Adapt various input devices to various output devices.
https://github.com/OpenRetroPad/OpenRetroPad
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548 lines
21 KiB
548 lines
21 KiB
/* |
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Copyright (c) 2014-present PlatformIO <contact@platformio.org> |
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Licensed under the Apache License, Version 2.0 (the "License"); |
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you may not use this file except in compliance with the License. |
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You may obtain a copy of the License at |
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http://www.apache.org/licenses/LICENSE-2.0 |
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Unless required by applicable law or agreed to in writing, software |
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distributed under the License is distributed on an "AS IS" BASIS, |
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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See the License for the specific language governing permissions and |
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limitations under the License. |
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**/ |
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#include <cstdio> |
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#include <unity.h> |
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#define DATA_SIZE 800 // number of sample points to poll |
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// buffer to hold data being read from controller |
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bool buffer[DATA_SIZE]; |
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#define NUM_BITS 32 |
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// bit resolution and offsets |
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int bitOffsets[NUM_BITS]; |
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int bitResolution = 0; |
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int bitsToRead = DATA_SIZE; |
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bool returnedBits[NUM_BITS]; |
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struct ControllerData { |
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bool buttonA; |
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bool buttonB; |
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bool buttonZ; |
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bool buttonL; |
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bool buttonR; |
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bool buttonStart; |
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bool DPadUp; |
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bool DPadDown; |
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bool DPadLeft; |
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bool DPadRight; |
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bool CUp; |
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bool CDown; |
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bool CLeft; |
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bool CRight; |
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short xAxis; |
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short yAxis; |
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bool xAxisRaw[8]; |
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bool yAxisRaw[8]; |
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}; |
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ControllerData controller; |
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void updateOffsetsAndResolution() { |
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// the current bit counter |
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int bitCounter = 0; |
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// to hold the number of 1's in this bit |
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int thisResolution = 0; |
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// current index |
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int i = 0; |
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// we might be further refining a previous calibration, if non-zero, remove existing bitResolution |
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for (int i = 0; i < NUM_BITS; i++) { |
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bitOffsets[i] += bitResolution; |
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} |
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bitResolution /= 2; |
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for (; i < DATA_SIZE; i++) { |
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if (buffer[i] == false) { |
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// we skip all leading 1's |
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break; |
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} |
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} |
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// iterate over buffer |
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for (; i < DATA_SIZE - 1 && bitCounter < NUM_BITS; i++) { |
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if (buffer[i] == true) { |
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++thisResolution; |
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// if a falling edge is detected |
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if (buffer[1 + i] == false) { |
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// store bit's earliest possible beginning offsets |
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int thisOffset = i - thisResolution + 1; |
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if (bitOffsets[bitCounter] == 0 || bitOffsets[bitCounter] > thisOffset) { |
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bitOffsets[bitCounter] = thisOffset; |
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} |
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// store max resolution in bitResolution |
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if (thisResolution > bitResolution) { |
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bitResolution = thisResolution; |
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} |
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// reset thisResolution |
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thisResolution = 0; |
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// increment bitCounter |
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++bitCounter; |
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} |
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} |
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} |
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// calculate bit's beginning offsets by subtracting resolution |
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// if this index is 0, button is not pressed, if 1, button is pressed |
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for (int i = 0; i < NUM_BITS; i++) { |
