743b614875
* [components][clock_time] Refactor time subsystem around clock_time Introduce the clock_time core with clock source/event separation, high-resolution scheduling, and boot-time helpers, plus clock_timer adapters for timer peripherals. Remove legacy ktime/cputime/hwtimer implementations and migrate arch and BSP time paths to the new subsystem while keeping POSIX time integration functional. Update drivers, Kconfig/SConscript wiring, documentation, and tests; add clock_time overview docs and align naming to clock_boottime/clock_hrtimer/clock_timer. * [components][clock_time] Use BSP-provided clock timer frequency on riscv64 * [risc-v] Use runtime clock timer frequency for tick and delays * [bsp] Add clock timer frequency hooks for riscv64 boards * [bsp] Update Renesas RA driver doc clock_timer link * [bsp] Sync zynqmp-r5-axu4ev rtconfig after config refresh * [bsp][rk3500] Update rk3500 clock configuration * [bsp][hpmicro] Add rt_hw_us_delay hook and update board delays * [bsp][stm32l496-st-nucleo] enable clock_time for hwtimer sample in ci * [bsp][hpmicro] Fix rtconfig include scope for hpm6750evk Move rtconfig.h include outside the ENET_MULTIPLE_PORT guard for hpm6750evk and hpm6750evk2 so configuration macros are available regardless of ENET settings. * [bsp][raspi3] select clock time for systimer * [bsp][hpm5300evk] Trim trailing blank line * [bsp][hpm5301evklite] Trim trailing blank line * [bsp][hpm5e00evk] Trim trailing blank line * [bsp][hpm6200evk] Trim trailing blank line * [bsp][hpm6300evk] Trim trailing blank line * [bsp][hpm6750evk] Trim trailing blank line * [bsp][hpm6750evk2] Trim trailing blank line * [bsp][hpm6750evkmini] Trim trailing blank line * [bsp][hpm6800evk] Trim trailing blank line * [bsp][hpm6e00evk] Trim trailing blank line * [bsp][nxp] switch lpc178x to gcc and remove mcx timer source * [bsp][stm32] fix the CONFIG_RT_USING_CLOCK_TIME issue. * [docs][clock_time] add clock time documentation * [docs][clock_time] Update clock time subsystem documentation - Update device driver index to use correct page reference - Clarify upper layer responsibilities in architecture overview - Update README to describe POSIX/libc, Soft RTC, and device driver usage - Refine architecture diagram with improved layout and color scheme - Remove obsolete clock_timer.md file * [kernel][utest] Trim trailing space * [clock_time] Fix hrtimer wrap handling * [clock_time] fix the static rt_inline issue * [clock_time] fix the rt_clock_hrtimer_control result issue
Raspberry PICO
Introduction
Raspberry Pi Pico is a low-cost, high-performance microcontroller board with flexible digital interfaces.
Key features include:
-
RP2040 microcontroller chip designed by Raspberry Pi in the United Kingdom
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Dual-core Arm Cortex M0+ processor, flexible clock running up to 133 MHz
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264KB of SRAM, and 2MB of on-board Flash memory
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Castellated module allows soldering direct to carrier boards
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USB 1.1 with device and host support
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Low-power sleep and dormant modes
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Drag-and-drop programming using mass storage over USB
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26 × multi-function GPIO pins
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2 × SPI, 2 × I2C, 2 × UART, 3 × 12-bit ADC, 16 × controllable PWM channels
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Accurate clock and timer on-chip
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Temperature sensor
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Accelerated floating-point libraries on-chip
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8 × Programmable I/O (PIO) state machines for custom peripheral support
Supported compiler
Support GCC 6 and above compilers.
Program firmware
Step 1: download pico sdk
pkgs --update
Step 2: build
scons -c
scons
gcc version >= 6.x.x
Step 3: flash
scons generates a UF2 file:
- Copy the rtthread-pico.uf2 file to the "RPI-RP2" disk
- Then led blink.
Or you can use the picotool by:
picotool load rtthread-pico.uf2
picotool reboot
Running Result
The output information on serial port should be like this:
\ | /
- RT - Thread Operating System
/ | \ 4.0.3 build Jan 28 2021
2006 - 2021 Copyright by rt-thread team
Hello, RT-Thread!
msh >
Peripheral Condition
| Drive | Support | Remark |
|---|---|---|
| UART | Support | UART0/1 |
| GPIO | Support | 0-29 |
| I2C | Support | - |
| RTC | Support | - |
| SDIO | - | - |
| SPI | Support | - |
| TIMER | Support | - |
| WDT | Support | - |
| ADC | Support | - |
| FLASH | Support | - |
| PWM | Support | - |