mbed official
SPI Hello World
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main.cpp
00001 #include "mbed.h" 00002 00003 SPI spi(p5, p6, p7); // mosi, miso, sclk 00004 DigitalOut cs(p8); 00005 00006 int main() { 00007 // Chip must be deselected 00008 cs = 1; 00009 00010 // Setup the spi for 8 bit data, high steady state clock, 00011 // second edge capture, with a 1MHz clock rate 00012 spi.format(8,3); 00013 spi.frequency(1000000); 00014 00015 // Select the device by seting chip select low 00016 cs = 0; 00017 00018 // Send 0x8f, the command to read the WHOAMI register 00019 spi.write(0x8F); 00020 00021 // Send a dummy byte to receive the contents of the WHOAMI register 00022 int whoami = spi.write(0x00); 00023 printf("WHOAMI register = 0x%X\n", whoami); 00024 00025 // Deselect the device 00026 cs = 1; 00027 }
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