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[应用相关] 通过FSMC驱动Ilitek ILI9325液晶屏以及XPT2046触控芯片

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 楼主| 4y1b3 发表于 2023-5-25 19:22 | 显示全部楼层 |阅读模式
FSMC, ILI9325, Lite, SMC, TE
STM32F407VE单片机通过FSMC驱动Ilitek ILI9325液晶屏以及XPT2046触控芯片
本程序使用的单片机为STM32F407VE，晶振大小为8MHz，用10厘米长的杜邦线和彩屏相连，彩屏为微雪（Waveshare）的3.2inch 320x240 ILI9325 Touch LCD (C)。

程序下载地址：


https://pan.baidu.com/s/1LVQRdv3jZ9n5oAR_7yUZxw（提取码：awib）


（程序里面注释FSMC_D16=>RS写错了，应该是A16才对，D没有16）

运行程序时如果发现LCD ID（0号寄存器）读出来是0，说明很有可能你的彩屏的芯片不是ILI9325，而是ILI9341。ILI9341的0号命令是空操作，是读不出来ID的，而且读写屏幕的代码也有很大的差别。
关于ILI9341彩屏的驱动请参阅：
https://blog.csdn.net/ZLK1214/article/details/107144250









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 楼主| 4y1b3 发表于 2023-5-25 19:23 | 显示全部楼层
98499646f451439050.png

连线时，最上排的GND 5V-IN不接，由于U1和U2没有焊，所以单片机无法控制背光开启和关闭，不用接BL-VCC以及旁边的GND、NC和BL-VTRL。电源只接最后一排的GND和3V3。
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lidi911 发表于 2023-5-25 19:25 来自手机 | 显示全部楼层
搞个GBA游戏模拟器还是不错的。
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 楼主| 4y1b3 发表于 2023-5-26 14:32 | 显示全部楼层
触摸芯片引脚：
TP-IRQ=>PC4（中断引脚，低电平有效，按一次触发一次）
TP-SCK=>PA5
TP-CS=>PA4
TP-SDO=>PA6
TP-SDI=>PA7
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 楼主| 4y1b3 发表于 2023-5-26 22:04 | 显示全部楼层
FSMC引脚：
D0~15是FSMC的16位并行数据线。LCD-CS接PD7，WR接PD5，RST接PD12。
RS接PD11（FSMC_A16），RD接PD4（FSMC_NOE），这两个引脚很容易混淆，千万不要接反了！！！接反了虽然能读出来0号寄存器为0x9325，但是后面的操作都是无效的，程序虽正确但屏幕一直为白屏。
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 楼主| 4y1b3 发表于 2023-5-26 22:05 | 显示全部楼层
790716470bc79d918c.png
用杜邦线连接彩屏会有一定概率出现传输错误。在示例程序中先显示了一张图片，然后再从屏幕中读回来，检查就会发现其中有极个别字节和原来的图像数据不一致。将FSMC的AddressHoldTime和DataSetupTime改到最大就没有错误了，不过刷屏的速率很慢。
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 楼主| 4y1b3 发表于 2023-5-26 22:18 | 显示全部楼层
【主要代码】

main.c：
复制
  1. #include <stdio.h>
    

  2. #include <stm32f4xx.h>
    

  3. #include <string.h>
    

  4. #include "common.h"
    

  5. #include "images.h"
    

  6. #include "ILI9325.h"
    

  7. #include "XPT2046.h"
    

  8.  
    

  9. static void check_display(const void *image, int x, int y, int width, int height)
    

  10. {
    

  11.   int i, j, curr;
    

  12.   int err = 0, count = 0;
    

  13.   uint16_t pixels[50];
    

  14.   
    

  15.   for (i = 0; i < height; i++)
    

  16.   {
    

  17.     for (j = 0; j < width; j += curr)
    

  18.     {
    

  19.       curr = _countof(pixels);
    

  20.       if (curr > width - j)
    

  21.         curr = width - j;
    

  22.       
    

  23.       ILI9325_GetPixelsInRect(pixels, x + j, y + i, curr, 1);
    

  24.       if (memcmp(pixels, (uint16_t *)image + i * width + j, curr * sizeof(uint16_t)) != 0)
    

  25.         err++;
    

  26.       count++;
    

  27.     }
    

  28.   }
    

  29.   if (err == 0)
    

  30.     printf("Display OK!\n");
    

  31.   else
    

  32.   {
    

  33.     // 使用杜邦线连接彩屏时, 有可能会有个别字节传输出错
    

  34.     // 将FSMC的AddressHoldTime和DataSetupTime改大可以降低错误率
    

  35.     printf("Display error! err/count=%d/%d\n", err, count);
    

  36.   }
    

  37. }
    

  38.  
    

  39. int main(void)
    

  40. {
    

  41.   int x, y;
    

  42.   
    

  43.   HAL_Init();
    

  44.   
    

  45.   clock_init();
    

  46.   usart_init(115200);
    

  47.   printf("STM32F407VE FSMC ILI9325\n");
    

  48.   printf("SystemCoreClock=%u\n", SystemCoreClock);
    

  49.   
    

  50.   ILI9325_Init(); // 初始化彩屏
    

  51.   ILI9325_Clear(ILI9325_COLOR_RED); // 背景色刷为红色
    

  52.   
    

