charles young
Charles Young's development fork. Going forward I only want to push mature code to main repository.
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GEO_COUNTER_L432KC
by 
Geo Electronics "Geo Counter"
Diff: main.cpp
- Revision:
- 1:75827d765e34
- Parent:
- 0:6d1742703713
- Child:
- 2:ac0ed3d84d44
--- a/main.cpp Tue Feb 13 13:30:08 2018 +0000
+++ b/main.cpp Fri Feb 16 16:32:58 2018 +0000
@@ -1,42 +1,90 @@
-#include "mbed.h"
-#include <string>
-#include "max7219.h"
-#include "QEI.h"
+// GEO COUNTER V1 firmware
+//
+// Feb 14, 2018: initial release aimed to test the counters, the serial port
+// the PWM output and the MAX7219 operation.
+// Feb 15, 2018: Removed MAX7219 libray (replaced with custom routine).
+// Added 74HC595 routine. Added beep. Added Gate_write
+//
+//
+//
+
+// this block includes key libraries
+#include "mbed.h" // global Mbed library (always needed)
+#include <string> // strings management
+#include "QEI.h" // Quadrature Encoder functions
+
+// definitions of fixed parameters
-#define TGATE 1
-#define MAX_VAL 999999
+#define DEC_MODE 0x09FF // BCD decoding on all digits
+#define BRIGHTNESS 0x0A0F // max brightness
+#define SCAN_LIM 0x0B07 // use all 8 digits
+#define TURN_ON 0x0C01 // no shutdown (operating)
+#define SHUTDOWN 0x0C00 // shutdown
+#define TEST 0x0F00 // no test
+
+#define DT 1 // delay time in us for SPI emulation
+
+#define TGATE 10 // gate time (currently fixed for testing purpose)
+#define MAX_VAL 999999 // Max value managed by the 6-digits display
+
+#define CPM 0x01
+#define CPS 0x02
+#define PLS 0x04
+#define VOLTS 0x08
+#define CNT1 0x10
+#define CNT2 0x20
+#define HV 0x40
+#define MENU 0x80
+
+// definitions of the input/outputs (pins)
+DigitalOut AUX (D2); // AUX control for GPS module
InterruptIn TRIG1 (D3); // Counter 1 trigger
InterruptIn TRIG2 (D6); // Counter 2 trigger
+DigitalIn QEIPB (D9); // Quadrature encoder pushbutton
PwmOut PWM (D10); // PWM output
-DigitalOut BUZZ (D2); // Buzzer
-DigitalOut AUX (D2); // AUX control for GPS module
-DigitalIn QEIPB (D9); // Quadrature encoder pushbutton
+DigitalOut BUZZ (D13); // Buzzer
-QEI Wheel(D11, D12, NC, 16); // Quadrature encoder
-I2C i2c(D4, D5); // I2C port
-Ticker Sec_Beat;
-Max7219 Display(A6, A5, A4, A3); //LED diplay driver (MOSI, MISO, SCK, SS)
-Serial PC(USBTX, USBRX); // Virtual COM via USB
-Serial GPS(D1, D0);
+AnalogIn AIN0 (A0); // ADC input 0 (High Voltage)
+AnalogIn AIN1 (A1); // ADC input 1 (aux)
+DigitalOut CS2 (A2); // 74HC595 RCLK (pin 12)
+DigitalOut CS1 (A3); // MAX7219 CS (pin 12)
+DigitalOut SCK (A4); // 74HC595 SRCLK (pin 11) & MAX7219 SCK (pin 13)
+AnalogIn KEYB (A5); // Keyboard input (SW2 & SW3)
+DigitalOut MOSI (A6); // 74HC595 SER (pin 14) & MAX7219 DIN (pin 1)
+DigitalIn UN (A7); // Unused (in V1 PCB A5 and A7 must be connected)
+
+
+
+
+// definitions of peripherals and devices
+QEI Wheel(D12, D11, NC, 16); // Quadrature encoder
+I2C i2c(D4, D5); // I2C port
+Ticker Sec_Beat; // 1 second ticker
+Serial PC(USBTX, USBRX); // Virtual COM via USB (PC connection)
+Serial GPS(D1, D0); // Serial port for GPS module
// Global variables
-uint8_t Digit_Disp[8];
-uint16_t Stream;
-
-time_t seconds; // RTC timestamp
+uint8_t Disp_Digit[8]; // used to manage 8-digits through MAX7219
+uint16_t Stream; // used to stream out serial data to MAX7219
+time_t seconds; // Real-Time Clock (RTC) timestamp
+unsigned int value = 0; // displayed value on the 6-digits of the display
+uint8_t gate = TGATE; // displayed value on the 2-digits display
+uint32_t Count1, Count2; // pulse counters (32-bit)
