57 lines
1.2 KiB
Markdown
57 lines
1.2 KiB
Markdown
# General Design Notes #
|
|
|
|
## STM32 ##
|
|
|
|
Vss is ground.
|
|
|
|
### Bypass ###
|
|
|
|
VDD Needs:
|
|
- 2x 100nF
|
|
- 1x 4.7 uF
|
|
|
|
VDDA Needs:
|
|
- 1x 10nF
|
|
- 1x 1uF
|
|
|
|
### Pin Stuff ###
|
|
|
|
External interrupts can be assigned to any GPIO pin.
|
|
|
|
SWDIO is PA13
|
|
SWCLK is PA14
|
|
|
|
Internal clock so OSC_IN and OSC_OUT pins can be NC.
|
|
|
|
NRST is active low reset.
|
|
|
|
### UART Flash Uploading ###
|
|
|
|
If BOOT0 is pulled up I think it boots a bootloader that can reprogram flash through USART. Test this out on my dev board.
|
|
|
|
Not going to test this, no real sense in doing this when I have an ST-LINK/V2 anyways.
|
|
Pull low to make it use user flash.
|
|
|
|
## 74HC595 ##
|
|
|
|
RCLK latches data from the shift register to the output register.
|
|
SRCLK clocks in data from SER (and shifts all data around)
|
|
SRCLR clears the shift register
|
|
OE is output enable.
|
|
|
|
QH' is an output pin, it clocks out the value in QH.
|
|
|
|
## I2C ##
|
|
|
|
STM32F030 I2C Pins:
|
|
- PA9: I2C1_SCL
|
|
- PA10: I2C1_SDA
|
|
|
|
How do I determine the I2C address?
|
|
- I can hardcode it (annoying to change, have to have seperate binaries)
|
|
- I can listen on I2C...
|
|
|
|
I know what to do. Have a default address to listen to, but you can change it over I2C. It stores this address in EEPROM so it persists across reflashes.
|
|
|
|
Easy-peasy.
|