[STM32L5] STM32L562E-DK开发板的BSP学习

该工程所在位置 STM32Cube_FW_L5_V1.5.0\Projects\STM32L562E-DK\Examples\BSP\MDK-ARM
打开工程，找到main.c的main函数，查看硬件初始化函数

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1. static void SystemHardwareInit(void)
2. {
3. /* Init LEDs */
4. if (LedInitialized != SET)
5. {
6. if (BSP_LED_Init(LED9) != BSP_ERROR_NONE)
7. {
8. Error_Handler();
9. }
10. if (BSP_LED_Init(LED10) != BSP_ERROR_NONE)
11. {
12. Error_Handler();
13. }
14. LedInitialized = SET;
15. }
16. /* Init User push-button in EXTI Mode */
17. if (ButtonInitialized != SET)
18. {
19. if (BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI) != BSP_ERROR_NONE)
20. {
21. Error_Handler();
22. }
23. ButtonInitialized = SET;
24. }
25. /* Initialize the LCD */
26. if (LcdInitialized != SET)
27. {
28. LCD_UTILS_Drv_t lcdDrv;
29. /* Initialize the LCD */
30. if (BSP_LCD_Init(0, LCD_ORIENTATION_PORTRAIT) != BSP_ERROR_NONE)
31. {
32. Error_Handler();
33. }
34. /* Set UTIL_LCD functions */
35. lcdDrv.DrawBitmap = BSP_LCD_DrawBitmap;
36. lcdDrv.FillRGBRect = BSP_LCD_FillRGBRect;
37. lcdDrv.DrawHLine = BSP_LCD_DrawHLine;
38. lcdDrv.DrawVLine = BSP_LCD_DrawVLine;
39. lcdDrv.FillRect = BSP_LCD_FillRect;
40. lcdDrv.GetPixel = BSP_LCD_ReadPixel;
41. lcdDrv.SetPixel = BSP_LCD_WritePixel;
42. lcdDrv.GetXSize = BSP_LCD_GetXSize;
43. lcdDrv.GetYSize = BSP_LCD_GetYSize;
44. lcdDrv.SetLayer = BSP_LCD_SetActiveLayer;
45. lcdDrv.GetFormat = BSP_LCD_GetFormat;
46. UTIL_LCD_SetFuncDriver(&lcdDrv);
47. /* Clear the LCD */
48. UTIL_LCD_Clear(UTIL_LCD_COLOR_WHITE);
49. /* Set the display on */
50. if (BSP_LCD_DisplayOn(0) != BSP_ERROR_NONE)
51. {
52. Error_Handler();
53. }
54. LcdInitialized = SET;
55. }
56. /* Initialize the TouchScreen */
57. if (TsInitialized != SET)
58. {
59. TS_Init_t TsInit;
60. /* Initialize the TouchScreen */
61. TsInit.Width = 240;
62. TsInit.Height = 240;
63. TsInit.Orientation = TS_ORIENTATION_PORTRAIT;
64. TsInit.Accuracy = 10;
65. if (BSP_TS_Init(0, &TsInit) != BSP_ERROR_NONE)
66. {
67. Error_Handler();
68. }
69. /* Configure TS interrupt */
70. if (BSP_TS_EnableIT(0) != BSP_ERROR_NONE)
71. {
72. Error_Handler();
73. }
74. TsInitialized = SET;
75. }
76. }

该函数对LED 、按钮、LCD屏幕、触摸屏进行初始化，并由初始化完成标志位变量进行置位。
LED的初始化函数如下

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1. int32_t BSP_LED_Init(Led_TypeDef Led)
2. {
3. int32_t status = BSP_ERROR_NONE;
4. GPIO_InitTypeDef GPIO_Init;
5. /* Enable the GPIO_LED Clock */
6. if (Led == LED9)
7. {
8. LED9_GPIO_CLK_ENABLE();
9. }
10. else /* Led = LED10 */
11. {
12. /* Enable VddIO2 for GPIOG */
13. __HAL_RCC_PWR_CLK_ENABLE();
14. HAL_PWREx_EnableVddIO2();
15. LED10_GPIO_CLK_ENABLE();
16. }
17. /* configure the GPIO_LED pin */
18. GPIO_Init.Pin = LED_PIN[Led];
19. GPIO_Init.Mode = GPIO_MODE_OUTPUT_PP;
20. GPIO_Init.Pull = GPIO_PULLUP;
21. GPIO_Init.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
22. HAL_GPIO_Init(LED_PORT[Led], &GPIO_Init);
23. HAL_GPIO_WritePin(LED_PORT[Led], LED_PIN[Led], GPIO_PIN_SET);
24. return status;
25. }

