added doc/makefile and images of heartbeat_gen

doc/datasheet.yaml

+---
+title: Heartbeat Generator
+subtitle: Datasheet
+author: J Färber
+date: April 2021
+lang: en-UK
+geometry: a4paper, left=25mm, right=20mm, top=20mm, bottom=25mm
+fontsize: 12pt
+code-block-font-size: \scriptsize
+titlepage: true
+logo: images/uasa-logo.pdf
+#toc: true
+#lof: true
+#lot: true
+#toc-own-page: true
+colorlinks: true
+secnumdepth: 4
+header-includes: 
+# 4th level header rendering
+# see https://stackoverflow.com/questions/21198025/pandoc-generation-of-pdf-from-markdown-4th-header-is-rendered-differently/21204829#21204829
+ - |
+   ``` {=latex}
+   \let\originAlParaGraph\paragraph
+   \renewcommand{\paragraph}[1]{\originAlParaGraph{#1} \hfill}
+   ```
+---

doc/heartbeat_generator_datasheet.md

+Introduction
+============
+
+A heartbeat generator can be used in a digital system to ...
+
+Features
+========
+
+Normal rhythm produces four entities – a P wave, a QRS complex, a T wave, and a U wave – that each
+have a fairly unique pattern. [[1]](https://en.wikipedia.org/wiki/Electrocardiography)
+
+For simplicity the existing heartbeat module generates the QRS complex and T wave only. 
+
+  * Models QRS-Complex and T-Wave
+  * Average time values based on 72 bpm
+  * Enable input for external prescaler
+
+
+General Description
+===================
+
+![Heartbeat Generator - Schematic Symbol](images/heartbeat_gen.png){width=40%}
+
+| **Name**    | **Type**          | **Direction** | **Polarity** | **Description** |
+|-------------|-------------------|:-------------:|:------------:|-----------------|
+| clk_i       | std_ulogic        | IN            | HIGH         | clock           |
+
+: Heartbeat Generator - Description of I/O Signals
+
+
+Functional Description
+======================
+
+The shape of an [electrogardiogramm](https://en.wikipedia.org/wiki/Electrocardiography) as a voltage graph over time
+
+
+
+![Electrocardiogram](images/ECG-SinusRhythmLabel.png){width=20%}
+
+The important QRS complex and T wave are modelled as digital pulses.
+
+![QRS Complex and T Wave Pulses](images/qrs-complex-t-wave-pulses.pdf){width=80%}
+
+
+Design Description
+==================
+
+A conceptional RTL diagram is shown below.
+
+![Heartbeat Generator - Conceptional RTL](images/heartbeat_gen_conceptional_rtl.pdf){width=60%}
+
+The simulation result shows two full periods based on a clock period of 1 ms
+
+![Two Periods - Simulation Result](images/heartbeat_gen_two_periods_simwave.png){width=80%}
+
+In more detail using cursors to display correct parameters of the QRS complex and T wave.
+
+![QRS-Complex and T-Wave - Simulation Result](images/qrs-complex-t-wave_simwave.png){width=80%}
+
+
+
+Device Utilization and Performance
+==================================
+
+The following table shows the utilisation of both modules heartbeat_gen and cntdnmodm.
+
+The following results  are extracted from
+
+  ```pure
+  pnr/de1_heartbeat_gen/de1_heartbeat_gen.fit.rpt
+  ```
+
+
+```pure
++--------------------------------------------------------------------------------------+
+; Fitter Summary                                                                       ;
++------------------------------------+-------------------------------------------------+
+```
+
+The following results  are extracted from
+
+  ```pure
+de1_heartbeat_gen.sta.rpt
+```
+
+```pure
++----------------------------------------------------------------------------------------+
+; TimeQuest Timing Analyzer Summary                                                      ;
++--------------------+-------------------------------------------------------------------+
+
+-----------------------------------------+
+; Clocks                                 ; 
++------------+------+--------+-----------+
+
+
++-----------------------------------------------------------------------------+
+; Multicorner Timing Analysis Summary                                         ;
++------------------+-------+-------+----------+---------+---------------------+
+
+```
+
+Application Note
+================
+
+The following test environment on a DE1 prototype board uses a system clock frequency of 50 MHz.
