《2023DigiKey汽车应用创意挑战赛》---驱动OLED显示屏

suncat0504

作为显示部件，本来是打算使用I2C接口的OLED，[size=12.0000pt]和板载的传感器使用相同的接口。它们基本上都是用PH4作为SCL，PH5作为SDA，使用I2C接口协议。为此查看PH4和PH5是否对外开放了插头座之类的接口。可以看到在CN2中已经开放了，在第7脚和第10脚刚好就是对应PH4和PH5。

CN2和CN3都是2*10的2.0mm输出插座。为了方便连接OLED，买了转接板，将2.0mm转为2.54mm间距，方便用杜邦线连接。

为此简单修改下GPIO_TOGGLE程序，测试PH4和PH5的输出。



[size=12.0000pt]在原来的程序基础上，
[size=12.0000pt]1、在main.h中加入以下代码：
[size=10.0000pt]#define I2C_GPIO_PORT                   GPIOH
[size=10.0000pt]#define I2C_GPIO_CLK_ENABLE()           __HAL_RCC_GPIOH_CLK_ENABLE()
[size=10.0000pt]#define I2C_SCK_GPIO_CLK_DISABLE()          __HAL_RCC_GPIOH_CLK_DISABLE()
[size=10.0000pt]#define I2C_SCL_PIN                         GPIO_PIN_4
[size=10.0000pt]#define I2C_SDA_PIN                         GPIO_PIN_5
[size=12.0000pt]2、在主程序main中加入以下代码：
        [size=10.0000pt]// 允许使用PH4和PH5作为I2C的SCL和SDA。因为同样使用PH口，所以不再设置Mode，Pull，Speed
        GPIO_InitStruct.[size=10.0000pt]Pin = I2C_SCL_PIN | I2C_SDA_PIN;
        [size=10.0000pt]HAL_GPIO_Init(I2C_GPIO_PORT, &GPIO_InitStruct);
[size=12.0000pt]运行能看到PH4和PH5的正常输出。至此完成 GPIO口的的设置。下面是加入OLED驱动的相关代码。是以软件模拟方式操作的（虽然PH4和PH5是可以复用为I2C2的SCL和SDA，但是用I2C外设方式操作I2C从设备，实在是很麻烦）。由于OLED的电压是3.3V，而CN2和CN3并没有这个电压的输出，幸好这个我开发板的反面提供了Arduino的输出支持，其中有3.3V可用。
以下是main.c的代码，其它代码就不粘贴了，后面附上整个工程的压缩包。

1. /* USER CODE BEGIN Header */
   
2. /**
   
3. ******************************************************************************
   
4. * @file    GPIO/GPIO_IOToggle/Src/main.c
   
5. * @author  MCD Application Team
   
6. * @brief   This example describes how to configure and use GPIOs through
   
7. *          the STM32U5xx HAL API.
   
8. ******************************************************************************
   
9. * @attention
   
10. *
    
11. * Copyright (c) 2021 STMicroelectronics.
    
12. * All rights reserved.
    
13. *
    
14. * This software is licensed under terms that can be found in the LICENSE file
    
15. * in the root directory of this software component.
    
16. * If no LICENSE file comes with this software, it is provided AS-IS.
    
17. *
    
18. ******************************************************************************
    
19. */
    
20. /* USER CODE END Header */
    
21. /* Includes ------------------------------------------------------------------*/
    
22. #include "main.h"
    
23. 
    
24. /* Private includes ----------------------------------------------------------*/
    
25. /* USER CODE BEGIN Includes */
    
26. #include "gui.h"
    
27. #include "bmp.h"
    
28. /* USER CODE END Includes */
    
29. 
    
30. /* Private typedef -----------------------------------------------------------*/
    
31. /* USER CODE BEGIN PTD */
    
32. 
    
33. /* USER CODE END PTD */
    
34. 
    
35. /* Private define ------------------------------------------------------------*/
    
36. /* USER CODE BEGIN PD */
    
37. 
    
38. /* USER CODE END PD */
    
39. 
    
40. /* Private macro -------------------------------------------------------------*/
    
41. /* USER CODE BEGIN PM */
    
42. 
    
43. /* USER CODE END PM */
    
44. 
    
45. /* Private variables ---------------------------------------------------------*/
    
46. 
    
