main.cpp

00001 #include "mbed.h"
00002 #include "DirectSPI.h"
00003 
00004 
00005 /* SPI1 */
00006 #define MOSI      SPI_MOSI  /* D11  PA_7 */
00007 #define MISO      SPI_MISO  /* D12  PA_6 */
00008 #define SCLK      SPI_SCK   /* D13  PA_5 */
00009 #define CS        SPI_CS    /* D10  PB_6 */
00010 
00011 DirectSPI spi(MOSI, MISO, SCLK); // mosi, miso, sclk
00012 DigitalOut cs(CS);
00013 
00014 /* auto width transfer test */
00015 void test_auto() {
00016     spi.format(8,3);
00017     while(1){
00018         cs = 1;
00019         spi.directWrite(0xaa);
00020         spi.directWrite(0xaa);
00021         cs = 0;
00022     }
00023 }
00024 
00025 /* 8bit width transfer test */
00026 void test_bit8() {
00027     spi.format(8,3);
00028     while(1){
00029         cs = 1;
00030         spi.directWrite8(0xaa);
00031         spi.directWrite8(0xaa);
00032         cs = 0;
00033     }
00034 }
00035 
00036 /* 16bit width transfer test */
00037 void test_bit16() {
00038     spi.format(16,3);
00039     while(1){
00040         cs = 1;
00041         spi.directWrite16(0x5503);
00042         spi.directWrite16(0x5503);
00043         cs = 0;
00044     }
00045 }
00046 
00047 /* 8bit width transfer test using standard library*/
00048 void test_std8() {
00049     spi.format(8,3);
00050     while(1){
00051         cs = 1;
00052         spi.write(0xaa);
00053         spi.write(0xaa);
00054         cs = 0;
00055     }
00056 }
00057 
00058 int main(){
00059     spi.frequency(24 * 1000000);
00060 
00061     /* Select the one of the test function */
00062     //test_auto();
00063     test_bit8();
00064     //test_bit16();
00065     //test_std8();
00066 }
00067 
00068