Apple-2-HW/afterburner
2
0
Fork 1
mirror of https://github.com/ole00/afterburner.git synced 2024-06-26 00:29:26 +00:00
Code Issues Projects Releases Wiki Activity

ensure GPIOs are set to Input when not active

Browse Source 
This should prevent accidental damage of the GAL chip
during insertion into the socket.
This commit is contained in:
ole00 2023-01-24 20:17:49 +00:00
parent ed14f825a5
commit ae955a8b6b
1 changed files with 26 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
afterburner.ino
View File

@ -250,6 +250,24 @@ void printHelp(char full) {
Serial.println(F(" t - test VPP")); Serial.println(F(" t - test VPP"));
} }
static void setupGpios(uint8_t pm) {
// Serial input of the GAL chip, output from Arduino
pinMode(PIN_SDIN, pm);
pinMode(PIN_STROBE, pm);
pinMode(PIN_PV, pm);
pinMode(PIN_RA0, pm);
pinMode(PIN_RA1, pm);
pinMode(PIN_RA2, pm);
pinMode(PIN_RA3, pm);
pinMode(PIN_RA4, pm);
pinMode(PIN_RA5, pm);
pinMode(PIN_SCLK, pm);
pinMode(PIN_VPP, pm);
}
// setup the Arduino board // setup the Arduino board
void setup() { void setup() {
// initialize serial: // initialize serial:
@ -259,27 +277,13 @@ void setup() {
echoEnabled = 0; echoEnabled = 0;
mapUploaded = 0; mapUploaded = 0;
typeCheck = 1; //do type check typeCheck = 1; //do type check
lineIndex = 0;
// Serial output from the GAL chip, input for Arduino // Serial output from the GAL chip, input for Arduino
pinMode(PIN_SDOUT, INPUT); pinMode(PIN_SDOUT, INPUT);
// Serial input of the GAL chip, output from Arduino
pinMode(PIN_SDIN, OUTPUT);
pinMode(PIN_STROBE, OUTPUT); // Set all GPIO pins to Input to prevent accidents when
pinMode(PIN_PV, OUTPUT); // inserting the GAL IC into socket.
pinMode(PIN_RA0, OUTPUT); setupGpios(INPUT);
pinMode(PIN_RA1, OUTPUT);
pinMode(PIN_RA2, OUTPUT);
pinMode(PIN_RA3, OUTPUT);
pinMode(PIN_RA4, OUTPUT);
pinMode(PIN_RA5, OUTPUT);
pinMode(PIN_SCLK, OUTPUT);
pinMode(PIN_VPP, OUTPUT);
// Important - the output pins should be kept high.
// TurnOff function does that (keeps pin high).
turnOff();
printHelp(0); printHelp(0);
Serial.println(">"); Serial.println(">");
@ -539,11 +543,12 @@ static void turnOff(void)
delay(2); delay(2);
setVCC(0); // turn off VCC (if controlled) setVCC(0); // turn off VCC (if controlled)
setupGpios(INPUT);
} }
// GAL init sequence // GAL init sequence
static void turnOn(char mode) { static void turnOn(char mode) {
setupGpios(OUTPUT);
if ( if (
mode == WRITEGAL || mode == WRITEGAL ||
@ -1443,11 +1448,14 @@ static void printNoFusesError() {
static void testVoltage(int seconds) { static void testVoltage(int seconds) {
int i; int i;
pinMode(PIN_VPP, OUTPUT);
setVPP(1); setVPP(1);
for (i = 0 ; i < seconds; i++) { for (i = 0 ; i < seconds; i++) {
delay(1000); delay(1000);
} }
setVPP(0); setVPP(0);
pinMode(PIN_VPP, INPUT);
} }