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98 lines
2.6 KiB
Markdown
98 lines
2.6 KiB
Markdown
## 将AWTK移植到STM32f429igtx裸系统
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AWTK的可移植性很高，在移植时只需要实现平台初始化、lcd和mainloop三个方面的东西。本文以STM32f429igtx为例介绍移植AWTK到新平台的过程。
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### 一、平台初始化
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除了基本的libc函数外，AWTK对平台没有特别要求，实现获取当前时间的函数get\_time\_ms64和sleep_ms函数即可。另外需要给GUI分配一块内存空间，并调用tk\_mem\_init。
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```
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uint32_t get_time_ms64() {
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return HAL_GetTick();
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}
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void sleep_ms(uint32_t ms) {
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delay_ms(ms);
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}
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#define MEM2_MAX_SIZE 28912 * 1024
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#define MEM2_ADDR (uint8_t*)0XC01F4000
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ret_t platform_prepare(void) {
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tk_mem_init(MEM2_ADDR, MEM2_MAX_SIZE);
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return RET_OK;
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}
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```
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> 参考：awtk-port/platform.c
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### 二、实现lcd
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stm32f429igtx使用基于framebuffer的lcd的缺省实现，只需要调用函数lcd\_mem\_create\_double\_fb即可。
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```
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extern u32 *ltdc_framebuf[2];
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#define online_fb_addr (uint8_t*)ltdc_framebuf[0]
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#define offline_fb_addr (uint8_t*)ltdc_framebuf[1]
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lcd_t* platform_create_lcd(wh_t w, wh_t h) {
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return lcd_mem_create_double_fb(lcdltdc.pwidth, lcdltdc.pheight, online_fb_addr, offline_fb_addr);
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}
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```
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> 参考 awtk-port/main\_loop\_stm32\_raw.c
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### 三、实现main\_loop
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main\_loop主要负责事件分发和绘制这个不断循环的过程。main\_loop\_raw.inc里实现了裸系统main\_loop的基本功能，在移植时加上输入事件的的分发即可：
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```
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#include "base/g2d.h"
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#include "base/idle.h"
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#include "base/timer.h"
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#include "lcd/lcd_mem_rgb565.h"
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#include "main_loop/main_loop_simple.h"
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extern u32 *ltdc_framebuf[2];
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#define online_fb_addr (uint8_t*)ltdc_framebuf[0]
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#define offline_fb_addr (uint8_t*)ltdc_framebuf[1]
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uint8_t platform_disaptch_input(main_loop_t* loop) {
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int x = 0;
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int y = 0;
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uint8_t key = KEY_Scan(0);
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tp_dev.scan(0);
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x = tp_dev.x[0];
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y = tp_dev.y[0];
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y = lcdltdc.pheight - tp_dev.x[0];
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x = tp_dev.y[0];
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if(tp_dev.sta&TP_PRES_DOWN){
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main_loop_post_pointer_event(loop, TRUE, x, y);
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} else {
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main_loop_post_pointer_event(loop, FALSE, x, y);
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}
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return 0;
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}
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lcd_t* platform_create_lcd(wh_t w, wh_t h) {
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return lcd_mem_rgb565_create_double_fb(w, h, online_fb_addr, offline_fb_addr);
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}
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#include "main_loop/main_loop_raw.inc"
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```
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> 参考 awtk-port/main\_loop\_stm32\_raw.c
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注：[正点原子的开发实验板](https://item.taobao.com/item.htm?spm=a1z10.1-c-s.w11877762-18401048725.10.145a2276IsywTF&id=534585837612)为载体移植，其它开发板应该差不多。
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完整项目和源码请参考：[awtk-stm32f429igtx-raw](https://github.com/zlgopen/awtk-stm32f429igtx-raw)
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