该函数对IO所在的时钟进行了启用，并对IO进行配置，配置为输出高电平。
按钮的配置，如下

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1. int32_t BSP_PB_Init(Button_TypeDef Button, ButtonMode_TypeDef ButtonMode)
2. {
3. int32_t status = BSP_ERROR_NONE;
4. GPIO_InitTypeDef GPIO_Init;
5. uint32_t BSP_BUTTON_IT_PRIO[BUTTONn] = {BSP_BUTTON_USER_IT_PRIORITY};
6. uint32_t BUTTON_EXTI_LINE[BUTTONn] = {BUTTON_USER_EXTI_LINE};
7. BSP_EXTI_LineCallback ButtonCallback[BUTTONn] = {BUTTON_USER_EXTI_Callback};
8. /* Enable the BUTTON clock */
9. BUTTON_USER_GPIO_CLK_ENABLE();
10. GPIO_Init.Pin = BUTTON_PIN[Button];
11. GPIO_Init.Pull = GPIO_NOPULL;
12. GPIO_Init.Speed = GPIO_SPEED_FREQ_HIGH;
13. if (ButtonMode == BUTTON_MODE_GPIO)
14. {
15. /* Configure Button pin as input */
16. GPIO_Init.Mode = GPIO_MODE_INPUT;
17. HAL_GPIO_Init(BUTTON_PORT[Button], &GPIO_Init);
18. }
19. if (ButtonMode == BUTTON_MODE_EXTI)
20. {
21. /* Configure Button pin as input with External interrupt */
22. GPIO_Init.Mode = GPIO_MODE_IT_RISING;
23. HAL_GPIO_Init(BUTTON_PORT[Button], &GPIO_Init);
24. if (HAL_EXTI_GetHandle(&hpb_exti[Button], BUTTON_EXTI_LINE[Button]) == HAL_OK)
25. {
26. if (HAL_EXTI_RegisterCallback(&hpb_exti[Button], HAL_EXTI_RISING_CB_ID, ButtonCallback[Button]) == HAL_OK)
27. {
28. /* Enable and set Button EXTI Interrupt to the lowest priority */
29. HAL_NVIC_SetPriority(BUTTON_IRQn[Button], BSP_BUTTON_IT_PRIO[Button], 0x00);
30. HAL_NVIC_EnableIRQ(BUTTON_IRQn[Button]);
31. }
32. else
33. {
34. status = BSP_ERROR_PERIPH_FAILURE;
35. }
36. }
37. else
38. {
39. status = BSP_ERROR_PERIPH_FAILURE;
40. }
41. }
42. return status;
43. }

可配置为IO模式和中断模式

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1. <div>static void BUTTON_USER_EXTI_Callback(void)</div><div>{</div><div> BSP_PB_Callback(BUTTON_USER);</div><div>}</div><div>
2. </div><div><div>__weak void BSP_PB_Callback(Button_TypeDef Button)</div><div>{</div><div> /* Prevent unused argument(s) compilation warning */</div><div> UNUSED(Button);</div><div>
3. </div><div> /* This function should be implemented by the user application.</div><div> It is called into this driver when an event on Button is triggered. */</div><div>}</div></div>

层层嵌套，不知道这么做目的是不是为了可移植性。

LCD的硬件接口初始化采用如下函数

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1. int32_t BSP_LCD_Init(uint32_t Instance, uint32_t Orientation)
2. {
3. int32_t status = BSP_ERROR_NONE;
4. if ((Instance >= LCD_INSTANCES_NBR) || (Orientation > LCD_ORIENTATION_LANDSCAPE_ROT180))
5. {
6. status = BSP_ERROR_WRONG_PARAM;
7. }
8. else
9. {
10. /* Power up LCD */
11. ST7789H2_PowerUp();
12. /* Probe the LCD driver */
13. if (ST7789H2_Probe(Orientation) != BSP_ERROR_NONE)
14. {
15. status = BSP_ERROR_COMPONENT_FAILURE;
16. }
17. }
18. return status;
19. }

根据函数定义到定义引脚的宏，知道了供电控制引脚、复位引脚、背光引脚，

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1. #define LCD_POWER_GPIO_PORT GPIOH
2. #define LCD_POWER_GPIO_PIN GPIO_PIN_0
3. #define LCD_POWER_GPIO_CLOCK_ENABLE() __HAL_RCC_GPIOH_CLK_ENABLE()
4. #define LCD_RESET_GPIO_PORT GPIOF
5. #define LCD_RESET_GPIO_PIN GPIO_PIN_14
6. #define LCD_RESET_GPIO_CLOCK_ENABLE() __HAL_RCC_GPIOF_CLK_ENABLE()
7. #define LCD_BACKLIGHT_GPIO_PORT GPIOE
8. #define LCD_BACKLIGHT_GPIO_PIN GPIO_PIN_1
9. #define LCD_BACKLIGHT_GPIO_CLOCK_ENABLE() __HAL_RCC_GPIOE_CLK_ENABLE()