  53.   XPT2046_Init(); // 初始化触控
    

  54.   
    

  55.   // 彩屏的坐标轴方向: 短边为x轴, 长边为y轴
    

  56.   // 图片myimage是逆时针旋转了90度后转换成数组的
    

  57.   HAL_Delay(1000);
    

  58.   ILI9325_DrawImage(myimage, 0, 36, _countof(myimage[0]), _countof(myimage)); // 在屏幕上显示一张图片
    

  59.   check_display(myimage, 0, 36, _countof(myimage[0]), _countof(myimage)); // 检查是否显示正确
    

  60.   
    

  61.   while (1)
    

  62.   {
    

  63.     // 每按一下, 触发一次中断
    

  64.     if (XPT2046_GetITStatus())
    

  65.     {
    

  66.       XPT2046_ReadPosition(&x, &y);
    

  67.       printf("(%d,%d)\n", x, y);
    

  68.       ILI9325_SetPixel(x, y, 0x4010);
    

  69.     }
    

  70.   }
    

  71. }
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 楼主| 4y1b3 发表于 2023-5-26 22:20 | 显示全部楼层
ILI9325.c：
复制
  1. #include <stdio.h>
    

  2. #include <stm32f4xx.h>
    

  3. #include "ILI9325.h"
    

  4.  
    

  5. // 因为彩屏背面的U1和U2这两个集成电路没有焊, 所以无法通过BL-VTRL引脚控制背光
    

  6. // 本程序不进行背光控制, 只进行复位控制
    

  7. #define RST_OFF HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_SET)
    

  8. #define RST_ON HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_RESET)
    

  9.  
    

  10. NOR_HandleTypeDef hnor;
    

  11.  
    

  12. /* 清屏 */
    

  13. void ILI9325_Clear(uint16_t color)
    

  14. {
    

  15.   int i = ILI9325_CX * ILI9325_CY;
    

  16.   
    

  17.   ILI9325_SetRegion(0, 0, ILI9325_CX - 1, ILI9325_CY - 1);
    

  18.   ILI9325_CMD = ILI9325_CMD_MEMORY_WRITE;
    

  19.   while (i--)
    

  20.     ILI9325_DATA = color;
    

  21. }
    

  22.  
    

  23. /* 显示图片 */
    

  24. void ILI9325_DrawImage(const void *image, uint16_t x, uint16_t y, uint16_t width, uint16_t height)
    

  25. {
    

  26.   const uint16_t *p = image;
    

  27.   int i = width * height;
    

  28.   
    

  29.   ILI9325_SetRegion(x, y, x + width - 1, y + height - 1);
    

  30.   ILI9325_CMD = ILI9325_CMD_MEMORY_WRITE;
    

  31.   while (i--)
    

  32.     ILI9325_DATA = *p++;
    

  33. }
    

  34.  
    

  35. /* 读取指定区域的屏幕显示内容 */
    

  36. void ILI9325_GetPixelsInRect(void *pixels, uint16_t x, uint16_t y, uint16_t width, uint16_t height)
    

  37. {
    

  38.   int i, j;
    

  39.   uint16_t *p = pixels;
    

  40.   
    

  41.   for (i = 0; i < height; i++)
    

  42.   {
    

  43.     for (j = 0; j < width; j++)
    

  44.     {
    

  45.       // 手册上有这句话: The address counter is not automatically updated when read data from the internal GRAM
    

  46.       // 也就是说读数据的时候光标不能自己移动
    

  47.       ILI9325_SetPos(x + j, y + i);
    

  48.       ILI9325_CMD = ILI9325_CMD_MEMORY_READ;
    

  49.       ILI9325_DATA; // dummy read
    

  50.       *p++ = ILI9325_DATA;
    

  51.     }
    

  52.   }
    

  53. }
    

  54.  
    

  55. /* 初始化显示屏 */
    

  56. void ILI9325_Init(void)
    

  57. {
    

  58.   uint16_t id;
    

  59.   FSMC_NORSRAM_TimingTypeDef timing = {0};
    

  60.   GPIO_InitTypeDef gpio;
    

  61.   
    

  62.   __HAL_RCC_FSMC_CLK_ENABLE();
    

  63.   __HAL_RCC_GPIOD_CLK_ENABLE();
    

  64.   __HAL_RCC_GPIOE_CLK_ENABLE();
    

  65.   
    

  66.   // PD12: RST
    

  67.   RST_ON;
    

  68.   gpio.Mode = GPIO_MODE_OUTPUT_PP;
    

  69.   gpio.Pin = GPIO_PIN_12;
    

  70.   gpio.Pull = GPIO_NOPULL;
    

  71.   gpio.Speed = GPIO_SPEED_FREQ_HIGH;
    

  72.   HAL_GPIO_Init(GPIOD, &gpio);
    

  73.   
    

