/* USER CODE BEGIN Header */ /** ****************************************************************************** * File Name : freertos.c * Description : Code for freertos applications ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * @file freertos.c * ****************************************************************************** */ /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "FreeRTOS.h" #include "task.h" #include "main.h" #include "cmsis_os.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include // 添加标准整型定义 #include "stm32f4xx_hal.h" // 添加HAL库定义 #include "dac161s997.h" #include "ad7124.h" #include "usart.h" #include "communication_protocol.h" #include "tim.h" #include "gpio.h" #include "tcpserverc.h" #include "lwip.h" #include "lwip/tcp.h" // 添加TCP相关定义 #include "uart_lcd.h" #include "user_gpio.h" #include "linear_encoder.h" #include "lan8742.h" #include "ad7124_test.h" #include // 添加string.h用于字符串操作 #include "ht1200m.h" #include "TCA6416.h" // 添加TCA6416头文件 #include "DAC8568.h" // 声明外部变量 extern ad7124_analog_t ad7124_analog[AD7124_CHANNEL_EN_MAX]; /* 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 Variables */ osThreadId lwip_taskHandle; osThreadId led_taskHandle; osThreadId dac_taskHandle; osThreadId adc_taskHandle; osThreadId gpio_di_do_taskHandle; osThreadId ec11_taskHandle; osThreadId ad7124_test_taskHandle; osThreadId usart6_test_taskHandle; // 添加USART6测试任务句柄 osThreadId tca6416_taskHandle; // 添加TCA6416任务句柄 osThreadId dac161s997_test_taskHandle; // 添加DAC161S997测试任务句柄 osThreadId dac8568_test_taskHandle; // 添加DAC8568测试任务句柄 // 添加调试变量 static volatile uint32_t uart6_dr_raw = 0; // UART数据寄存器的原始值 static volatile uint8_t uart6_data_bits = 0; // 数据位(8位) static volatile uint8_t uart6_parity_bit = 0; // 校验位 static volatile uint8_t uart6_stop_bits = 0; // 停止位 static volatile uint8_t uart6_error_flags = 0; // 错误标志 // 添加RTS引脚监控变量 volatile GPIO_PinState rts_pin_state = GPIO_PIN_RESET; // RTS引脚当前状态 volatile GPIO_PinState rst_pin_state = GPIO_PIN_RESET; // RTS引脚当前状态 volatile uint32_t rts_pin_pull = 0; // RTS引脚上下拉配置 volatile uint32_t rts_pin_mode = 0; // RTS引脚模式 volatile uint32_t rts_pin_speed = 0; // RTS引脚速度 volatile uint32_t rts_pin_alternate = 0; // RTS引脚复用功能 // 添加全局变量用于存储TCA6416引脚状态 volatile uint8_t tca6416_port0_status = 0; // 第一个TCA6416的Port0状态 volatile uint8_t tca6416_port1_status = 0; // 第一个TCA6416的Port1状态 volatile uint8_t tca6416_port2_status = 0; // 第二个TCA6416的Port0状态 volatile uint8_t tca6416_port3_status = 0; // 第二个TCA6416的Port1状态 volatile uint8_t tca6416_port4_status = 0; // 第三个TCA6416的Port0状态 volatile uint8_t tca6416_port5_status = 0; // 第三个TCA6416的Port1状态 // 添加TCA6416测试相关的调试变量 volatile uint8_t tca6416_test_step = 0; // 当前测试步骤 volatile uint8_t tca6416_init_result = 0xFF; // 初始化结果 volatile uint8_t tca6416_init2_result = 0xFF; // 第二个芯片初始化结果 volatile uint8_t tca6416_init3_result = 0xFF; // 第三个芯片初始化结果 volatile uint8_t tca6416_write_data = 0; // 写入的数据 volatile uint8_t tca6416_read_data = 0; // 读取的数据 volatile uint8_t tca6416_error_count = 0; // 错误计数 