上电函数就是对LCD供电、复位、以及打开背光

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1. static void ST7789H2_PowerUp(void)
2. {
3. GPIO_InitTypeDef GPIO_InitStruct;
4. /* Initialize and configure the ST7789H2 power pin */
5. LCD_POWER_GPIO_CLOCK_ENABLE();
6. GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
7. GPIO_InitStruct.Pull = GPIO_NOPULL;
8. GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
9. GPIO_InitStruct.Pin = LCD_POWER_GPIO_PIN;
10. HAL_GPIO_Init(LCD_POWER_GPIO_PORT, &GPIO_InitStruct);
11. /* Power on the ST7789H2 */
12. HAL_GPIO_WritePin(LCD_POWER_GPIO_PORT, LCD_POWER_GPIO_PIN, GPIO_PIN_RESET);
13. /* Initialize and configure the ST7789H2 reset pin */
14. LCD_RESET_GPIO_CLOCK_ENABLE();
15. GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
16. GPIO_InitStruct.Pull = GPIO_NOPULL;
17. GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
18. GPIO_InitStruct.Pin = LCD_RESET_GPIO_PIN;
19. HAL_GPIO_Init(LCD_RESET_GPIO_PORT, &GPIO_InitStruct);
20. /* Reset the ST7789H2 */
21. HAL_GPIO_WritePin(LCD_RESET_GPIO_PORT, LCD_RESET_GPIO_PIN, GPIO_PIN_RESET);
22. HAL_Delay(1); /* wait at least 10us according ST7789H2 datasheet */
23. HAL_GPIO_WritePin(LCD_RESET_GPIO_PORT, LCD_RESET_GPIO_PIN, GPIO_PIN_SET);
24. HAL_Delay(120); /* wait maximum 120ms according ST7789H2 datasheet */
25. /* Initialize GPIO for backlight control and enable backlight */
26. LCD_BACKLIGHT_GPIO_CLOCK_ENABLE();
27. GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
28. GPIO_InitStruct.Pull = GPIO_NOPULL;
29. GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
30. GPIO_InitStruct.Pin = LCD_BACKLIGHT_GPIO_PIN;
31. HAL_GPIO_Init(LCD_BACKLIGHT_GPIO_PORT, &GPIO_InitStruct);
32. HAL_GPIO_WritePin(LCD_BACKLIGHT_GPIO_PORT, LCD_BACKLIGHT_GPIO_PIN, GPIO_PIN_SET);
33. }

该LCD采用了并口发送数据

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1. /** @defgroup STM32L562E-DK_LCD_Private_Functions STM32L562E-DK LCD Private Functions
2. * @{
3. */
4. /**
5. * [url=home.php?mod=space&uid=247401]@brief[/url] Probe the ST7789H2 LCD driver.
6. * @param Orientation LCD_ORIENTATION_PORTRAIT, LCD_ORIENTATION_LANDSCAPE,
7. * LCD_ORIENTATION_PORTRAIT_ROT180 or LCD_ORIENTATION_LANDSCAPE_ROT180.
8. * @retval BSP status.
9. */
10. static int32_t ST7789H2_Probe(uint32_t Orientation)
11. {
12. int32_t status;
13. ST7789H2_IO_t IOCtx;
14. uint32_t st7789h2_id;
15. static ST7789H2_Object_t ST7789H2Obj;
16. uint32_t lcd_orientation;
17. /* Configure the LCD driver */
18. IOCtx.Address = LCD_FMC_ADDRESS;
19. IOCtx.Init = LCD_FMC_Init;
20. IOCtx.DeInit = LCD_FMC_DeInit;
21. IOCtx.ReadReg = LCD_FMC_ReadReg16;
22. IOCtx.WriteReg = LCD_FMC_WriteReg16;
23. IOCtx.SendData = LCD_FMC_Send;
24. IOCtx.GetTick = LCD_FMC_GetTick;
25. if (ST7789H2_RegisterBusIO(&ST7789H2Obj, &IOCtx) != ST7789H2_OK)
26. {
27. status = BSP_ERROR_BUS_FAILURE;
28. }
29. else if (ST7789H2_ReadID(&ST7789H2Obj, &st7789h2_id) != ST7789H2_OK)
30. {
31. status = BSP_ERROR_COMPONENT_FAILURE;
32. }
33. else if (st7789h2_id != ST7789H2_ID)
34. {
35. status = BSP_ERROR_UNKNOWN_COMPONENT;
36. }
37. else
38. {
39. Lcd_CompObj[0] = &ST7789H2Obj;
40. Lcd_Drv[0] = (LCD_Drv_t *) &ST7789H2_Driver;
41. if (Orientation == LCD_ORIENTATION_PORTRAIT)
42. {
43. lcd_orientation = ST7789H2_ORIENTATION_PORTRAIT;
44. }
45. else if (Orientation == LCD_ORIENTATION_LANDSCAPE)
46. {
47. lcd_orientation = ST7789H2_ORIENTATION_LANDSCAPE;
48. }
49. else if (Orientation == LCD_ORIENTATION_PORTRAIT_ROT180)
50. {
51. lcd_orientation = ST7789H2_ORIENTATION_PORTRAIT_ROT180;
52. }
53. else
54. {
55. lcd_orientation = ST7789H2_ORIENTATION_LANDSCAPE_ROT180;
56. }
57. if (Lcd_Drv[0]->Init(Lcd_CompObj[0], ST7789H2_FORMAT_RBG565, lcd_orientation) < 0)
58. {
59. status = BSP_ERROR_COMPONENT_FAILURE;
60. }
61. else
62. {
63. status = BSP_ERROR_NONE;
64. }
65. }
66. return status;
67. }

