【瑞萨RA8D1开发板，基于M85内核的图形MCU测评】+测试RGB屏幕

eew_7QI3Yq 发表于 2024-8-23 16:14

<div class='showpostmsg'>底板绘制好了，然后我们可以开始测试我们的接口了，先测试下我们的50P的RGB接口。

  

看下我们的接口我们默认的TCON是随便接的。然后我们现在只能是RGB666模式，有低位两个接地了。

  

看手册，我们是RGB666的大端接法，程序中不要错了。我们看下框架吧，我对RGB的驱动还是比较陌生的。

  

我理解Graphics 1和Graphics 2，两个是负责图像数据处理的，两个数据应该可以叠加显示，但目前我看都是用一个，只需要往Graphics 的data buffer里面填充数据，然后他就能刷新到我们屏幕上。

  

接下来就是进入e2 studio里面创建工程，实际我感觉用会e2 studio要方便很多。配置工程要用到的管脚。

  

配置有一个方便的功能，可以选择AB,这样下面的管脚选错就会报出来，我们用到的都是LCD_B的管脚，在管脚说明上也是有的。

  

然后配置下外部的SDRAM，不使用外部的SDRAM主要应该是怕缓存不够。

  

输入这里选择RGB565或者RGB888这种只是输入图像的数据，这里就决定了我们的图像到时候怎么拼接，送到我们的Graphics 的data buffer中。宽高和我们显示屏一致。

  

输出这里我们要配置我们屏幕的时序，然后什么样类型数据，是RGB格式还是BGR，因为存在这种比较方便我们布线，还有大小端。我们自然要配置大端RGB格式。

  

之后就是程序了，这里我用了下RA8D1的官方例程，每次实际就是用指针对里面数据进行更新。加人我们用的SDRAM驱动。同时控制背光脚，我们先不配置为PWM方式，我们改成直接IO输出方便测试。

  

直接上电就为高，方便测试。

  

接上屏幕可以直接看到显示，通过仿真我们也是可以看到图像数据的，主要就是那个buff。

  

  

仿真也是可以看到里面的数据。

主要代码：

<pre>
<code>#include "hal_data.h"
#include "glcdc_ep.h"

#include "board_sdram.h"

FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER

/* Variables to store resolution information */
uint16_t g_hz_size, g_vr_size;
/* Variables used for buffer usage */
uint32_t g_buffer_size;
uint8_t * g_p_single_buffer, * g_p_double_buffer;

#define RESET_VALUE (0x00)

static void screen_display(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint32_t color);

static void color_band_display(void);

/*******************************************************************************************************************//**
* main() is generated by the RA Configuration editor and is used to generate threads if an RTOS is used.This function
* is called by main() when no RTOS is used.
**********************************************************************************************************************/
void hal_entry(void)
{

fsp_err_t err = FSP_SUCCESS;
/* TODO: add your own code here */

#if BSP_TZ_SECURE_BUILD
/* Enter non-secure code */
R_BSP_NonSecureEnter();
#endif

bsp_sdram_init();

/* Get LCDC configuration */
g_hz_size = (g_display_cfg.input.hsize);
g_vr_size = (g_display_cfg.input.vsize);
/* Initialize buffer pointers */
g_buffer_size = (uint32_t) (g_hz_size * g_vr_size * BYTES_PER_PIXEL);
g_p_single_buffer = (uint8_t *) g_display_cfg.input.p_base;
/* Double buffer for drawing color bands with good quality */
g_p_double_buffer = g_p_single_buffer + g_buffer_size;

/* Initialize GLCDC driver */
err = R_GLCDC_Open(&g_display_ctrl, &g_display_cfg);

/* Initialize GLCDC driver */
err = R_GLCDC_Open(&g_display_ctrl, &g_display_cfg);
/* Handle error */
// if(FSP_SUCCESS != err)
// {
// /* GLCDC initialization failed*/
// APP_ERR_PRINT("\r\n ** GLCDC driver initialization FAILED ** \r\n");
// APP_ERR_TRAP(err);
// }

