ -549,11 +553,11 @@ static void setPinMux(uint8_t pm) {
// ensure ZIF10 GND pull is disabled
digitalWrite(PIN_ZIF_GND_CTRL, LOW);
//pull down unused pins
digitalWrite(PIN_ZIF15, LOW);
digitalWrite(PIN_ZIF16, LOW);
digitalWrite(PIN_ZIF22, LOW);
digitalWrite(PIN_ZIF23, LOW);
//pull down unused pins when active
setPinMuxUnused(PIN_ZIF15, pm);
setPinMuxUnused(PIN_ZIF16, pm);
setPinMuxUnused(PIN_ZIF22, pm);
setPinMuxUnused(PIN_ZIF23, pm);
break;
case GAL6001:
@ -567,11 +571,11 @@ static void setPinMux(uint8_t pm) {
// ensure ZIF10 GND pull is disabled
digitalWrite(PIN_ZIF_GND_CTRL, LOW);
//pull down unused pins
digitalWrite(PIN_ZIF3, LOW);
digitalWrite(PIN_ZIF15, LOW);
digitalWrite(PIN_ZIF16, LOW);
digitalWrite(PIN_ZIF22, LOW);
//pull down unused pins when active
setPinMuxUnused(PIN_ZIF3, pm);
setPinMuxUnused(PIN_ZIF15, pm);
setPinMuxUnused(PIN_ZIF16, pm);
setPinMuxUnused(PIN_ZIF22, pm);
break;
}