PB3,PB4 的默认引脚功能是JTAG 或SWD功能 我们应该修改io的功能映射,涉及函数有 /*!\brief configure GPIO pin remap\param[in] gpio_remap: select the pin to remaponly one parameter can be selected which are shown as below:\arg GPIO_SPI0_REMAP: SPI0 …
isspace Python String isspace() function returns True if there are only whitespace characters in the string, otherwise it returns False. If the string is empty then isspace() function returns False. 如果字符串中仅包含空格字符,则Python String iss…