+char Text[40]=""; // used to send messages over the serial port
+uint8_t Disp_mode = 0x01, Disp_unit = 0xA0; // status of 1st row and 2nd rows of LEDs
+bool Stopped = 1; // status of counting activity
+double ADC_val; // used to read ADC value
-unsigned int value = 0;
-uint32_t CNT1, CNT2; // pulse counters
-uint8_t gate;
-char Text[40]="";
-
-// ------------------- Prototypes -----------------------
-void RefreshDisplay(void);
-void Update(void);
-void CNT1_count(void);
-void CNT2_count(void);
-
+// ----- Prototypes of routines (defined below the main) -------------------
+void Update(void); // periodically called by the ticker
+void Count1_up(void); // called every time an edge is detected on TRIG1 pin
+void Count2_up(void); // called every time an edge is detected on TRIG2 pin
+void Beep(void); // used to generate a short beep (buzzer)
+void LEDs_write(unsigned short); // write to 74HC595 (8x LEDs)
+void Display_init(void); // initialize MAX7219
+void Display_6D_write(uint8_t); // write to MAX7219 (Main 6-digits display)
+void Display_2D_write(unsigned short); // write to MAX7219 (Gate 2-digits display)
//==============================================================================
//==============================================================================
@@ -44,149 +92,340 @@
int main()
{
- PC.baud(115200);
- PC.printf("Connected...\n");
- GPS.baud(9600);
+ PC.baud(115200); // set baud-rate of virtual COM port (PC connection)
+ PC.printf("GEO COUNTER V1 2108\n");
+ PC.printf(__DATE__);
+ PC.printf(" ");
+ PC.printf(__TIME__);
+ PC.printf("\nReady...\n");
+
+ GPS.baud(9600); // set tyhe baud-rate of the serial port dedicated to the GPS
- max7219_configuration_t cfg = {
- .device_number = 1,
- .decode_mode = 0xFF,
- .intensity = Max7219::MAX7219_INTENSITY_F, // max brightness
- .scan_limit = Max7219::MAX7219_SCAN_6 // 6 digits
- };
+ CS1 = 1; // presets CS of MAX7219
+ CS2 = 1; // preset CS of 74HC595
+
+ Display_6D_write(0);
+ Display_2D_write(TGATE);
+ Display_init(); // initialize MAX7219
- Display.init_device(cfg);
- Display.enable_device(1);
- Display.device_all_on(1);
-
- set_time(1256729737); // Set time to Wed, 28 Oct 2009 11:35:37
+ // RTC is supposed to be loose time at power down (no backup battery)
+ // An initialization is performed anyway
+ set_time(0); // Set time
+ Wheel.reset(); // clear the variable associated to the encoder
+
+ PWM.period_ms(3); // set the PWM period
+ PWM.write(0.8); // set the PWM duty-cycle
+
+ LEDs_write(0x00); // initialize LEDs (CPM and CNT1 on)
+ Beep(); // initial beep
+
+ uint8_t LED_status = CNT1 | CPS;
+ LEDs_write(LED_status);
+
+ // set the 1 sec ticker to periodically call the Update() routine
+ // NOTE: this is also the 1-sec time base for counters. A better approach
+ // would replace the ticker with an interrupt from the RTC (to be implemented)
+ Sec_Beat.attach(&Update, 1);
//RTC::attach(&Update, RTC::Second);
- //RTC::detach(RTC::Second);
-
- Wheel.reset(); // clear encoder
-
- PWM.period_ms(3); // set LCD backlight PWM
- PWM.write(0.8);
- /*
- BUZZ.period_ms(30); // set LCD backlight PWM
- BUZZ.write(0.2);
- */
- Sec_Beat.attach(&Update, 1);
-
- // enable & attach interrupts on rising edge of digital inputs
- TRIG1.rise(&CNT1_count);
- TRIG2.rise(&CNT2_count);
-
-
+ //RTC::detach(RTC::Second);
+
+ // main loop does nothing as all activities are interrupt driven
while(1)
{
- // do nothing
-
+ // dance (or do nothing)
}
}
-// ------------- Refresh Display ------------------------
-
-void RefreshDisplay(void)
-{
- Display.write_digit(1, 1, Digit_Disp[6]); // device, digit, data