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bitOffsets[i] -= bitResolution; |
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} |
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bitResolution *= 2; |
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} |
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void calcBitsToRead() { |
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bitsToRead = bitOffsets[NUM_BITS - 1] + 1; |
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if (bitsToRead < NUM_BITS * 2) { |
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// todo: not enough, error out... |
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} |
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} |
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void calcReturnedBits() { |
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// the current bit counter |
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int bitCounter = 0; |
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// to hold the number of 1's in this bit |
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int thisResolution = 0; |
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// current index |
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int i = 0; |
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for (; i < DATA_SIZE; i++) { |
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if (buffer[i] == false) { |
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// we skip all leading 1's |
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break; |
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} |
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} |
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// iterate over buffer |
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for (; i < DATA_SIZE - 1 && bitCounter < NUM_BITS; i++) { |
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if (buffer[i] == true) { |
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++thisResolution; |
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// if a falling edge is detected |
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if (buffer[1 + i] == false) { |
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returnedBits[bitCounter] = thisResolution >= bitResolution; |
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// reset thisResolution |
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thisResolution = 0; |
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// increment bitCounter |
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++bitCounter; |
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} |
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} |
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} |
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} |
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/* Function to extract a controller bit from the buffer of returned data */ |
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void getBit(bool *bit, int offset, bool *data) { |
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*bit = data[offset]; |
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} |
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/** Function to populate the controller struct if command 0x01 was sent. |
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* Buttons are set according to data in buffer, raw axis data is written, |
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* Axis Data is correctly decoded from raw axis data by taking two's complement |
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* and checking if value if below 'MAX_INCLINE_AXIS_X' or 'MAX_INCLINE_AXIS_Y'. |
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* If values surpass the maximum incline they are set to match those values. |
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*/ |
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void populateControllerStructOLD(ControllerData *data) { |
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// first byte |
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getBit(&(data->buttonA), bitOffsets[0], &buffer[0]); |
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getBit(&(data->buttonB), bitOffsets[1], &buffer[0]); |
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getBit(&(data->buttonZ), bitOffsets[2], &buffer[0]); |
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getBit(&(data->buttonStart), bitOffsets[3], &buffer[0]); |
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getBit(&(data->DPadUp), bitOffsets[4], &buffer[0]); |
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getBit(&(data->DPadDown), bitOffsets[5], &buffer[0]); |
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getBit(&(data->DPadLeft), bitOffsets[6], &buffer[0]); |
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getBit(&(data->DPadRight), bitOffsets[7], &buffer[0]); |
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// second byte, first two bits are unused |
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getBit(&(data->buttonL), bitOffsets[10], &buffer[0]); |
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getBit(&(data->buttonR), bitOffsets[11], &buffer[0]); |
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getBit(&(data->CUp), bitOffsets[12], &buffer[0]); |
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getBit(&(data->CDown), bitOffsets[13], &buffer[0]); |
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getBit(&(data->CLeft), bitOffsets[14], &buffer[0]); |
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getBit(&(data->CRight), bitOffsets[15], &buffer[0]); |
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// third byte |
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getBit(&(data->xAxisRaw[0]), bitOffsets[16], &buffer[0]); |
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getBit(&(data->xAxisRaw[1]), bitOffsets[17], &buffer[0]); |
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getBit(&(data->xAxisRaw[2]), bitOffsets[18], &buffer[0]); |
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getBit(&(data->xAxisRaw[3]), bitOffsets[19], &buffer[0]); |
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getBit(&(data->xAxisRaw[4]), bitOffsets[20], &buffer[0]); |
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getBit(&(data->xAxisRaw[5]), bitOffsets[21], &buffer[0]); |
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getBit(&(data->xAxisRaw[6]), bitOffsets[22], &buffer[0]); |
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getBit(&(data->xAxisRaw[7]), bitOffsets[23], &buffer[0]); |
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// fourth byte |
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getBit(&(data->yAxisRaw[0]), bitOffsets[24], &buffer[0]); |
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getBit(&(data->yAxisRaw[1]), bitOffsets[25], &buffer[0]); |
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getBit(&(data->yAxisRaw[2]), bitOffsets[26], &buffer[0]); |
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getBit(&(data->yAxisRaw[3]), bitOffsets[27], &buffer[0]); |
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getBit(&(data->yAxisRaw[4]), bitOffsets[28], &buffer[0]); |