volatile uint8_t tca6416_test_pattern = 0; // 测试模式 volatile uint8_t tca6416_port0_dir = 0; // Port0方向寄存器值 volatile uint8_t tca6416_port1_dir = 0; // Port1方向寄存器值 volatile uint8_t tca6416_i2c_ack_status = 0; // I2C应答状态 // 添加接收缓冲区 static uint8_t uart6_rx_buffer[1]; static volatile uint8_t uart6_rx_data = 0; static volatile uint8_t uart6_rx_flag = 0; // 添加数据缓冲相关变量 #define UART6_BUFFER_SIZE 128 #define UART6_TIMEOUT_MS 50 // 50ms超时,认为数据包结束 static uint8_t uart6_data_buffer[UART6_BUFFER_SIZE]; static volatile uint16_t uart6_buffer_index = 0; static volatile uint32_t uart6_last_rx_time = 0; /* USER CODE END Variables */ /* Private function prototypes -----------------------------------------------*/ /* USER CODE BEGIN FunctionPrototypes */ extern float current_buff[2]; extern struct netif gnetif; extern ETH_HandleTypeDef heth; extern struct tcp_pcb *server_pcb_hart1; extern struct tcp_pcb *server_pcb_hart2; extern struct tcp_pcb *server_pcb_ble1; extern struct tcp_pcb *server_pcb_ble2; extern struct tcp_pcb *server_pcb_control; extern void tcp_abort(struct tcp_pcb *pcb); void start_usart6_test_task(void const *argument); // 添加USART6测试任务函数声明 void start_tca6416_task(void const *argument); // 添加TCA6416任务函数声明 void test_tca6416_task(void const *argument); // 添加TCA6416测试任务函数声明 void start_dac161s997_test_task(void const *argument); // 添加DAC161S997测试任务函数声明 void start_dac8568_test_task(void const *argument); // 添加DAC8568测试任务函数声明 /* USER CODE END FunctionPrototypes */ void start_tcp_task(void const *argument); void start_led_toggle_task(void const *argument); void start_dac_task(void const *argument); void start_adc_task(void const *argument); void start_gpio_di_do_task(void const *argument); void start_ec11_task(void const *argument); void start_ad7124_test_task(void const *argument); void ad7124_multi_channel_init(uint8_t sample_rate); void start_adc_task(void const *argument); void test_cs_pin(void); extern void MX_LWIP_Init(void); void MX_FREERTOS_Init(void); /* (MISRA C 2004 rule 8.1) */ /* GetIdleTaskMemory prototype (linked to static allocation support) */ void vApplicationGetIdleTaskMemory(StaticTask_t **ppxIdleTaskTCBBuffer, StackType_t **ppxIdleTaskStackBuffer, uint32_t *pulIdleTaskStackSize); /* USER CODE BEGIN GET_IDLE_TASK_MEMORY */ static StaticTask_t xIdleTaskTCBBuffer; static StackType_t xIdleStack[configMINIMAL_STACK_SIZE]; void vApplicationGetIdleTaskMemory(StaticTask_t **ppxIdleTaskTCBBuffer, StackType_t **ppxIdleTaskStackBuffer, uint32_t *pulIdleTaskStackSize) { *ppxIdleTaskTCBBuffer = &xIdleTaskTCBBuffer; *ppxIdleTaskStackBuffer = &xIdleStack[0]; *pulIdleTaskStackSize = configMINIMAL_STACK_SIZE; /* place for user code */ } /* USER CODE END GET_IDLE_TASK_MEMORY */ /** * @brief FreeRTOS initialization * @param None * @retval None */ void MX_FREERTOS_Init(void) { /* USER CODE BEGIN Init */ /* Create the thread(s) */ /* definition and creation of lwip_task */ osThreadDef(lwip_task, start_tcp_task, osPriorityHigh, 0, 512); lwip_taskHandle = osThreadCreate(osThread(lwip_task), NULL); osThreadDef(adc_task, start_adc_task, osPriorityBelowNormal, 0, 128); adc_taskHandle = osThreadCreate(osThread(adc_task), NULL); /* HART测试任务 */ osThreadDef(usart6_test_task, start_usart6_test_task, osPriorityNormal, 0, 128); usart6_test_taskHandle = osThreadCreate(osThread(usart6_test_task), NULL); /* TCA6416任务 */ osThreadDef(tca6416_task, test_tca6416_task, osPriorityNormal, 0, 128); tca6416_taskHandle = osThreadCreate(osThread(tca6416_task), NULL); /* DAC161S997测试任务 */ osThreadDef(dac161s997_test_task, start_dac161s997_test_task, osPriorityNormal, 0, 128); dac161s997_test_taskHandle = osThreadCreate(osThread(dac161s997_test_task), NULL); /* DAC8568测试任务 */ osThreadDef(dac8568_test_task, start_dac8568_test_task, osPriorityLow, 0, 256); dac8568_test_taskHandle = osThreadCreate(osThread(dac8568_test_task), NULL); /* USER CODE BEGIN RTOS_THREADS */ /* add threads, ... */ /* USER CODE END RTOS_THREADS */ } /* USER CODE BEGIN Header_start_tcp_task */ /** * @brief Function implementing the lwip_task thread. * @param argument: Not used * @retval None */ /* USER CODE END Header_start_tcp_task */ void start_tcp_task(void const *argument) { /* init code for LWIP */ MX_LWIP_Init(); /* USER CODE BEGIN start_tcp_task */ tcp_echo_init(); uart_lcd_draw_ipaddr(); // 初始化显示IP地址信息 /* Infinite loop */ for (;;) { uint32_t phyreg = 0; HAL_ETH_ReadPHYRegister(&heth, 0x00, PHY_BSR, &phyreg); if (((phyreg >> 2) & 0x1) != 0x1) { /* When the netif link is down this function must be called */ netif_set_link_down(&gnetif); netif_set_down(&gnetif); // 热插拔下线时调用 if (tcp_echo_flags_hart1 == 1) { tcp_abort(server_pcb_hart1); // 热插拔下线时调用 tcp_echo_flags_hart1 = 0; } if (tcp_echo_flags_hart2 == 1) { tcp_abort(server_pcb_hart2); // 热插拔下线时调用 tcp_echo_flags_hart2 = 0; } #if (BLE2_USART6 == 1) if (tcp_echo_flags_ble1 == 1) { tcp_abort(server_pcb_ble1); // 热插拔下线时调用 tcp_echo_flags_ble1 = 0; } #endif if (tcp_echo_flags_ble2 == 1) { tcp_abort(server_pcb_ble2); // 热插拔下线时调用 tcp_echo_flags_ble2 = 0; } if (tcp_echo_flags_control == 1) { tcp_abort(server_pcb_control); // 热插拔下线时调用 tcp_echo_flags_control = 0; } } else { /* When the netif is fully configured this function must be called */ netif_set_link_up(&gnetif); netif_set_up(&gnetif); // 热插拔上线时调用 // if (tcp_echo_flags_ble1 == 2) // { // tcp_echo_init(); // 热插拔上线时调用 // // uart_lcd_draw_ipaddr(); // 初始化显示IP地址信息 // tcp_echo_flags_ble1 = 0; // } } vTaskDelay(1000); // osThreadTerminate(NULL); } /* USER CODE END start_tcp_task */ } /* USER CODE BEGIN Header_start_led_toggle_task */ /** * @brief Function implementing the led_task thread. * @param argument: Not used * @retval None */ /* USER CODE END Header_start_led_toggle_task */ void start_led_toggle_task(void const *argument) { /* USER CODE BEGIN start_led_toggle_task */ /* Infinite loop */ for (;;) { HAL_GPIO_TogglePin(LED3_G_GPIO_Port, LED3_G_Pin); uart_lcd_ecll_control_current_out(); vTaskDelay(500); } /* USER CODE END start_led_toggle_task */ } /* USER CODE BEGIN Header_start_adc_task */ /** * @brief