采用FMC地址给屏幕发送数据

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1. #define LCD_REGISTER_ADDR FMC_BANK1_1
2. #define LCD_DATA_ADDR (FMC_BANK1_1 | 0x00000002UL)
3. #define LCD_FMC_ADDRESS 1U

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1. static void Display_DemoDescription(void)
2. {
3. char desc[60];
4. /* Set font */
5. UTIL_LCD_SetFont(&Font20);
6. /* Clear the LCD */
7. UTIL_LCD_Clear(UTIL_LCD_COLOR_WHITE);
8. /* Set the LCD Text Color */
9. UTIL_LCD_SetTextColor(UTIL_LCD_COLOR_DARKBLUE);
10. UTIL_LCD_SetBackColor(UTIL_LCD_COLOR_WHITE);
11. /* Display LCD messages */
12. UTIL_LCD_DisplayStringAt(0, 10, (uint8_t *)"STM32L562E-DK BSP", CENTER_MODE);
13. UTIL_LCD_DisplayStringAt(0, 35, (uint8_t *)"drivers example", CENTER_MODE);
14. /* Draw Bitmap */
15. UTIL_LCD_DrawBitmap(80, 65, (uint8_t *)st**);
16. UTIL_LCD_SetFont(&Font8);
17. UTIL_LCD_DisplayStringAt(0, 220, (uint8_t *)"Copyright (c) STMicroelectronics 2019", CENTER_MODE);
18. UTIL_LCD_SetFont(&Font12);
19. UTIL_LCD_FillRect(0, 145, 240, 50, UTIL_LCD_COLOR_BLUE);
20. UTIL_LCD_SetTextColor(UTIL_LCD_COLOR_WHITE);
21. UTIL_LCD_SetBackColor(UTIL_LCD_COLOR_BLUE);
22. UTIL_LCD_DisplayStringAt(0, 150, (uint8_t *)"Press User push-button", CENTER_MODE);
23. UTIL_LCD_DisplayStringAt(0, 165, (uint8_t *)"to start :", CENTER_MODE);
24. sprintf(desc,"%s example", BSP_examples[DemoIndex].DemoName);
25. UTIL_LCD_DisplayStringAt(0, 180, (uint8_t *)desc, CENTER_MODE);
26. }

编译工程烧录

效果不错，这个工程里出现了函数指针结构体，比较难的一个知识点。

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1. typedef int32_t (*ST7789H2_Write_Func)(void *, uint16_t, uint8_t *, uint32_t);
2. typedef int32_t (*ST7789H2_Read_Func)(void *, uint16_t, uint8_t *, uint32_t);
3. typedef int32_t (*ST7789H2_Send_Func)(void *, uint8_t *, uint32_t);
4. typedef struct
5. {
6. ST7789H2_Write_Func WriteReg;
7. ST7789H2_Read_Func ReadReg;
8. ST7789H2_Send_Func SendData;
9. void *handle;
10. } ST7789H2_ctx_t;

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作者：gaoyang9992006
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