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编译环境: EWARM V5.30 硬件环境: DZY2.PCB STM32 FW: V3.0.0 作者 : szlihongtao ****************************************************************************** REV : V1.00 DATE : 2011-04-18 NOTE : *******************************************************************************/ #include “stm32f10x.h” #include “stm32_m.h” #include “dzy.h” #include “myRCC.h” //****************************************************************************** #define TIM1_CCR3_Address 0x40012C3C bit f_tb; // 基本定时标志 bit f_100ms, f_1000ms; INT16U cnt_test; // 计数器,仅供软件调试使用 float clk_sys; // 仅供软件调试使用 #if 1 uint16_t SRC_Buffer[ ] = { 72 * 5 }; // 由于载波频率取20kHZ,所以最大脉冲宽度不要超50us,即常数不要超过72*50 #else uint16_t SRC_Buffer[]= { 72*2,72*5,72*10,72*20,72*40,72*10}; // 由于载波频率取20kHZ,所以最大脉冲宽度不要超50us,即常数不要超过72*50 #endif //****************************************************************************** // 延时程序,单位为*1ms //****************************************************************************** void delayms( INT16U cnt ) { //#define CONST_1MS 7333 // 72MhZ //#define CONST_1MS 3588 // 32MhZ #define CONST_1MS (105*FCLK) INT16U i; __no_operation( ); while ( cnt-- ) for ( i = 0; i 《 CONST_1MS; i++ ) ; } //****************************************************************************** // pcb上的指示灯 //****************************************************************************** static void led_toggle( void ) { GPIOC-》ODR ^= GPIO_Pin_7; // led2 toogle GPIOC-》ODR ^= GPIO_Pin_6; // led3 toogle } //****************************************************************************** // 时钟设置初始化 //****************************************************************************** static void RCC_Configuration( void ) { ErrorStatus HSEStartUpStatus; /* RCC_AdjustHSICalibrationValue 调整内部高速晶振(HSI)校准值 RCC_ITConfig 使能或者失能指定的RCC中断 RCC_ClearFlag 清除RCC的复位标志位 RCC_GetITStatus 检查指定的RCC中断发生与否 RCC_ClearITPendingBit 清除RCC的中断待处理位 */ /* RCC system reset(for debug purpose) */ // 时钟系统复位 RCC_DeInit( ); // 使能外部的8M晶振 // 设置外部高速晶振(HSE) /* Enable HSE */ RCC_HSEConfig( RCC_HSE_ON ); // 使能或者失能内部高速晶振(HSI) RCC_HSICmd( DISABLE ); // 等待HSE起振 // 该函数将等待直到HSE就绪,或者在超时的情况下退出 /* Wait till HSE is ready */ HSEStartUpStatus = RCC_WaitForHSEStartUp( ); if ( HSEStartUpStatus == SUCCESS ) { // 设置AHB时钟(HCLK) RCC_HCLKConfig( RCC_HCLK_Div_ ); // 36 MHz // 设置低速AHB时钟(PCLK1) RCC_PCLK1Config( RCC_PCLK1_Div_ ); // 2.25 MHz // 设置高速AHB时钟(PCLK2) RCC_PCLK2Config( RCC_PCLK2_Div_ ); // 2.25 MHz /* ADCCLK = PCLK2/8 */ // 设置ADC时钟(ADCCLK) RCC_ADCCLKConfig( RCC_ADC_DIV_ ); // 0.281Mhz // 设置USB时钟(USBCLK) // USB时钟 = PLL时钟除以1.5 //RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5); // 设置外部低速晶振(LSE) RCC_LSEConfig( RCC_LSE_OFF ); // 使能或者失能内部低速晶振(LSI) // LSE晶振OFF RCC_LSICmd( DISABLE ); // 设置RTC时钟(RTCCLK) // 选择HSE时钟频率除以128作为RTC时钟 //RCC_RTCCLKConfig(RCC_RTCCLKSource_HSE_Div128); // 使能或者失能RTC时钟 // RTC时钟的新状态 RCC_RTCCLKCmd( DISABLE ); /* Flash 2 wait state */ FLASH_SetLatency( FLASH_Latency_2 ); /* Enable Prefetch Buffer */ FLASH_PrefetchBufferCmd( FLASH_PrefetchBuffer_Enable ); /* PLLCLK = 8MHz * 9 = 72 MHz */ // 设置PLL时钟源及倍频系数 RCC_PLLConfig( RCC_PLLSource_HSE_Div1, RCC_PLLMul_ ); /* Enable PLL */ // 使能或者失能PLL RCC_PLLCmd( ENABLE ); /* Wait till PLL is ready */ // 检查指定的RCC标志位设置与否 while ( RCC_GetFlagStatus( RCC_FLAG_PLLRDY ) == RESET ) { } /* Select PLL as system clock source */ // 设置系统时钟(SYSCLK) RCC_SYSCLKConfig( RCC_SYSCLKSource_PLLCLK ); /* Wait till PLL is used as system clock source */ // 返回用作系统时钟的时钟源 while ( RCC_GetSYSCLKSource( ) != 0x08 ) { } } // 使能或者失能AHB外设时钟 RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1 | RCC_AHBPeriph_DMA2 | RCC_AHBPeriph_SRAM | RCC_AHBPeriph_FLITF | RCC_AHBPeriph_CRC | RCC_AHBPeriph_FSMC | RCC_AHBPeriph_SDIO, DISABLE ); // 使能或者失能APB1外设时钟 RCC_APB1PeriphClockCmd( RCC_APB1Periph_ALL, DISABLE ); // 强制或者释放高速APB(APB2)外设复位 RCC_APB2PeriphResetCmd( RCC_APB2Periph_ALL, ENABLE ); // 退出复位状态 RCC_APB2PeriphResetCmd( RCC_APB2Periph_ALL, DISABLE ); // 强制或者释放低速APB(APB1)外设复位 RCC_APB1PeriphResetCmd( RCC_APB1Periph_ALL, ENABLE ); // 强制或者释放后备域复位 RCC_BackupResetCmd( ENABLE ); // 使能或者失能时钟安全系统 RCC_ClockSecuritySystemCmd( DISABLE ); } //****************************************************************************** // NVIC设置 //****************************************************************************** void NVIC_Configuration( void ) { NVIC_InitTypeDef NVIC_InitStructure; /* Configure one bit for preemption priority */ NVIC_PriorityGroupConfig( NVIC_PriorityGroup_1 ); NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //NVIC_Init(&NVIC_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //NVIC_Init(&NVIC_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init( &NVIC_InitStructure ); } //****************************************************************************** // SysTick设置初始化 //****************************************************************************** static void SysTick_Config1( void ) { #if 1 #define SystemFreq (FCLK*1000000.0) // 单位为Hz #define TB_SysTick (TIME_TB*1000) // 单位为uS,与示波器实测一致 static INT32U ticks; ticks = ( INT32U )( ( TB_SysTick / 1000000.0 ) * SystemFreq ); SysTick_Config( ticks ); #endif } //****************************************************************************** // GPIO设置 //****************************************************************************** static void GPIO_Configuration( void ) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD | RCC_APB2Periph_AFIO, ENABLE ); //------------------------------------------------------------------------------ GPIO_Write( GPIOA, 0xffff ); /* GPIOA Configuration: Channel 3 as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; GPIO_Init( GPIOA, &GPIO_InitStructure ); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; // GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; GPIO_Init( GPIOA, &GPIO_InitStructure ); //------------------------------------------------------------------------------ GPIO_Write( GPIOB, 0xffff ); // 11111101-11111111 /* GPIOB Configuration: Channel 3N as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; GPIO_Init( GPIOB, &GPIO_InitStructure ); //------------------------------------------------------------------------------ GPIO_Write( GPIOC, 0xff0f ); // 11111111-00001111 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_6 | GPIO_Pin_4 | GPIO_Pin_5; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init( GPIOC, &GPIO_InitStructure ); //------------------------------------------------------------------------------ GPIO_Write( GPIOD, 0xffff ); // 11111111-11111111 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_2; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init( GPIOD, &GPIO_InitStructure ); } //****************************************************************************** void DMA_Configuration( void ) { DMA_InitTypeDef DMA_InitStructure; RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1, ENABLE ); // dma1时钟使能 DMA_DeInit( DMA1_Channel5 ); // DMA复位 DMA_StructInit( &DMA_InitStructure ); // DMA缺省的参数 DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) TIM1_CCR3_Address; //外设地址 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) SRC_Buffer; //内存地址 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; //dma传输方向,单向 DMA_InitStructure.DMA_BufferSize = sizeof( SRC_Buffer ) / 2; //设置DMA在传输时缓冲区的长度 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //设置DMA的外设递增模式,一个外设 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //设置DMA的内存递增模式, DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //外设数据字长 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //内存数据字长 //循环模式开启,Buffer写满后,自动回到初始地址开始传输 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //设置DMA的传输模式 DMA_InitStructure.DMA_Priority = DMA_Priority_High; //设置DMA的优先级别 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //设置DMA的2个memory中的变量互相访问 DMA_Init( DMA1_Channel5, &DMA_InitStructure ); DMA_ClearFlag( DMA1_IT_TC5 ); DMA_ITConfig( DMA1_Channel5, DMA_IT_TC, ENABLE ); DMA_Cmd( DMA1_Channel5, ENABLE ); } /* TIM1 DMA Transfer example ------------------------------------------------- TIM1CLK = 72 MHz, Prescaler = 0, TIM1 counter clock = 72 MHz The TIM1 Channel3 is configured to generate a complementary PWM signal with a frequency equal to: TIM1 counter clock / (TIM1_Period + 1) = 17.57 KHz and a variable duty cycle that is changed by the DMA after a specific number of Update DMA request. The number of this repetitive requests is defined by the TIM1 Repetion counter, each 3 Update Requests, the TIM1 Channel 3 Duty Cycle changes to the next new value defined by the SRC_Buffer 。 |