- Display.write_digit(1, 2, Digit_Disp[5]); // device, digit, data
- Display.write_digit(1, 3, Digit_Disp[4]); // device, digit, data
- Display.write_digit(1, 4, Digit_Disp[3]); // device, digit, data
- Display.write_digit(1, 5, Digit_Disp[2]); // device, digit, data
- Display.write_digit(1, 6, Digit_Disp[1]); // device, digit, data
- Display.write_digit(1, 7, Digit_Disp[0]); // device, digit, data
-
- return;
-}
-
-
-
+//-------- END OF MAIN --------------
//==============================================================================
-void Update() // refresh display data
-{
- char TextString[9];
- gate++;
-
- if(QEIPB)
- AUX = 1;
- else
- AUX = 0;
+// Definition of routines
+
+//---------------------------------------------------------------------------
+// Update values to be displayed
+
+void Update()
+{
+ ADC_val = KEYB.read(); // read voltage from keyboard
- if(gate==TGATE)
- {
- //value = (int)(CNT1/TGATE);
- value = int(Wheel.getPulses());
-
- if(value<MAX_VAL)
- {
- snprintf(TextString, 8, "%7d", value); // int to string
- seconds = time(NULL);
- strftime(Text, 50, "%d-%b-%Y %H:%M:%S", localtime(&seconds));
- PC.printf("RTC: %s, CNT1: %7d CNT2: %7d\n",Text, CNT1, CNT2);
+ if(ADC_val<0.1) // RESET pushbutton pressed
+ {
+ Count1 = 0; // clear counters
+ Count2 = 0;
+ }
+
+ if((ADC_val>0.4)&&(ADC_val<0.6)) // START/STOP pushbutton pressed
+ Stopped=!Stopped; // toggle status
+
+ if(Stopped)
+ {
+ // disable interrupts on TRIG1 and TRIG2
+ TRIG1.rise(NULL);
+ TRIG2.rise(NULL);
- for(uint8_t i=0; i<7; i++)
- {
- if(TextString[i]==' ') // blanking empty digits
- TextString[i]= 0xFF;
- else
- TextString[i]=TextString[i]-'0';
-
- Digit_Disp[i] = TextString[i];
-
- }
- }
+ // show zero gate time
+ gate = 0;
+ Display_2D_write(gate);
- else
- {
- for(uint8_t i=0; i<7; i++) // all minus
- Digit_Disp[i] = 10;
- }
-
- RefreshDisplay();
+ // show selected content on main display
+ value = (int)(Count1/TGATE);
+ Display_6D_write(value); // refresh the main display
+ }
- CNT1=0;
- CNT2=0;
- gate = 0;
- }
else
{
- value = TGATE - gate;
- snprintf(TextString, 8, "%7d", value);
- for(uint8_t i=6; i<8; i++)
- {
- if(TextString[i]==' ') // blanking empty digits
- TextString[i]= 0xFF;
- else
- TextString[i]=TextString[i]-'0';
- }
-
- //Digit_Disp[1] = TextString[6];
- //Digit_Disp[0] = TextString[7];
+ // Enable interrupts on rising edge of digital inputs TRIG1 & TRIG2
+ TRIG1.rise(&Count1_up);
+ TRIG2.rise(&Count2_up);
+
+ if(gate==0) // show the counter value at the end of the gate time
+ {
+ value = (int)(Count1/TGATE);
+ //value = int(Wheel.getPulses());
- RefreshDisplay();
+ Display_6D_write(value); // refresh the main display
+
+ Count1 = 0; // clear both counters
+ Count2 = 0;
+ gate = TGATE;// and reload the gate time
+
+ }
+
+ Display_2D_write(gate); // show gate time countdown
+ gate--;
+
+ // Timestamp to PC (debug)
+ seconds = time(NULL); // get current time
+ //strftime(Text, 50, "%d-%b-%Y %H:%M:%S", localtime(&seconds));
+ strftime(Text, 50, "%H:%M:%S", localtime(&seconds));
+ PC.printf("RTC: %s, CNT1: %7d CNT2: %7d\n",Text, Count1, Count2);
+
}
+
-
return;
}
//---------------------------------------------------------------------------
-void CNT1_count(void)
-{ //function to call upon interrupt
- CNT1++; //increment counter object
+// Increment CNT1 every time a rising edge is detected on TRIG1 (interrupt)
+
+void Count1_up(void)
+{
+ Count1++;
+ return;
+}
+
+
+//---------------------------------------------------------------------------
+// Increment CNT1 every time a rising edge is detected on TRIG2 (interrupt)
+
+void Count2_up(void)
