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This is a minor release of the SDK with many bug fixes and documentation improvements, along with some new features.
Highlights are listed below, or you can see the full list of individual commits here, and the full list of resolved issues here.
The following board has been added and may be specified via PICO_BOARD:
adafruit_feather_rp2350datanoisetv_rp2350_dsphellbender_0001machdyne_werkzeugpico2_wpimoroni_pico_plus2_w_rp2350sparkfun_thingplus_rp2350The following board configurations have been modified:
pimoroni_plasma2350 - corrected flash size, renamed SPICE to SPCEpimoroni_tiny2350 - corrected flash sizehardware_xxx_set_clkdiv_int_frac(uint16_t div_int, uint8_t div_frac) have been modified to hardware_xx_set_clkdiv_int_frac8(uint32_t div_int, uint8_t div_frac). This has been done for consistency and to make the APIs more resistant to hardware changes. The old APIs are preserved for backwards compatibility.PICO_CLKDIV_ROUND_NEAREST) is to round to the nearest achievable value. This minor change in behavior was deemed better in general, which is why the default was changed. You may set PICO_CLKDIV_ROUND_NEAREST=0 to restore the previous beahvior by default (note that individual libraries have their own configuration values which can be used to change the behavior on a per-library basis).PICO_ADC_CLKDIV_ROUND_NEAREST for controlling rounding of floating-point clock dividersPICO_CLOCK_AJDUST_PERI_CLOCK_WITH_SYS_CLOCK to PICO_CLOCK_ADJUST_PERI_CLOCK_WITH_SYS_CLOCK. The former is still supported.vco_calc.py now outputs SYS_CLK_HZ in the CMake output, which is required for clock_get_hz(clk_sys) to return the correct valueclock_gpio_init_int_frac() to clock_gpio_init_int_frac8() to be clear that it takes an 8-bit fraction; the old name is still supported.clock_gpio_init_int_frac16() to specify the fraction with 16-bit precision (RP2350 has 16 bits of precision). This method can still be called on RP2040 in which case the low 8-bits are ignored.PICO_CLOCK_GPIO_CLKDIV_ROUND_NEAREST for controlling rounding of floating-point clock dividersdma_channel_cleanup() to disable the channel with the new DMA IRQs added in RP2350flash_range_eraae(), flash_range_program() and flash_do_cmd() from trashing the user's CS1 QMI configuration on RP2350flash_safe_execute on FreeRTOS SMPi2c_write_burst_blocking and i2c_read_burst_blocking to send/receive multiple bytes without intervening stops.i2c_read_blockinginterp_add_accumulater() to interp_add_accumulator(). The old incorrect spelling is still supported.pio_sm_set_pins64(), pio_sm_set_pins_with_mask64() and pio_sm_set_pindirs_with_mask64() to allow setting of >32 pins.sm_config_set_in_pin_count()sm_config_set_clkdiv_int_frac() to sm_config_set_clkdiv_int_frac8() to be clear that it takes an 8-bit fraction; the old name is still supported. Note that "int" part in the new method is 32-bit not 16-bit for consistency with other clkdiv methods.pio_calculate_clkdiv_from_float() to pio_calculate_clkdiv8_from_float() to be clear that it produces an 8-bit fraction; the old name is still supported. Note that "int" part in the new method is 32-bit not 16-bit for consistency with other clkdiv methods.PICO_PIO_CLKDIV_ROUND_NEAREST for controlling rounding of floating-point clock dividerspwm_config_set_clkdiv_int_frac() to pwm_config_set_clkdiv_int_frac4() to be clear that it takes an 4-bit fraction; the old name is still supported. Note that "int" part in the new method is 32-bit not 8-bit for consistency with other clkdiv methods.PICO_PWM_CLKDIV_ROUND_NEAREST for controlling rounding of floating-point clock dividershardware_alarm_get_irq_num() method added in SDK2.0.0. The variant that takes (and uses) a timer instance is called timer_hardware_alarm_get_irq_num().Added aon_timer_start_calendar(), aon_timer_set_time_calendar(), aon_timer_get_time_calendar() and aon_timer_enable_alarm_calendar() methods. These are equivalent to the non-_calendar() variants except they deal in calendar (date/) time, rather than time intervals.
