Apparently the changes done in #16277 swapped the values read from the PCA9555 expanders by mistake, which resulted in mixed up matrix columns. Fix the chip and register addresses to match the original code.
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@ -54,9 +54,9 @@ static uint32_t read_cols(void) {
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uint8_t state_1 = 0;
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uint8_t state_1 = 0;
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uint8_t state_2 = 0;
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uint8_t state_2 = 0;
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uint8_t state_3 = 0;
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uint8_t state_3 = 0;
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pca9555_readPins(IC2, PCA9555_PORT0, &state_1);
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pca9555_readPins(IC1, PCA9555_PORT1, &state_1);
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pca9555_readPins(IC2, PCA9555_PORT1, &state_2);
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pca9555_readPins(IC2, PCA9555_PORT0, &state_2);
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pca9555_readPins(IC1, PCA9555_PORT1, &state_3);
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pca9555_readPins(IC2, PCA9555_PORT1, &state_3);
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uint32_t state = ((((uint32_t)state_3 & 0b01111111) << 12) | ((uint32_t)state_2 << 4) | (((uint32_t)state_1 & 0b11110000) >> 4));
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uint32_t state = ((((uint32_t)state_3 & 0b01111111) << 12) | ((uint32_t)state_2 << 4) | (((uint32_t)state_1 & 0b11110000) >> 4));
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return ~state;
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return ~state;
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