in stdlib version1.9.0, void I2S_Init(SPI_TypeDef* SPIx, I2S_InitTypeDef* I2S_InitStruct) { uint16_t tmpreg = 0, i2sdiv = 2, i2sodd = 0, packetlength = 1; uint32_t tmp = 0, i2sclk = 0; #ifndef I2S_EXTERNAL_CLOCK_VAL uint32_t pllm = 0, plln = 0,...

I use FSMC in STM32F407 to access external SRAM IS62WV51216. I read RM0090 and AN2784, gives me two fomulatSU means here is the timing graphhere is write timing graph​why WE have two falling edges on the leftwhat dose tSU tV mean,where is it in the t...

I am from China,I was told that STM32 hardware I2C has bug.So I always use software simulation I2C with two ordinary GPIO Pins. I was wondering what is the bug exactly?Is it a rumor ,or is it true?I hope get opinion from abroad website,because you sp...

I am simulating stm32f103c6 in proteus,I want to do timer2 interrupt ,I set pre = 7200-1,psc = 10000-1,so 1s to timer2 update interrupt.But time is not correct,it does not work.I look up information,it is said I need to change stm32 clk to 8MHz,not...