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getBit(&(data->yAxisRaw[5]), bitOffsets[29], &buffer[0]); |
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getBit(&(data->yAxisRaw[6]), bitOffsets[30], &buffer[0]); |
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getBit(&(data->yAxisRaw[7]), bitOffsets[31], &buffer[0]); |
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// sum up bits to get axis bytes |
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data->xAxis = 0; |
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data->yAxis = 0; |
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for (int i = 0; i < 8; i++) { |
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data->xAxis += (data->xAxisRaw[i] * (0x80 >> (i))); |
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data->yAxis += (data->yAxisRaw[i] * (0x80 >> (i))); |
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} |
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// print axis values |
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#ifdef DEBUG |
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printf("yRaw: %i %i %i %i %i %i %i %i xRaw: %i %i %i %i %i %i %i %i yAxis: %03i xAxis: %03i", |
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data->yAxisRaw[0], |
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data->yAxisRaw[1], |
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data->yAxisRaw[2], |
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data->yAxisRaw[3], |
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data->yAxisRaw[4], |
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data->yAxisRaw[5], |
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data->yAxisRaw[6], |
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data->yAxisRaw[7], |
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data->xAxisRaw[0], |
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data->xAxisRaw[1], |
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data->xAxisRaw[2], |
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data->xAxisRaw[3], |
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data->xAxisRaw[4], |
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data->xAxisRaw[5], |
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data->xAxisRaw[6], |
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data->xAxisRaw[7], |
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data->yAxis, |
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data->xAxis); |
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#endif |
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// decode xAxis two's complement |
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if (data->xAxis & 0x80) { |
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data->xAxis = -1 * (0xff - data->xAxis); |
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} |
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// decode yAxis two's complement |
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if (data->yAxis & 0x80) { |
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data->yAxis = -1 * (0xff - data->yAxis); |
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} |
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/* |
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// keep x axis below maxIncline |
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if (data->xAxis > MAX_INCLINE_AXIS_X) |
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data->xAxis = MAX_INCLINE_AXIS_X; |
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if (data->xAxis < -MAX_INCLINE_AXIS_X) |
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data->xAxis = -MAX_INCLINE_AXIS_X; |
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// keep y axis below maxIncline |
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if (data->yAxis > MAX_INCLINE_AXIS_Y) |
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data->yAxis = MAX_INCLINE_AXIS_Y; |
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if (data->yAxis < -MAX_INCLINE_AXIS_Y) |
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data->yAxis = -MAX_INCLINE_AXIS_Y; |
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*/ |
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//printf("xaxis: %-3i yaxis: %-3i \n",data->xAxis,data->yAxis); |
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} |
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void populateControllerStruct(ControllerData *data) { |
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calcReturnedBits(); |
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// first byte |
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data->buttonA = returnedBits[0]; |
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data->buttonB = returnedBits[1]; |
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data->buttonZ = returnedBits[2]; |
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data->buttonStart = returnedBits[3]; |
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data->DPadUp = returnedBits[4]; |
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data->DPadDown = returnedBits[5]; |
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data->DPadLeft = returnedBits[6]; |
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data->DPadRight = returnedBits[7]; |
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// |
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// second byte, first two bits are unused |
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data->buttonL = returnedBits[10]; |
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data->buttonR = returnedBits[11]; |
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data->CUp = returnedBits[12]; |
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data->CDown = returnedBits[13]; |
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data->CRight = returnedBits[14]; |
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/* |
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// third byte |
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getBit(&(data->xAxisRaw[0]), bitOffsets[16], &buffer[0]); |
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getBit(&(data->xAxisRaw[1]), bitOffsets[17], &buffer[0]); |
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getBit(&(data->xAxisRaw[2]), bitOffsets[18], &buffer[0]); |
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getBit(&(data->xAxisRaw[3]), bitOffsets[19], &buffer[0]); |
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getBit(&(data->xAxisRaw[4]), bitOffsets[20], &buffer[0]); |
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getBit(&(data->xAxisRaw[5]), bitOffsets[21], &buffer[0]); |
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getBit(&(data->xAxisRaw[6]), bitOffsets[22], &buffer[0]); |
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getBit(&(data->xAxisRaw[7]), bitOffsets[23], &buffer[0]); |
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// fourth byte |
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getBit(&(data->yAxisRaw[0]), bitOffsets[24], &buffer[0]); |
