Diff: main.cpp

Revision:

1:c5f7996b1035

Parent:

0:f84245f91a5a

--- a/main.cpp	Fri May 14 21:19:39 2010 +0000
+++ b/main.cpp	Thu Aug 06 20:32:47 2020 +0000
@@ -1,48 +1,59 @@
-// test for 20X4 LCD displaying RAM address by locate()
-//   ym1784 2010/05/14
-//
-// e.g.
-//     01234567890123456789
-//    +--------------------+
-//   0|80    TextLCD     93|(0,0) .. (19,0)
-//   1|C0                D3|(0,1) .. (19,1)
-//   2|94      20X4      A7|(0,2) .. (19,2)
-//   3|D4                E7|(0,3) .. (19,3)
-//    +--------------------+
+#include "mbed.h"
+#include "SPI.h"
+Serial pc (USBTX, USBRX); 
+SPI spi_temp(PB_15, PB_14, PB_13); // mosi, miso, sclk
+DigitalOut spi_cs(PB_12); // chip select
 
-#include "mbed.h"
-#include "TextLCD_20X4.h"
-
-TextLCD_20X4 lcd(p21, p22, p26, p25, p24, p23); // rs, e, d0, d1, d2, d3
-
-int main() {
-    lcd.locate(0,0);
-    lcd.printf("80");
-
-    lcd.locate(18,0);
-    lcd.printf("93");
+void temp_read ()
+{
+    spi_cs=0;
+    wait(1);
+    float data0[9], data1[9];
+    float temp[9];
+    spi_temp.write(0xA0);            // Sensor Temperature
+    wait_us(200);
+    data0[0] = spi_temp.write(0xFF); // Higher Byte
+//    if (data0[0] < 128)             // Inside temp range
+        wait_us(200);
+        data1[0] = spi_temp.write(0xFF);     // Lower Byte 
+        temp[0] = (256*data0[0] + data1[0]) / 10;    
+         
+//    else                            // Overshooting temp range
+//        data1[0] = 0;
+//        temp[0] = 85.0;   }       
+    printf("Sensor %0.2f\n",temp[0]);    // Maximum Limit reached
+    wait_us(200);
+    for (int i = 1; i<=8; i++)      // For rest 8-pixels
+    {
+        uint8_t p = 0xA0 + i ;
 
-    lcd.locate(0,1);
-    lcd.printf("C0");
-
-    lcd.locate(18,1);
-    lcd.printf("D3");
-
-    lcd.locate(0,2);
-    lcd.printf("94");
-
-    lcd.locate(18,2);
-    lcd.printf("A7");
+        spi_temp.write(p);              // Deciding from 1st - 8th pixel
+        wait_us(200);
+        data0[i] = spi_temp.write(0xFF); // Higher Byte
+        
+//        if (data0[i] < 128)             // Inside temp range
+//        {
+            wait_us(200);
+            data1[i] = spi_temp.write(0xFF);     // Lower Byte 
+            temp[i] = (256*data0[i] + data1[i]) / 10;
+//        }
+//        else                            // Overshooting temp. range
+//        {   data1[i] = 0;
+//            temp[i] = 120.0;  }       
+        printf("Pixel %d %0.2f\n",i,temp[i]);    // Maximum limit reached
+    }
+    spi_cs=1;      
+}   
 
-    lcd.locate(0,3);
-    lcd.printf("D4");
-
-    lcd.locate(18,3);
-    lcd.printf("E7");
+void spi_initialise()
+{   spi_temp.format(8, 1);          //8-bits, Mode 1
+    spi_temp.frequency(100000);     // 100 KHz frequency of SCLK
+    spi_cs=1;
+}
 
-    lcd.locate(6,0);
-    lcd.printf("TextLCD");
-
-    lcd.locate(8,2);
-    lcd.printf("20X4");
-}
+int main()
+{
+    printf("Temp Check\n");
+    spi_initialise();
+    temp_read();
+}
\ No newline at end of file