  74.   // PD0~1: FSMC_D2~3, PD4: FSMC_NOE, PD5: FSMC_NWE, PD7: FSMC_NE1, PD8~11: FSMC_D13~16, PD14~15: FSMC_D0~1
    

  75.   // FSMC_NOE=>RD, FSMC_NWE=>WR, FSMC_D16=>RS, FSMC_NE1=>CS
    

  76.   gpio.Alternate = GPIO_AF12_FSMC;
    

  77.   gpio.Mode = GPIO_MODE_AF_PP;
    

  78.   gpio.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_7 | GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_14 | GPIO_PIN_15;
    

  79.   gpio.Pull = GPIO_NOPULL;
    

  80.   gpio.Speed = GPIO_SPEED_FREQ_HIGH;
    

  81.   HAL_GPIO_Init(GPIOD, &gpio);
    

  82.   
    

  83.   // PE7~15: FSMC_D4~12
    

  84.   gpio.Pin = GPIO_PIN_7 | GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
    

  85.   HAL_GPIO_Init(GPIOE, &gpio);
    

  86.   
    

  87.   // FSMC一共有6种模式：模式1~2和模式A~D
    

  88.   // 彩屏使用的是模式2(即NOR Flash模式)而非模式B，这是因为配置FSMC时并没有使能扩展模式
    

  89.   hnor.Extended = FSMC_Bank1E;
    

  90.   hnor.Instance = FSMC_Bank1;
    

  91.   hnor.Init.MemoryDataWidth = FSMC_NORSRAM_MEM_BUS_WIDTH_16;
    

  92.   hnor.Init.MemoryType = FSMC_MEMORY_TYPE_NOR;
    

  93.   hnor.Init.NSBank = FSMC_NORSRAM_BANK1;
    

  94.   hnor.Init.WriteOperation = FSMC_WRITE_OPERATION_ENABLE;
    

  95.   timing.AddressHoldTime = 1;
    

  96.   timing.AddressSetupTime = 0;
    

  97.   timing.CLKDivision = 2;
    

  98.   timing.DataLatency = 2;
    

  99.   timing.DataSetupTime = 7;
    

  100.   HAL_NOR_Init(&hnor, &timing, NULL);
    

  101.   
    

  102.   HAL_Delay(1);
    

  103.   RST_OFF;
    

  104.   HAL_Delay(1);
    

  105.   
    

  106.   ILI9325_CMD = 0;
    

  107.   id = ILI9325_DATA;
    

  108.   printf("LCD ID: 0x%04x\n", id);
    

  109.   
    

  110.   // Set SRAM internal timing
    

  111.   ILI9325_CMD = 0xe5;
    

  112.   ILI9325_DATA = 0x78f0;
    

  113.   // Set Driver Output Control
    

  114.   ILI9325_CMD = 0x01;
    

  115.   ILI9325_DATA = 0x0100;
    

  116.   // Set 1 line inversion
    

  117.   ILI9325_CMD = 0x02;
    

  118.   ILI9325_DATA = 0x0700;
    

  119.   // Set GRAM write direction and BGR=1
    

  120.   ILI9325_CMD = 0x03;
    

  121.   ILI9325_DATA = 0x1030; // 设置扫描方向
    

  122.   // Resize register
    

  123.   ILI9325_CMD = 0x04;
    

  124.   ILI9325_DATA = 0x0000;
    

  125.   // Set the back porch and front porch
    

  126.   ILI9325_CMD = 0x08;
    

  127.   ILI9325_DATA = 0x0207;
    

  128.   // Set non-display area refresh cycle ISC[3:0]
    

  129.   ILI9325_CMD = 0x09;
    

  130.   ILI9325_DATA = 0x0000;
    

  131.   // FMARK function
    

  132.   ILI9325_CMD = 0x0a;
    

  133.   ILI9325_DATA = 0x0000;
    

  134.   // RGB interface setting
    

  135.   ILI9325_CMD = 0x0c;
    

  136.   ILI9325_DATA = 0x0000;
    

  137.   // Frame marker Position
    

  138.   ILI9325_CMD = 0x0d;
    

  139.   ILI9325_DATA = 0x0000;
    

  140.   // RGB interface polarity
    

  141.   ILI9325_CMD = 0x0f;
    

  142.   ILI9325_DATA = 0x0000;
    

  143.  
    

  144.   // Power On sequence
    

  145.   // SAP, BT[3:0], AP, DSTB, SLP, STB
    

  146.   ILI9325_CMD = 0x10;
    

  147.   ILI9325_DATA = 0x0000;
    

  148.   // DC1[2:0], DC0[2:0], VC[2:0]
    

  149.   ILI9325_CMD = 0x11;
    

  150.   ILI9325_DATA = 0x0007;
    

  151.   // VREG1OUT voltage
    

  152.   ILI9325_CMD = 0x12;
    

  153.   ILI9325_DATA = 0x0000;
    

  154.   // VDV[4:0] for VCOM amplitude
    

  155.   ILI9325_CMD = 0x13;
    

  156.   ILI9325_DATA = 0x0000;
    

  157.   ILI9325_CMD = 0x07;
    

  158.   ILI9325_DATA = 0x0001;
    

  159.   HAL_Delay(20);
    

  160.  
    

