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document why do we care about detectHellenMcuType fix #5615

This commit is contained in:
rusefillc 2023-10-17 21:35:36 -04:00
parent 50a758004a
commit 8ddd47c4b8
1 changed files with 0 additions and 43 deletions
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43
firmware/config/boards/hellen/hellen_common.cpp
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@ -66,49 +66,6 @@ void configureHellenCanTerminator() {
}
}
// this should be called before setHellenXXXLedPins()
static void detectHellenMcuType() {
// we test the red LED1 pin because the red LED used has the smallest voltage drop,
// and thus can be detected more accurately
static const brain_pin_e led1Pins[2] = {
// LED1 pin of the 176-pin mcu module (we check it first!)
H176_LED1_RED,
// LED1 pin of the 144-pin mcu module
H144_LED1_RED,
};
int padState[2];
// check each mcu module type sequentially
for (int mcuType = 0; mcuType < 2; mcuType++) {
brain_pin_e ledPin = led1Pins[mcuType];
ioportid_t port = getBrainPinPort(ledPin);
int hwIndex = getBrainPinIndex(ledPin);
// set LED1 pin to output & clear the state (discharge parasitic capacitance)
palSetPadMode(port, hwIndex, PAL_MODE_OUTPUT_PUSHPULL);
palClearPad(port, hwIndex);
// set LED1 pin to input
palSetPadMode(port, hwIndex, PAL_MODE_INPUT); // todo: currently we don't use PAL_MODE_INPUT_PULLDOWN - needs more testing
// wait for the pin state to settle down
chThdSleepMilliseconds(1);
// get the pin states
padState[mcuType] = 1;
for (int i = 0; i < 4; i++) {
// we get "1" only if all readings are "1"
padState[mcuType] &= palReadPad(port, hwIndex);
}
// back to output mode
palSetPadMode(port, hwIndex, PAL_MODE_OUTPUT_PUSHPULL);
}
efiPrintf("Hellen board pin states = %d %d", padState[0], padState[1]);
if (padState[0] && !padState[1]) {
efiPrintf("* Hellen 176-pin mcu detected!");
} else if (!padState[0] && padState[1]) {
efiPrintf("* Hellen 144-pin mcu detected!");
} else {
efiPrintf("* Cannot figure if legacy 144 or 176 Hellen mcu module!");
}
}
void detectHellenBoardType() {
detectHellenMcuType();
engine->engineState.hellenBoardId = detectHellenBoardId();
}