These new variants are preferred on RP2040 since otherwise a date/time conversion must be performed which pulls in a lot of C library code. For the same reason, the pre-existing variants are preferred on RP2350. This discrepancy results from the different hardware used for the AON timer on RP2040 and RP2350.
execute_sync() on FreeRTOSbi_Xpins_with_names() macros now work correctly when pin numbers are not in orderrom_reset_usb_boot_extra() which supports an "activity" GPIO pin > 32 and GPIO pin inversion (active low).flash_safe_execute(). This affects rom_flash_op() and rom_explicit_buy()`__HeapLimit is now correctly set by the default linker scripts again-Wl,--print-memory-usage showing 100% RAM usedpicolibc integrationcye43_driver to revision cf924bbcyw43_set_pio_clkdiv_int_frac() to cyw43_set_pio_clkdiv_int_frac8() to be clear that it takes an 8-bit fraction; the old name is still supported. Note that "int" part in the new method is 32-bit not 16-bit for consistency with other clkdiv methodsCYW43_PIO_CLOCK_DIV_FRAC8 to CYW43_PIO_CLOCK_DIV_FRAC. The old name is still supportedPICO_BTSTACK_CYW43_MAX_HCI_PROCESS_LOOP_COUNT configuration option, which can be used to prevent starvation in high frequency Bluetooth scenarios.calloc() and realloc() with picolibcpico_default_asm_volatile_goto()boot_stage2 binary info (missing in SDK 2.0.0)stdio_flush() when used with stdio_uart_init_full()stdio_set_chars_available_callback()PICO_STDIO_USB_RESET_BOOTSEL_FIXED_ACTIVITY_LED_ACTIVE_LOW setting for RP2350best_effort_wfe_or_timeout() on RP2350datetime_to_tm() and tm_to_datetime() for converting C library date/times to/from RP2040 RTC date/timespico_localtime_r() and pico_mktime() for use by pico_util time conversion code. These methods cass the equivalent C library function, but are defined weakly so the user can provide their ownSplit out the headers defining the bootrom interface - that might be used outside the SDK - from pico_bootrom which is focused on calling the bootrom from the SDK, and has non-trivial dependencies.
Provides XIP cache maintenance APIs:
mov rx_fifo, ... and mov ..., rx_fifo instructions.hex file output (lost in 2.0.0)PICO_FLASH_SIZE_BYTES and PICO_CYW43_SUPPORTED if specified in CMake, correctly affect the compiled code.PANIC and AUTO_INIT_MUTEX options to pico_minimize_runtime()boot_stage2 build reproducible (same binary if no source changes)Thanks to the following for their contributions:
anhnhancao, Andrew Featherstone, Andrew Burge, Andrew Scheller, Armando Montanez, Caleb Jamison, Chris Boross, Dave Roth, David Goffredo, Dhiru Kholia, Dranoel, Dryw Wade, Earle F. Philhower, Giampiero Baggiani, Graham Sanderson, Gregory Neverov, Hugh Nixon, iCMDdev, inc, Ikko Eltociear Ashimine, Jack Wilsdon, jaguilar, Koji KITAYAMA, Liam Fraser, Luke Wren, Machdyne UG, Matt Bennett, Mete Balcı, newbrain, Nhan Cao, Nikhil Dabas, Peter Harper, Petr Hosek, Philip Howard, Scott Shawcroft, seesturm, Stanislav Rubint, Stefan Kerkmann, Sylwester, Taylor Cramer, theshteves, Thomas Watson, Tobias Simetsreiter, William Vinnicombe, yh-sb