charles young / Mbed 2 deprecated GEO_COUNTER_L432KC

Charles Young's development fork. Going forward I only want to push mature code to main repository.

Dependencies:   mbed

Fork of GEO_COUNTER_L432KC by Geo Electronics "Geo Counter"

main.cpp@9:af4f55093f49, 2018-09-03 (annotated)

Committer:
charlesdavidyoung
Date:
Mon Sep 03 01:08:53 2018 +0000
Revision:
9:af4f55093f49
Parent:
8:5e70ca85fcb1 
Prepare to consolidate PC logging

Who changed what in which revision?

UserRevisionLine numberNew contents of line
walter76 2:ac0ed3d84d44 1 // GEO COUNTER V1 firmware
walter76 2:ac0ed3d84d44 2 // This FW provides a basic operation of GEO-COUNTER
walter76 2:ac0ed3d84d44 3 //
walter76 2:ac0ed3d84d44 4 // Latest review: August 27, 2018 - Walter Trovo
walter76 1:75827d765e34 5 //
walter76 1:75827d765e34 6 // Feb 14, 2018: initial release aimed to test the counters, the serial port
walter76 1:75827d765e34 7 // the PWM output and the MAX7219 operation.
walter76 1:75827d765e34 8 // Feb 15, 2018: Removed MAX7219 libray (replaced with custom routine).
walter76 1:75827d765e34 9 // Added 74HC595 routine. Added beep. Added Gate_write
walter76 1:75827d765e34 10 //
walter76 2:ac0ed3d84d44 11
walter76 1:75827d765e34 12
walter76 1:75827d765e34 13 // this block includes key libraries
walter76 1:75827d765e34 14 #include "mbed.h" // global Mbed library (always needed)
walter76 1:75827d765e34 15 #include <string> // strings management
walter76 1:75827d765e34 16 #include "QEI.h" // Quadrature Encoder functions
walter76 1:75827d765e34 17
walter76 1:75827d765e34 18 // definitions of fixed parameters
walter76 0:6d1742703713 19
walter76 1:75827d765e34 20 #define DEC_MODE 0x09FF // BCD decoding on all digits
walter76 1:75827d765e34 21 #define BRIGHTNESS 0x0A0F // max brightness
walter76 1:75827d765e34 22 #define SCAN_LIM 0x0B07 // use all 8 digits
walter76 1:75827d765e34 23 #define TURN_ON 0x0C01 // no shutdown (operating)
walter76 1:75827d765e34 24 #define SHUTDOWN 0x0C00 // shutdown
walter76 1:75827d765e34 25 #define TEST 0x0F00 // no test
walter76 1:75827d765e34 26
walter76 1:75827d765e34 27 #define DT 1 // delay time in us for SPI emulation
walter76 1:75827d765e34 28
walter76 1:75827d765e34 29 #define TGATE 10 // gate time (currently fixed for testing purpose)
walter76 1:75827d765e34 30 #define MAX_VAL 999999 // Max value managed by the 6-digits display
walter76 0:6d1742703713 31
walter76 1:75827d765e34 32
walter76 1:75827d765e34 33 #define CPM 0x01
walter76 1:75827d765e34 34 #define CPS 0x02
walter76 1:75827d765e34 35 #define PLS 0x04
walter76 1:75827d765e34 36 #define VOLTS 0x08
walter76 1:75827d765e34 37 #define CNT1 0x10
walter76 1:75827d765e34 38 #define CNT2 0x20
walter76 1:75827d765e34 39 #define HV 0x40
walter76 1:75827d765e34 40 #define MENU 0x80
charlesdavidyoung 8:5e70ca85fcb1 41 uint8_t LED_statuses[] = {CPM, CPS, PLS, VOLTS, CNT1, CNT2, HV, MENU};
Charles David Young 7:9f975e00600c 42 uint8_t LED_status = CPM;
Charles David Young 7:9f975e00600c 43 uint8_t LED_status_index = 0;
walter76 1:75827d765e34 44
walter76 1:75827d765e34 45 // definitions of the input/outputs (pins)