+A prescaler is parameterised to generate an output signal with a period of 1 ms.
+
+![Test Environment on DE1 Prototype Board](images/de1_heartbeat_gen_schematic.pdf){width=70%}
+
+
+
+Appendix
+========
+
+References
+----------
+
+* [Wiki: Electrocardiography](https://en.wikipedia.org/wiki/Electrocardiography)
+
+Project Hierarchy
+-----------------
+
+### Module Hierarchy for Verification
+
+```pure
+t_heartbeat_gen(tbench)
+  heartbeat_gen(rtl)
+```
+
+### Prototype Environment
+
+```pure
+de1_heartbeat_gen(structure)
+  heartbeat_gen(rtl)
+  cntdnmodm(rtl)
+```
+
+VHDL Sources
+------------
+
+```vhdl
+LIBRARY IEEE;
+USE IEEE.std_logic_1164.ALL;
+
+ENTITY heartbeat_gen IS
+  PORT (clk_i   : IN  std_ulogic;
+        rst_ni  : IN  std_ulogic;
+        en_pi   : IN  std_ulogic;
+        count_o : OUT std_ulogic_vector;
+        heartbeat_o : OUT std_ulogic
+        );
+END heartbeat_gen;
+```
+
+```vhdl
+LIBRARY IEEE;
+USE IEEE.std_logic_1164.ALL;
+USE IEEE.numeric_std.ALL;
+
+ARCHITECTURE rtl OF heartbeat_gen IS
+
+  CONSTANT n    : natural                := 10;
+  CONSTANT zero : unsigned(n-1 DOWNTO 0) := (OTHERS => '0');
+
+  CONSTANT heartbeat_period : unsigned(n-1 DOWNTO 0) := to_unsigned(833, n);
+  CONSTANT qrs_width        : unsigned(n-1 DOWNTO 0) := to_unsigned(100, n);
+  CONSTANT st_width
+  CONSTANT t_width
+  CONSTANT qt_width
+
+  SIGNAL next_state, current_state : unsigned(n-1 DOWNTO 0);
+
+  SIGNAL tc_qrs                    : std_ulogic;  -- qrs interval
+  SIGNAL tc_t                      : std_ulogic;  -- T wave
+
+BEGIN
+
+  next_state_logic : 
+                     
+
+
+  state_register : 
+                   
+
+  -- output_logic
+  t_wave : tc_t <= 
+                   
+                   
+                   
+  qrs_complex : tc_qrs <= 
+                          
+
+  output_value : heartbeat_o <= 
+
+
+END rtl;
+```
+
+Revision History
+----------------
+
+| **Date**  | **Version**  | **Change Summary**  |
+|:----------|:-------------|:--------------------|
+| May 2020  | 0.1  | Initial Release  |
+| April 2021  | 0.2  | Added parameterisation  |
+

doc/heartbeat_generator_presentation.md

+---
+title: Heartbeat Generator
+subtitle: VLSI-Design Module - Presentation
+author: J Färber
+date: SS2021
+---
+
+Overview
+========
+
+* Features
+* Interface Signals
+* Block Diagram
+* Functional Description
+* Simulation Result
+* Device Utilization and Performance
+* Demonstration
+* Questions
+
+Features
+========
+
+  * Models QRS-Complex and T-Wave
+  * Average time values based on 72 bpm
+  * Enable input for external prescaler
+
+Interface Signals
+=================
+
+![Heartbeat Generator - Schematic Symbol](images/heartbeat_gen_symbol.pdf){width=40%}
+
+
+Functional Description
+======================
+
+Simplification to Digital Pulses
+---------
+
+![Electrocardiogram](images/ECG-SinusRhythmLabel.png){width=20%}
+
+
+![QRS Complex and T Wave Pulses](images/qrs-complex-t-wave-pulses.pdf){width=80%}
+
+
+Functional Description
+======================
+
+Conceptional RTL Diagram
+---------------
+
+![Heartbeat Generator - Conceptional RTL](images/heartbeat_gen_conceptional_rtl.pdf){width=60%}
+
+Simulation Result - Top Level
+=============================
+
+![Two Periods - Simulation Result](images/heartbeat_gen_two_periods_simwave.png){width=80%}
+
+Device Utilization and Performance
+==================================
+
+```pure
++------------------------------------------------------------------------------+
+; Fitter Summary                                                               ;
++------------------------------------+-----------------------------------------+
+; Fitter Status                      ; Successful - Wed Mar 31 11:50:15 2021   ;
+; Quartus II 32-bit Version          ; 13.0.1 Build 232 06/12/2013 SP 1 SJ Web ;
