Revision 0:dc93cf7b2b42, committed 2010-08-01

Comitter:

matsukawa

Date:

Sun Aug 01 13:07:04 2010 +0000

Commit message:

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Aug 01 13:07:04 2010 +0000
@@ -0,0 +1,114 @@
+//---------------1-------------------------
+
+#include "mbed.h"
+#include "TextLCD.h"
+
+TextLCD lcd(p24, p25, p26, p27, p28, p29, p30); // rs, rw, e, d0, d1, d2, d3
+SPI spi(p5, p6, p7); // mosi, miso, sclk
+DigitalOut cs(p8);
+
+Serial pc(USBTX, USBRX); // tx, rx
+
+
+//-----------------2------------------------
+//Addresses
+#define REVID 0x00    //ASIC Revision Number
+#define OPSTATUS 0x04   //Operation Status
+#define STATUS 0x07     //ASIC Status
+#define START 0x0A      //Constant Readings
+#define PRESSURE 0x1F   //Pressure 3 MSB
+#define PRESSURE_LSB 0x20 //Pressure 16 LSB
+#define TEMP 0x21       //16 bit temp
+
+//---------------3-----------------------
+    
+float temp_in;
+unsigned long pressure_lsb;
+unsigned long pressure_msb;
+unsigned long temp_pressure;
+unsigned long pressure;
+
+char read_register(char register_name)
+{
+    register_name <<=2;
+    register_name &= 0xFC;
+    cs=0; //Select SPI device
+    spi.write(register_name); //Send register location
+    char register_value=spi.write(0x00);
+    cs=1;
+    return register_value;  
+}
+
+
+void write_register(char register_name, char register_value)
+{
+    register_name <<= 2;
+    register_name |= 0x02; //le estamos diciendo que escriba
+    cs=0; //Select SPI device
+    spi.write(register_name); //Send register location
+    spi.write(register_value); //Send value to record into register
+    cs=1;
+} 
+
+float read_register16(char register_name)
+{   
+    register_name <<= 2;
+    register_name &= 0xFC; //Read command
+    cs=0; //Select SPI Device
+    spi.write(register_name); //Write byte to device
+    int in_byte1 = spi.write(0x00);    
+    int in_byte2 = spi.write(0x00);
+    cs=1;
+    float in_word= (in_byte1<<=8) | (in_byte2);   
+    return(in_word);
+}
+
+
+//-----------------4------------------------
+
+int main() {
+// configuracion---------------------------------
+    cs=1;
+    spi.frequency(500000); // the fastest of the sensor
+    spi.format(8, 0); // duda son dos palabras de 8 bits? 
+    wait(0.5);
+//------------------------------------------------
+// pc.printf("RESET\r\n");
+write_register(0x06,0x01);
+wait(0.5);
+
+// pc.printf("Initialize High Resolution Constant Reading Mode\r\n");
+write_register(0x03,0x0A);
+wait(0.5);
+
+while (1) {  
+  pressure_msb = read_register(PRESSURE);
+  pressure_msb &= 0x07;
+  pressure_lsb = read_register16(PRESSURE_LSB);
+  pressure = ((pressure_msb<<16)| pressure_lsb);
+  pressure /= 4;
+  temp_in = read_register16(TEMP);
+  lcd.cls();
+  if (temp_in > 0x3FFF) {
+        temp_in = 0x3FFF - temp_in;
+        lcd.locate(0, 0);
+        lcd.printf("t:%.2f",temp_in);
+        temp_in = temp_in / 20;
+        lcd.locate(0, 1);
+        lcd.printf("Temp :-");
+        lcd.printf("%.1f",temp_in);
+  // pc.printf("TEMPERATURA: %.2f,PRESION:  %.2u\r",temp_in ,pressure);
+  } else {
+        lcd.locate(0, 0);
+        lcd.printf("t:%.2f",temp_in);
+        lcd.locate(0, 1);
+        temp_in = temp_in / 20;
+        lcd.printf("Temp :+");
+        lcd.printf("%.1f",temp_in);
+  // pc.printf("TEMPERATURA: %.2f,PRESION:  %.2u\r",temp_in ,pressure);
+  }
+  // temp_in = temp_in / 20;
+  wait(5);
+}
+
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Aug 01 13:07:04 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9114680c05da