walter76 1:75827d765e34 46 DigitalOut AUX (D2); // AUX control for GPS module
walter76 0:6d1742703713 47 InterruptIn TRIG1 (D3); // Counter 1 trigger
walter76 0:6d1742703713 48 InterruptIn TRIG2 (D6); // Counter 2 trigger
walter76 1:75827d765e34 49 DigitalIn QEIPB (D9); // Quadrature encoder pushbutton
walter76 0:6d1742703713 50 PwmOut PWM (D10); // PWM output
walter76 1:75827d765e34 51 DigitalOut BUZZ (D13); // Buzzer
walter76 0:6d1742703713 52
walter76 1:75827d765e34 53 AnalogIn AIN0 (A0); // ADC input 0 (High Voltage)
walter76 1:75827d765e34 54 AnalogIn AIN1 (A1); // ADC input 1 (aux)
walter76 1:75827d765e34 55 DigitalOut CS2 (A2); // 74HC595 RCLK (pin 12)
walter76 1:75827d765e34 56 DigitalOut CS1 (A3); // MAX7219 CS (pin 12)
walter76 1:75827d765e34 57 DigitalOut SCK (A4); // 74HC595 SRCLK (pin 11) & MAX7219 SCK (pin 13)
walter76 1:75827d765e34 58 AnalogIn KEYB (A5); // Keyboard input (SW2 & SW3)
walter76 1:75827d765e34 59 DigitalOut MOSI (A6); // 74HC595 SER (pin 14) & MAX7219 DIN (pin 1)
walter76 1:75827d765e34 60 DigitalIn UN (A7); // Unused (in V1 PCB A5 and A7 must be connected)
walter76 1:75827d765e34 61
charlesdavidyoung 5:4f90b458dbdf 62 // LED on processor board
charlesdavidyoung 5:4f90b458dbdf 63 DigitalOut led1(LED1);
walter76 1:75827d765e34 64
walter76 1:75827d765e34 65 // definitions of peripherals and devices
Charles David Young 7:9f975e00600c 66
Charles David Young 7:9f975e00600c 67 // QEI class supports the mode wheel. In its most basic function it will tell
Charles David Young 7:9f975e00600c 68 // us which direction the wheel is moving (right or left) so that we can
Charles David Young 7:9f975e00600c 69 // use it to select the current mode.
walter76 1:75827d765e34 70 QEI Wheel(D12, D11, NC, 16); // Quadrature encoder
Charles David Young 7:9f975e00600c 71 int WheelCurrent = 0;
Charles David Young 7:9f975e00600c 72 int WheelPrevious = 0;
Charles David Young 7:9f975e00600c 73
walter76 1:75827d765e34 74 I2C i2c(D4, D5); // I2C port
walter76 1:75827d765e34 75 Ticker Sec_Beat; // 1 second ticker
walter76 1:75827d765e34 76 Serial PC(USBTX, USBRX); // Virtual COM via USB (PC connection)
walter76 1:75827d765e34 77 Serial GPS(D1, D0); // Serial port for GPS module
walter76 0:6d1742703713 78
walter76 0:6d1742703713 79 // Global variables
walter76 1:75827d765e34 80 uint8_t Disp_Digit[8]; // used to manage 8-digits through MAX7219
walter76 1:75827d765e34 81 uint16_t Stream; // used to stream out serial data to MAX7219
walter76 1:75827d765e34 82 time_t seconds; // Real-Time Clock (RTC) timestamp
walter76 1:75827d765e34 83 unsigned int value = 0; // displayed value on the 6-digits of the display
walter76 1:75827d765e34 84 uint8_t gate = TGATE; // displayed value on the 2-digits display
walter76 1:75827d765e34 85 uint32_t Count1, Count2; // pulse counters (32-bit)
walter76 1:75827d765e34 86 char Text[40]=""; // used to send messages over the serial port
walter76 1:75827d765e34 87 uint8_t Disp_mode = 0x01, Disp_unit = 0xA0; // status of 1st row and 2nd rows of LEDs
kd5byb 4:b17c6556cf1f 88 bool Stopped = 0; // status of counting activity
