目录
在ART-Pi H750上移植TouchGFX（一）——使用STM32CUBMX生成TouchGFX工程
在ART-Pi H750上移植TouchGFX（二）——制作MDK的外部QSPI-FLASH烧录算法
在ART-Pi H750上移植TouchGFX（三）——移植TouchGFX到RT-Thread系统
在ART-Pi H750上移植TouchGFX（四）——使用RT-Thread Studio移植TouchGFX
在ART-Pi H750上移植TouchGFX（五）——制作ST-LINK的外部QSPI-FLASH烧录算法
实验平台：
硬件： RT-Thread官方ART-PI H750开发版，正点原子4.3寸RGBLCD屏（800*480）
软件： 最新版本的STM32CubeH7固件库，TouchGFXDesigner v4.14和 STM32CubeMX V6.0.1，开发环境MDK v5.29
代码下载：
待公布
联系作者：
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初识RT-Thread
RT-Thread 是一个集实时操作系统（RTOS）内核、中间件组件和开发者社区于一体的技术平台，由熊谱翔先生带领并集合开源社区力量开发而成，RT-Thread 也是一个组件完整丰富、高度可伸缩、简易开发、超低功耗、高安全性的物联网操作系统。RT-Thread 具备一个 IoT OS 平台所需的所有关键组件，例如GUI、网络协议栈、安全传输、低功耗组件等等。经过11年的累积发展，RT-Thread 已经拥有一个国内最大的嵌入式开源社区，同时被广泛应用于能源、车载、医疗、消费电子等多个行业，累积装机量超过 6亿 台，成为国人自主开发、国内最成熟稳定和装机量最大的开源 RTOS。
自2006年发布源码并开源，RT-Thread坚持“开源、开放”的理念，贴近开发者满足市场需求，坚持做小而美的物联网操作系统，当前已可完美覆盖面向嵌入式及IoT不同应用场景：
- 小资源场景的MCU用于简单控制使用RT-Thread Nano版本（2006年发布，针对Cortex-M、RISC-V等）；
- 中等规模的IoT节点使用RT-Thread IoT OS版本（2017年发布，针对Cortex-M、龙芯、RISC-V等）；
- 功能丰富的智能设备使用RT-Thread Smart微内核版本（2020年发布，针对带MMU的处理器如Cortex-A、龙芯、RISC-V等）。
如何获取RT-Thread源代码
github地址：https://github.com/RT-Thread/rt-thread
gitee地址：https://gitee.com/rtthread/rt-thread
如何学习RT-Thread
- RT-Thread系统官方学习文档，https://www.rt-thread.org/document/site/
- 了解RT-Thread系统的内核，下载安装Env工具和RT-Thread Studio开发工具。
- 学习RT-Thread的设备驱动、组件和软件包的使用方法。
更换TouchGFX的操作系统
STM32CubeMX默认支持的操作系统为FreeRTOS，TouchGFX可以运行在带操作系统和不带操作系统的应用中，用户想要更换操作系统，只需要重新实现OSWrappers类，便可以切换不同的RTOS。
移植TouchGFX到RT-Thread
1.重新实现OSWrappers类：
/**
******************************************************************************
* File Name : OSWrappers.cpp
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2020 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under Ultimate Liberty license
* SLA0044, the "License"; You may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* www.st.com/SLA0044
*
******************************************************************************
*/
#include <touchgfx/hal/OSWrappers.hpp>
#include <stm32h7xx_hal.h>
#include <touchgfx/hal/GPIO.hpp>
#include <touchgfx/hal/HAL.hpp>
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include <rthw.h>
static rt_sem_t frame_buffer_sem;
static rt_mq_t vsync_q = 0;
using namespace touchgfx;
// Just a dummy value to insert in the VSYNC queue.
static uint8_t dummy = 0x5a;
/*
* Initialize frame buffer semaphore and queue/mutex for VSYNC signal.
*/
void OSWrappers::initialize()
{
frame_buffer_sem = rt_sem_create("gfx_sem", 1, RT_IPC_FLAG_PRIO);
// Create a queue of length 1
vsync_q = rt_mq_create("gfx_mq", 1, 1, RT_IPC_FLAG_PRIO);
}
/*
* Take the frame buffer semaphore. Blocks until semaphore is available.
*/
void OSWrappers::takeFrameBufferSemaphore()
{
rt_sem_take(frame_buffer_sem, RT_WAITING_FOREVER);
}
/*
* Release the frame buffer semaphore.
*/
void OSWrappers::giveFrameBufferSemaphore()
{
rt_sem_release(frame_buffer_sem);
}
/*
* Attempt to obtain the frame buffer semaphore. If semaphore is not available, do
* nothing.
*
* Note must return immediately! This function does not care who has the taken the semaphore,
* it only serves to make sure that the semaphore is taken by someone.
*/
void OSWrappers::tryTakeFrameBufferSemaphore()
{
rt_sem_trytake(frame_buffer_sem);
}
/*
* Release the frame buffer semaphore in a way that is safe in interrupt context. Called
* from ISR.