ADC任务函数实现 * @param argument: 未使用 * @retval None */ /* USER CODE END Header_start_adc_task */ void start_adc_task(void const *argument) { /* USER CODE BEGIN start_adc_task */ // 初始化两个AD7124设备 ad7124_setup(1); // 初始化两个AD7124设备 ad7124_setup(2); // 初始化两个AD7124设备 /* Infinite loop */ for (;;) { // 读取第一个AD7124的所有通道 for (uint8_t ch = AD7124_AIN0; ch < AD7124_CHANNEL_EN_MAX; ch++) { ad7124_get_analog(ch, 1); } // 读取第二个AD7124的所有通道 for (uint8_t ch = AD7124_AIN0; ch < AD7124_CHANNEL_EN_MAX; ch++) { ad7124_get_analog(ch, 2); } vTaskDelay(10); } /* USER CODE END start_adc_task */ } /* USER CODE BEGIN Header_start_gpio_di_do_task */ /** * @brief Function implementing the gpio_di_do_task thread. * @param argument: Not used * @retval None */ /* USER CODE END Header_start_gpio_di_do_task */ void start_gpio_di_do_task(void const *argument) { /* USER CODE BEGIN start_gpio_di_do_task */ /* Infinite loop */ for (;;) { user_gpio_trigger(); vTaskDelay(100); } /* USER CODE END start_gpio_di_do_task */ } /* USER CODE BEGIN Header_start_ec11_task */ /** * @brief Function implementing the ec11_task thread. * @param argument: Not used * @retval None */ /* USER CODE END Header_start_ec11_task */ void start_ec11_task(void const *argument) { /* USER CODE BEGIN start_ec11_task */ /* Infinite loop */ for (;;) { linear_encoder_get_data(); uart_lcd_ec11_control_current(); uart_forwarding_tcp(); vTaskDelay(10); } /* USER CODE END start_ec11_task */ } // 添加UART接收回调函数声明 static void UART6_RxCpltCallback(void); // UART接收完成回调函数 static void UART6_RxCpltCallback(void) { uart6_rx_data = uart6_rx_buffer[0]; uart6_rx_flag = 1; // 重新启动接收 HAL_UART_Receive_IT(&huart6, uart6_rx_buffer, 1); } //HART1 串口测试任务 void start_usart6_test_task(void const *argument) { /* USER CODE BEGIN start_usart6_test_task */ err_t err; uint32_t current_time; // 确保UART6已正确初始化 if (huart6.Instance == NULL) { Error_Handler(); } // 重新初始化UART6 HAL_UART_DeInit(&huart6); huart6.Init.BaudRate = 1200; huart6.Init.WordLength = UART_WORDLENGTH_8B; huart6.Init.StopBits = UART_STOPBITS_1; huart6.Init.Parity = UART_PARITY_NONE; huart6.Init.Mode = UART_MODE_TX_RX; huart6.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart6.Init.OverSampling = UART_OVERSAMPLING_16; // 清除所有标志位 __HAL_UART_CLEAR_FLAG(&huart6, UART_FLAG_RXNE); __HAL_UART_CLEAR_FLAG(&huart6, UART_FLAG_PE); __HAL_UART_CLEAR_FLAG(&huart6, UART_FLAG_FE); __HAL_UART_CLEAR_FLAG(&huart6, UART_FLAG_ORE); if (HAL_UART_Init(&huart6) != HAL_OK) { Error_Handler(); } // 初始化缓冲区 uart6_buffer_index = 0; uart6_last_rx_time = 0; /* Infinite loop */ for(;;) { current_time = HAL_GetTick(); // 直接检查接收标志 if (__HAL_UART_GET_FLAG(&huart6, UART_FLAG_RXNE)) { // 读取数据寄存器的原始值 uart6_dr_raw = huart6.Instance->DR; // 解析数据寄存器的各个位 uart6_data_bits = (uint8_t)(uart6_dr_raw & 0xFF); // 低8位是数据位 uart6_parity_bit = (uint8_t)((uart6_dr_raw >> 8) & 0x1); // 第9位是校验位 uart6_stop_bits = (uint8_t)((uart6_dr_raw >> 9) & 0x3); // 第10-11位是停止位 // 存储错误标志 uart6_error_flags = 0; if (__HAL_UART_GET_FLAG(&huart6, UART_FLAG_PE)) uart6_error_flags |= 0x01; if (__HAL_UART_GET_FLAG(&huart6, UART_FLAG_FE)) uart6_error_flags |= 0x02; if (__HAL_UART_GET_FLAG(&huart6, UART_FLAG_ORE)) uart6_error_flags |= 0x04; // 检查是否有接收错误 if (uart6_error_flags == 0) { // 将数据添加到缓冲区 if (uart6_buffer_index < UART6_BUFFER_SIZE) { uart6_data_buffer[uart6_buffer_index++] = uart6_data_bits; uart6_last_rx_time = current_time; // 更新最后接收时间 } else { // 缓冲区满,强制发送 if (server_pcb_control != NULL && tcp_echo_flags_control == 1 && uart6_buffer_index > 0) { err = tcp_write(server_pcb_control, uart6_data_buffer, uart6_buffer_index, 1); if (err == ERR_OK) { tcp_output(server_pcb_control); } } // 重置缓冲区 uart6_buffer_index = 0; uart6_data_buffer[uart6_buffer_index++] = uart6_data_bits; uart6_last_rx_time = current_time; } } else { // 清除错误标志 __HAL_UART_CLEAR_FLAG(&huart6, UART_FLAG_PE); __HAL_UART_CLEAR_FLAG(&huart6, UART_FLAG_FE); __HAL_UART_CLEAR_FLAG(&huart6, UART_FLAG_ORE); } } // 检查超时,如果超时且有数据则发送 if (uart6_buffer_index > 0 && uart6_last_rx_time > 0 && (current_time - uart6_last_rx_time) >= UART6_TIMEOUT_MS) { // 检查TCP连接状态并发送缓冲区数据 if (server_pcb_control != NULL && tcp_echo_flags_control == 1) { err = tcp_write(server_pcb_control, uart6_data_buffer, uart6_buffer_index, 1); if (err == ERR_OK) { err = tcp_output(server_pcb_control); if (err != ERR_OK) { // TCP输出失败,关闭连接 tcp_abort(server_pcb_control); server_pcb_control = NULL; tcp_echo_flags_control = 0; } } else if (err == ERR_MEM) { // 内存不足,等待一段时间后重试 vTaskDelay(10); continue; // 不清除缓冲区,下次重试 } else { // 其他错误(如连接已关闭),关闭连接 tcp_abort(server_pcb_control); server_pcb_control = NULL; tcp_echo_flags_control = 0; } } // 重置缓冲区 uart6_buffer_index = 0; uart6_last_rx_time = 0; } vTaskDelay(5); // 给其他任务执行的机会 } /* USER CODE END start_usart6_test_task */ } void start_usart6_dma_test_task(void const *argument) { } void test_tca6416_task(void const *argument) { /* USER CODE BEGIN test_tca6416_task */ uint8_t ret = 0; uint8_t addr_scan_result[8] = {0}; // 存储地址扫描结果 // 等待系统稳定 osDelay(100); // 步骤0: I2C地址扫描 tca6416_test_step = 0; for(uint8_t addr = 0x20; addr <= 0x27; addr++) { I2C_Start(); ret = I2C_SendByte(addr << 1); I2C_Stop(); addr_scan_result[addr - 0x20] = ret; // 0=ACK, 1=NACK osDelay(10); } // 步骤1: 初始化第一个TCA6416芯片 tca6416_test_step = 1; tca6416_init_result = TCA6416_Init(); // 步骤2: 初始化第二个TCA6416芯片(地址0x21) tca6416_test_step = 2; tca6416_init2_result = TCA6416_Init2(); // 步骤3: 初始化第三个TCA6416芯片(地址0x20,第二条总线) tca6416_test_step = 3; tca6416_init3_result = TCA6416_Init3(); // 设置第一个芯片Port0和Port1为输出(0=输出,1=输入) // 注意:输出状态由tcpecho_recv_control控制,这里只设置方向 ret = TCA6416_SetPortDirection(0, 0x00); // Port0全部设为输出 osDelay(10); ret = TCA6416_SetPortDirection(1, 0x00); // Port1全部设为输出 osDelay(10); // 步骤5: 配置第二、三个芯片所有IO为输入模式 tca6416_test_step = 5; // 第二个芯片设为输入 if(tca6416_init2_result == 0) { TCA6416_SetPortDirection2(0, 0xFF); // Port0全部设为输入 osDelay(10); TCA6416_SetPortDirection2(1, 0xFF); // Port1全部设为输入 osDelay(10); } // 第三个芯片设为输入 if(tca6416_init3_result == 0) { TCA6416_SetPortDirection3(0, 0xFF); // Port0全部设为输入 osDelay(10); TCA6416_SetPortDirection3(1, 