charlesdavidyoung 5:4f90b458dbdf 89 bool StartStopPressed = 0;// status of counting activity
walter76 1:75827d765e34 90 double ADC_val; // used to read ADC value
walter76 0:6d1742703713 91
walter76 1:75827d765e34 92 // ----- Prototypes of routines (defined below the main) -------------------
walter76 1:75827d765e34 93 void Update(void); // periodically called by the ticker
walter76 1:75827d765e34 94 void Count1_up(void); // called every time an edge is detected on TRIG1 pin
walter76 1:75827d765e34 95 void Count2_up(void); // called every time an edge is detected on TRIG2 pin
walter76 1:75827d765e34 96 void Beep(void); // used to generate a short beep (buzzer)
walter76 1:75827d765e34 97 void LEDs_write(unsigned short); // write to 74HC595 (8x LEDs)
walter76 1:75827d765e34 98 void Display_init(void); // initialize MAX7219
walter76 1:75827d765e34 99 void Display_6D_write(uint8_t); // write to MAX7219 (Main 6-digits display)
walter76 1:75827d765e34 100 void Display_2D_write(unsigned short); // write to MAX7219 (Gate 2-digits display)
walter76 0:6d1742703713 101
walter76 0:6d1742703713 102 //==============================================================================
walter76 0:6d1742703713 103 //==============================================================================
walter76 0:6d1742703713 104
walter76 0:6d1742703713 105 int main()
walter76 0:6d1742703713 106 {
walter76 0:6d1742703713 107
walter76 1:75827d765e34 108 PC.baud(115200); // set baud-rate of virtual COM port (PC connection)
charlesdavidyoung 5:4f90b458dbdf 109 PC.printf("\nGEO COUNTER V1 2108");
walter76 1:75827d765e34 110 PC.printf(__DATE__);
walter76 1:75827d765e34 111 PC.printf(" ");
walter76 1:75827d765e34 112 PC.printf(__TIME__);
walter76 1:75827d765e34 113
walter76 2:ac0ed3d84d44 114 GPS.baud(9600); // set the baud-rate of the serial port dedicated to the GPS
walter76 0:6d1742703713 115
walter76 1:75827d765e34 116 CS1 = 1; // presets CS of MAX7219
walter76 1:75827d765e34 117 CS2 = 1; // preset CS of 74HC595
walter76 1:75827d765e34 118
charlesdavidyoung 9:af4f55093f49 119 Display_6D_write(0x543210);
walter76 1:75827d765e34 120 Display_2D_write(TGATE);
walter76 1:75827d765e34 121 Display_init(); // initialize MAX7219
walter76 0:6d1742703713 122
walter76 1:75827d765e34 123 // RTC is supposed to be loose time at power down (no backup battery)
walter76 1:75827d765e34 124 // An initialization is performed anyway
walter76 1:75827d765e34 125 set_time(0); // Set time
walter76 0:6d1742703713 126
walter76 1:75827d765e34 127 Wheel.reset(); // clear the variable associated to the encoder
walter76 1:75827d765e34 128
walter76 1:75827d765e34 129 PWM.period_ms(3); // set the PWM period
walter76 1:75827d765e34 130 PWM.write(0.8); // set the PWM duty-cycle
walter76 1:75827d765e34 131
walter76 1:75827d765e34 132 LEDs_write(0x00); // initialize LEDs (CPM and CNT1 on)
walter76 1:75827d765e34 133 Beep(); // initial beep
walter76 1:75827d765e34 134
charlesdavidyoung 9:af4f55093f49 135 // set the ticker to periodically call the Update() routine so that display