47. /* USER CODE BEGIN PV */
    
48. static GPIO_InitTypeDef GPIO_InitStruct;
    
49. 
    
50. /* USER CODE END PV */
    
51. 
    
52. /* Private function prototypes -----------------------------------------------*/
    
53. void SystemClock_Config(void);
    
54. static void SystemPower_Config(void);
    
55. static void MX_ICACHE_Init(void);
    
56. /* USER CODE BEGIN PFP */
    
57. 
    
58. /* USER CODE END PFP */
    
59. 
    
60. /* Private user code ---------------------------------------------------------*/
    
61. /* USER CODE BEGIN 0 */
    
62. void TEST_Para(void) {
    
63.         uint8_t i;
    
64.         srand(123456789);
    
65.         GUI_ShowString(0,0, (unsigned char *)"Para1:",8,1);
    
66.         GUI_ShowString(64,0,(unsigned char *)"8888",8,1);
    
67. 
    
68.         GUI_ShowString(0,8,(unsigned char *)"Para2:",8,1);
    
69.         GUI_ShowString(64,8,(unsigned char *)"888",8,1);
    
70. 
    
71.         GUI_ShowString(0,16,(unsigned char *)"Para3:",8,1);
    
72.         GUI_ShowString(64,16,(unsigned char *)"888",8,1);
    
73. 
    
74.         GUI_ShowString(0,24,(unsigned char *)"Para4:",8,1);
    
75.         GUI_ShowString(64,24,(unsigned char *)"888",8,1);
    
76. 
    
77.         for(i=0;i<15;i++) {
    
78.                 GUI_ShowNum(64,0,rand()%10+1,1,8,1);
    
79.                 GUI_ShowNum(72,0,rand()%10,1,8,1);
    
80.                 GUI_ShowNum(80,0,rand()%10,1,8,1);
    
81.                 GUI_ShowNum(88,0,rand()%10,1,8,1);
    
82. 
    
83.                 GUI_ShowNum(64,8,rand()%10+1,1,8,1);
    
84.                 GUI_ShowNum(72,8,rand()%10,1,8,1);
    
85.                 GUI_ShowNum(80,8,rand()%10,1,8,1);
    
86. 
    
87.                 GUI_ShowNum(64,16,rand()%10+1,1,8,1);
    
88.                 GUI_ShowNum(72,16,rand()%10,1,8,1);
    
89.                 GUI_ShowNum(80,16,rand()%10,1,8,1);
    
90. 
    
91.                 GUI_ShowNum(64,24,rand()%10+1,1,8,1);
    
92.                 GUI_ShowNum(72,24,rand()%10,1,8,1);
    
93.                 GUI_ShowNum(80,24,rand()%10,1,8,1);
    
94. 
    
95.                 HAL_Delay(500);
    
96.         }
    
97. }
    
98. /* USER CODE END 0 */
    
99. 
    
100. 
     
101. /**
     
102. * @brief  The application entry point.
     
103. * @retval int
     
104. */
     
105. int main(void) {
     
106.         /* USER CODE BEGIN 1 */
     
107.         /* STM32U5xx HAL library initialization:
     
108.          - Configure the Flash prefetch
     
109.          - Configure the Systick to generate an interrupt each 1 msec
     
110.          - Set NVIC Group Priority to 3
     
111.          - Low Level Initialization
     
112.          */
     
113.         /* USER CODE END 1 */
     
114. 
     
115.         /* MCU Configuration--------------------------------------------------------*/
     
116. 
     
117.         /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
     
118.         HAL_Init();
     
119. 
     
120.         /* USER CODE BEGIN Init */
     
121. 
     
122.         /* USER CODE END Init */
     
123. 
     
124.         /* Configure the system clock */
     
125.         SystemClock_Config();
     
126. 
     
127.         /* Configure the System Power */
     
128.         SystemPower_Config();
     
129. 
     
130.         /* USER CODE BEGIN SysInit */
     
131. 
     
132.         /* USER CODE END SysInit */
     
133. 
     
134.         /* Initialize all configured peripherals */
     
135.         MX_ICACHE_Init();
     
136.         /* USER CODE BEGIN 2 */
     
137. 
     