+{
+ Count2++;
+ return;
+}
+
+
+//---------------------------------------------------------------------------
+//Generates a short beep via BUZZ
+
+void Beep(void)
+{
+ BUZZ = 1; // turn-on the buzzer
+ wait(0.3); // wait
+ BUZZ = 0; // turn-off the buzzer
return;
}
//---------------------------------------------------------------------------
-void CNT2_count(void)
-{ //function to call upon interrupt
- CNT2++; //increment counter object
+//Write to 74HC595 (LEDs) - Take care to avoid conflict with MAX7219
+
+void LEDs_write(unsigned short data_val)
+{
+ // Update 74HC595 shift registers
+ unsigned short mask;
+
+ SCK = 0;
+ wait_us(DT);
+ CS2 = 0;
+
+ for(mask = 0x80; mask!= 0; mask>>= 1)
+ {
+ wait_us(DT);
+ SCK = 0;
+ if(mask & data_val)
+ MOSI = 0;
+ else
+ MOSI = 1;
+ wait_us(DT);
+ SCK = 1;
+ }
+
+ SCK = 0;
+ wait_us(DT);
+ CS2 = 1;
+
return;
}
+//---------------------------------------------------------------------------
+// Initialize the MAX7219
+
+void Display_init(void)
+{
+ uint8_t i;
+ uint16_t mask;
+ uint16_t data_to_send[6] = {SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
+ //{SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
+ for(i = 0; i <6; i++)
+ {
+ CS1 = 0;
+
+ for(mask = 0x8000; mask!= 0; mask>>= 1)
+ {
+ wait_us(DT);
+ SCK = 0;
+ if(mask & data_to_send[i])
+ MOSI = 1;
+ else
+ MOSI = 0;
+ wait_us(DT);
+ SCK = 1;
+ }
+
+ wait_us(DT);
+ SCK = 0;
+ wait_us(DT);
+ CS1 = 1;
+ }
+
+ return;
+}
+
+
+//---------------------------------------------------------------------------
+// Refresh the 6 digits of the main display
+
+void Display_6D_write(uint8_t value)
+{
+
+ uint8_t digit;
+ uint16_t mask, data_to_send;
+ char TextString[6];
+
+ // int to string, then string to digits
+
+ sprintf(TextString, "%6d", value); // int to string
+
+ for(uint8_t i=0; i<6; i++)
+ {
+ if(TextString[i] == ' ') // blank empty digits
+ Disp_Digit[i] = 0xFF;
+ else
+ Disp_Digit[i] = TextString[i]-'0';
+ }
+
+ // write to chip
+
+ SCK = 0;
+ wait_us(DT);
+
+ for(digit = 1; digit <7; digit++)
+ {
+ // each stream consists of digit address and data to show
+ data_to_send = 7-digit;
+ data_to_send<<=8;
+ data_to_send = data_to_send | Disp_Digit[digit-1];
+
+ CS1 = 0;
+
+ for(mask = 0x8000; mask!= 0; mask>>= 1)
+ {
+ wait_us(DT);
+ SCK = 0;
+ if(mask & data_to_send)
+ MOSI = 1;
+ else
+ MOSI = 0;
+
+ wait_us(DT);
+ SCK = 1;
+ }
+
+ wait_us(DT);
+ SCK = 0;
+ wait_us(DT);
+ CS1 = 1;
+ }
+
+ return;
+}
+
+
+//---------------------------------------------------------------------------
+// Refresh the 2 digits of the gate display
+
+void Display_2D_write(unsigned short value)
+{
+
+ uint8_t digit;
+ uint16_t mask, data_to_send;
+ char TextString[2];
+
+ // int to string, then string to digits
+
+ sprintf(TextString, "%2d", value); // int to string
+
+ if(TextString[0] == ' ') // blank empty digits
+ Disp_Digit[7] = 0xFF;
+ else
+ Disp_Digit[7] = TextString[0] - '0';
+
+ Disp_Digit[6] = TextString[1] - '0';
+
+ // write to chip
+
+ SCK = 0;
+ wait_us(DT);
+
+ for(digit = 7; digit <9; digit++)
+ {
+ // each stream consists of digit address and data to show
+ data_to_send = digit;
+ data_to_send<<=8;
+ data_to_send = data_to_send | Disp_Digit[digit-1];
+
+ CS1 = 0;
+
+ for(mask = 0x8000; mask!= 0; mask>>= 1)
+ {
+ wait_us(DT);
+ SCK = 0;
+
+ if(mask & data_to_send)
+ MOSI = 1;
+ else
+ MOSI = 0;
+
+ wait_us(DT);
+ SCK = 1;
+ }
+
+ wait_us(DT);
+ SCK = 0;
+ wait_us(DT);
+ CS1 = 1;
+ }
+
+ return;
+}
+
+//-------- END OF FILE --------------
+//==============================================================================
+
+
+