main.cpp

00001 #include "mbed.h"
00002  
00003 SPI spi(D11, D12, D13);
00004 DigitalOut cs(D9);
00005 AnalogOut my_output(PA_4);
00006 int SIZE;
00007  
00008 int main() {
00009     while(1)
00010     {
00011     // Chip must be deselected
00012     cs = 1;
00013  
00014     // Setup the spi for 8 bit data, high steady state clock,
00015     // second edge capture, with a 1MHz clock rate
00016     spi.format(8,0);
00017     spi.frequency(1000000);
00018  
00019     // Select the device by seting chip select low
00020     cs = 0;
00021  
00022     // Send 0x8f, the command to read the WHOAMI register
00023     spi.write(0x03);
00024     spi.write(0x00);
00025     spi.write(0x00);
00026     spi.write(0x00);
00027      
00028     // Send a dummy byte to receive the contents of the WHOAMI register
00029     SIZE = 600000;
00030     for(int i=0; i<SIZE; i++)
00031     {
00032     uint16_t sample = spi.write(0x01);
00033    // my_output.write_u16(sample);
00034     //wait_us(125);
00035     }
00036     // Deselect the device
00037     cs = 1;
00038     }
00039     }