charlesdavidyoung 9:af4f55093f49 136 // responds quickly enough
charlesdavidyoung 9:af4f55093f49 137 Sec_Beat.attach_us(&Update, 100000);
walter76 1:75827d765e34 138 // NOTE: this is also the 1-sec time base for counters. A better approach
walter76 1:75827d765e34 139 // would replace the ticker with an interrupt from the RTC (to be implemented)
walter76 0:6d1742703713 140 //RTC::attach(&Update, RTC::Second);
walter76 1:75827d765e34 141 //RTC::detach(RTC::Second);
walter76 1:75827d765e34 142
walter76 1:75827d765e34 143 // main loop does nothing as all activities are interrupt driven
walter76 0:6d1742703713 144 while(1)
walter76 0:6d1742703713 145 {
walter76 2:ac0ed3d84d44 146 // dance (or drink a beer)
walter76 0:6d1742703713 147 }
walter76 0:6d1742703713 148 }
walter76 0:6d1742703713 149
walter76 0:6d1742703713 150
walter76 1:75827d765e34 151 //-------- END OF MAIN --------------
walter76 0:6d1742703713 152 //==============================================================================
walter76 0:6d1742703713 153
walter76 1:75827d765e34 154 // Definition of routines
walter76 1:75827d765e34 155
walter76 1:75827d765e34 156 //---------------------------------------------------------------------------
walter76 1:75827d765e34 157 // Update values to be displayed
walter76 1:75827d765e34 158
walter76 1:75827d765e34 159 void Update()
walter76 1:75827d765e34 160 {
Charles David Young 7:9f975e00600c 161 LEDs_write(LED_statuses[LED_status_index]);
Charles David Young 7:9f975e00600c 162
walter76 1:75827d765e34 163 ADC_val = KEYB.read(); // read voltage from keyboard
charlesdavidyoung 5:4f90b458dbdf 164 PC.printf("\nADC: %.02f", ADC_val);
charlesdavidyoung 5:4f90b458dbdf 165 if ( (ADC_val<0.1) // START/STOP pushbutton pressed
charlesdavidyoung 5:4f90b458dbdf 166 && (!StartStopPressed))
charlesdavidyoung 5:4f90b458dbdf 167 {
charlesdavidyoung 5:4f90b458dbdf 168 StartStopPressed = true;
charlesdavidyoung 5:4f90b458dbdf 169 Stopped=!Stopped; // toggle status
charlesdavidyoung 5:4f90b458dbdf 170 }
charlesdavidyoung 5:4f90b458dbdf 171 else
charlesdavidyoung 5:4f90b458dbdf 172 StartStopPressed = false;
charlesdavidyoung 5:4f90b458dbdf 173
charlesdavidyoung 5:4f90b458dbdf 174 if((ADC_val>0.6)&&(ADC_val<0.7)) // CLEAR pushbutton pressed
charlesdavidyoung 5:4f90b458dbdf 175 {
walter76 1:75827d765e34 176 Count1 = 0; // clear counters
walter76 1:75827d765e34 177 Count2 = 0;
charlesdavidyoung 5:4f90b458dbdf 178 }
charlesdavidyoung 5:4f90b458dbdf 179
walter76 1:75827d765e34 180 if(Stopped)
walter76 1:75827d765e34 181 {
walter76 1:75827d765e34 182 // disable interrupts on TRIG1 and TRIG2
kd5byb 4:b17c6556cf1f 183
charlesdavidyoung 5:4f90b458dbdf 184 PC.printf(" stopped");
walter76 1:75827d765e34 185 TRIG1.rise(NULL);
walter76 1:75827d765e34 186 TRIG2.rise(NULL);
walter76 0:6d1742703713 187
walter76 1:75827d765e34 188 // show zero gate time
walter76 1:75827d765e34 189 gate = 0;
walter76 1:75827d765e34 190 Display_2D_write(gate);
walter76 0:6d1742703713 191
walter76 1:75827d765e34 192 // show selected content on main display
walter76 1:75827d765e34 193 value = (int)(Count1/TGATE);
