请问STM32F030的SWD口如何做普通IO

只要把SWD功能禁用就可以了

GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable,ENABLE);

RCC中开启AFIO时钟

F0不是103

/**
  * @brief  Writes data to the specified GPIO data port.
  * @param  GPIOx: where x can be (A or B) to select the GPIO peripheral.
  * @param  GPIO_PinSource: specifies the pin for the Alternate function.
  *          This parameter can be GPIO_PinSourcex where x can be (0..15).
  * @param  GPIO_AF: selects the pin to used as Alternate function.
  *          This parameter can be one of the following value:
  *            @arg GPIO_AF_0: WKUP, EVENTOUT, TIM15, SPI1, TIM17,MCO, SWDAT, SWCLK, TIM14,
  *                            USART1, CEC, IR_OUT, SPI2
  *            @arg GPIO_AF_1: USART2, CEC, Tim3, USART1, IR_OUT,EVENTOUT, I2C1, I2C2, TIM15
  *            @arg GPIO_AF_2: TIM2, TIM1, EVENTOUT, TIM16, TIM17
  *            @arg GPIO_AF_3: TS, I2C1, TIM15, EVENTOUT
  *            @arg GPIO_AF_4: TIM14, I2C1 (only for STM32F0XX_LD and STM32F030X6 devices)
  *            @arg GPIO_AF_5: TIM16, TIM17
  *            @arg GPIO_AF_6: EVENTOUT
  *            @arg GPIO_AF_7: COMP1 OUT, COMP2 OUT
  * @note   The pin should already been configured in Alternate Function mode(AF)
  *         using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
  * @note   Refer to the Alternate function mapping table in the device datasheet
  *         for the detailed mapping of the system and peripherals'alternate
  *         function I/O pins.
  * @retval None
  */
void GPIO_PinAFConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF)
{
  uint32_t temp = 0x00;
  uint32_t temp_2 = 0x00;

  /* Check the parameters */
  assert_param(IS_GPIO_LIST_PERIPH(GPIOx));
  assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
  assert_param(IS_GPIO_AF(GPIO_AF));

  temp = ((uint32_t)(GPIO_AF) << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4));
  GPIOx->AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t)0xF << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4));
  temp_2 = GPIOx->AFR[GPIO_PinSource >> 0x03] | temp;
  GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2;
}


默认是 GPIO_AF_0，是swd，那做普通io呢？

f030

这个还真没有试过，各种配置方式都试试，把引脚配置成复用模式，试试。

Once the SW I/O is released by the user software, the GPIO controller takes control of these
pins. The reset states of the GPIO control registers put the I/Os in the equivalent states:
• SWDIO: input pull-up
• SWCLK: input pull-down
Having embedded pull-up and pull-down resistors removes the need to add external
resistors.

F0参考手册，如2楼所说，你需要释放掉SWD功能

SWD脚复位后默认是调试脚，

把它做普通IO配置就好了。具体就是将GPIOX_MODER寄存器相关位做配置就好，比STM32F1配置更为简洁。

SWD在CUBE里设置很简单的，但是你下次下载程序就只能用串口。

用cube来设置很简单

禁用即可，但是以后烧录就麻烦了