今天搞了一下MAX7219。
MAX7219原理图,我自己做的模块:
代码:
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#define DIN_PIN GPIO_PIN_10
#define DIN_GPIO_PORT GPIOC
#define DIN_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE()
#define DIN_GPIO_CLK_DISABLE() __HAL_RCC_GPIOC_CLK_DISABLE()
#define LOAD_PIN GPIO_PIN_12
#define LOAD_GPIO_PORT GPIOC
#define LOAD_GPIO_CLK_ENABLE() __HAL_RCC_GPIOC_CLK_ENABLE()
#define LOAD_GPIO_CLK_DISABLE() __HAL_RCC_GPIOC_CLK_DISABLE()
#define CLK_PIN GPIO_PIN_3
#define CLK_GPIO_PORT GPIOH
#define CLK_GPIO_CLK_ENABLE() __HAL_RCC_GPIOH_CLK_ENABLE()
#define CLK_GPIO_CLK_DISABLE() __HAL_RCC_GPIOH_CLK_DISABLE()
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
static GPIO_InitTypeDef GPIO_InitStruct;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void SystemPower_Config(void);
static void MX_ICACHE_Init(void);
/* USER CODE BEGIN PFP */
#define CLK_0 HAL_GPIO_WritePin(CLK_GPIO_PORT,GPIO_PIN_3,GPIO_PIN_RESET)
#define CLK_1 HAL_GPIO_WritePin(CLK_GPIO_PORT,GPIO_PIN_3,GPIO_PIN_SET)
#define LOAD_0 HAL_GPIO_WritePin(LOAD_GPIO_PORT,GPIO_PIN_12,GPIO_PIN_RESET)
#define LOAD_1 HAL_GPIO_WritePin(LOAD_GPIO_PORT,GPIO_PIN_12,GPIO_PIN_SET)
#define DIN_0 HAL_GPIO_WritePin(DIN_GPIO_PORT,GPIO_PIN_10,GPIO_PIN_RESET)
#define DIN_1 HAL_GPIO_WritePin(DIN_GPIO_PORT,GPIO_PIN_10,GPIO_PIN_SET)
#define NoOp 0x00 //??2ù×÷??'??÷
#define Digit0 0x01 // êy??1ü1??'??÷
#define Digit1 0x02 // êy??1ü2??'??÷
#define Digit2 0x03 // êy??1ü3??'??÷
#define Digit3 0x04 // êy??1ü4??'??÷
#define Digit4 0x05 // êy??1ü5??'??÷
#define Digit5 0x06 // êy??1ü6??'??÷
#define Digit6 0x07 // êy??1ü7??'??÷
#define Digit7 0x08 // êy??1ü8??'??÷
#define DecodeMode 0x09 // ò?????ê???'??÷
#define Intensity 0x0a // áá?è??'??÷
#define ScanLimit 0x0b // é¨?è??êy??'??÷
#define ShutDown 0x0c // µí1|o???ê???'??÷
#define DisplayTest 0x0f // ??ê?2aê???'??÷
#define ShutdownMode 0x00 // µí1|o?·?ê?
#define NormalOperation 0x01 // ?y3?2ù×÷·?ê?
#define ScanDigit 0x07 // é¨?è??êyéè??????ê?8??êy??1ü
#define DecodeDigit 0xff // ò???éè????8???ù?aBCD??
#define IntensityGrade 0x0a // áá?è??±eéè??
#define TestMode 0x01 // ??ê?2aê???ê?
#define TextEnd 0x00 // ??ê?2aê??áê??????'?y3?1¤×÷??ê?
/*****************************************************************************
* Function implementation - global ('extern') and local ('static')
******************************************************************************/
uint8_t DisBuffer[8]={0,0,0,0,0,0,0,0}; // ??ê??o'???
