问答

使用GD官方库做STM32F103的移植，对应的寄存器的命名方式都采用了官方库的形式。测试时发现每次重新上电AFIO_PCF0寄存器设置失败、I2C启动信号（第8bitstart）置位失败、RTC的频率写入失败。如果增加写入操作次数第一次写入失败，第二次写入成功。目前查到了这些异常，相关的外设配置没有发现问题，有大佬知道这是怎么回事吗？

udiv=(uclk+baudval/2U)/baudval;intdiv=udiv&0x0000fff0U;fradiv=udiv&0x0000000fU;}USART_BAUD(usart_periph)=((USART_BAUD_FRADIV|USART_BAUD_INTDIV)&(intdiv|fradiv));跟中代码发现走的上面的过程uclk=180000000,intdiv=?fradiv=?1.intdiv=456，fradiv=82.intdiv=65440，fradiv=8

CW32F003有没有BOOT引脚，是不是和STM32F0不一样。

使用串口超时中断时，对应的timer0计数时钟怎么选择？？

本帖最后由lonkyzhang于2022-4-2018:09编辑在官方库中没有smartcard的例程，我照着ST的方法写了一下初始化，使能了时钟，PB14的RST复位信号用示波器可以看到，但PB12的CLK对应管脚一直没有时钟信号，一直是低电平。使用的GD32F303RCT6代码如下，请教各位大神！感谢！unsignedcharInit_Card_Slot（unsignedcharInit_Psam_Slot(unsignedchar*Atr)｛rcu_periph_clock_enable(RCU_GPIOB);rcu_periph_clock_enable(RCU_USART2);gpio_init(GPIOB,GPIO_MODE_OUT_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_13);//VCCPB13gpio_init(GPIOB,GPIO_MODE_OUT_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_14);//RSTPB14gpio_init(GPIOB,GPIO_MODE_AF_OD,GPIO_OSPEED_50MHZ,GPIO_PIN_10);//IOPB10USART2TXgpio_init(GPIOB,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_12);//CLKPB12USART2CKgpio_bit_set(GPIOB,GPIO_PIN_13);//VCC=1//关闭失能usart_deinit(USART2);usart_disable(USART2);usart_synchronous_clock_disable(USART2);usart_transmit_config(USART2,USART_TRANSMIT_DISABLE);usart_receive_config(USART2,USART_RECEIVE_DISABLE);usart_hardware_flow_rts_config(USART2,USART_RTS_DISABLE);usart_hardware_flow_cts_config(USART2,USART_CTS_DISABLE);//配置传输格式usart_word_length_set(USART2,USART_WL_9BIT);usart_stop_bit_set(USART2,USART_STB_1_5BIT);usart_parity_config(USART2,USART_PM_EVEN);usart_transmit_config(USART2,USART_TRANSMIT_ENABLE);usart_receive_config(USART2,USART_RECEIVE_ENABLE);usart_synchronous_clock_config(USART2,USART_CLEN_NONE,USART_CPH_1CK,USART_CPL_LOW);usart_baudrate_set(USART2,9600);usart_guard_time_config(USART2,0x00);//其他模式失能usart_lin_mode_disable(USART2);usart_halfduplex_disable(USART2);usart_irda_mode_disable(USART2);//开启USART2usart_enable(USART2);gpio_bit_res

STM32--FSMC如何和TFT引脚连接

各位大佬好！我按照GD32F30x的标准库配置了GD32F305VG的timer0定时器并开启了输入捕获功能，配置代码如下：voidtimer_config(void){/*-----------------------------------------------------------------------timer_parameter_structtimer_initpara;timer_ic_parameter_structtimer_icinitpara;rcu_periph_clock_enable(RCU_TIMER0);timer_deinit(TIMER0);/*NVICconfig*/nvic_irq_enable(TIMER0_UP_TIMER9_IRQn,1,1);nvic_irq_enable(TIMER0_Channel_IRQn,1,0);/*TIMER0configuration*/timer_initpara.prescaler=119;timer_initpara.alignedmode=TIMER_COUNTER_EDGE;timer_initpara.counterdirection=TIMER_COUNTER_UP;timer_initpara.period=999;timer_initpara.clockdivision=TIMER_CKDIV_DIV1;timer_initpara.repetitioncounter=0;timer_init(TIMER0,&timer_initpara);timer_icinitpara.icpolarity=TIMER_IC_POLARITY_RISING;timer_icinitpara.icselection=TIMER_IC_SELECTION_DIRECTTI;timer_icinitpara.icprescaler=TIMER_IC_PSC_DIV1;timer_icinitpara.icfilter=0x0;timer_input_capture_config(TIMER0,TIMER_CH_0,&timer_icinitpara);timer_input_capture_config(TIMER0,TIMER_CH_3,&timer_icinitpara);/*auto-reloadpreloadenable*/timer_auto_reload_shadow_enable(TIMER0);timer_interrupt_flag_clear(TIMER0,TIMER_INT_FLAG_CH0);timer_interrupt_flag_clear(TIMER0,TIMER_INT_FLAG_CH3);timer_interrupt_enable(TIMER0,TIMER_INT_CH0);timer_interrupt_enable(TIMER0,TIMER_INT_CH3);timer_interrupt_enable(TIMER0,TIMER_INT_UP);timer_enable(TIMER0);}/*中断服务程序*/voidTIMER0_UP_TIMER9_IRQHandler(void){if(timer_interrupt_flag_get(TIMER0,TIMER_INT_FLAG_UP)!=RESET){timer_interrupt_flag_clear(TIMER0,TIMER_INT_FLAG_UP);timer0tick++;}}voidTIMER0_Channel_IRQHandler(){if(timer_interrupt

HK32T888C8T6性能和价格如何？哪里有规格书下载？

mm32f103c8t6没货，还是放弃mm吧