Something wrong

double calc( int angel) { return sin(2*pi*(5/48000)*l); } Why do the function always returns zero?
Something wrong with my keil?

Hi, I have tested my ARM7 stamp baord with some of the supplied test HEX files including UART test with Tera Term. All good. My problem however is when I generate the hex files myself with Keil uv3...
something wrong with DK-ARM dev tools

hi: I installed the DK-ARM dev tools,including uv3 IDE and GNU gcc which are both supplied by the keil company.I opne the Demo project: keil\arm\gnu\measure\measure.uv2.Nothing to do but directly click...
SPI communication between two STM32 microcontroller

Hello everyone, I am trying to communication between two STM32F4 microcontroller using SPI protocol. here i am using SPI3. Here i am configuring one STM32 as master & the other as Slave. I have...
stm32 f446re ADC problem - fluctuations or something

Hi i dont know how use ADC. I have very strange readings: On Vref: http://i.imgur.com/6eHe2k5.png (chanel17) On PA1: http://i.imgur.com/ZtxtBVF.png (chanel1) My code: int main(void) { SysTick_Config...