Delong Qi
/
LinkNode_LIS3DH
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Revision 11:c16a53584668, committed 2016-04-13
- Comitter:
- helloqi
- Date:
- Wed Apr 13 12:34:56 2016 +0000
- Parent:
- 10:3e42ca878d11
- Commit message:
- LinkNode_LIS3DH
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
diff -r 3e42ca878d11 -r c16a53584668 main.cpp
--- a/main.cpp Sun Jan 17 03:25:27 2016 +0000
+++ b/main.cpp Wed Apr 13 12:34:56 2016 +0000
@@ -1,12 +1,86 @@
-#include "mbed.h"
+#include<mbed.h>
+
+uint16_t x_a,y_a,z_a;
+bool flag = 0;
+
+SPI spi_master(P0_6,P0_5,P0_7); //mosi miso sclk
+DigitalOut cs(P0_4);
+
+//Serial pc(P0_23,P0_25);
+
+Serial pc(P0_9,P0_11);
-DigitalOut myled(LED1);
+uint8_t LIS3DH_SPI_RD(uint8_t addr)
+{
+ uint8_t temp;
+ cs = 0;
+ wait_us(10);
+ spi_master.write(addr);
+ temp=spi_master.write(0xff);
+ wait_us(10);
+ cs = 1;
+ return temp;
+}
+
+void LIS3DH_SPI_WR(uint8_t addr,uint8_t wrdata)
+{
+ cs = 0;
+ wait_us(10);
+ spi_master.write(addr);
+ spi_master.write(wrdata);
+ wait_us(10);
+ cs = 1;
+}
-int main() {
- while(1) {
- myled = 1;
- wait(0.2);
- myled = 0;
- wait(0.2);
+void SPI_LIS3DH_Init()
+{
+ spi_master.format(8,3);
+ spi_master.frequency(100000);
+ wait_ms(5);
+ LIS3DH_SPI_WR(0x24,0x80);
+ wait_ms(5);
+ LIS3DH_SPI_WR(0x20,0x17);
+ LIS3DH_SPI_WR(0x23,0x80);
+}
+
+void get_val(void)
+{
+ uint8_t Dx_L=1,Dy_L=1,Dz_L=1;
+ uint8_t Dx_H=1,Dy_H=1,Dz_H=1;
+ if(LIS3DH_SPI_RD(0x0f|0x80)==0x33)
+ {
+ printf("check device ok!\r\n");
+ flag=1;
+ Dx_H=LIS3DH_SPI_RD(0x29|0x80);
+ Dx_L=LIS3DH_SPI_RD(0x28|0x80);
+ Dy_H=LIS3DH_SPI_RD(0x2b|0x80);
+ Dy_L=LIS3DH_SPI_RD(0x2A|0x80);
+ Dz_H=LIS3DH_SPI_RD(0x2d|0x80);
+ Dz_L=LIS3DH_SPI_RD(0x2C|0x80);
}
+ else
+ {
+ printf("check device err!\r\n");
+ wait(1);
+ }
+ x_a=Dx_H<<8|Dx_L/16;
+ y_a=Dy_H<<8|Dy_L/16;
+ z_a=Dz_H<<8|Dz_L/16;
}
+
+int main(void)
+{
+ SPI_LIS3DH_Init();
+ while(1)
+ {
+ get_val();
+ if(flag)
+ {
+ printf("Dx=:%d\r\n",x_a);
+ printf("Dy=:%d\r\n",y_a);
+ printf("Dz=:%d\r\n",z_a);
+ flag=0;
+ wait(1);
+ }
+ }
+}