/* Start GLCDC display output */
err = R_GLCDC_Start(&g_display_ctrl);
/* Handle error */
// if(FSP_SUCCESS != err)
// {
// /* GLCDC initialization failed*/
// APP_ERR_PRINT("\r\n ** GLCDC driver start FAILED ** \r\n");
// APP_ERR_TRAP(err);
// }

/* Clear LCD screen using appropriate co-ordinates */
screen_display((uint16_t)X1_CO_ORDINATE, (uint16_t)Y1_CO_ORDINATE, g_hz_size, g_vr_size, BLACK);

/* Display color bands on LCD screen */
color_band_display();

}

/*******************************************************************************************************************//**
* This function is called at various points during the startup process.This implementation uses the event that is
* called right before main() to set up the pins.
*
* @paramevent Where at in the start up process the code is currently at
**********************************************************************************************************************/
void R_BSP_WarmStart(bsp_warm_start_event_t event)
{
if (BSP_WARM_START_RESET == event)
{
#if BSP_FEATURE_FLASH_LP_VERSION != 0

 /* Enable reading from data flash. */
 R_FACI_LP->DFLCTL = 1U;

 /* Would normally have to wait tDSTOP(6us) for data flash recovery. Placing the enable here, before clock and
 * C runtime initialization, should negate the need for a delay since the initialization will typically take more than 6us. */
#endif
}

if (BSP_WARM_START_POST_C == event)
{
 /* C runtime environment and system clocks are setup. */

 /* Configure pins. */
 R_IOPORT_Open (&IOPORT_CFG_CTRL, &IOPORT_CFG_NAME);

#if BSP_CFG_SDRAM_ENABLED

 /* Setup SDRAM and initialize it. Must configure pins first. */
 R_BSP_SdramInit(true);
#endif
}
}

static void screen_display(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint32_t color)
{
/*Declare local variables */
uint16_t start_x, start_y, display_length, display_height;
uint32_t start_addr;

/* Assign co-ordinate values and calculate start address */
start_x = x1;
start_y = y1;
start_addr = (uint32_t)((start_x * BYTES_PER_PIXEL) + (start_y * g_hz_size* BYTES_PER_PIXEL));

/* Calculate display box length and height */
display_length = (uint16_t)((x2 - x1) * BYTES_PER_PIXEL);
display_height = (y2 - y1);

/* Display required color band */
for(uint16_t ver_value = Y1_CO_ORDINATE; ver_value < (display_height - INC_DEC_VALUE); ver_value++)
{
 for(uint32_t hor_value = start_addr; hor_value < (start_addr + display_length); hor_value += BYTES_PER_PIXEL)
 {
 *(uint32_t *) (g_p_single_buffer + hor_value) = color;
 *(uint32_t *) (g_p_double_buffer + hor_value) = color;
 }
 start_addr = (uint32_t)(start_addr + (g_hz_size * BYTES_PER_PIXEL));
}
}

static void color_band_display(void)
{

uint16_t color= {RED, GREEN, BLUE, BLACK, WHITE, YELLOW, MAGENTA, CYAN};

uint16_t width = g_vr_size/COLOR_BAND_COUNT;

for (uint8_t display_count = RESET_VALUE; display_count < COLOR_BAND_COUNT; display_count++)
{
 screen_display((uint16_t)X1_CO_ORDINATE, (display_count * width), g_hz_size, (uint16_t)(((display_count * width) + width) + INC_DEC_VALUE), color);
}

}

#if BSP_TZ_SECURE_BUILD

FSP_CPP_HEADER
BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ();

/* Trustzone Secure Projects require at least one nonsecure callable function in order to build (Remove this if it is not required to build). */
BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ()
{

}
FSP_CPP_FOOTER

#endif
</code></pre>

 
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eew_7QI3Yq 发表于 2024-8-23 16:16

秦天qintian0303 发表于 2024-8-24 10:01

这测试板比软件更加费劲

eew_7QI3Yq 发表于 2024-8-24 22:57

秦天qintian0303 发表于 2024-8-24 10:01
这测试板比软件更加费劲  

都难，硬件花时间规划，想啥都加，软件就是要深入去了解。

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【瑞萨RA8D1开发板，基于M85内核的图形MCU测评】+测试RGB屏幕