说一下本人粗看该章节之后的感想，很少会极其详细查看芯片的手册，只要在碰着难以办理的问题时，才会详细看芯片手册，但是有一点便是模块的内部架构及干系参数还是要大体理解的，实在和编程接口是干系的，如果不理解这些信息的话，虽然会利用API进行编程，但是实际一旦碰着问题是短缺理论支撑，排查问题就会难一些。
2. 设备宏开关在前面支持LCD的章节当中，实在PXP的设备宏开关就一起打开了。我们只要先把样例跑起来，就可以两个图像稠浊评估，即一秒内能做多少次两个满屏图像的稠浊。
3. 测试
在目录examples\peripheral\m105x\pxp\demo_pxp_blend.c 为默认支持RGB565的样例。把干系input/output参数改为支持RGB24的即可，须要把稳的话，对付PXP模块所须要input数据源为RGBA，它须要的时32位的数据，这个是须要把稳的地方，否则会产生非常。
4. 总结
PXP输入、输出的数据源格式是最主要的，否则花屏，闪屏的征象会涌现。希望大家别踏坑。本人设置的输入数据源为RGBA,输出为RGB.如下为笔者的测试代码。
/ AWorks ---------------------------- innovating embedded platform Copyright (c) 2001-2017 Guangzhou ZHIYUAN Electronics Co., Ltd. All rights reserved. Contact information: web site: http://www.zlg.cn e-mail: support@zlg.cn// \file \brief PXP像素处理例程 - 操作步骤： 1. 本例程需在aw_prj_params.h头文件里使能 - 显示屏设备宏 - 如果利用800 X 480显示屏，打开TEST_SCREEN_BIG，否则打开TEST_SCREEN_LITTER； 2. 连接串口设备 - 实验征象： 1.蓝色矩形和黄色矩形在屏幕上移动，交汇界面为白色。 /#include <stdio.h>#include <string.h>#include "aworks.h"#include "aw_delay.h"#include "aw_vdebug.h"#include "aw_fb.h"#include "aw_demo_config.h"#include "aw_cache.h"#include "aw_mem.h"#include "driver/pxp/awbl_imx1050_pxp.h"typedef struct pixel_24bpp { uint8_t b; uint8_t g; uint8_t r;uint8_t a;} pixel_24bpp_t;//#define TEST_SCREEN_BIG /800 X 480显示屏/#define TEST_SCREEN_LITTER /480 X 1920显示屏/#ifdef TEST_SCREEN_BIG#define __APP_IMG_HEIGHT 480#define __APP_IMG_WIDTH 800#else#define __APP_IMG_HEIGHT 1920#define __APP_IMG_WIDTH 480#endif/ 定义全局的 frame buffer 设备 /static aw_fb_fix_info_t __fix_screen_info;static aw_fb_var_info_t __var_info;static uint8_t __gp_ps_buf;static uint8_t __gp_as_buf;/ PXP 输出 buffer 配置. /static pxp_output_buffer_config_t __g_output_buffer_config;/像素深度/#define __APP_BPP 3#define __APP_PS_WIDTH (__APP_IMG_WIDTH / 2)#define __APP_PS_HEIGHT (__APP_IMG_HEIGHT / 2)#define __APP_AS_WIDTH (__APP_IMG_WIDTH / 2)#define __APP_AS_HEIGHT (__APP_IMG_HEIGHT / 2)#define __APP_PS_ULC_X ((__APP_IMG_WIDTH / 2) - (__APP_PS_SIZE / 2))#define __APP_PS_ULC_Y ((__APP_IMG_HEIGHT / 2) - (__APP_PS_SIZE / 2))#define __APP_PS_LRC_X ((__APP_IMG_WIDTH / 2) + (__APP_PS_SIZE / 2) - 1)static aw_err_t __fb_init (void){ void p_fb = aw_fb_open(DE_FB, 0); if (p_fb == NULL) { aw_kprintf("open fb fail.