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getBit(&(data->yAxisRaw[1]), bitOffsets[25], &buffer[0]); |
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getBit(&(data->yAxisRaw[2]), bitOffsets[26], &buffer[0]); |
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getBit(&(data->yAxisRaw[3]), bitOffsets[27], &buffer[0]); |
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getBit(&(data->yAxisRaw[4]), bitOffsets[28], &buffer[0]); |
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getBit(&(data->yAxisRaw[5]), bitOffsets[29], &buffer[0]); |
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getBit(&(data->yAxisRaw[6]), bitOffsets[30], &buffer[0]); |
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getBit(&(data->yAxisRaw[7]), bitOffsets[31], &buffer[0]); |
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// sum up bits to get axis bytes |
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data->xAxis = 0; |
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data->yAxis = 0; |
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for (int i = 0; i < 8; i++) { |
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data->xAxis += (data->xAxisRaw[i] * (0x80 >> (i))); |
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data->yAxis += (data->yAxisRaw[i] * (0x80 >> (i))); |
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} |
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// print axis values |
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#ifdef DEBUG |
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printf("yRaw: %i %i %i %i %i %i %i %i xRaw: %i %i %i %i %i %i %i %i yAxis: %03i xAxis: %03i", |
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data->yAxisRaw[0], |
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data->yAxisRaw[1], |
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data->yAxisRaw[2], |
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data->yAxisRaw[3], |
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data->yAxisRaw[4], |
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data->yAxisRaw[5], |
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data->yAxisRaw[6], |
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data->yAxisRaw[7], |
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data->xAxisRaw[0], |
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data->xAxisRaw[1], |
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data->xAxisRaw[2], |
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data->xAxisRaw[3], |
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data->xAxisRaw[4], |
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data->xAxisRaw[5], |
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data->xAxisRaw[6], |
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data->xAxisRaw[7], |
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data->yAxis, |
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data->xAxis); |
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#endif |
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// decode xAxis two's complement |
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if (data->xAxis & 0x80) { |
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data->xAxis = -1 * (0xff - data->xAxis); |
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} |
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// decode yAxis two's complement |
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if (data->yAxis & 0x80) { |
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data->yAxis = -1 * (0xff - data->yAxis); |
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} |
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//printf("xaxis: %-3i yaxis: %-3i \n",data->xAxis,data->yAxis); |
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*/ |
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} |
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void load(const char *s) { |
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const char *t; |
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int i = 0; |
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// convert test string to buffer |
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for (t = s; *t != '\0'; t++) { |
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buffer[i++] = *t == '1'; |
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} |
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} |
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void loadUpdate(const char *s) { |
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load(s); |
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updateOffsetsAndResolution(); |
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/* |
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for (int i = 0; i < DATA_SIZE; i++) { |
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printf(buffer[i] ? "1" : "0"); |
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} |
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printf("\n----------------\n"); |
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*/ |
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printf("bitOffsets: "); |
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for (int i = 0; i < NUM_BITS; i++) { |
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//printf("%i ", bitOffsets[i]); |
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printf("%i:%i ", i, bitOffsets[i]); |
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} |
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printf("\n"); |
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printf("bitResolution: %i\n", bitResolution); |
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//printf("bit 0: %i\n", buffer[0]]); |
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printf("bit buffer[14]: %i\n", buffer[14]); |
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printf("bit buffer[15]: %i\n", buffer[15]); |
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printf("bit buffer[16]: %i\n", buffer[16]); |
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} |
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void reset() { |
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// reset all bitOffsets to 0 which is invalid |
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for (int i = 0; i < NUM_BITS; i++) { |
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bitOffsets[i] = 0; |
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} |
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bitResolution = 0; |
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bitsToRead = DATA_SIZE; |
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} |
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void print(const char *s) { |
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printf(s); |
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} |
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// void setUp(void) { |
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// // set stuff up here |
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// } |
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// void tearDown(void) { |
