96 lines
2.8 KiB
Markdown
96 lines
2.8 KiB
Markdown
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# Board - ChebuzzF3
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The ChebuzzF3 is a daugter board which connects to the bottom of an STM32F3Discovery board and provides pin headers and ports for various FC connections.
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All connections were traced using a multimeter and then verified against the TauLabs source code using the revision linked.
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https://github.com/TauLabs/TauLabs/blob/816760dec2a20db7fb9ec1a505add240e696c31f/flight/targets/flyingf3/board-info/board_hw_defs.c
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## Connections
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Board orientation.
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These notes assume that when the board is placed with the header pins facing up, the bottom right of the board is next to the 8 sets of INPUT pin headers.
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Inner means between the two rows of header sockets, outer means between the left/right board edges and the header sockets.
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### SPI2 / External SPI
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sclk GPIOB 13
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miso GPIOB 14
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mosi GPIOB 15
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There are 4 pins, labelled CS1-4 next to a label that reads Ext SPI. The 3rd pin is connected to the flash chip on
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the bottom right inner of the board. The other pins on the flash chip are wired up to PB3/4/5
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### SPI3 / SPI
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sclk GPIOB 3
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miso GPIOB 4
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mosi GPIOB 5
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ssel 1 GPIOB 10 / Ext SPI CS1
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ssel 2 GPIOB 11 / Ext SPI CS2
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ssel 3 GPIOB 12 / Ext SPI CS3 - wired up to Slave Select of M25P16 15MBitFlash chip
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ssel 4 GPIOB 13 / Ext SPI CS4 - not usable since it is used for SPI2 sclk
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### RC Input
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INPUT
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PA8 / CH1 - TIM1_CH1
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PB8 / CH2 - TIM16_CH1
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PB9 / CH3 - TIM17_CH1
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PC6 / CH4 - TIM8_CH1
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PC7 / CH5 - TIM8_CH2
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PC8 / CH6 - TIM8_CH3
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PF9 / CH7 - TIM15_CH1
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PF10 / CH8 - TIM15_CH2
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### PWM Outputs
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OUTPUT
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PD12 / CH1 - TIM4_CH1
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PD13 / CH2 - TIM4_CH2
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PD14 / CH3 - TIM4_CH3
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PD15 / CH4 - TIM4_CH4
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PA1 / CH5 - TIM2_CH2
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PA2 / CH6 - TIM2_CH3
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PA3 / CH7 - TIM2_CH4
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PB0 / CH8 - TIM3_CH3
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PB1 / CH9 - TIM3_CH4
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PA4 / CH10 - TIM3_CH2
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### Other ports
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There is space for a MS5611 pressure sensor at the top left inner of the board.
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There is an I2C socket on the left outer of the board which connects to a PCA9306 I2C level shifter directly opposite (inner).
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The PCA9306 is not populated on some boards and thus the I2C socket is unusable.
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There is a CAN socket on the top right outer of the board which connects to a MAX3015 CAN Tranceiver.
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The MAX3015 is not populated on some boards and thus the CAN socket is unusable.
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There are some solder pads labelled Ext 1-4 at the top right inner of the board.
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GPIOE 6 / PE6 / Ext 1
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GPIOD 3 / PD3 / Ext 2
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GPIOD 4 / PD4 / Ext 3
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GPIOB 3 / PB3 / Ext 4
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There are some solder pads labelled ADC0-3 & Diff Press at the top left inner of the board
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They are connected to the ADC socket at the top left outer of the board
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PC3 / Diff Press - ADC12_IN9 (Differential Pressure)
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PC2 / ADC2 - ADC12_IN8
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PC1 / ADC1 - ADC12_IN7
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PC0 / ADC0 - ADC12_IN6
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There is space for a MPXV5004/MPVZ5004 differential pressure sensor, if populated it's analog pin connects to PC3.
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There are sockets for 5 UARTs labelled USART1-5.
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There is a socket labelled RX_IN.
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GPIOD 2 / PD2 / RX_IN
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