`#define MATRIX_TYPE RGB_MATRIX_PWM //RGB_MATRIX_BIN or RGB_MATRIX_PWM #if MATRIX_TYPE==RGB_MATRIX_PWM uint8_t buf[RGB_MATRIX_PWM_BUF]; #else uint8_t buf[RGB_MATRIX_BIN_BUF]; #endif RGB_Matrix matrix[MATRIX_ROWS][MATRIX_COLS] = { RGB_Matrix((uint8_t)0x50, buf, MATRIX_TYPE), RGB_Matrix((uint8_t)0x51, buf, MATRIX_TYPE), RGB_Matrix((uint8_t)0x52, buf, MATRIX_TYPE), RGB_Matrix((uint8_t)0x53, buf, MATRIX_TYPE) };`

But I got very chaotic results. On further testing, I found the columns were simply in reverse order for the green component. I worked around the problem by modifying one line of the library RGB_Matrix_Arduino.cpp:

` } else { //Serial.println("Setting BIN pixel"); (red) ? _buf[row] |= _BV(col) : _buf[row] &= ~_BV(col); // (grn) ? _buf[row + 8] |= _BV(col) : _buf[row + 8] &= ~_BV(col); (grn) ? _buf[row + 8] |= _BV(7-col) : _buf[row + 8] &= ~_BV(7-col); // srs 2015-02-14; green was going backwards (blu) ? _buf[row + 16] |= _BV(col) : _buf[row + 16] &= ~_BV(col); }`

I don't know if that was the best place to make the change, but it seems to have worked. I would be interested to know if anyone else has seen the same thing.

]]>Any help is greatly appreciated.

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