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Commit b4cfb41

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[bsp] Add LonganNano board support
- Get drivers from upstream - Fix no context switching after interrupt issue [libcpu] Get RISC-V support from upstream [drv] Add device IPC and common serial device driver from upstream
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‎README.md‎

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@@ -62,6 +62,7 @@ I hope this project will release the power of multitasking on Arduino platform.
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| --- | --- | --- |
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| SAM | ARM Cortex-M3 | Tested with Arduino Due |
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| SAMD | ARM Cortex-M0+ | Tested with Arduino MKRZero |
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| GD32V | Bumblebee (RV32IMAC) | Tested with Longan Nano |
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## License ##

‎library.properties‎

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name=RT-Thread
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version=0.7.8
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version=0.8.0
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author=onelife <onelife.real@gmail.com>, Bernard Xiong <bernard.xiong@gmail.com>
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maintainer=onelife <onelife.real@gmail.com>
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sentence=Real Time Operating System porting for Arduino SAM and SAMD boards
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paragraph=RT-Thread is an open source IoT operating system from China, which has strong scalability: from a tiny kernel running on a tiny core, for example ARM Cortex-M0, or Cortex-M3/4/7, to a rich feature system running on MIPS32, ARM Cortex-A8, ARM Cortex-A9 DualCore etc.
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category=Timing
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url=https://github.com/onelife/Arduino_RT-Thread_Library
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architectures=sam,samd
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architectures=sam,samd,gd32v
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licence=Apache License 2.0
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includes=rtt.h

‎src/bsp/LonganNano/drv_tick.c‎

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/***************************************************************************//**
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* @file drv_tick.cpp
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* @brief Arduino RT-Thread library RISC-V tick driver
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* @author onelife <onelife.real[at]gmail.com>
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******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "include/rtthread.h"
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#if defined(BOARD_SIPEED_LONGAN_NANO)
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#include "bsp/bsp.h"
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/***************************************************************************//**
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* @addtogroup LonganNano
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* @{
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******************************************************************************/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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static rt_uint64_t overflow = 0;
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/* Private functions ---------------------------------------------------------*/
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/* Public functions ----------------------------------------------------------*/
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rt_err_t bsp_hw_tick_init(void) {
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rt_uint64_t ticks;
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/* get counter value */
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ticks = *(rt_uint64_t *)(TIMER_CTRL_ADDR + TIMER_MTIME);
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/* set compare value */
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if ((ticks + (TIMER_FREQ / RT_TICK_PER_SECOND)) < ticks) {
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/* overflow */
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overflow = ticks + (TIMER_FREQ / RT_TICK_PER_SECOND);
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*(rt_uint64_t *)(TIMER_CTRL_ADDR + TIMER_MTIMECMP) = (rt_uint64_t)(-1);
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} else {
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overflow = 0;
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*(rt_uint64_t *)(TIMER_CTRL_ADDR + TIMER_MTIMECMP) = \
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ticks + (TIMER_FREQ / RT_TICK_PER_SECOND);
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}
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*(rt_uint32_t *)(TIMER_CTRL_ADDR + TIMER_MSIP) = 1;
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eclic_irq_enable(CLIC_INT_TMR, 0, 0);
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return RT_EOK;
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}
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/* system timer ISR */
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void eclic_mtip_handler(void) {
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rt_uint64_t ticks;
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/* update compare value */
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if (overflow > 0) {
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/* overflow 2nd half */
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*(rt_uint64_t *)(TIMER_CTRL_ADDR + TIMER_MTIME) = 0;
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*(rt_uint64_t *)(TIMER_CTRL_ADDR + TIMER_MTIMECMP) = overflow;
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overflow = 0;
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return;
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}
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ticks = *(rt_uint64_t *)(TIMER_CTRL_ADDR + TIMER_MTIME);
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if ((ticks + (TIMER_FREQ / RT_TICK_PER_SECOND)) < ticks) {
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/* overflow */
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overflow = ticks + (TIMER_FREQ / RT_TICK_PER_SECOND);
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*(rt_uint64_t *)(TIMER_CTRL_ADDR + TIMER_MTIMECMP) = \
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(rt_uint64_t)(-1);
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} else {
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overflow = 0;
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*(rt_uint64_t *)(TIMER_CTRL_ADDR + TIMER_MTIMECMP) = \
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ticks + (TIMER_FREQ / RT_TICK_PER_SECOND);
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}
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rt_interrupt_enter();
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rt_tick_increase();
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rt_interrupt_leave();
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}
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/***************************************************************************//**
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* @}
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******************************************************************************/
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#endif /* defined(BOARD_SIPEED_LONGAN_NANO) */

‎src/bsp/LonganNano/drv_tick.h‎

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/***************************************************************************//**
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* @file drv_tick.h
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* @brief Arduino RT-Thread library RISC-V tick driver header
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* @author onelife <onelife.real[at]gmail.com>
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******************************************************************************/
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#ifndef __LONGAN_NANO_DRV_TICK_H__
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#define __LONGAN_NANO_DRV_TICK_H__
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/* Includes ------------------------------------------------------------------*/
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/* Exported defines ----------------------------------------------------------*/
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/* Exported types ------------------------------------------------------------*/
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/* Exported constants --------------------------------------------------------*/
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/* Exported functions ------------------------------------------------------- */
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rt_err_t bsp_hw_tick_init(void);
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#endif /* __LONGAN_NANO_DRV_TICK_H__ */

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