Feather Charlie Wing

Adafruit 15x7 CharliePlex LED Matrix Display.

IS31FL3731 https://www.issi.com/WW/pdf/31FL3731.pdf

I2C Address 0x74

\ buffer for I2C
20 buffer: i2c-buf

\ set I2C address
$74 I2dev

\ select frame 1
$000000FD i2c-buf !
i2c-buf 2 I2Cput

\ switch on first 8 LEDs (first column?)
$0000FF00 i2c-buf !
i2c-buf 2 I2Cput

\ pwm first LED
$00007F24 i2c-buf !
i2c-buf 2 I2Cput

\ pwm second LED
$00007F25 i2c-buf !
i2c-buf 2 I2Cput