  161.   // Dis-charge capacitor power voltage
    

  162.   // SAP, BT[3:0], AP, DSTB, SLP, STB
    

  163.   // Set DC1[2:0], DC0[2:0], VC[2:0]
    

  164.   ILI9325_CMD = 0x10;
    

  165.   ILI9325_DATA = 0x1090;
    

  166.   ILI9325_CMD = 0x11;
    

  167.   ILI9325_DATA = 0x0227;
    

  168.   ILI9325_CMD = 0x12;
    

  169.   ILI9325_DATA = 0x001f;
    

  170.   // VDV[4:0] for VCOM amplitude
    

  171.   ILI9325_CMD = 0x13;
    

  172.   ILI9325_DATA = 0x1500;
    

  173.   // 04 VCM[5:0] for VCOMH
    

  174.   ILI9325_CMD = 0x29;
    

  175.   ILI9325_DATA = 0x0027;
    

  176.   // Set Frame Rate
    

  177.   ILI9325_CMD = 0x2b;
    

  178.   ILI9325_DATA = 0x000d;
    

  179.  
    

  180.   // Adjust the Gamma Curve
    

  181.   ILI9325_CMD = 0x30;
    

  182.   ILI9325_DATA = 0x0000;
    

  183.   ILI9325_CMD = 0x31;
    

  184.   ILI9325_DATA = 0x0603;
    

  185.   ILI9325_CMD = 0x32;
    

  186.   ILI9325_DATA = 0x0206;
    

  187.   ILI9325_CMD = 0x35;
    

  188.   ILI9325_DATA = 0x0206;
    

  189.   ILI9325_CMD = 0x36;
    

  190.   ILI9325_DATA = 0x0004;
    

  191.   ILI9325_CMD = 0x37;
    

  192.   ILI9325_DATA = 0x0105;
    

  193.   ILI9325_CMD = 0x38;
    

  194.   ILI9325_DATA = 0x0401;
    

  195.   ILI9325_CMD = 0x39;
    

  196.   ILI9325_DATA = 0x0707;
    

  197.   ILI9325_CMD = 0x3c;
    

  198.   ILI9325_DATA = 0x0602;
    

  199.   ILI9325_CMD = 0x3d;
    

  200.   ILI9325_DATA = 0x0004;
    

  201.  
    

  202.   // Gate Scan Line
    

  203.   ILI9325_CMD = 0x60;
    

  204.   ILI9325_DATA = 0xa700;
    

  205.   // NDL, VLE, REV
    

  206.   ILI9325_CMD = 0x61;
    

  207.   ILI9325_DATA = 0x0001;
    

  208.   // Set scrolling line
    

  209.   ILI9325_CMD = 0x6a;
    

  210.   ILI9325_DATA = 0x0000;
    

  211.  
    

  212.   // Partial Display Control
    

  213.   ILI9325_CMD = 0x80;
    

  214.   ILI9325_DATA = 0x0000;
    

  215.   ILI9325_CMD = 0x81;
    

  216.   ILI9325_DATA = 0x0000;
    

  217.   ILI9325_CMD = 0x82;
    

  218.   ILI9325_DATA = 0x0000;
    

  219.   ILI9325_CMD = 0x83;
    

  220.   ILI9325_DATA = 0x0000;
    

  221.   ILI9325_CMD = 0x84;
    

  222.   ILI9325_DATA = 0x0000;
    

  223.   ILI9325_CMD = 0x85;
    

  224.   ILI9325_DATA = 0x0000;
    

  225.   
    

  226.   // Panel Control
    

  227.   ILI9325_CMD = 0x90;
    

  228.   ILI9325_DATA = 0x0010;
    

  229.   ILI9325_CMD = 0x92;
    

  230.   ILI9325_DATA = 0x0600;
    

  231.   
    

  232.   // 262K color and display ON
    

  233.   ILI9325_CMD = 0x07;
    

  234.   ILI9325_DATA = 0x0133;
    

  235. }
    

  236.  
    

  237. /* 绘制像素点 */
    

  238. void ILI9325_SetPixel(uint16_t x, uint16_t y, uint16_t color)
    

  239. {
    

  240.   ILI9325_SetRegion(x, y, x, y);
    

  241.   ILI9325_CMD = ILI9325_CMD_MEMORY_WRITE;
    

  242.   ILI9325_DATA = color;
    

  243. }
    

  244.  
    

  245. /* 设置绘图位置 */
    

  246. void ILI9325_SetPos(uint16_t x, uint16_t y)
    

  247. {
    

  248.   ILI9325_CMD = ILI9325_CMD_HORIZONTAL_GRAM_ADDRESS_SET;
    

  249.   ILI9325_DATA = x;
    

  250.   ILI9325_CMD = ILI9325_CMD_VERTICAL_GRAM_ADDRESS_SET;
    

  251.   ILI9325_DATA = y;
    

  252. }
    

  253.  
    

  254. /* 设置显示区域 */
    

  255. void ILI9325_SetRegion(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1)
    

  256. {
    

  257.   ILI9325_CMD = ILI9325_CMD_HORIZONTAL_ADDRESS_START_POSITION;
    

  258.   ILI9325_DATA = x0;
    

  259.   ILI9325_CMD = ILI9325_CMD_VERTICAL_ADDRESS_START_POSITION;
    

  260.   ILI9325_DATA = y0;
    

  261.   
    