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// // clean stuff up here |
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// } |
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/* |
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*/ |
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void test_function_updateOffsetsAndResolution(void) { |
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reset(); |
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loadUpdate( |
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"0000000000000000111110000000000000000011110000000000000000011111000000000000000011111000000000000000011111000000000000000001111000000000000000001111100000000000000001111100000000000000001111" |
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"1000000000000000001111000000000000000001111100000000000000001111100000000000000000111100000000000000000111100000000000000000111110000000000000000111110000000000000000011110000000000000000011" |
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"1100000000000000000111110000000000000000111110000000000000000011110000000000000000011110000000000000000011111000000000000000011111000000000000000001111000000000000000001111000000000000000001" |
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"1111000000000000000011111000000000000000001111000000000000000001111100000000000000001111100000000000000001111100000000000111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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TEST_ASSERT_EQUAL(5, bitResolution); |
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loadUpdate( |
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"1000000000000001111110000000000000000011110000000000000000011111000000000000000011111000000000000000011111000000000000000001111000000000000000001111100000000000000001111100000000000000001111" |
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"1000000000000000001111000000000000000001111100000000000000001111100000000000000000111100000000000000000111100000000000000000111110000000000000000111110000000000000000011110000000000000000011" |
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"1100000000000000000111110000000000000000111110000000000000000011110000000000000000011110000000000000000011111000000000000000011111000000000000000001111000000000000000001111000000000000000001" |
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"1111000000000000000011111000000000000000001111000000000000000001111100000000000000001111100000000000000001111100000000000111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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TEST_ASSERT_EQUAL(6, bitResolution); |
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loadUpdate( |
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"1000000000000000001111000000000000000011110000000000000000011111000000000000000011111000000000000000011111000000000000000001111000000000000000001111100000000000000001111100000000000000001111" |
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"1000000000000000001111000000000000000001111100000000000000001111100000000000000000111100000000000000000111100000000000000000111110000000000000000111110000000000000000011110000000000000000011" |
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"1100000000000000000111110000000000000000111110000000000000000011110000000000000000011110000000000000000011111000000000000000011111000000000000000001111000000000000000001111000000000000000001" |
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"1111000000000000000011111000000000000000001111000000000000000001111100000000000000001111100000000000000001111100000000000111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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TEST_ASSERT_EQUAL(6, bitResolution); |
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calcBitsToRead(); |
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TEST_ASSERT_EQUAL(670, bitsToRead); |
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bool buttonA = false; |
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getBit(&buttonA, bitOffsets[0], &buffer[0]); |
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TEST_ASSERT_EQUAL(false, buttonA); |
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load( |
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"0000001111111111111110000000000000000011110000000000000000011111000000000000000011111000000000000000011111000000000000000001111000000000000000001111100000000000000001111100000000000000001111" |
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"1000000000000000001111000000000000000001111100000000000000001111100000000000000000111100000000000000000111100000000000000000111110000000000000000111110000000000000000011110000000000000000011" |
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"1100000000000000000111110000000000000000111110000000000000000011110000000000000000011110000000000000000011111000000000000000011111000000000000000001111000000000000000001111000000000000000001" |
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"1111000000000000000011111000000000000000001111000000000000000001111100000000000000001111100000000000000001111100000000000111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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getBit(&buttonA, bitOffsets[0], &buffer[0]); |
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TEST_ASSERT_EQUAL(true, buttonA); |
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} |
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void test_function_realControllerRead(void) { |
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reset(); |
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loadUpdate( |
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"0000000000000011111000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000111110000000000000001111100000000000000011111000000000000" |
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"0001111100000000000000011111000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000011100000" |
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"0000000000111100000000000000011110000000000000000111100000000000000001111000000000000000111110000000000000001111100000000000000011111000000000000000111110000000000000001111100000000000000011" |
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"1100000000000000001111000000000000000011110000000000000000111100000000000111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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loadUpdate( |
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"0000000000000011111000000000000000111110000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000" |
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"0000111100000000000000001111000000000000000111110000000000000001111100000000000000011111000000000000000111110000000000000001111100000000000000011110000000000000000111100000000000000001111000" |
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"0000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000011111000000000000000111110000000000000" |
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"0011111000000000000000111110000000000000001111000000000000000011110000000000011111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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loadUpdate( |
