Ryo Od
/
Nucleo_sinewave_output
AnalogOut Test
main.cpp
- Committer:
- ryood
- Date:
- 2017-06-13
- Revision:
- 0:08b1f4a462c7
- Child:
- 1:28154deb13f1
File content as of revision 0:08b1f4a462c7:
#include "mbed.h" AnalogOut my_output1(PA_4); //AnalogOut my_output2(PA_5); //AnalogOut my_output3(PA_6); #define PI (3.141592653589793238462) #define AMPLITUDE (1.0) // x * 3.3V #define PHASE (PI * 1) // 2*pi is one period #define RANGE (0x7FFF) #define OFFSET (0x7FFF) // Configuration for sinewave output #define BUFFER_SIZE (360) uint16_t buffer[BUFFER_SIZE]; void calculate_sinewave(void); int main() { printf("Sinewave example\n"); calculate_sinewave(); while(1) { // sinewave output for (int i = 0; i < BUFFER_SIZE; i++) { my_output1.write_u16(buffer[i]); //my_output2.write_u16(buffer[i]); //my_output3.write_u16(buffer[i]); } } } // Create the sinewave buffer void calculate_sinewave(void){ for (int i = 0; i < BUFFER_SIZE; i++) { double rads = (PI * i)/180.0; // Convert degree in radian buffer[i] = (uint16_t)(AMPLITUDE * (RANGE * (cos(rads + PHASE))) + OFFSET); } }