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stm32: Improved CAN support for STM32 (#2976)

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Reworked the STM32F0 CAN bus implementation. It's more robust and higher performance.

Added support for function remapping to different pins.  API is emulating an STM32F0.

Improved and ported CAN bus to STM32F0, F1 and F4.

Signed-off-by: Pontus Borg <glpontus@gmail.com>
This commit is contained in:
bondus
2020-06-25 00:59:38 +02:00
committed by GitHub
parent 7cab732ae9
commit 7a8e9591e3
7 changed files with 493 additions and 279 deletions
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20
src/stm32/Kconfig
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@@ -159,18 +159,36 @@ config USBSERIAL
bool "Use USB for communication (instead of serial)"
depends on HAVE_STM32_USBFS || HAVE_STM32_USBOTG
default y
config CANSERIAL
bool "Use CAN for communication (instead of serial)"
depends on MACH_STM32F042 && !USBSERIAL
depends on !USBSERIAL
default n
config SERIAL_BAUD
int "CAN bus speed" if LOW_LEVEL_OPTIONS && CANSERIAL
default 500000 if CANSERIAL
choice
depends on CANSERIAL
prompt "CAN pins"
config CAN_PINS_PA11_PA12
bool "Pins PA11(rx) and PA12(tx)"
config CAN_PINS_PB8_PB9
bool "Pins PB8(rx) and PB9(tx)"
config CAN_PINS_PI8_PH13
bool "Pins PI8(rx) and PH13(tx)" if MACH_STM32F4
config CAN_PINS_PB5_PB6
bool "Pins PB5(rx) and PB6(tx)" if MACH_STM32F4
config CAN_PINS_PB12_PB13
bool "Pins PB12(rx) and PB13(tx)" if MACH_STM32F4
endchoice
config STM32F042_PIN_SWAP
bool "Use PA9/PA10 for USB or CAN" if MACH_STM32F042
depends on (USBSERIAL || CANSERIAL) && MACH_STM32F042
default y if (USBSERIAL || CANSERIAL)
default n
help
Remaps logical pins PA11/PA12 to physical PA9/PA10 on low pincount F042 devices.
config SERIAL
depends on !USBSERIAL && !CANSERIAL
bool