+; Revision Name                      ; de1_heartbeat_gen                       ;
+; Top-level Entity Name              ; de1_heartbeat_gen                       ;
+; Family                             ; Cyclone II                              ;
+; Device                             ; EP2C20F484C7                            ;
+; Timing Models                      ; Final                                   ;
+; Total logic elements               ; 50 / 18,752 ( < 1 % )                   ;
+;     Total combinational functions  ; 50 / 18,752 ( < 1 % )                   ;
+;     Dedicated logic registers      ; 26 / 18,752 ( < 1 % )                   ;
+; Total registers                    ; 26                                      ;
+; Total pins                         ; 15 / 315 ( 5 % )                        ;
+; Total virtual pins                 ; 0                                       ;
+; Total memory bits                  ; 0 / 239,616 ( 0 % )                     ;
+; Embedded Multiplier 9-bit elements ; 0 / 52 ( 0 % )                          ;
+; Total PLLs                         ; 0 / 4 ( 0 % )                           ;
++------------------------------------+-----------------------------------------+
+```
+
+Demonstration
+=============
+
+Prototype Setup
+---------------
+
+![Test Environment on DE1 Prototype Board](images/de1_heartbeat_gen_schematic.pdf){width=70%}
+
+Demonstration
+=============
+
+Test Environment
+----------------
+
+
+
+
+
+Questions
+=========
+
+Thank you for your attention !
+

doc/heartbeat_generator_report.md

+Introduction
+============
+
+A heartbeat generator can be used in a digital system to display activity of a system.
+Based on population studies, a heartrate between 60 and 100 beats per minute (bpm)
+is considered as normal for a human adult.
+
+Features
+========
+
+Normal rhythm produces four entities – a P wave, a QRS complex, a T wave, and a U wave – that each
+have a fairly unique pattern. [[1]](https://en.wikipedia.org/wiki/Electrocardiography)
+
+For simplicity the existing heartbeat modules generates the QRS complex and T wave only. 
+
+  * Models QRS-Complex and T-Wave
+  * Average time values based on 72 bpm
+  * Enable input for external prescaler
+
+
+General Description
+===================
+
+![Heartbeat Generator - Schematic Symbol](images/heartbeat_gen_symbol.pdf){width=40%}
+
+| **Name**    | **Type**          | **Direction** | **Polarity** | **Description** |
+|-------------|-------------------|:-------------:|:------------:|-----------------|
+| clk_i       | std_ulogic        | IN            | HIGH         | clock           |
+| rst_ni      | std_ulogic        | IN            | LOW          | reset           |
+| en_pi       | std_ulogic        | IN            | HIGH         | enable          |
+| count_o     | std_ulogic_vector | OUT           | HIGH         | count value     |
+| heartbeat_o | std_ulogic        | OUT           | HIGH         | hearbeat pulse output |
+
+: Heartbeat Generator - Description of I/O Signals
+
+
+Functional Description
+======================
+
+The shape of an [electrogardiogramm](https://en.wikipedia.org/wiki/Electrocardiography) as a voltage graph over time
+
+
+
+![Electrocardiogram](images/ECG-SinusRhythmLabel.png){width=20%}
+
+The important QRS complex and T wave are modelled as digital pulses.
+
+![QRS Complex and T Wave Pulses](images/qrs-complex-t-wave-pulses.pdf){width=80%}
+
+
+Design Description
+==================
+
+A conceptional RTL diagram is shown below.
+
+![Heartbeat Generator - Conceptional RTL](images/heartbeat_gen_conceptional_rtl.pdf){width=60%}
+
+The simulation result shows two full periods based on a clock period of 1 ms
+
+![Two Periods - Simulation Result](images/heartbeat_gen_two_periods_simwave.png){width=80%}
+
+In more detail using cursors to display correct parameters of the QRS complex and T wave.