//******************?óê±toá??**************************************
void delay(uint16_t t)
{
uint16_t i;
while(t--)
{
/* ??óú12Mê±?ó?????óê±1ms */
for (i=0;i<36;i++)
{}
}
}
//*************?òMAX7219D'è?×??ú?¨8????********************
void SendChar (uint8_t ch)
{
uint8_t i,temp;
delay(1);
for (i=0;i<8;i++)
{
temp=ch&0x80;
ch=ch<<1;
if(temp)
{
DIN_1;
delay(1);
CLK_0;
delay(1);
CLK_1;
delay(1);
}
else
{
DIN_0;
delay(1);
CLK_0;
delay(1);
CLK_1;
delay(1);
}
}
}
//**************?òMAX7219D'è?×??¨16????*****************************
void WriteWord (uint8_t addr,uint8_t num)
{
LOAD_0;
delay(1);
SendChar(addr);
delay(1);
SendChar(num);
delay(1);
LOAD_1; // ??'????àó|??'??÷
}
//*********************** MAX72193?ê??¯ ******************
void InitDisplay (void)
{
WriteWord (ScanLimit,ScanDigit); // éè??é¨?è???T
WriteWord (DecodeMode,DecodeDigit); // éè??ò?????ê?
WriteWord (Intensity,IntensityGrade); // éè??áá?è
WriteWord (ShutDown,NormalOperation); // éè???a?y3?1¤×÷??ê?
}
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* [url=home.php?mod=space&uid=247401]@brief[/url] The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* STM32U5xx HAL library initialization:
- Configure the Flash prefetch
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 3
- Low Level Initialization
*/
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* Configure the System Power */
SystemPower_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_ICACHE_Init();
/* USER CODE BEGIN 2 */
/* -1- Enable GPIO Clock (to be able to program the configuration registers) */
LED1_GPIO_CLK_ENABLE();
LED2_GPIO_CLK_ENABLE();
DIN_GPIO_CLK_ENABLE();
LOAD_GPIO_CLK_ENABLE();
CLK_GPIO_CLK_ENABLE();
/* -2- Configure IO in output push-pull mode to drive external LEDs */
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Pin = LED1_PIN;
HAL_GPIO_Init(LED1_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = LED2_PIN;
HAL_GPIO_Init(LED2_GPIO_PORT, &GPIO_InitStruct);
/* USER CODE END 2 */
GPIO_InitStruct.Pin = CLK_PIN;
HAL_GPIO_Init(CLK_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = LOAD_PIN;
HAL_GPIO_Init(LOAD_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = DIN_PIN;
HAL_GPIO_Init(DIN_GPIO_PORT, &GPIO_InitStruct);
/* Infinite loop */
InitDisplay (); // MAX7219???
WriteWord(DisplayTest,TestMode); // ??????,????LED
delay(1500); // ???1.5s
WriteWord (DisplayTest,TextEnd); // ????????
WriteWord (Digit0,0);
WriteWord (Digit1,1);
WriteWord (Digit2,2);
WriteWord (Digit3,3);
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
/* Insert delay 100 ms */
InitDisplay (); // MAX7219???
delay(150); // ???1.5s
WriteWord (DisplayTest,TextEnd); // ????????
WriteWord (Digit0,0);
WriteWord (Digit1,1);
WriteWord (Digit2,2);
WriteWord (Digit3,3);
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_4;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
RCC_OscInitStruct.PLL.PLLMBOOST = RCC_PLLMBOOST_DIV1;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 80;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLLVCIRANGE_0;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
|RCC_CLOCKTYPE_PCLK3;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief Power Configuration
* @retval None
*/
static void SystemPower_Config(void)
{
/*
* Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral
*/
HAL_PWREx_DisableUCPDDeadBattery();
/*
* Switch to SMPS regulator instead of LDO
*/
if (HAL_PWREx_ConfigSupply(PWR_SMPS_SUPPLY) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief ICACHE Initialization Function
* @param None
* @retval None
*/
static void MX_ICACHE_Init(void)
{
/* USER CODE BEGIN ICACHE_Init 0 */
/* USER CODE END ICACHE_Init 0 */
/* USER CODE BEGIN ICACHE_Init 1 */
/* USER CODE END ICACHE_Init 1 */
/** Enable instruction cache in 1-way (direct mapped cache)
*/
if (HAL_ICACHE_ConfigAssociativityMode(ICACHE_1WAY) != HAL_OK)
{
Error_Handler();
}
if (HAL_ICACHE_Enable() != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ICACHE_Init 2 */
/* USER CODE END ICACHE_Init 2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
while(1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
效果图:
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