138.         /* -1- Enable GPIO Clock (to be able to program the configuration registers) */
     
139.         LED7_GPIO_CLK_ENABLE();
     
140.         LED6_GPIO_CLK_ENABLE();
     
141. 
     
142.         /* -2- Configure IO in output push-pull mode to drive external LEDs */
     
143.         GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
     
144.         GPIO_InitStruct.Pull = GPIO_NOPULL;
     
145.         GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
     
146. 
     
147.         GPIO_InitStruct.Pin = LED7_PIN;
     
148.         HAL_GPIO_Init(LED7_GPIO_PORT, &GPIO_InitStruct);
     
149.         GPIO_InitStruct.Pin = LED6_PIN;
     
150.         HAL_GPIO_Init(LED6_GPIO_PORT, &GPIO_InitStruct);
     
151. 
     
152.         GPIO_InitStruct.Pin = I2C_SCL_PIN | I2C_SDA_PIN;
     
153.         HAL_GPIO_Init(I2C_GPIO_PORT, &GPIO_InitStruct);
     
154. 
     
155.         OLED_Init();                //初始化OLED
     
156.         OLED_Clear(0);      //清屏（全黑）
     
157. 
     
158.         TEST_Menu();
     
159.         /* USER CODE END 2 */
     
160. 
     
161.         /* Infinite loop */
     
162.         /* USER CODE BEGIN WHILE */
     
163.         while (1) {
     
164.                 /* USER CODE END WHILE */
     
165. 
     
166.                 /* USER CODE BEGIN 3 */
     
167.                 //HAL_GPIO_TogglePin(LED7_GPIO_PORT, LED7_PIN);
     
168.                 HAL_GPIO_WritePin(LED7_GPIO_PORT, LED7_PIN, GPIO_PIN_SET);
     
169.                 HAL_GPIO_WritePin(LED7_GPIO_PORT, LED6_PIN, GPIO_PIN_RESET);
     
170. 
     
171. 
     
172. 
     
173.                 HAL_Delay(500);
     
174.                 //HAL_GPIO_TogglePin(LED6_GPIO_PORT, LED6_PIN);
     
175.                 HAL_GPIO_WritePin(LED7_GPIO_PORT, LED6_PIN, GPIO_PIN_SET);
     
176.                 HAL_GPIO_WritePin(LED7_GPIO_PORT, LED7_PIN, GPIO_PIN_RESET);
     
177. 
     
178. 
     
179. 
     
180.                 /* Insert delay 100 ms */
     
181.                 HAL_Delay(500);
     
182. 
     
183.                 TEST_Para();
     
184.                 /* USER CODE END 3 */
     
185. 
     
186.         }
     
187. }
     
188. 
     
189. /**
     
190. * @brief System Clock Configuration
     
191. * @retval None
     
192. */
     
193. void SystemClock_Config(void) {
     
194.         RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
     
195.         RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };
     
196. 
     
197.         /** Configure the main internal regulator output voltage
     
198.          */
     
199.         if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1)
     
200.                         != HAL_OK) {
     
201.                 Error_Handler();
     
202.         }
     
203. 
     
204.         /** Initializes the CPU, AHB and APB buses clocks
     
205.          */
     
206.         RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
     
207.         RCC_OscInitStruct.MSIState = RCC_MSI_ON;
     
208.         RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
     
209.         RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_4;
     
210.         RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
     
211.         RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
     
212.         RCC_OscInitStruct.PLL.PLLMBOOST = RCC_PLLMBOOST_DIV1;
     
213.         RCC_OscInitStruct.PLL.PLLM = 1;
     
214.         RCC_OscInitStruct.PLL.PLLN = 80;
     
215.         RCC_OscInitStruct.PLL.PLLP = 2;
     
216.         RCC_OscInitStruct.PLL.PLLQ = 2;
     
217.         RCC_OscInitStruct.PLL.PLLR = 2;
     
218.         RCC_OscInitStruct.PLL.PLLRGE = RCC_PLLVCIRANGE_0;
     
219.         RCC_OscInitStruct.PLL.PLLFRACN = 0;
     
220.         if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
     
221.                 Error_Handler();
     
222.         }
     
223. 
     