  262.   ILI9325_CMD = ILI9325_CMD_HORIZONTAL_ADDRESS_END_POSITION;
    

  263.   ILI9325_DATA = x1;
    

  264.   ILI9325_CMD = ILI9325_CMD_VERTICAL_ADDRESS_END_POSITION;
    

  265.   ILI9325_DATA = y1;
    

  266.   
    

  267.   ILI9325_SetPos(x0, y0);
    

  268. }
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 楼主| 4y1b3 发表于 2023-5-26 22:21 | 显示全部楼层
ILI9325.h：
复制
  1. #ifndef _ILI9325_H
    

  2. #define _ILI9325_H
    

  3.  
    

  4. #define ILI9325_CX 240
    

  5. #define ILI9325_CY 320
    

  6.  
    

  7. #define ILI9325_COLOR_BLACK 0x0000
    

  8. #define ILI9325_COLOR_BLUE 0x001f
    

  9. #define ILI9325_COLOR_GREEN 0x07e0
    

  10. #define ILI9325_COLOR_RED 0xf800
    

  11. #define ILI9325_COLOR_WHITE 0xffff
    

  12.  
    

  13. #define ILI9325_CMD (*(volatile uint16_t *)0x60000000)
    

  14. #define ILI9325_DATA (*(volatile uint16_t *)0x60020000)
    

  15.  
    

  16. #define ILI9325_CMD_HORIZONTAL_GRAM_ADDRESS_SET 0x20
    

  17. #define ILI9325_CMD_VERTICAL_GRAM_ADDRESS_SET 0x21
    

  18. #define ILI9325_CMD_MEMORY_WRITE 0x22
    

  19. #define ILI9325_CMD_MEMORY_READ 0x22
    

  20. #define ILI9325_CMD_HORIZONTAL_ADDRESS_START_POSITION 0x50
    

  21. #define ILI9325_CMD_HORIZONTAL_ADDRESS_END_POSITION 0x51
    

  22. #define ILI9325_CMD_VERTICAL_ADDRESS_START_POSITION 0x52
    

  23. #define ILI9325_CMD_VERTICAL_ADDRESS_END_POSITION 0x53
    

  24.  
    

  25. #define ILI9325_RGB888_TO_565(color) ((((color) >> 8) & 0xf800) | (((color) >> 5) & 0x7e0) | (((color) >> 3) & 0x1f))
    

  26.  
    

  27. void ILI9325_Clear(uint16_t color);
    

  28. void ILI9325_DrawImage(const void *image, uint16_t x, uint16_t y, uint16_t width, uint16_t height);
    

  29. void ILI9325_GetPixelsInRect(void *pixels, uint16_t x, uint16_t y, uint16_t width, uint16_t height);
    

  30. void ILI9325_Init(void);
    

  31. void ILI9325_SetPixel(uint16_t x, uint16_t y, uint16_t color);
    

  32. void ILI9325_SetPos(uint16_t x, uint16_t y);
    

  33. void ILI9325_SetRegion(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1);
    

  34.  
    

  35. #endif
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 楼主| 4y1b3 发表于 2023-5-26 22:22 | 显示全部楼层
XPT2046.c：
复制
  1. #include <stdio.h>
    

  2. #include <stm32f4xx.h>
    

  3. #include "XPT2046.h"
    

  4.  
    

  5. #define SCREEN_WIDTH 240
    

  6. #define SCREEN_HEIGHT 320
    

  7. #define TOUCH_LEFT 385
    

  8. #define TOUCH_RIGHT 3439
    

  9. #define TOUCH_TOP 575
    

  10. #define TOUCH_BOTTOM 3586
    

  11.  
    

  12. #define CS_0 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET)
    

  13. #define CS_1 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET)
    

  14.  
    

  15. SPI_HandleTypeDef hspi1;
    

  16.  
    

  17. int XPT2046_GetITStatus(void)
    

  18. {
    

  19.   return HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_4) == GPIO_PIN_RESET;
    

  20. }
    

  21.  
    

  22. void XPT2046_Init(void)
    

  23. {
    

  24.   GPIO_InitTypeDef gpio;
    

  25.   
    

  26.   __HAL_RCC_GPIOA_CLK_ENABLE();
    

  27.   __HAL_RCC_GPIOC_CLK_ENABLE();
    

  28.   __HAL_RCC_SPI1_CLK_ENABLE();
    

  29.   
    

  30.   CS_1;
    

  31.   gpio.Mode = GPIO_MODE_OUTPUT_PP;
    

  32.   gpio.Pin = GPIO_PIN_4;
    

  33.   gpio.Pull = GPIO_NOPULL;
    

  34.   gpio.Speed = GPIO_SPEED_FREQ_HIGH;
    

  35.   HAL_GPIO_Init(GPIOA, &gpio);
    

  36.   
    

  37.   gpio.Alternate = GPIO_AF5_SPI2;
    

  38.   gpio.Mode = GPIO_MODE_AF_PP;
    

  39.   gpio.Pin = GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7;
    

  40.   gpio.Pull = GPIO_NOPULL;
    

  41.   gpio.Speed = GPIO_SPEED_FREQ_HIGH;
    

  42.   HAL_GPIO_Init(GPIOA, &gpio);
    

  43.   
    

