The serial device needs to be enabled before setting the DLAB bit.
This prevented UART3 from working.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The stm32 specs indicate that the SPE bit must be cleared before
changing the CPHA or CPOL bits.
Reported by @cbc02009 and @bigtreetech.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
It's possible for the SCLK pin to still be updating even after the
last byte of data has been read from the receive pin. (In particular
in spi mode 0 and 1.) Exiting early from spi_transfer() in this case
could result in the CS pin being raised before the final updates to
SCLK pin.
Add an additional wait at the end of spi_transfer() to avoid this
issue.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The rp2040 can be flashed without sudo when using udev rules to give the
user permission, but in a standard configuration sudo is required.
Here we make it possible for flash_usb to use sudo for the rp2040
target, and make it the default when using `make flash` for the rp2040.
As for other targets, one can set `NOSUDO=1` to not call through sudo.
Signed-off-by: Lasse Dalegaard <dalegaard@gmail.com>
This implements I2C for the rp2040 target. All output groupings of both
I2C blocks are available for use.
Signed-off-by: Lasse Dalegaard <dalegaard@gmail.com>
This adds `make flash` support for the rp2040 target. Flashing is
performed using a custom `rp2040_flash` tool that uses the PICOBOOT
protocol. Root is not required.
The user specifies the serial device of the rp2040 they wish to flash as
the device. This device is reset into bootsel mode and `rp2040_flash`
is invoked on the original USB device path.
If the device is already in bootloader mode, the user can specify
'first' as `FLASH_DEVICE` which will simply invoke `rp2040_flash` with
no bus/address options.
Signed-off-by: Lasse Dalegaard <dalegaard@gmail.com>
Unify the handling of the enable_pclock() and is_enabled_pclock() code
across all stm32 chips. All chips will now perform a peripheral reset
on enable_pclock() (this is a change for stm32f0 and stm32h7). The
enable_pclock() code will now also disable irqs during the enable.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Avoid read-modify-write operations where possible. The register
values are in a known state so prefer absolute writes.
Improve handling of race conditions with hardware updates.
Remove the adc reference from "struct gpio_adc" as it is a constant.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Use a fixed layout for the USB transfer memory and remove the ep_mem
struct definition.
This is in preparation for stm32g0 support.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The gpio_peripheral() code is the same in stm32f0.c, stm32f4.c, and
stm32h7.c. Move that function to a new gpioperiph.c file to avoid
code duplication.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Don't go above 400Mhz as otherwise it causes 32bit rollover issues.
(Parts of the code expect a rollover will not occur faster than 10
seconds.)
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Multiplying the desired bitrate by 4 results in half the
desired period and thus twice the desired bitrate.
Signed-off-by: Alex Maclean <monkeh@monkeh.net>
This clock is only needed for low-power operation mode,
and wasn't correctly configured anyway (should be 48MHz).
Signed-off-by: Alex Maclean <monkeh@monkeh.net>
Commit 9ecddd1b fixed a serious error (introduced in 7d95a004). Force
a protocol version change so users are aware of the need to update the
mcu code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Commit 7d95a004 introduced a defect - if the cached timer pointed to
by last_insert did not reschedule itself then the cache would not be
in a valid state and other active timers may not get properly
rescheduled.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add an optimized step function for drivers that support stepping on
both rising and falling edges of the step pin. Enable this
optimization on 32bit ARM micro-controllers. Automatically detect
this capability in the host code and enable on TMC drivers running in
SPI/UART mode.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Remove the STEP_DELAY Kconfig option and replace it with a per-stepper
step_pulse_duration printer.cfg config option.
The AVR code will continue to have optimized code to step and "unstep"
in the same function (which is automatically activated when the step
delay is 40 ticks or less). This change removes the Kconfig option
for single function step/unstep on 32bit processors.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Kevin O'Connor