walter76 1:75827d765e34 194 Display_6D_write(value); // refresh the main display
walter76 1:75827d765e34 195 }
walter76 0:6d1742703713 196
walter76 0:6d1742703713 197 else
walter76 0:6d1742703713 198 {
walter76 1:75827d765e34 199 // Enable interrupts on rising edge of digital inputs TRIG1 & TRIG2
kd5byb 4:b17c6556cf1f 200
charlesdavidyoung 5:4f90b458dbdf 201 PC.printf(" started");
walter76 1:75827d765e34 202 TRIG1.rise(&Count1_up);
walter76 1:75827d765e34 203 TRIG2.rise(&Count2_up);
walter76 1:75827d765e34 204
walter76 1:75827d765e34 205 if(gate==0) // show the counter value at the end of the gate time
walter76 1:75827d765e34 206 {
walter76 1:75827d765e34 207 value = (int)(Count1/TGATE);
walter76 0:6d1742703713 208
walter76 1:75827d765e34 209 Display_6D_write(value); // refresh the main display
walter76 1:75827d765e34 210
walter76 1:75827d765e34 211 Count1 = 0; // clear both counters
walter76 1:75827d765e34 212 Count2 = 0;
walter76 1:75827d765e34 213 gate = TGATE;// and reload the gate time
walter76 1:75827d765e34 214
walter76 1:75827d765e34 215 }
walter76 1:75827d765e34 216
walter76 1:75827d765e34 217 Display_2D_write(gate); // show gate time countdown
walter76 1:75827d765e34 218 gate--;
walter76 0:6d1742703713 219 }
walter76 1:75827d765e34 220
charlesdavidyoung 5:4f90b458dbdf 221 // Timestamp to PC (debug)
charlesdavidyoung 5:4f90b458dbdf 222 seconds = time(NULL); // get current time
charlesdavidyoung 5:4f90b458dbdf 223 strftime(Text, 50, "%H:%M:%S", localtime(&seconds));
charlesdavidyoung 5:4f90b458dbdf 224 PC.printf(" RTC: %s, CNT1: %7d CNT2: %7d",Text, Count1, Count2);
charlesdavidyoung 5:4f90b458dbdf 225
charlesdavidyoung 9:af4f55093f49 226 // Manage wheel by comparing current position to previous and
charlesdavidyoung 9:af4f55093f49 227 // sequencing through the modes according to whether the wheel
charlesdavidyoung 9:af4f55093f49 228 // is turning clockwise or counterclockwise.
Charles David Young 7:9f975e00600c 229 WheelCurrent = int(Wheel.getPulses());
Charles David Young 7:9f975e00600c 230 PC.printf(" started %d", WheelCurrent);
Charles David Young 7:9f975e00600c 231 if (WheelCurrent > WheelPrevious)
charlesdavidyoung 8:5e70ca85fcb1 232 LED_status_index = ++LED_status_index % sizeof(LED_statuses);
Charles David Young 7:9f975e00600c 233 else
Charles David Young 7:9f975e00600c 234 if (WheelCurrent < WheelPrevious)
charlesdavidyoung 8:5e70ca85fcb1 235 LED_status_index = --LED_status_index % sizeof(LED_statuses);
Charles David Young 7:9f975e00600c 236 WheelPrevious = WheelCurrent;
Charles David Young 7:9f975e00600c 237
walter76 0:6d1742703713 238 return;
walter76 0:6d1742703713 239 }
walter76 0:6d1742703713 240
walter76 0:6d1742703713 241 //---------------------------------------------------------------------------
walter76 1:75827d765e34 242 // Increment CNT1 every time a rising edge is detected on TRIG1 (interrupt)
walter76 1:75827d765e34 243
walter76 1:75827d765e34 244 void Count1_up(void)
walter76 1:75827d765e34 245 {
walter76 1:75827d765e34 246 Count1++;
walter76 1:75827d765e34 247 return;
