Diff: adc.cpp

Revision:

0:aaea4a22c294

Child:

1:c3989f45366c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/adc.cpp	Fri Feb 28 23:41:51 2020 +0000
@@ -0,0 +1,32 @@
+#include "mbed.h"
+
+SPI mySPI(D11, D12, A4); // mosi, miso, sclk
+DigitalOut cs(D10);
+Serial pc(USBTX, USBRX); // tx, rx
+float Vref = 3.3 ;
+
+int main(){ 
+            cs=1;
+            mySPI.format(8,0); //Setup the spi for 10 bit data, spi mode 0
+            mySPI.frequency(1000000); // second edge capture, with a 1MHz clock rate
+
+        while (1){
+            cs=0;
+            int highByte = mySPI.write(0b01101000); //Send the command to read the slave data
+            pc.printf("highByte: %d ",highByte);
+            cs=1;
+            cs=0;
+            int lowByte = mySPI.write(0xFF); // send dummy byte to receive the slave data
+            pc.printf("lowByte: %d ",lowByte);
+            cs=1;
+            cs=0;
+            int wasteByte = mySPI.write(0x00);
+            cs=1;
+
+            int dataCh0 =  ((highByte << 8) + lowByte)&0x03FF;
+            float volts = dataCh0*Vref /1024;
+            pc.printf("CH0 %f V\n",volts);
+            //cs=1;
+            wait(3);
+            }
+}
\ No newline at end of file