Apple-2-HW/afterburner
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Added support for securing/protecting the GAL

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credits: GALmate software
This commit is contained in:
ole00 2023-03-25 19:40:03 +00:00
parent ba15a74dee
commit 317b3520d8
2 changed files with 47 additions and 4 deletions
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23
afterburner.ino
View File

@ -83,6 +83,7 @@
#define COMMAND_SET_GAL_TYPE 'g'
#define COMMAND_ENABLE_CHECK_TYPE 'f'
#define COMMAND_DISABLE_CHECK_TYPE 'F'
#define COMMAND_ENABLE_SECURITY 's'
#define READGAL 0
#define VERIFYGAL 1
@ -866,14 +867,14 @@ void printPes(char type) {
case GAL16V8: Serial.print(F("GAL16V8 ")); break;
case GAL20V8: Serial.print(F("GAL20V8 ")); break;
case GAL22V10: Serial.print(F("GAL20V10 ")); break;
case ATF16V8B: Serial.print(F("ATF16V8B ")); break;
case ATF16V8B: Serial.print(0 == (flagBits & FLAG_BIT_ATF16V8C) ? F("ATF16V8B "): F("ATF16V8C ")); break;
case ATF22V10B: Serial.print(F("ATF22V10B ")); break;
case ATF22V10C: Serial.print(F("ATF22V10C ")); break;
}
//programming info
if (UNKNOWN != type) {
Serial.print(F(" VPP=")); //without the front space chars the print causes issues (why?)
Serial.print(F(" VPP="));
Serial.print(vpp >> 2, DEC);
Serial.print(F("."));
Serial.print((vpp & 3) * 25, DEC);
@ -1279,6 +1280,17 @@ static void eraseGAL(void)
turnOff();
}
// sets security bit - disables fuse reading
static void secureGAL(void)
{
turnOn(WRITEGAL);
setPV(1);
strobeRow(61, BIT_ONE); // strobe row and send one bit with value 1
setPV(0);
turnOff();
}
static char checkGalTypeViaPes(void)
{
@ -1669,6 +1681,13 @@ void loop() {
}
} break;
// sets the security bit
case COMMAND_ENABLE_SECURITY: {
if (doTypeCheck()) {
secureGAL();
}
} break;
// toggles terminal echo
case COMMAND_ECHO : {
echoEnabled = 1 - echoEnabled;

28
src_pc/afterburner.c
View File

@ -117,6 +117,7 @@ char opErase = 0;
char opInfo = 0;
char opVerify = 0;
char opTestVPP = 0;
char opSecureGal = 0;
static int waitForSerialPrompt(char* buf, int bufSize, int maxDelay);
@ -141,6 +142,7 @@ static void printHelp() {
printf(" -d <serial_device> : name of the serial device. Default is: %s\n", DEFAULT_SERIAL_DEVICE_NAME);
printf(" serial params are: 38400, 8N1\n");
printf(" -nc : do not check device GAL type before operation: force the GAL type set on command line\n");
printf(" -sec: enable security - protect the chip. Use with 'w' or 'v' commands.\n");
printf("examples:\n");
printf(" afterburner i -t ATF16V8B : reads and prints the device info\n");
printf(" afterburner r -t ATF16V8B : reads the fuse map from the GAL chip and displays it\n");
@ -151,7 +153,7 @@ static void printHelp() {
printf(" of the chip. If the programing voltage is unknown use 10V.\n");
printf(" - known VPP voltages as tested on Afterburner with Arduino UNO: \n");
printf(" Lattice GAL16V8D, GAL22V10D: 12V \n");
printf(" Atmel ATF16V8D, ATF22V10C: 10V \n");
printf(" Atmel ATF16V8B, AFT16V8C, ATF22V10C: 10V \n");
}
static char checkArgs(int argc, char** argv) {
@ -176,7 +178,10 @@ static char checkArgs(int argc, char** argv) {
deviceName = argv[i];
} else if (strcmp("-nc", param) == 0) {
noGalCheck = 1;
} else if (param[0] != '-') {
} else if (strcmp("-sec", param) == 0) {
opSecureGal = 1;
}
else if (param[0] != '-') {
modes = param;
}
}
@ -844,6 +849,20 @@ static char operationSetGalType(Galtype type) {
return result;
}
static char operationSecureGal() {
int readSize;
char result;
if (openSerial() != 0) {
return -1;
}
if (verbose) {
printf("sending 's' command...\n");
}
result = sendGenericCommand("s\r", "secure GAL failed ?", 4000, 0);
closeSerial();
return result;
}
static char operationEraseGal(void) {
char buf[MAX_LINE];
@ -947,6 +966,11 @@ int main(int argc, char** argv) {
} else if (opTestVPP) {
result = operationTestVpp();
}
if (0 == result && (opWrite || opVerify)) {
if (opSecureGal) {
operationSecureGal();
}
}
}
if (verbose) {