walter76 1:75827d765e34 248 }
walter76 1:75827d765e34 249
walter76 1:75827d765e34 250
walter76 1:75827d765e34 251 //---------------------------------------------------------------------------
walter76 1:75827d765e34 252 // Increment CNT1 every time a rising edge is detected on TRIG2 (interrupt)
walter76 1:75827d765e34 253
walter76 1:75827d765e34 254 void Count2_up(void)
walter76 1:75827d765e34 255 {
walter76 1:75827d765e34 256 Count2++;
walter76 1:75827d765e34 257 return;
walter76 1:75827d765e34 258 }
walter76 1:75827d765e34 259
walter76 1:75827d765e34 260
walter76 1:75827d765e34 261 //---------------------------------------------------------------------------
walter76 1:75827d765e34 262 //Generates a short beep via BUZZ
walter76 1:75827d765e34 263
walter76 1:75827d765e34 264 void Beep(void)
walter76 1:75827d765e34 265 {
walter76 1:75827d765e34 266 BUZZ = 1; // turn-on the buzzer
walter76 1:75827d765e34 267 wait(0.3); // wait
walter76 1:75827d765e34 268 BUZZ = 0; // turn-off the buzzer
walter76 0:6d1742703713 269 return;
walter76 0:6d1742703713 270 }
walter76 0:6d1742703713 271
walter76 0:6d1742703713 272
walter76 0:6d1742703713 273 //---------------------------------------------------------------------------
walter76 1:75827d765e34 274 //Write to 74HC595 (LEDs) - Take care to avoid conflict with MAX7219
walter76 1:75827d765e34 275
walter76 1:75827d765e34 276 void LEDs_write(unsigned short data_val)
walter76 1:75827d765e34 277 {
walter76 1:75827d765e34 278 // Update 74HC595 shift registers
walter76 1:75827d765e34 279 unsigned short mask;
walter76 1:75827d765e34 280
walter76 1:75827d765e34 281 SCK = 0;
walter76 1:75827d765e34 282 wait_us(DT);
walter76 1:75827d765e34 283 CS2 = 0;
walter76 1:75827d765e34 284
walter76 1:75827d765e34 285 for(mask = 0x80; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 286 {
walter76 1:75827d765e34 287 wait_us(DT);
walter76 1:75827d765e34 288 SCK = 0;
walter76 1:75827d765e34 289 if(mask & data_val)
walter76 1:75827d765e34 290 MOSI = 0;
walter76 1:75827d765e34 291 else
walter76 1:75827d765e34 292 MOSI = 1;
walter76 1:75827d765e34 293 wait_us(DT);
walter76 1:75827d765e34 294 SCK = 1;
walter76 1:75827d765e34 295 }
walter76 1:75827d765e34 296
walter76 1:75827d765e34 297 SCK = 0;
walter76 1:75827d765e34 298 wait_us(DT);
walter76 1:75827d765e34 299 CS2 = 1;
walter76 1:75827d765e34 300
walter76 0:6d1742703713 301 return;
walter76 0:6d1742703713 302 }
walter76 0:6d1742703713 303
walter76 0:6d1742703713 304
walter76 1:75827d765e34 305 //---------------------------------------------------------------------------
walter76 1:75827d765e34 306 // Initialize the MAX7219
walter76 1:75827d765e34 307
walter76 1:75827d765e34 308 void Display_init(void)
walter76 1:75827d765e34 309 {
walter76 1:75827d765e34 310 uint8_t i;
walter76 1:75827d765e34 311 uint16_t mask;
walter76 1:75827d765e34 312 uint16_t data_to_send[6] = {SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
walter76 1:75827d765e34 313 //{SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
walter76 1:75827d765e34 314 for(i = 0; i <6; i++)
walter76 1:75827d765e34 315 {