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-----------------------------------------------------------------------------*/
//****************************************************************************** void Tim1_Configuration( void ) { INT16U TIM_Prescaler, TIM_Period; INT32U utemp; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB2PeriphClockCmd( RCC_APB2Periph_TIM1, ENABLE ); TIM_DeInit( TIM1 ); utemp = ( INT32U )( TIM1CLK * 1000000.0 ) / Freq_PWM; TIM_Prescaler = utemp / 65536; ++TIM_Prescaler; // 注意这句话,一定要++ utemp = ( INT32U )( TIM1CLK * 1000000.0 ) / TIM_Prescaler; // 分频后的定时器输入频率 TIM_Period = utemp / Freq_PWM; // 周期常数 TIM_TimeBaseStructure.TIM_Period = TIM_Period - 1; TIM_TimeBaseStructure.TIM_Prescaler = TIM_Prescaler - 1; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_RepetitionCounter = 1 - 1; // 每次直接更新 TIM_TimeBaseInit( TIM1, &TIM_TimeBaseStructure ); //------------------------------------------------------------------------------ /* PWM1 Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; // 使能输出比较状态 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable; // 失能输出比较N状态 TIM_OCInitStructure.TIM_Pulse = 72; /* TIM_OCMode_PWM2 TIM_OCPolarity_Low 正脉冲模式 TIM_OCMode_PWM2 TIM_OCPolarity_High 负脉冲模式 TIM_OCMode_PWM1 TIM_OCPolarity_Low 负脉冲模式 TIM_OCMode_PWM1 TIM_OCPolarity_High 正脉冲模式 TIM1_OCPolarity输出极性---TIM_OCPolarity_High,输出比较极性高,输出的是正脉冲 TIM1_OCPolarity输出极性---TIM_OCPolarity_Low, 输出比较极性低,输出的是负脉冲 */ TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; // 互补输出极性 // 选择空闲状态下的非工作状态 // 当MOE=0设置TIM1输出比较空闲状态 // 默认输出位低电平 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; // 选择空闲状态下的非工作状态 // 当MOE=0重置TIM1输出比较N空闲状态 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; TIM_OC3Init( TIM1, &TIM_OCInitStructure ); TIM_OC3PreloadConfig( TIM1, TIM_OCPreload_Enable ); // 使能TIMx在CCR1上的预装载寄存器 /* TIM1 Update DMA Request enable */ TIM_DMACmd( TIM1, TIM_DMA_Update, ENABLE ); //TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE); // 定时中断使能 //TIM_ITConfig(TIM1,TIM_IT_CC3,ENABLE); // 定时中断使能 TIM_Cmd( TIM1, ENABLE ); // 定时器开始运行 // 这条语句必须要有!!! TIM_CtrlPWMOutputs( TIM1, ENABLE ); /* Main Output Enable */ } //****************************************************************************** // 基本定时程序,周期为 TIME_TB //****************************************************************************** static func_tb( void ) { static INT16U tmr_100ms; static INT16U tmr_1000ms; if ( !f_tb ) return; f_tb = 0; if ( ++tmr_100ms 》= ( 100 / TIME_TB ) ) { tmr_100ms = 0; f_100ms = 1; GPIOC-》ODR ^= GPIO_Pin_4; // led5 toogle } if ( ++tmr_1000ms 》= ( 1000 / TIME_TB ) ) { tmr_1000ms = 0; f_1000ms = 1; GPIOC-》ODR ^= GPIO_Pin_5; // led4 toogle } } //****************************************************************************** // 进入睡眠模式 // 自行编写 //****************************************************************************** void myPWR_EnterSleepMode( void ) { //PWR-》CR |= CR_CWUF_Set; /* Clear Wake-up flag */ /* Set SLEEPDEEP bit of Cortex System Control Register */ //*(__IO uint32_t *) SCB_SysCtrl |= SysCtrl_SLEEPDEEP_Set; /* This option is used to ensure that store operations are completed */ __WFI( ); /* Request Wait For Interrupt */ } //****************************************************************************** // 主程序 //****************************************************************************** void main( void ) { int i; RCC_Configuration( ); GPIO_Configuration( ); delayms( 100 ); // 延时,等待电压稳定 Tim1_Configuration( ); DMA_Configuration( ); SysTick_Config1( ); NVIC_Configuration( ); //------------------------------------------------------------------------------ for ( i = 0; i 《 6; ++i ) { //i=0; //GPIOA-》ODR ^= GPIO_Pin_10; // led3 toogle //GPIOA-》ODR ^= GPIO_Pin_11; // led3 toogle delayms( 1 ); led_toggle( ); } //------------------------------------------------------------------------------ for ( ;; ) { //if (set_sw&0x01) //myPWR_EnterSleepMode(); // 休眠,降低功耗 func_tb( ); } } //****************************************************************************** #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 can add his own implementation to report the file name and line number, ex: printf(“Wrong parameters value: file %s on line %drn”, file, line) */ /* Infinite loop */ while (1) { } } #endif |
