Matt Godfrey mcgodfrey

## homebrew_temperature_logger_log_file.c
/*
 * Logs current temperature data to SD card.
 * Note that the global variable "filename" must be initialised
 * File format is:
 * datestring,sensor0_name,temp0,sensor1_name,temp1,sensor2_name,temp2
 * datestring,sensor0_name,temp0,sensor1_name,temp1,sensor2_name,temp2
 */
byte log_temps(char *date_str){
  File f = SD.open(filename, FILE_WRITE);
  if(f) {

## homebrew_temperature_logger_temperature.c
void measure_temps(){
  DateTime t = rtc.now();      //get the current timestamp
  datetime2str(t, date_str);

  //trigger a temperature measurement
  sensors.begin();
  sensors.setWaitForConversion(false);
  sensors.requestTemperatures();
  conversionTimer.restart();  //Set up timer for temperature conversion to complete
  return;

## homebrew_temperature_logger_buttons.c
void loop() {
  //...
  //poll the buttons
  button_up.poll();
  button_down.poll();
  button_select.poll();

## homebrew_temperature_logger_timers.c
void loop() {
  //poll the timers
  //if any of these have expired then their callback will automatically run.
  conversionTimer.run();
  measTimer.run();
  display_timeout.run();
  //...
  //reset the display timeout timer if a button was pressed
  if(button_up.pushed() || button_down.pushed() || button_select.pushed()){
    display_timeout.restart();

## mojo_top_servo_demo.v
/*
  Servo motor control demo module
  Four servos swing back and forth with different speeds.
*/
module mojo_top(
  input clk, // 50MHz clock input
  //remaining default inputs/outputs omitted
  output [3:0] servo_out //PWM output lines for each servo
  );
  //Usual setup code omitted (setting SPI lines, reset, etc.

## servo_controller.v
/*
  servo controller
  Based on code from Mojo tutorial
  https://embeddedmicro.com/tutorials/mojo/servos

  Takes an 8-bit position as an input
  Output a single pwm signal with period of ~20ms
   Pulse width = 1ms -> 2ms full scale. 1.5ms is center position
*/
module servo_controller (

## counter.v
/*
  8 bit up-down counter.
  Based on code from Mojo tutorial
  https://embeddedmicro.com/tutorials/mojo/pulse-width-modulation
     /\    /\
    /  \  /  \
   /    \/    \
  The CRT_LEN determines the period of the resulting counter
*/
module counter #(parameter CTR_LEN = 27) (

## power_supply.c
/*
 * Voltage and current monitor for lab supply
 *
 * LCD and analog input pin assignments as shown below
 *
 * Matt Godfrey, 2015
*/

#include <LiquidCrystal.h>
	/*
	* Logs current temperature data to SD card.
	* Note that the global variable "filename" must be initialised
	* File format is:
	* datestring,sensor0_name,temp0,sensor1_name,temp1,sensor2_name,temp2
	* datestring,sensor0_name,temp0,sensor1_name,temp1,sensor2_name,temp2
	*/
	byte log_temps(char *date_str){
	File f = SD.open(filename, FILE_WRITE);
	if(f) {
	void measure_temps(){
	DateTime t = rtc.now(); //get the current timestamp
	datetime2str(t, date_str);

	//trigger a temperature measurement
	sensors.begin();
	sensors.setWaitForConversion(false);
	sensors.requestTemperatures();
	conversionTimer.restart(); //Set up timer for temperature conversion to complete
	return;
	void loop() {
	//...
	//poll the buttons
	button_up.poll();
	button_down.poll();
	button_select.poll();
	void loop() {
	//poll the timers
	//if any of these have expired then their callback will automatically run.
	conversionTimer.run();
	measTimer.run();
	display_timeout.run();
	//...
	//reset the display timeout timer if a button was pressed
	if(button_up.pushed() \|\| button_down.pushed() \|\| button_select.pushed()){
	display_timeout.restart();
	/*
	Servo motor control demo module
	Four servos swing back and forth with different speeds.
	*/
	module mojo_top(
	input clk, // 50MHz clock input
	//remaining default inputs/outputs omitted
	output [3:0] servo_out //PWM output lines for each servo
	);
	//Usual setup code omitted (setting SPI lines, reset, etc.
	/*
	servo controller
	Based on code from Mojo tutorial
	https://embeddedmicro.com/tutorials/mojo/servos

	Takes an 8-bit position as an input
	Output a single pwm signal with period of ~20ms
	Pulse width = 1ms -> 2ms full scale. 1.5ms is center position
	*/
	module servo_controller (
	/*
	8 bit up-down counter.
	Based on code from Mojo tutorial
	https://embeddedmicro.com/tutorials/mojo/pulse-width-modulation
	/\ /\
	/ \ / \
	/ \/ \
	The CRT_LEN determines the period of the resulting counter
	*/
	module counter #(parameter CTR_LEN = 27) (
	/*
	* Voltage and current monitor for lab supply
	*
	* LCD and analog input pin assignments as shown below
	*
	* Matt Godfrey, 2015
	*/

	#include <LiquidCrystal.h>