*
* Release the frame buffer semaphore in a way that is safe in interrupt context.
* Called from ISR.
*/
void OSWrappers::giveFrameBufferSemaphoreFromISR()
{
// Since this is called from an interrupt, FreeRTOS requires special handling to trigger a
// re-scheduling. May be applicable for other OSes as well.
rt_sem_release(frame_buffer_sem);
}
/*
* Signal that a VSYNC has occurred. Should make the vsync queue/mutex available.
*
* Note This function is called from an ISR, and should (depending on OS) trigger a
* scheduling.
*/
void OSWrappers::signalVSync()
{
if (vsync_q)
{
rt_mq_send(vsync_q, &dummy, 1);
}
}
/*
* This function blocks until a VSYNC occurs.
*
* Note This function must first clear the mutex/queue and then wait for the next one to
* occur.
*/
void OSWrappers::waitForVSync()
{
// First make sure the queue is empty, by trying to remove an element with 0 timeout.
rt_mq_recv(vsync_q, &dummy, 1, 0);
// Then, wait for next VSYNC to occur.
rt_mq_recv(vsync_q, &dummy, 1, RT_WAITING_FOREVER);
}
/*
* A function that causes executing task to sleep for a number of milliseconds.
*
* A function that causes executing task to sleep for a number of milliseconds.
* This function is OPTIONAL. It is only used by the TouchGFX in the case of
* a specific frame refresh strategy (REFRESH_STRATEGY_OPTIM_SINGLE_BUFFER_TFT_CTRL).
* Due to backwards compatibility, in order for this function to be useable by the HAL
* the function must be explicitly registered:
* hal.registerTaskDelayFunction(&OSWrappers::taskDelay)
*
* see HAL::setFrameRefreshStrategy(FrameRefreshStrategy s)
* see HAL::registerTaskDelayFunction(void (*delayF)(uint16_t))
*/
void OSWrappers::taskDelay(uint16_t ms)
{
rt_thread_mdelay(ms);
}
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
2. 在rtthread中添加touchgfx需要的外设
移植思路：回顾一下touchgfx需要的组件构成，只需要在rtthread中按需添加即可，详细步骤可以参考此教程：使用RTThread和TouchGFX实现DIY数字仪表（二）——把TouchGFX移植到RTThread系统
ART-PI实战演示
1.打开上一节的工程，导入一个游戏例程
由于此工程比较大，除了图片和字体，代码量已经超过了128k，所以不能像上一个工程那样直接下载代码了。这种情况，可以参考ST官方开发板的做法，把所有的代码都放到外部flash的空间，内部的128k空间，用来制作bootloader，bootloader上电后对qspi地址映射，然后跳转到qspi flash的地址运行程序。
2.制作bootloader
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include <drv_common.h>
#include "w25qxx.h"
#define DBG_TAG "main"
#define DBG_LVL DBG_LOG
#include <rtdbg.h>
/* defined the LED0 pin: PB1 */
#define LED0_PIN GET_PIN(I, 8)
#define VECT_TAB_OFFSET 0x00000000UL
#define APPLICATION_ADDRESS (uint32_t)0x90000000
typedef void (*pFunction)(void);
pFunction JumpToApplication;
int main(void)
{
/* set LED0 pin mode to output */
rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
W25QXX_Init();
W25Q_Memory_Mapped_Enable();//地址映射
SCB_DisableICache();
SCB_DisableDCache();
SysTick->CTRL = 0;
JumpToApplication = (pFunction)(*(__IO uint32_t *)(APPLICATION_ADDRESS + 4));
__set_MSP(*(__IO uint32_t *)APPLICATION_ADDRESS);
JumpToApplication();//跳转
return RT_EOK;
}
3.制作APP
修改分散加载文件，使代码全部放到外部flash
添加中断重映射
static int vtor_config(void)
{
/* Vector Table Relocation in Internal QSPI_FLASH */
SCB->VTOR = QSPI_BASE;
return 0;
}
INIT_BOARD_EXPORT(vtor_config);
4.添加触摸gt9147软件包
然后在STM32TouchController.cpp中给touchgfx赋值xy坐标
bool STM32TouchController::sampleTouch(int32_t& x, int32_t& y)
{
/**
* By default sampleTouch returns false,
* return true if a touch has been detected, otherwise false.
*
* Coordinates are passed to the caller by reference by x and y.
*
* This function is called by the TouchGFX framework.
* By default sampleTouch is called every tick, this can be adjusted by HAL::setTouchSampleRate(int8_t);
*
*/
struct rt_touch_data *read_data;
read_data = read_coordinate();
if (read_data->event == RT_TOUCH_EVENT_DOWN || read_data->event == RT_TOUCH_EVENT_MOVE)
{
x = read_data->x_coordinate;
y = read_data->y_coordinate;
return true;
}
else
{
return false;
}
}
烧录演示