walter76 1:75827d765e34 316 CS1 = 0;
walter76 1:75827d765e34 317
walter76 1:75827d765e34 318 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 319 {
walter76 1:75827d765e34 320 wait_us(DT);
walter76 1:75827d765e34 321 SCK = 0;
walter76 1:75827d765e34 322 if(mask & data_to_send[i])
walter76 1:75827d765e34 323 MOSI = 1;
walter76 1:75827d765e34 324 else
walter76 1:75827d765e34 325 MOSI = 0;
walter76 1:75827d765e34 326 wait_us(DT);
walter76 1:75827d765e34 327 SCK = 1;
walter76 1:75827d765e34 328 }
walter76 1:75827d765e34 329
walter76 1:75827d765e34 330 wait_us(DT);
walter76 1:75827d765e34 331 SCK = 0;
walter76 1:75827d765e34 332 wait_us(DT);
walter76 1:75827d765e34 333 CS1 = 1;
walter76 1:75827d765e34 334 }
walter76 1:75827d765e34 335
walter76 1:75827d765e34 336 return;
walter76 1:75827d765e34 337 }
walter76 1:75827d765e34 338
walter76 1:75827d765e34 339
walter76 1:75827d765e34 340 //---------------------------------------------------------------------------
walter76 1:75827d765e34 341 // Refresh the 6 digits of the main display
walter76 1:75827d765e34 342
walter76 1:75827d765e34 343 void Display_6D_write(uint8_t value)
walter76 1:75827d765e34 344 {
walter76 1:75827d765e34 345
walter76 1:75827d765e34 346 uint8_t digit;
walter76 1:75827d765e34 347 uint16_t mask, data_to_send;
walter76 1:75827d765e34 348 char TextString[6];
walter76 1:75827d765e34 349
walter76 1:75827d765e34 350 // int to string, then string to digits
walter76 1:75827d765e34 351
walter76 1:75827d765e34 352 sprintf(TextString, "%6d", value); // int to string
walter76 1:75827d765e34 353
walter76 1:75827d765e34 354 for(uint8_t i=0; i<6; i++)
walter76 1:75827d765e34 355 {
walter76 1:75827d765e34 356 if(TextString[i] == ' ') // blank empty digits
walter76 1:75827d765e34 357 Disp_Digit[i] = 0xFF;
walter76 1:75827d765e34 358 else
walter76 1:75827d765e34 359 Disp_Digit[i] = TextString[i]-'0';
walter76 1:75827d765e34 360 }
walter76 1:75827d765e34 361
walter76 1:75827d765e34 362 // write to chip
walter76 1:75827d765e34 363
walter76 1:75827d765e34 364 SCK = 0;
walter76 1:75827d765e34 365 wait_us(DT);
walter76 1:75827d765e34 366
walter76 1:75827d765e34 367 for(digit = 1; digit <7; digit++)
walter76 1:75827d765e34 368 {
walter76 1:75827d765e34 369 // each stream consists of digit address and data to show
Charles David Young 6:05201ecabb95 370 data_to_send = 7 - digit;
walter76 1:75827d765e34 371 data_to_send<<=8;
walter76 1:75827d765e34 372 data_to_send = data_to_send | Disp_Digit[digit-1];
walter76 1:75827d765e34 373
walter76 1:75827d765e34 374 CS1 = 0;
walter76 1:75827d765e34 375
walter76 1:75827d765e34 376 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 377 {
walter76 1:75827d765e34 378 wait_us(DT);
walter76 1:75827d765e34 379 SCK = 0;
walter76 1:75827d765e34 380 if(mask & data_to_send)
walter76 1:75827d765e34 381 MOSI = 1;
walter76 1:75827d765e34 382 else
walter76 1:75827d765e34 383 MOSI = 0;
walter76 1:75827d765e34 384
walter76 1:75827d765e34 385 wait_us(DT);
walter76 1:75827d765e34 386 SCK = 1;
walter76 1:75827d765e34 387 }
walter76 1:75827d765e34 388
