27 AUG 2025

Since last update:

• Added 2 test points: PITCH_STEP, YAW_STEP
• Added comments about STEP pins in schematic
• Changed PITCH_END, LEFT_END, RIGHT_END, LASER, SPARE_IN0, SPARE_IN1, SPARE_OUT0, SPARE_OUT1 pins due to external interrupt needs
• Changed focus motor drive calculations due to Adafruit motors are 1/16 ratio
• Created UART transmit codes
• Tested PWM for PA8 (PITCH_STEP) and PB0 (YAW_STEP); calculated prescaler, period counter, and pulse values
• Calculated estimated max current draw of system
• Updated Bino Pi Reference Sheet, schematic

Future Plans:

Short Term:

• Get timing interrupt to work
• Create 6 sequences for focus motor stepping: 1-phase full step CW & CCW, 2-phase full step CW & CCW, half-step CW & CCW
• Test UART and transmit codes (TX from MCU to Analog Discovery 3 working; need to test RX on MCU)
• Test endstop interrupts
• Test laser output circuit using 2N3904; determine experimental current consumption

Long Term:

• Submit PCB for fabrication
• Adjust bottom assembly mounting for PCBA
• Verify operation of PCBA
• Conduct dual-camera operations with OpenCV in Python