Diff: main.cpp

Revision:

0:1eda7e4ab843

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Feb 07 03:55:44 2010 +0000
@@ -0,0 +1,90 @@
+#include "mbed.h"
+
+SPI spi(p5,p6,p7);
+DigitalOut cs(p8);
+InterruptIn Max3140Data(p9);
+
+Serial pc(USBTX, USBRX);
+
+int ret = 0;
+char input_character = 0;
+char output_character = 0;
+char input_buffer[16384];
+int input_buffer_pointer = 0;
+int output_buffer_pointer = 0;
+
+void gotit() {
+
+   cs = 0;  
+   ret = 0;
+   ret = spi.write(0x0000);
+   cs = 1;
+   input_character = char(ret & 0x7F);
+   input_buffer[input_buffer_pointer++] = input_character;
+   //pc.printf("%c",input_character);
+}
+
+void Max3140_Write(char output_byte){
+    ret = 0;
+    cs = 0;
+    ret = spi.write(0x8000 | output_byte);
+    cs = 1;
+    wait(0.0001);
+    }
+    
+
+int main(){ 
+
+    spi.format(16,0);
+    spi.frequency(1000000);
+
+    Max3140Data.mode(PullUp);    
+    Max3140Data.fall(&gotit);
+
+    wait(0.5);
+    
+    Max3140_Write('H');
+    Max3140_Write('e');
+    Max3140_Write('l');
+    Max3140_Write('l');
+    Max3140_Write('o');
+    Max3140_Write('\r');
+    Max3140_Write('\n');    
+    
+    ret = 0;
+    cs = 0;
+    ret = spi.write(0xC400);
+    cs = 1;
+    wait(0.1);
+    //pc.printf("\r\nWRITE CONFIGURATION register = 0x%04X\r\n ", ret);
+
+    cs = 0;
+    ret = spi.write(0x4000);
+    cs = 1;
+    //pc.printf("\r\nREAD CONFIGURATION register = 0x%04X\r\n", ret);
+    wait(0.1);
+
+    // Try to read some data
+
+    ret = 0;
+    cs = 0;
+    ret = spi.write(0x8600);
+    cs = 1;
+    
+    wait(0.1);
+    
+     //cs = 0;
+    //ret = spi.write(0x0000);
+    // cs = 1;
+    
+    pc.printf("at loop\r\n");
+    input_buffer_pointer = output_buffer_pointer = 0; 
+    for(;;){       
+        if(input_buffer_pointer > output_buffer_pointer){
+            //pc.printf("%d %d\r\n", input_buffer_pointer, output_buffer_pointer);
+            output_character = input_buffer[output_buffer_pointer++];
+            pc.printf("%c", output_character);
+        }
+    }
+ 
+}
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