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Instead of scanning the keyboard matrix from the main loop and utilizing busy loops, try to use a PIT interrupt handler to do the same thing, scanning one row per interrupt call without busy loops.

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For some reason, this makes the movement of the mouse pointer very slow and makes it jump from time to time, so I ended up adding INTERRUPT_KEY_SCANNER and disabling the timer interrupt.
Also double bufferred the mouse report just like the others. Unfortunately this does not affect this issue.
This commit is contained in:
László Monda
2017-11-02 01:11:41 +01:00
parent 024f24f489
commit 00dfd96d55
15 changed files with 157 additions and 43 deletions
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23
shared/key_matrix.c
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@@ -34,6 +34,27 @@ void KeyMatrix_Scan(key_matrix_t *keyMatrix)
}
GPIO_WritePinOutput(rowGpio, rowPin, 0);
for (volatile uint32_t i=0; i<100; i++); // Wait for the new port state to settle. This avoid bogus key state detection.
for (volatile uint32_t i=0; i<100; i++); // Wait for the new port state to settle. This avoids bogus key state detection.
}
}
void KeyMatrix_ScanRow(key_matrix_t *keyMatrix)
{
uint8_t *keyState = keyMatrix->keyStates + keyMatrix->currentRowNum * keyMatrix->colNum;
key_matrix_pin_t *row = keyMatrix->rows + keyMatrix->currentRowNum;
GPIO_Type *rowGpio = row->gpio;
uint32_t rowPin = row->pin;
GPIO_WritePinOutput(rowGpio, rowPin, 1);
key_matrix_pin_t *colEnd = keyMatrix->cols + keyMatrix->colNum;
for (key_matrix_pin_t *col = keyMatrix->cols; col<colEnd; col++) {
*(keyState++) = GPIO_ReadPinInput(col->gpio, col->pin);
}
GPIO_WritePinOutput(rowGpio, rowPin, 0);
if (++keyMatrix->currentRowNum >= keyMatrix->rowNum) {
keyMatrix->currentRowNum = 0;
}
}