  44.   gpio.Mode = GPIO_MODE_INPUT;
    

  45.   gpio.Pin = GPIO_PIN_4;
    

  46.   gpio.Pull = GPIO_PULLUP;
    

  47.   HAL_GPIO_Init(GPIOC, &gpio);
    

  48.   
    

  49.   hspi1.Instance = SPI1;
    

  50.   hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
    

  51.   hspi1.Init.Mode = SPI_MODE_MASTER;
    

  52.   hspi1.Init.NSS = SPI_NSS_SOFT;
    

  53.   HAL_SPI_Init(&hspi1);
    

  54. }
    

  55.  
    

  56. uint16_t XPT2046_Read(uint8_t cmd)
    

  57. {
    

  58.   uint8_t data[3] = {cmd};
    

  59.   
    

  60.   CS_0;
    

  61.   HAL_SPI_TransmitReceive(&hspi1, data, data, sizeof(data), HAL_MAX_DELAY);
    

  62.   CS_1;
    

  63.   return ((data[1] << 5) | (data[2] >> 3)) & 0xfff;
    

  64. }
    

  65.  
    

  66. void XPT2046_ReadPosition(int *x, int *y)
    

  67. {
    

  68.   float k, b;
    

  69.   int i;
    

  70.   uint32_t value_x = 0, value_y = 0;
    

  71.   
    

  72.   for (i = 0; i < 50; i++)
    

  73.   {
    

  74.     value_x += XPT2046_Read(XPT2046_READX);
    

  75.     value_y += XPT2046_Read(XPT2046_READY);
    

  76.   }
    

  77.   value_x /= i;
    

  78.   value_y /= i;
    

  79.   printf("value_x=%u, value_y=%u\n", value_x, value_y);
    

  80.   
    

  81.   k = (float)SCREEN_WIDTH / (TOUCH_RIGHT - TOUCH_LEFT);
    

  82.   b = -k * TOUCH_LEFT;
    

  83.   *x = k * value_x + b;
    

  84.   if (*x < 0)
    

  85.     *x = 0;
    

  86.   else if (*x > SCREEN_WIDTH - 1)
    

  87.     *x = SCREEN_WIDTH - 1;
    

  88.   
    

  89.   k = (float)SCREEN_HEIGHT / (TOUCH_BOTTOM - TOUCH_TOP);
    

  90.   b = -k * TOUCH_TOP;
    

  91.   *y = k * value_y + b;
    

  92.   if (*y < 0)
    

  93.     *y = 0;
    

  94.   else if (*y > SCREEN_HEIGHT - 1)
    

  95.     *y = SCREEN_HEIGHT - 1;
    

  96.   *y = (SCREEN_HEIGHT - 1) - *y;
    

  97. }
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 楼主| 4y1b3 发表于 2023-5-26 22:22 | 显示全部楼层
XPT2046.h：
复制
  1. #ifndef _XPT2046_H
    

  2. #define _XPT2046_H
    

  3.  
    

  4. #define XPT2046_READX 0x90
    

  5. #define XPT2046_READY 0xd0
    

  6.  
    

  7. int XPT2046_GetITStatus(void);
    

  8. void XPT2046_Init(void);
    

  9. uint16_t XPT2046_Read(uint8_t cmd);
    

  10. void XPT2046_ReadPosition(int *x, int *y);
    

  11.  
    

  12. #endif
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 楼主| 4y1b3 发表于 2023-5-26 22:26 | 显示全部楼层
【程序运行结果】
复制
  1. STM32F407VE FSMC ILI9325
    

  2. SystemCoreClock=168000000
    

  3. LCD ID: 0x9325
    

  4. Display error! err/count=101/1240
    

  5. value_x=762, value_y=3218
    

  6. (29,39)
    

  7. value_x=766, value_y=3219
    

  8. (29,39)
    

  9. value_x=751, value_y=3224
    

  10. (28,38)
    

  11. value_x=764, value_y=3222
    

  12. (29,38)
    

  13. value_x=757, value_y=3224
    

  14. (29,38)
    

  15. value_x=760, value_y=3225
    

  16. (29,38)
    

  17. value_x=759, value_y=3225
    

  18. (29,38)
    

  19. value_x=750, value_y=3223
    

  20. (28,38)
    

  21. value_x=756, value_y=3222
    

  22. (29,38)
    

  23. value_x=754, value_y=3221
    

  24. (28,38)
    

  25. value_x=835, value_y=3171
    

  26. (35,44)
    

  27. value_x=1650, value_y=1172
    

  28. (99,256)
    

  29. value_x=1145, value_y=1545
    

  30. (59,216)
    

  31. value_x=1168, value_y=1548
    

  32. (61,216)
    

  33. value_x=1247, value_y=1585
    

  34. (67,212)
    

  35. value_x=1339, value_y=1620
    

  36. (74,208)
    

  37. value_x=1407, value_y=1643
    

  38. (80,206)
    

  39. value_x=1474, value_y=1668
    

  40. (85,203)
    

  41. value_x=1533, value_y=1712
    

  42. (90,199)
    

  43. value_x=1581, value_y=1740
    

  44. (93,196)
    

  45. value_x=1611, value_y=1769
    

  46. (96,193)
    