224.         /** Initializes the CPU, AHB and APB buses clocks
     
225.          */
     
226.         RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
     
227.                         | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2 | RCC_CLOCKTYPE_PCLK3;
     
228.         RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     
229.         RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
     
230.         RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
     
231.         RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
     
232.         RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;
     
233. 
     
234.         if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) {
     
235.                 Error_Handler();
     
236.         }
     
237. }
     
238. 
     
239. /**
     
240. * @brief Power Configuration
     
241. * @retval None
     
242. */
     
243. static void SystemPower_Config(void) {
     
244. 
     
245.         /*
     
246.          * Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral
     
247.          */
     
248.         HAL_PWREx_DisableUCPDDeadBattery();
     
249. 
     
250.         /*
     
251.          * Switch to SMPS regulator instead of LDO
     
252.          */
     
253.         if (HAL_PWREx_ConfigSupply(PWR_SMPS_SUPPLY) != HAL_OK) {
     
254.                 Error_Handler();
     
255.         }
     
256.         /* USER CODE BEGIN PWR */
     
257.         /* USER CODE END PWR */
     
258. }
     
259. 
     
260. /**
     
261. * @brief ICACHE Initialization Function
     
262. * @param None
     
263. * @retval None
     
264. */
     
265. static void MX_ICACHE_Init(void) {
     
266. 
     
267.         /* USER CODE BEGIN ICACHE_Init 0 */
     
268. 
     
269.         /* USER CODE END ICACHE_Init 0 */
     
270. 
     
271.         /* USER CODE BEGIN ICACHE_Init 1 */
     
272. 
     
273.         /* USER CODE END ICACHE_Init 1 */
     
274. 
     
275.         /** Enable instruction cache in 1-way (direct mapped cache)
     
276.          */
     
277.         if (HAL_ICACHE_ConfigAssociativityMode(ICACHE_1WAY) != HAL_OK) {
     
278.                 Error_Handler();
     
279.         }
     
280.         if (HAL_ICACHE_Enable() != HAL_OK) {
     
281.                 Error_Handler();
     
282.         }
     
283.         /* USER CODE BEGIN ICACHE_Init 2 */
     
284. 
     
285.         /* USER CODE END ICACHE_Init 2 */
     
286. 
     
287. }
     
288. 
     
289. /* USER CODE BEGIN 4 */
     
290. // 初始化GPIO口用于板载传感器的接口，PH4（SCK），PH5（SDA）
     
291. void Gpio_Init_I2c_ForSensor(void) {
     
292. 
     
293. }
     
294. 
     
295. /**
     
296. * 读取I2C设备的数据
     
297. */
     
298. uint32_t Read_i2c_sensor(uint8_t devAddr, uint8_t cmd, uint8_t dat) {
     
299. 
     
300. 
     
301. }
     
302. 
     
303. /* USER CODE END 4 */
     
304. 
     
305. /**
     
306. * @brief  This function is executed in case of error occurrence.
     
307. * @retval None
     
308. */
     
309. void Error_Handler(void) {
     
310.         /* USER CODE BEGIN Error_Handler_Debug */
     
311.         /* User can add his own implementation to report the HAL error return state */
     
312.         while (1) {
     
313.         }
     
314.         /* USER CODE END Error_Handler_Debug */
     
315. }
     
316. 
     
317. #ifdef  USE_FULL_ASSERT
     
318. /**
     
319.   * @brief  Reports the name of the source file and the source line number
     
320.   *         where the assert_param error has occurred.
     
321.   * @param  file: pointer to the source file name
     
322.   * @param  line: assert_param error line source number
     
323.   * @retval None
     
324.   */
     
325. void assert_failed(uint8_t *file, uint32_t line)
     
326. {
     
327.   /* USER CODE BEGIN 6 */
     
328.   /* User can add his own implementation to report the file name and line number,
     
329.     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
     
330.   /* Infinite loop */
     
331.   while (1)
     
332.   {
     
333.   }
     
334. 
     
335.   /* USER CODE END 6 */
     
336. }
     
337. #endif /* USE_FULL_ASSERT */
     

复制代码

终于调试通了OLED的显示，接下来是对板载的一些传感器的数据读取。

工程包： GPIO_IOToggle.zip (14.04 MB, 下载次数: 0)

2023-12-3 22:19 上传

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注：工程使用CubeIDE开发
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