+
+![QRS-Complex and T-Wave - Simulation Result](images/qrs-complex-t-wave_simwave.png){width=80%}
+
+
+
+Device Utilization and Performance
+==================================
+
+The following table shows the utilisation of both modules heartbeat_gen and cntdnmodm.
+
+```pure
++--------------------------------------------------------------------------------------+
+; Fitter Summary                                                                       ;
++------------------------------------+-------------------------------------------------+
+; Fitter Status                      ; Successful - Wed Mar 31 11:50:15 2021           ;
+; Quartus II 32-bit Version          ; 13.0.1 Build 232 06/12/2013 SP 1 SJ Web Edition ;
+; Revision Name                      ; de1_heartbeat_gen                               ;
+; Top-level Entity Name              ; de1_heartbeat_gen                               ;
+; Family                             ; Cyclone II                                      ;
+; Device                             ; EP2C20F484C7                                    ;
+; Timing Models                      ; Final                                           ;
+; Total logic elements               ; 50 / 18,752 ( < 1 % )                           ;
+;     Total combinational functions  ; 50 / 18,752 ( < 1 % )                           ;
+;     Dedicated logic registers      ; 26 / 18,752 ( < 1 % )                           ;
+; Total registers                    ; 26                                              ;
+; Total pins                         ; 15 / 315 ( 5 % )                                ;
+; Total virtual pins                 ; 0                                               ;
+; Total memory bits                  ; 0 / 239,616 ( 0 % )                             ;
+; Embedded Multiplier 9-bit elements ; 0 / 52 ( 0 % )                                  ;
+; Total PLLs                         ; 0 / 4 ( 0 % )                                   ;
++------------------------------------+-------------------------------------------------+
+```
+
+```pure
+
++----------------------------------------------------------------------------------------+
+; TimeQuest Timing Analyzer Summary                                                      ;
++--------------------+-------------------------------------------------------------------+
+; Quartus II Version ; Version 13.0.1 Build 232 06/12/2013 Service Pack 1 SJ Web Edition ;
+; Revision Name      ; de1_heartbeat_gen                                                 ;
+; Device Family      ; Cyclone II                                                        ;
+; Device Name        ; EP2C20F484C7                                                      ;
+; Timing Models      ; Final                                                             ;
+; Delay Model        ; Combined                                                          ;
+; Rise/Fall Delays   ; Unavailable                                                       ;
++--------------------+-------------------------------------------------------------------+
+
+-----------------------------------------+
+; Clocks                                 ; 
++------------+------+--------+-----------+
+; Clock Name ; Type ; Period ; Frequency ;
++------------+------+--------+-----------+
+; CLOCK_50	 ; Base ; 20.000 ; 50.0 MHz	 ;
++------------+------+--------+-----------+
+
+
++-----------------------------------------------------------------------------+
+; Multicorner Timing Analysis Summary                                         ;
++------------------+-------+-------+----------+---------+---------------------+
+; Clock            ; Setup ; Hold  ; Recovery ; Removal ; Minimum Pulse Width ;
++------------------+-------+-------+----------+---------+---------------------+
+; Worst-case Slack ; 3.390 ; 0.241 ; 13.381   ; 3.796   ; 8.889               ;
+;  CLOCK_50        ; 3.390 ; 0.241 ; 13.381   ; 3.796   ; 8.889               ;
+; Design-wide TNS  ; 0.0   ; 0.0   ; 0.0      ; 0.0     ; 0.0                 ;
+;  CLOCK_50        ; 0.000 ; 0.000 ; 0.000    ; 0.000   ; 0.000               ;
++------------------+-------+-------+----------+---------+---------------------+
+```
+
+Application Note
+================
+
+The following test environment on a DE1 prototype board uses a system clock frequency of 50 MHz.
+A prescaler is parameterised to generate an output signal with a period of 1 ms.