  47. value_x=1653, value_y=1785
    

  48. (99,191)
    

  49. value_x=1693, value_y=1816
    

  50. (102,188)
    

  51. value_x=1714, value_y=1835
    

  52. (104,186)
    

  53. value_x=1786, value_y=1882
    

  54. (110,181)
    

  55. value_x=1847, value_y=1915
    

  56. (114,177)
    

  57. value_x=1865, value_y=1937
    

  58. (116,175)
    

  59. value_x=1919, value_y=1971
    

  60. (120,171)
    

  61. value_x=1946, value_y=1994
    

  62. (122,169)
    

  63. value_x=1942, value_y=2005
    

  64. (122,168)
    

  65. value_x=1967, value_y=2023
    

  66. (124,166)
    

  67. value_x=2009, value_y=2044
    

  68. (127,163)
    

  69. value_x=2013, value_y=2053
    

  70. (127,162)
    

  71. value_x=2009, value_y=2055
    

  72. (127,162)
    

  73. value_x=1998, value_y=2053
    

  74. (126,162)
    

  75. value_x=2013, value_y=2057
    

  76. (127,162)
    

  77. value_x=2017, value_y=2062
    

  78. (128,161)
    

  79. value_x=2017, value_y=2069
    

  80. (128,161)
    

  81. value_x=2056, value_y=2019
    

  82. (131,166)
    

  83. value_x=2102, value_y=2120
    

  84. (134,155)
    

  85. value_x=2095, value_y=2138
    

  86. (134,153)
    

  87. value_x=2163, value_y=2183
    

  88. (139,149)
    

  89. value_x=2129, value_y=2208
    

  90. (137,146)
    

  91. value_x=2137, value_y=2221
    

  92. (137,145)
    

  93. value_x=2135, value_y=2243
    

  94. (137,142)
    

  95. value_x=2171, value_y=2269
    

  96. (140,139)
    

  97. value_x=2180, value_y=2278
    

  98. (141,139)
    

  99. value_x=2197, value_y=2283
    

  100. (142,138)
    

  101. value_x=2181, value_y=2288
    

  102. (141,137)
    

  103. value_x=2188, value_y=2292
    

  104. (141,137)
    

  105. value_x=2194, value_y=2304
    

  106. (142,136)
    

  107. value_x=2192, value_y=2307
    

  108. (142,135)
    

  109. value_x=2189, value_y=2308
    

  110. (141,135)
    

  111. value_x=2197, value_y=2310
    

  112. (142,135)
    

  113. value_x=2187, value_y=2314
    

  114. (141,135)
    

  115. value_x=2212, value_y=2319
    

  116. (143,134)
    

  117. value_x=2223, value_y=2328
    

  118. (144,133)
    

  119. value_x=2249, value_y=2351
    

  120. (146,131)
    

  121. value_x=2250, value_y=2362
    

  122. (146,130)
    

  123. value_x=2252, value_y=2380
    

  124. (146,128)
    

  125. value_x=2253, value_y=2408
    

  126. (146,125)
    

  127. value_x=2243, value_y=2424
    

  128. (146,123)
    

  129. value_x=2265, value_y=2440
    

  130. (147,121)
    

  131. value_x=2260, value_y=2452
    

  132. (147,120)
    

  133. value_x=2279, value_y=2455
    

  134. (148,120)
    

  135. value_x=2276, value_y=2464
    

  136. (148,119)
    

  137. value_x=2287, value_y=2468
    

  138. (149,118)
    

  139. value_x=2296, value_y=2486
    

  140. (150,116)
    

  141. value_x=2324, value_y=2504
    

  142. (152,114)
    

  143. value_x=2337, value_y=2519
    

  144. (153,113)
    

  145. value_x=2345, value_y=2522
    

  146. (154,113)
    

  147. value_x=2335, value_y=2530
    

  148. (153,112)
    

  149. value_x=2330, value_y=2530
    

  150. (152,112)
    

  151. value_x=2348, value_y=2538
    

  152. (154,111)
    

  153. value_x=2347, value_y=2543
    

  154. (154,110)
    

  155. value_x=2673, value_y=1826
    

  156. (179,187)
    

  157. value_x=2426, value_y=2584
    

  158. (160,106)
    

  159. value_x=2375, value_y=2623
    

  160. (156,102)
    

  161. value_x=2364, value_y=2650
    

  162. (155,99)
    

  163. value_x=2408, value_y=2685
    

  164. (158,95)
    

  165. value_x=2428, value_y=2700
    

  166. (160,94)
    

  167. value_x=2424, value_y=2708
    

  168. (160,93)
    

  169. value_x=2411, value_y=2718
    

  170. (159,92)
    

  171. value_x=2509, value_y=2328
    

  172. (166,133)
    

  173. value_x=2740, value_y=1739
    

  174. (185,196)
    

  175. value_x=3835, value_y=24
    

  176. (239,319)
    

  177. value_x=2498, value_y=2752
    

  178. (166,88)
    

  179. value_x=2452, value_y=2774
    

  180. (162,86)
    

  181. value_x=2449, value_y=2797
    

  182. (162,83)
    

  183. value_x=2441, value_y=2806
    

  184. (161,82)
    

  185. value_x=3617, value_y=378
    

  186. (239,319)
    

