I'm trying to use the hardware controled NSS pin, but I'm getting some trouble. According to the Reference Manual: 'The NSS signal is driven low as soon as the SPI is enabled in master mode (SPE=1), and is kept low until the SPI is disabled (SPE =0).' -The HAL enable the SP...
问:使用SPI外设时如何设定NSS为通用IO口?答:主模式和从模式下均可以由软件或硬件进行NSS管理; 将SPI_CR1寄存器的SSM位置为1时,NSS引脚将被释放出来用作GPIO口; 使用STM32软件库时,初始化SPI外设时,使用如下代码: SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; 如果NSS引脚用于其他外设时,需要使能NSS输出...