+
+![Test Environment on DE1 Prototype Board](images/de1_heartbeat_gen_schematic.pdf){width=70%}
+
+
+
+Appendix
+========
+
+References
+----------
+
+* [Wiki: Electrocardiography](https://en.wikipedia.org/wiki/Electrocardiography)
+
+Project Hierarchy
+-----------------
+
+### Module Hierarchy for Verification
+
+```pure
+t_heartbeat_gen(tbench)
+  heartbeat_gen(rtl)
+```
+
+### Prototype Environment
+
+```pure
+de1_heartbeat_gen(structure)
+  heartbeat_gen(rtl)
+  cntdnmodm(rtl)
+```
+
+VHDL Sources
+------------
+
+```vhdl
+LIBRARY IEEE;
+USE IEEE.std_logic_1164.ALL;
+
+ENTITY heartbeat_gen IS
+  PORT (clk_i   : IN  std_ulogic;
+        rst_ni  : IN  std_ulogic;
+        en_pi   : IN  std_ulogic;
+        count_o : OUT std_ulogic_vector;
+        heartbeat_o : OUT std_ulogic
+        );
+END heartbeat_gen;
+```
+
+```vhdl
+LIBRARY IEEE;
+USE IEEE.std_logic_1164.ALL;
+USE IEEE.numeric_std.ALL;
+
+ARCHITECTURE rtl OF heartbeat_gen IS
+
+  CONSTANT n    : natural                := 10;
+  CONSTANT zero : unsigned(n-1 DOWNTO 0) := (OTHERS => '0');
+
+  CONSTANT heartbeat_period : unsigned(n-1 DOWNTO 0) := to_unsigned(833, n);
+  CONSTANT qrs_width        : unsigned(n-1 DOWNTO 0) := to_unsigned(100, n);
+  CONSTANT st_width
+  CONSTANT t_width
+  CONSTANT qt_width
+
+  SIGNAL next_state, current_state : unsigned(n-1 DOWNTO 0);
+
+  SIGNAL tc_qrs                    : std_ulogic;  -- qrs interval
+  SIGNAL tc_t                      : std_ulogic;  -- T wave
+
+BEGIN
+
+  next_state_logic : 
+                     
+
+
+  state_register : 
+                   
+
+  -- output_logic
+  t_wave : tc_t <= 
+                   
+                   
+                   
+  qrs_complex : tc_qrs <= 
+                          
+
+  output_value : heartbeat_o <= 
+
+
+END rtl;
+```
+
+Revision History
+----------------
+
+| **Date**  | **Version**  | **Change Summary**  |
+|:----------|:-------------|:--------------------|
+| May 2020  | 0.1  | Initial Release  |
+| April 2021  | 0.2  | Added parameterisation  |
+

doc/makefile

+## ----------------------------------------------------------------------------
+## Script     : makefile
+## ----------------------------------------------------------------------------
+## Author     : Johann Faerber
+## Company    : University of Applied Sciences Augsburg
+## ----------------------------------------------------------------------------
+## Description: This makefile allows automating documentation process
+##              based on markdown and pandoc 
+##              
+## ----------------------------------------------------------------------------
+
+###################################################################
+# Definitions
+#
+###################################################################
+PROJECT = heartbeat_generator
+
+DATASHEET_YAML = datasheet.yaml
+REPORT_YAML = report.yaml
+PRESENTATION_YAML = presentation.yaml
+
+###################################################################
+# Main Targets
+#
+###################################################################
+
+help:
+	@echo '"make" does intentionally nothing. Type:'
+	@echo '  "make datasheet" to create a datasheet'
+	@echo '  "make report" to create a report'
+	@echo '  "make presentation" to create a presentation'
+	@echo '  "make clean" to remove all generated files'
+
+
+datasheet: $(PROJECT)_datasheet.md
+	pandoc --template uasa_meng_vlsi_template.tex $(DATASHEET_YAML) $(PROJECT)_datasheet.md -o $(PROJECT)_datasheet.pdf   --highlight-style tango
+
+
+report: $(PROJECT)_report.md
+	pandoc --template uasa_meng_vlsi_template.tex $(REPORT_YAML) $(PROJECT)_report.md -o $(PROJECT)_report.pdf   --highlight-style tango --number-sections
+
+
+presentation: $(PROJECT)_presentation.md
+	pando