TVZ2018
This code reads 5 analog inputs, converts them to string, then sends them over USART to PC. On PC LabVIEW app read and displays and logs values
Dependencies: mbed
This code reads analog inputs form A0 to A4, which then gets converted to string and sent over USART.
String are parsed in the following manner:
Start char: $ Delimiter char: # End char: ?
example: Reading A01=2.53V and A02=1.2V the resulted parsed string would be: $2.530#1.200#?
Revision 0:15f3699c39a5, committed 2019-03-29
- Comitter:
- ChrisLusetic
- Date:
- Fri Mar 29 15:49:15 2019 +0000
- Commit message:
- Initial and final commit;
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Mar 29 15:49:15 2019 +0000
@@ -0,0 +1,54 @@
+//TODO: dodati sd card logger
+//TODO: dodati conversion for sensors
+//TODO: Serial Read from LabView on start
+//TODO: PWM output
+
+#include "mbed.h"
+#include "stdio.h"
+#include "string"
+
+#define SAMPLE_RATE 0.01
+Serial pc(USBTX, USBRX); // tx, rx
+
+Timer timer;
+AnalogIn a_input[] = {A0,A1,A2,A3,A4};
+const int numberOfInputs=5;
+float analog_values[numberOfInputs];
+
+char buffer[100];
+char temp[30];
+void read_inputs();
+void convert_inputs();
+void send_results();
+
+void flushSerialBuffer(void) { char char1 = 0; while (pc.readable()) { char1 = pc.getc(); } return; }
+
+int main() {
+ timer.start();
+ flushSerialBuffer();
+ while(1){
+ if (timer.read() > SAMPLE_RATE) {
+ read_inputs();
+ convert_inputs();
+ send_results();
+ timer.reset();
+ }
+ }
+ }
+void read_inputs(){
+ for (int i=0;i<numberOfInputs;i++){
+ analog_values[i]= a_input[i].read()*3.3; //convert to voltage
+ }
+ }
+void convert_inputs(){
+ for (int i=0;i<numberOfInputs;i++){
+ sprintf(temp,"%.3f",analog_values[i]); //convert float to string
+ strcat(temp,"#"); //add delimiter
+ strcat(buffer,temp); //concatenate buffer and new value
+ }
+ strcat(buffer,"?"); //end char
+ }
+void send_results(){
+ pc.printf(buffer); //serial send buffer
+ sprintf(buffer,"$"); //start char
+ }
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Mar 29 15:49:15 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400 \ No newline at end of file