\r\n"); return -AW_ERROR; } / frame buffer 初始化 / aw_fb_init(p_fb); /frame buffer 设备信息货色/ aw_fb_ioctl(p_fb, AW_FB_CMD_GET_FINFO, &__fix_screen_info); aw_fb_ioctl(p_fb, AW_FB_CMD_GET_VINFO, &__var_info); / 设置背光亮度 / aw_fb_backlight(p_fb, 99); aw_fb_start(p_fb); / 初始化屏幕背景色(白色) / memset((void )__fix_screen_info.vram_addr, 0xFF, __var_info.buffer.buffer_size __var_info.buffer.buffer_num); return AW_OK;}static void __as_ps_buf_init (void){ uint32_t i, j; pixel_24bpp_t ps_buf = (pixel_24bpp_t )__gp_ps_buf; pixel_24bpp_t as_buf = (pixel_24bpp_t )__gp_as_buf; / The PS buffer is BLUE rectangle, the AS buffer is YELLOW rectangle. / for (i = 0; i < __APP_PS_HEIGHT; i++) { for (j = 0; j < __APP_PS_WIDTH; j++) { ps_buf[i __APP_PS_WIDTH + j].b = 0xFF; ps_buf[i __APP_PS_WIDTH + j].g = 0x00; ps_buf[i __APP_PS_WIDTH + j].r = 0x00; } } for (i = 0; i < __APP_AS_HEIGHT; i++) { for (j = 0; j < __APP_AS_WIDTH; j++) { as_buf[i __APP_AS_WIDTH + j].b = 0x00; as_buf[i __APP_AS_WIDTH + j].g = 0xFF; as_buf[i __APP_AS_WIDTH + j].r = 0xFF; } }}static void __app_pxp_config (void){ / PS configure. / const pxp_ps_buffer_config_t ps_buffer_config = { .pixel_format = kPXP_PsPixelFormatRGB888, .swap_byte = 0, .buffer_addr = (uint32_t)__gp_ps_buf, .buffer_addr_u = 0, .buffer_addr_v = 0, .pitch_bytes = __APP_PS_WIDTH __APP_BPP, }; / 复位PXP / pxp_hard_reset(); / 设置PS背景颜色 / pxp_set_process_surface_back_ground_color(0x00); / 配置PS buffer / pxp_set_process_surface_buffer_config(&ps_buffer_config); / AS config. / const pxp_as_buffer_config_t as_buffer_config = { .pixel_format = kPXP_AsPixelFormatRGB888, .buffer_addr = (uint32_t)__gp_as_buf, .pitch_bytes = __APP_AS_WIDTH __APP_BPP, }; /配置AS buffer/ pxp_set_alpha_surface_buffer_config(&as_buffer_config); /AS blend config/ const pxp_as_blend_config_t as_blend_config = { .alpha = 0, .invert_alpha = 0, .alpha_mode = kPXP_AlphaRop, .rop_mode = kPXP_RopMergeAs }; /设置AS blend/ pxp_set_alpha_surface_blend_config(&as_blend_config); / Output config. / __g_output_buffer_config.pixel_format = kPXP_OutputPixelFormatRGB888P; __g_output_buffer_config.interlaced_mode = kPXP_OutputProgressive; __g_output_buffer_config.buffer0_addr = (uint32_t)__fix_screen_info.vram_addr; __g_output_buffer_config.buffer1_addr = 0; __g_output_buffer_config.pitch_bytes = __APP_IMG_WIDTH 3; __g_output_buffer_config.width = __APP_IMG_WIDTH; __g_output_buffer_config.height = __APP_IMG_HEIGHT; /配置输出pxp buffer/ pxp_set_output_buffer_config(&__g_output_buffer_config); / 禁能 CSC1 / pxp_enable_csc1(0);}static void __app_blend (void){ uint8_t buf_index = 0U; /a pointer to a array/ uint8_t (p_vddr)[__APP_IMG_WIDTH __APP_IMG_HEIGHT __APP_BPP] = NULL; int8_t ps_inc_x = 1; int8_t ps_inc_y = 1; int8_t as_inc_x = -1; int8_t as_inc_y = -1; uint16_t ps_ulc_x = 0U; uint16_t ps_ulc_y = 0U; uint16_t as_ulc_x = __APP_IMG_WIDTH - __APP_AS_WIDTH; uint16_t as_ulc_y = __APP_IMG_HEIGHT - __APP_AS_HEIGHT; uint16_t ps_lrc_x, ps_lrc_y, as_lrc_x, as_lrc_y; ps_lrc_x = ps_ulc_x + __APP_PS_WIDTH - 1U; ps_lrc_y = ps_ulc_y + __APP_PS_HEIGHT - 1U; as_lrc_x = as_ulc_x + __APP_AS_WIDTH - 1U; as_lrc_y = as_ulc_y + __APP_AS_HEIGHT - 1U; p_vddr = (void )__fix_screen_info.vram_addr; while (1) { /将buffer放入缓存中/ aw_cache_flush((void )__gp_ps_buf, __APP_PS_HEIGHT __APP_PS_WIDTH __APP_BPP); aw_cache_flush((void )__gp_as_buf, __APP_AS_HEIGHT __APP_AS_WIDTH __APP_BPP); /PS图形位置/ pxp_set_process_surface_position(ps_ulc_x, ps_ulc_y, ps_lrc_x, ps_lrc_y); /AS图形位置/ pxp_set_alpha_surface_position(as_ulc_x, as_ulc_y, as_lrc_x, as_lrc_y); /配置输出buffer的显存地址/ __g_output_buffer_config.buffer0_addr = (uint32_t)p_vddr[buf_index]; pxp_set_output_buffer_config(&__g_output_buffer_config); / Start PXP. / pxp_start(); / 等待PXP图形处理完成 / pxp_complete_status_sync(); /清空缓存中的buffer/ aw_cache_invalidate((void )__gp_ps_buf, __APP_PS_HEIGHT __APP_PS_WIDTH __APP_BPP); aw_cache_invalidate((void )__gp_as_buf, __APP_AS_HEIGHT __APP_AS_WIDTH __APP_BPP); aw_cache_flush( (void)p_vddr[buf_index], __var_info.buffer.buffer_size __var_info.buffer.buffer_num); /切换显存/ buf_index++; if (buf_index >= __var_info.buffer.buffer_num) { buf_index = 0; } ps_lrc_x += ps_inc_x; ps_lrc_y += ps_inc_y; as_lrc_x += as_inc_x; as_lrc_y += as_inc_y; ps_ulc_x += ps_inc_x; ps_ulc_y += ps_inc_y; as_ulc_x += as_inc_x; as_ulc_y += as_inc_y; if (0 == as_ulc_x) { as_inc_x = 1; } else if (__APP_IMG_WIDTH - 1 == as_lrc_x) { as_inc_x = -1; } if (0 == as_ulc_y) { as_inc_y = 1; } else if (__APP_IMG_HEIGHT - 1 == as_lrc_y) { as_inc_y = -1; } if (0 == ps_ulc_x) { ps_inc_x = 1; } else if (__APP_IMG_WIDTH - 1 == ps_lrc_x) { ps_inc_x = -1; } if (0 == ps_ulc_y) { ps_inc_y = 1; } else if (__APP_IMG_HEIGHT - 1 == ps_lrc_y) { ps_inc_y = -1; } aw_mdelay(50); }}void demo_pxp_blend (void){ / 初始化fram buffer / aw_err_t ret = __fb_init(); if(ret != AW_OK){ aw_kprintf("fb init fail.\r\n"); return; } extern void lt9211_init();lt9211_init(); __gp_ps_buf = (uint8_t ) aw_mem_align(__APP_PS_WIDTH __APP_PS_HEIGHT __APP_BPP, AW_CACHE_LINE_SIZE); __gp_as_buf = (uint8_t ) aw_mem_align(__APP_AS_WIDTH __APP_AS_HEIGHT __APP_BPP, AW_CACHE_LINE_SIZE); if (NULL == __gp_ps_buf || __gp_as_buf == NULL) { aw_kprintf("aw_mem_align error.\r\n"); return ; } / 初始化buffer / __as_ps_buf_init(); / 配置pxp / __app_pxp_config(); / blend测试 / __app_blend(); aw_mem_free(__gp_ps_buf); aw_mem_free(__gp_as_buf);}/ end of file /
