execute fw/merge.py to merge STM32CubeIDE generated main.c with user code in main.cc into main.cc.
- IR Tx: PWM Output from TIM3_CH3, Output PB0, DMA1 Ch2
- Compare: 63/4 = 16
- Mode: Circular Normal Peripheral to Memory
| Peripheral | Memory | |
|---|---|---|
| Increment Address | X | V |
| Data Width | Half Word | Half Word |
- IR Rx: DMA Triggered through TIM2_CH3, Input PA0 read by DMA1 Ch1
- Compare: 105
- Mode: Circular Peripheral to Memory
| Peripheral | Memory | |
|---|---|---|
| Increment Address | X | V |
| Data Width | Half Word | Half Word |
- Led Rows/Cols: DMA Triggered through TIM1_UP, Output PB6-9(Rows), Output PB1-2/10-15(Cols), written by DMA1 Ch5
- Mode: Circular Memory to Peripheral
| Peripheral | Memory | |
|---|---|---|
| Increment Address | X | V |
| Data Width | Word | Word |
- Led Brightness control: PWM Output from TIM3_CH2
- Buttons: Reads Input PA4-10, PA15 through TIM4_CH2, DMA1 Ch4
- Compare: 5
- Mode: Circular Peripheral to Memory
| Peripheral | Memory | |
|---|---|---|
| Increment Address | X | V |
| Data Width | Half Word | Half Word |
-
Cross-board communication TX: USART2 TX, DMA1 Ch7
-
Cross-board communication RX: USART2 RX, DMA1 Ch6
-
TIM4: Operates at 100Hz for Button
- Prescaler: 12000-1
- Counter Period: 10-1
-
TIM3: Operates at 38kHz for PWM out.
- Prescaler: 5-1
- Counter Period: 63-1
- Master Mode Enable
-
TIM2:
- Prescaler: 0
- Counter Period: 4-1
- Slave Mode: External Clock
- Trigger Source: ITR2 (TIM3 Update Event)
- Operates at 1/4 speed of TIM3, synchronization needed for IR pulse alignment and brightness adjustment.
- Also operates at 1/4 bit time for capturing IR.
- TIM2 = 38/4 kHz = 9.5kHz.
- Bit time = 4/9.5kHz = 421us (each bit is 16 pulse).
-
TIM1:
- Prescaler: 5-1
- Counter Period: 1500-1
- LED refreshes at 3200/16 = 200Hz.
To check format, please install clang-format first.
# under hitcon-pcb-badge
./lint.sh # check format
./lint.sh -i # auto format