  187. value_x=2509, value_y=2848
    

  188. (166,78)
    

  189. value_x=2507, value_y=2850
    

  190. (166,78)
    

  191. value_x=2509, value_y=2840
    

  192. (166,79)
    

  193. value_x=2504, value_y=2852
    

  194. (166,78)
    

  195. value_x=3156, value_y=2087
    

  196. (217,159)
    

  197. value_x=2969, value_y=3197
    

  198. (203,41)
    

  199. value_x=2990, value_y=3204
    

  200. (204,40)
    

  201. value_x=2979, value_y=3205
    

  202. (203,40)
    

  203. value_x=3050, value_y=3251
    

  204. (209,35)
    

  205. value_x=3053, value_y=3252
    

  206. (209,35)
    

  207. value_x=3052, value_y=3254
    

  208. (209,35)
    

  209. value_x=3183, value_y=2535
    

  210. (219,111)
    

  211. value_x=3136, value_y=3315
    

  212. (216,28)
    

  213. value_x=3134, value_y=3327
    

  214. (216,27)
    

  215. value_x=3571, value_y=1424
    

  216. (239,229)
    

  217. value_x=3183, value_y=3371
    

  218. (219,22)
    

  219. value_x=3208, value_y=3376
    

  220. (221,22)
    

  221. value_x=3216, value_y=3381
    

  222. (222,21)
    

  223. value_x=3196, value_y=3387
    

  224. (220,21)
    

  225. value_x=3217, value_y=3388
    

  226. (222,21)
    

  227. value_x=3214, value_y=3392
    

  228. (222,20)
    

  229. value_x=3210, value_y=3395
    

  230. (222,20)
    

  231. value_x=3203, value_y=3399
    

  232. (221,19)
    

  233. value_x=3205, value_y=3402
    

  234. (221,19)
    

  235. value_x=3211, value_y=3417
    

  236. (222,17)
    

  237. value_x=3273, value_y=3444
    

  238. (226,15)
    

  239. value_x=3279, value_y=3463
    

  240. (227,13)
    

  241. value_x=3306, value_y=3489
    

  242. (229,10)
    

  243. value_x=3312, value_y=3521
    

  244. (230,6)
    

  245. value_x=3326, value_y=3529
    

  246. (231,6)
    

  247. value_x=3322, value_y=3534
    

  248. (230,5)
    

  249. value_x=3325, value_y=3533
    

  250. (231,5)
    

  251. value_x=3320, value_y=3539
    

  252. (230,4)
    

  253. value_x=3320, value_y=3544
    

  254. (230,4)
    

  255. value_x=3327, value_y=3554
    

  256. (231,3)
    

  257. value_x=3338, value_y=3579
    

  258. (232,0)
    

  259. value_x=3381, value_y=3608
    

  260. (235,0)
    

  261. value_x=3391, value_y=3613
    

  262. (236,0)
    

  263. value_x=3398, value_y=3617
    

  264. (236,0)
    

  265. value_x=3403, value_y=3621
    

  266. (237,0)
    

  267. value_x=3417, value_y=3631
    

  268. (238,0)
    

  269. value_x=3441, value_y=3651
    

  270. (239,0)
    

  271. value_x=3458, value_y=3669
    

  272. (239,0)
    

  273. value_x=3466, value_y=3675
    

  274. (239,0)
    

  275. value_x=3471, value_y=3683
    

  276. (239,0)
    

  277. value_x=3479, value_y=3686
    

  278. (239,0)
    

  279. value_x=3486, value_y=3690
    

  280. (239,0)
    

  281. value_x=3485, value_y=3690
    

  282. (239,0)
    

  283. value_x=3479, value_y=3694
    

  284. (239,0)
    

  285. value_x=3486, value_y=3696
    

  286. (239,0)
    

  287. value_x=3490, value_y=3700
    

  288. (239,0)
    

  289. value_x=3492, value_y=3710
    

  290. (239,0)
    

  291. value_x=3498, value_y=3714
    

  292. (239,0)
    

  293. value_x=3504, value_y=3349
    

  294. (239,25)
    

  295. value_x=3565, value_y=643
    

  296. (239,312)
    

  297. value_x=3566, value_y=644
    

  298. (239,312)
    

  299. value_x=3703, value_y=386
    

  300. (239,319)
    

  301. value_x=3478, value_y=567
    

  302. (239,319)
    

  303. value_x=3423, value_y=568
    

  304. (238,319)
    

  305. value_x=3391, value_y=577
    

  306. (236,319)
    

  307. value_x=3399, value_y=578
    

  308. (236,319)
    

  309. value_x=3399, value_y=578
    

  310. (236,319)
    

  311. value_x=3395, value_y=579
    

  312. (236,319)
    

  313. value_x=3401, value_y=577
    

  314. (237,319)
    

  315. value_x=3403, value_y=579
    

  316. (237,319)
    

  317. value_x=3394, value_y=575
    

  318. (236,319)
    

  319. value_x=3367, value_y=568
    

  320. (234,319)
    

  321. value_x=3593, value_y=3790
    

  322. (239,0)
    

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  981. value_x=3595, value_y=433
    

  982. (239,319)
    

  983.
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