0xFF); // Port1全部设为输入 osDelay(10); } // 步骤6: 循环检测所有芯片状态 tca6416_test_step = 6; for(;;) { // 读取第一个芯片状态(由tcpecho_recv_control控制输出) if(TCA6416_ReadPort(0, &tca6416_read_data) == 0) { tca6416_port0_status = tca6416_read_data; } osDelay(10); if(TCA6416_ReadPort(1, &tca6416_read_data) == 0) { tca6416_port1_status = tca6416_read_data; } osDelay(10); // 读取第二个芯片状态(如果初始化成功) if(tca6416_init2_result == 0) { if(TCA6416_ReadPort2(0, &tca6416_read_data) == 0) { tca6416_port2_status = tca6416_read_data; } osDelay(10); if(TCA6416_ReadPort2(1, &tca6416_read_data) == 0) { tca6416_port3_status = tca6416_read_data; } osDelay(10); } // 读取第三个芯片状态(如果初始化成功) if(tca6416_init3_result == 0) { if(TCA6416_ReadPort3(0, &tca6416_read_data) == 0) { tca6416_port4_status = tca6416_read_data; } osDelay(10); if(TCA6416_ReadPort3(1, &tca6416_read_data) == 0) { tca6416_port5_status = tca6416_read_data; } osDelay(10); } // 总延时1秒后重复 osDelay(800); } /* USER CODE END test_tca6416_task */ } /* USER CODE BEGIN Header_start_dac161s997_test_task */ /** * @brief Function implementing the dac161s997_test_task thread. * @param argument: Not used * @retval None */ /* USER CODE END Header_start_dac161s997_test_task */ void start_dac161s997_test_task(void const *argument) { /* USER CODE BEGIN start_dac161s997_test_task */ // 等待系统稳定 osDelay(1000); // 启动延时1秒等待系统稳定 // 初始化DAC dac161s997_init(); // 读取初始状态 uint16_t init_status = dac161s997_read_status(DAC161S997); if(init_status == 0xFFFF || init_status == 0x0000) { // SPI通信有问题,重新初始化 osDelay(100); dac161s997_init(); } /* Infinite loop */ for (;;) { // 设置输出电流为10mA current_buff[0] = 12.0f; dac161s997_output(DAC161S997, current_buff[0]); // // 读取状态确认写入成功 // uint16_t status = dac161s997_read_status(DAC161S997); // if(status == 0xFFFF || status == 0x0000) { // // 如果通信失败,重试写入 // osDelay(10); // dac161s997_output(DAC161S997, current_buff[0]); // } osDelay(100); // 延时100ms } /* USER CODE END start_dac161s997_test_task */ } /* USER CODE BEGIN Header_start_dac8568_test_task */ /** * @brief Function implementing the dac8568_test_task thread. * @param argument: Not used * @retval None */ /* USER CODE END Header_start_dac8568_test_task */ void start_dac8568_test_task(void const *argument) { // 初始化DAC8568 DAC8568_Init(&hspi3); // 使用SPI3 HAL_Delay(10); // 启用静态内部参考(2.5V) DAC8568_EnableStaticInternalRef(); while(1) { uint16_t i = 65535; //DAC8568_WriteAndUpdate(CHANNEL_A, (uint16_t)i); //DAC8568_WriteAndUpdate(CHANNEL_B, (uint16_t)i); //DAC8568_WriteAndUpdate(CHANNEL_C, (uint16_t)i); //DAC8568_WriteAndUpdate(CHANNEL_D, (uint16_t)i); DAC8568_WriteAndUpdate(CHANNEL_E, (uint16_t)i); //DAC8568_WriteAndUpdate(CHANNEL_F, (uint16_t)i); DAC8568_WriteAndUpdate(CHANNEL_G, (uint16_t)i); //DAC8568_WriteAndUpdate(CHANNEL_H, (uint16_t)i); // for (int i = 65535; i >= 0; i = i - 4096) // 从65535到0,步长4096 // { // // 写入并更新所有通道的值 // DAC8568_WriteAndUpdate(BROADCAST, (uint16_t)i); // // 计算电压值 (假设Vref=2.5V,16位分辨率,2倍增益) // float voltage = 2.5f * 2.0f * i / 65536.0f; // 延时2秒 osDelay(2000); //} } }