walter76 1:75827d765e34 389 wait_us(DT);
walter76 1:75827d765e34 390 SCK = 0;
walter76 1:75827d765e34 391 wait_us(DT);
walter76 1:75827d765e34 392 CS1 = 1;
walter76 1:75827d765e34 393 }
walter76 1:75827d765e34 394
walter76 1:75827d765e34 395 return;
walter76 1:75827d765e34 396 }
walter76 1:75827d765e34 397
walter76 1:75827d765e34 398
walter76 1:75827d765e34 399 //---------------------------------------------------------------------------
walter76 1:75827d765e34 400 // Refresh the 2 digits of the gate display
walter76 1:75827d765e34 401
walter76 1:75827d765e34 402 void Display_2D_write(unsigned short value)
walter76 1:75827d765e34 403 {
walter76 1:75827d765e34 404
walter76 1:75827d765e34 405 uint8_t digit;
walter76 1:75827d765e34 406 uint16_t mask, data_to_send;
walter76 1:75827d765e34 407 char TextString[2];
walter76 1:75827d765e34 408
walter76 1:75827d765e34 409 // int to string, then string to digits
walter76 1:75827d765e34 410
walter76 1:75827d765e34 411 sprintf(TextString, "%2d", value); // int to string
walter76 1:75827d765e34 412
walter76 1:75827d765e34 413 if(TextString[0] == ' ') // blank empty digits
walter76 1:75827d765e34 414 Disp_Digit[7] = 0xFF;
walter76 1:75827d765e34 415 else
walter76 1:75827d765e34 416 Disp_Digit[7] = TextString[0] - '0';
walter76 1:75827d765e34 417
walter76 1:75827d765e34 418 Disp_Digit[6] = TextString[1] - '0';
walter76 1:75827d765e34 419
walter76 1:75827d765e34 420 // write to chip
walter76 1:75827d765e34 421
walter76 1:75827d765e34 422 SCK = 0;
walter76 1:75827d765e34 423 wait_us(DT);
walter76 1:75827d765e34 424
walter76 1:75827d765e34 425 for(digit = 7; digit <9; digit++)
walter76 1:75827d765e34 426 {
walter76 1:75827d765e34 427 // each stream consists of digit address and data to show
walter76 1:75827d765e34 428 data_to_send = digit;
walter76 1:75827d765e34 429 data_to_send<<=8;
walter76 1:75827d765e34 430 data_to_send = data_to_send | Disp_Digit[digit-1];
walter76 1:75827d765e34 431
walter76 1:75827d765e34 432 CS1 = 0;
walter76 1:75827d765e34 433
walter76 1:75827d765e34 434 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 435 {
walter76 1:75827d765e34 436 wait_us(DT);
walter76 1:75827d765e34 437 SCK = 0;
walter76 1:75827d765e34 438
walter76 1:75827d765e34 439 if(mask & data_to_send)
walter76 1:75827d765e34 440 MOSI = 1;
walter76 1:75827d765e34 441 else
walter76 1:75827d765e34 442 MOSI = 0;
walter76 1:75827d765e34 443
walter76 1:75827d765e34 444 wait_us(DT);
walter76 1:75827d765e34 445 SCK = 1;
walter76 1:75827d765e34 446 }
walter76 1:75827d765e34 447
walter76 1:75827d765e34 448 wait_us(DT);
walter76 1:75827d765e34 449 SCK = 0;
walter76 1:75827d765e34 450 wait_us(DT);
walter76 1:75827d765e34 451 CS1 = 1;
walter76 1:75827d765e34 452 }
walter76 1:75827d765e34 453
walter76 1:75827d765e34 454 return;
walter76 1:75827d765e34 455 }
walter76 1:75827d765e34 456
walter76 1:75827d765e34 457 //-------- END OF FILE --------------
walter76 1:75827d765e34 458 //==============================================================================
walter76 1:75827d765e34 459
walter76 1:75827d765e34 460
walter76 1:75827d765e34 461