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"0000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110000000000" |
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"0000011111000000000000000111110000000000000001111100000000000000011111000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110" |
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"0000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000111110000000000000001111100000000000000011111000000000000000111110000000000000001111100000000000" |
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"0000111100000000000000001111000000000000000011110000000000000000111100000000000111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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loadUpdate( |
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"0000000000000001111100000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000" |
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"0000011110000000000000000111100000000000000011111000000000000000111110000000000000001111100000000000000011111000000000000000111100000000000000001111000000000000000011110000000000000000111100" |
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"0000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000111110000000000000001111100000000000000011111000000000000" |
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"0001111100000000000000011110000000000000000111100000000000000001111000000000001111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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loadUpdate( |
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"0000000000000011111000000000000000111110000000000000001111100000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000" |
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"0000111100000000000000001111000000000000000011110000000000000001111100000000000000011111000000000000000111110000000000000001111100000000000000011111000000000000000111100000000000000001111000" |
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"0000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000111110000000000000" |
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"0011111000000000000000111110000000000000001111100000000000000011110000000000011111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111" |
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"1111111111111111111111111111111111111111"); |
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//TEST_ASSERT_EQUAL(5, bitResolution); |
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calcBitsToRead(); |
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//TEST_ASSERT_EQUAL(624, bitsToRead); |
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load( |
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"0000000000000000000000000000011111111111111011110000000000000000111100000000000000001111000000000000000011110000000000000000111100000000000000001111000000000000000011110000000000000001111100" |
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"0000000000" |
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"0001111100000000000000011111000000000000000111110000000000000001111100000000000000011110000000000000000111100000000000000001111000000111111111111110000001111111111111100000011111111111111000" |
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"0000000000000111100000000000000001111000000111111111111110000001111111111111100000000000000011111000000000000000111110000011111111111111100000000000000011111000000000000000111100000000000000" |
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"001111000000111111111111110000001111111111111100000011"); |
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bool buttonA = true; |
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getBit(&buttonA, bitOffsets[0], &buffer[0]); |
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TEST_ASSERT_EQUAL(false, buttonA); |
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populateControllerStruct(&controller); |
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print(" buttons: "); |
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/* |
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*/ |
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print(controller.buttonA ? "A" : "-"); |
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print(controller.buttonB ? "B" : "-"); |
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print(controller.buttonZ ? "Z" : "-"); |
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print(controller.buttonL ? "L" : "-"); |
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print(controller.buttonR ? "R" : "-"); |
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print(controller.buttonStart ? "S" : "-"); |
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print(" DPAD: "); |
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print(controller.DPadUp ? "U" : "-"); |
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print(controller.DPadDown ? "D" : "-"); |
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print(controller.DPadLeft ? "L" : "-"); |
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print(controller.DPadRight ? "R" : "-"); |
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print(" C: "); |
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print(controller.CUp ? "U" : "-"); |
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print(controller.CDown ? "D" : "-"); |
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print(controller.CLeft ? "L" : "-"); |
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print(controller.CRight ? "R" : "-"); |
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print(" Y: "); |
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//print(controller.yAxis); |
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//print(" YT: "); |
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//print(translateAxis(controller.yAxis)); |
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print(" X: "); |
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//print(controller.xAxis); |
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//print(" XT: "); |
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//print(translateAxis(controller.xAxis)); |
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printf("\n"); |
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} |
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|
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int main(int argc, char **argv) { |
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UNITY_BEGIN(); |
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//RUN_TEST(test_function_updateOffsetsAndResolution); |
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RUN_TEST(test_function_realControllerRead); |
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UNITY_END(); |
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|
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return 0; |
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}
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