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/**
****************************************************************************** * @file Project/Template/stm32f10x_it.c * @author MCD Application Team * @version V3.0.0 * @date 04/06/2009 * @brief Main Interrupt Service Routines. * This file provides template for all exceptions handler and * peripherals interrupt service routine. ****************************************************************************** * @copy * * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. * * 《h2》《center》© COPYRIGHT 2009 STMicroelectronics《/center》《/h2》 */ /* Includes ------------------------------------------------------------------*/ #include “stm32f10x_it.h” #include “stm32_m.h” int tt; extern bit f_tb; // 基本定时标志 //****************************************************************************** /******************************************************************************/ /* Cortex-M3 Processor Exceptions Handlers */ /******************************************************************************/ /** * @brief This function handles NMI exception. * @param None * @retval : None */ void NMI_Handler( void ) { } /** * @brief This function handles Hard Fault exception. * @param None * @retval : None */ void HardFault_Handler( void ) { /* Go to infinite loop when Hard Fault exception occurs */ while ( 1 ) { } } /** * @brief This function handles Memory Manage exception. * @param None * @retval : None */ void MemManage_Handler( void ) { /* Go to infinite loop when Memory Manage exception occurs */ while ( 1 ) { } } /** * @brief This function handles Bus Fault exception. * @param None * @retval : None */ void BusFault_Handler( void ) { /* Go to infinite loop when Bus Fault exception occurs */ while ( 1 ) { } } /** * @brief This function handles Usage Fault exception. * @param None * @retval : None */ void UsageFault_Handler( void ) { /* Go to infinite loop when Usage Fault exception occurs */ while ( 1 ) { } } /** * @brief This function handles SVCall exception. * @param None * @retval : None */ void SVC_Handler( void ) { } /** * @brief This function handles Debug Monitor exception. * @param None * @retval : None */ void DebugMon_Handler( void ) { } /** * @brief This function handles PendSVC exception. * @param None * @retval : None */ void PendSV_Handler( void ) { } /** * @brief This function handles SysTick Handler. * @param None * @retval : None */ void SysTick_Handler( void ) { f_tb = 1; } /******************************************************************************/ /* STM32F10x Peripherals Interrupt Handlers */ /* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */ /* available peripheral interrupt handler‘s name please refer to the startup */ /* file (startup_stm32f10x_xx.s)。 */ /******************************************************************************/ void TIM1_UP_IRQHandler( void ) // 实际测量,周期为50US { tt = 1; TIM_ClearITPendingBit( TIM1, TIM_IT_Update ); } /******************************************************************************/ void TIM1_CC_IRQHandler( void ) { tt = 2; TIM_ClearITPendingBit( TIM1, TIM_IT_CC3 ); } /******************************************************************************/ void DMA1_Channel5_IRQHandler( void ) { tt = 3; DMA_ClearITPendingBit( DMA1_IT_TC5 ); GPIOA-》ODR ^= GPIO_Pin_11; // for test! } //****************************************************************************** /******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/ //****************************************************************************** |
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