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@5:4f90b458dbdf, 2018-09-02 (annotated)

Committer:
charlesdavidyoung
Date:
Sun Sep 02 20:26:22 2018 +0000
Revision:
5:4f90b458dbdf
Parent:
4:b17c6556cf1f
Child:
6:05201ecabb95
Switched START/STOP and CLEAR buttons to match pcb labels.  Cleaned up PC log.  Discovered ADC is not changing for CLEAR button.

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
walter76 1:75827d765e34 41
walter76 1:75827d765e34 42 // definitions of the input/outputs (pins)
walter76 1:75827d765e34 43 DigitalOut AUX (D2); // AUX control for GPS module
walter76 0:6d1742703713 44 InterruptIn TRIG1 (D3); // Counter 1 trigger
walter76 0:6d1742703713 45 InterruptIn TRIG2 (D6); // Counter 2 trigger
walter76 1:75827d765e34 46 DigitalIn QEIPB (D9); // Quadrature encoder pushbutton
walter76 0:6d1742703713 47 PwmOut PWM (D10); // PWM output
walter76 1:75827d765e34 48 DigitalOut BUZZ (D13); // Buzzer
walter76 0:6d1742703713 49
walter76 1:75827d765e34 50 AnalogIn AIN0 (A0); // ADC input 0 (High Voltage)
walter76 1:75827d765e34 51 AnalogIn AIN1 (A1); // ADC input 1 (aux)
walter76 1:75827d765e34 52 DigitalOut CS2 (A2); // 74HC595 RCLK (pin 12)
walter76 1:75827d765e34 53 DigitalOut CS1 (A3); // MAX7219 CS (pin 12)
walter76 1:75827d765e34 54 DigitalOut SCK (A4); // 74HC595 SRCLK (pin 11) & MAX7219 SCK (pin 13)
walter76 1:75827d765e34 55 AnalogIn KEYB (A5); // Keyboard input (SW2 & SW3)
walter76 1:75827d765e34 56 DigitalOut MOSI (A6); // 74HC595 SER (pin 14) & MAX7219 DIN (pin 1)
walter76 1:75827d765e34 57 DigitalIn UN (A7); // Unused (in V1 PCB A5 and A7 must be connected)
walter76 1:75827d765e34 58
charlesdavidyoung 5:4f90b458dbdf 59 // LED on processor board
charlesdavidyoung 5:4f90b458dbdf 60 DigitalOut led1(LED1);
walter76 1:75827d765e34 61
walter76 1:75827d765e34 62 // definitions of peripherals and devices
walter76 1:75827d765e34 63 QEI Wheel(D12, D11, NC, 16); // Quadrature encoder
walter76 1:75827d765e34 64 I2C i2c(D4, D5); // I2C port
walter76 1:75827d765e34 65 Ticker Sec_Beat; // 1 second ticker
walter76 1:75827d765e34 66 Serial PC(USBTX, USBRX); // Virtual COM via USB (PC connection)
walter76 1:75827d765e34 67 Serial GPS(D1, D0); // Serial port for GPS module
walter76 0:6d1742703713 68
walter76 0:6d1742703713 69 // Global variables
walter76 1:75827d765e34 70 uint8_t Disp_Digit[8]; // used to manage 8-digits through MAX7219
walter76 1:75827d765e34 71 uint16_t Stream; // used to stream out serial data to MAX7219
walter76 1:75827d765e34 72 time_t seconds; // Real-Time Clock (RTC) timestamp
walter76 1:75827d765e34 73 unsigned int value = 0; // displayed value on the 6-digits of the display
walter76 1:75827d765e34 74 uint8_t gate = TGATE; // displayed value on the 2-digits display
walter76 1:75827d765e34 75 uint32_t Count1, Count2; // pulse counters (32-bit)
walter76 1:75827d765e34 76 char Text[40]=""; // used to send messages over the serial port
walter76 1:75827d765e34 77 uint8_t Disp_mode = 0x01, Disp_unit = 0xA0; // status of 1st row and 2nd rows of LEDs
kd5byb 4:b17c6556cf1f 78 bool Stopped = 0; // status of counting activity
charlesdavidyoung 5:4f90b458dbdf 79 bool StartStopPressed = 0;// status of counting activity
walter76 1:75827d765e34 80 double ADC_val; // used to read ADC value
walter76 0:6d1742703713 81
walter76 1:75827d765e34 82 // ----- Prototypes of routines (defined below the main) -------------------
walter76 1:75827d765e34 83 void Update(void); // periodically called by the ticker
walter76 1:75827d765e34 84 void Count1_up(void); // called every time an edge is detected on TRIG1 pin
walter76 1:75827d765e34 85 void Count2_up(void); // called every time an edge is detected on TRIG2 pin
walter76 1:75827d765e34 86 void Beep(void); // used to generate a short beep (buzzer)
walter76 1:75827d765e34 87 void LEDs_write(unsigned short); // write to 74HC595 (8x LEDs)
walter76 1:75827d765e34 88 void Display_init(void); // initialize MAX7219
walter76 1:75827d765e34 89 void Display_6D_write(uint8_t); // write to MAX7219 (Main 6-digits display)
walter76 1:75827d765e34 90 void Display_2D_write(unsigned short); // write to MAX7219 (Gate 2-digits display)
walter76 0:6d1742703713 91
walter76 0:6d1742703713 92 //==============================================================================
walter76 0:6d1742703713 93 //==============================================================================
walter76 0:6d1742703713 94
walter76 0:6d1742703713 95 int main()
walter76 0:6d1742703713 96 {
walter76 0:6d1742703713 97
walter76 1:75827d765e34 98 PC.baud(115200); // set baud-rate of virtual COM port (PC connection)
charlesdavidyoung 5:4f90b458dbdf 99 PC.printf("\nGEO COUNTER V1 2108");
walter76 1:75827d765e34 100 PC.printf(__DATE__);
walter76 1:75827d765e34 101 PC.printf(" ");
walter76 1:75827d765e34 102 PC.printf(__TIME__);
walter76 1:75827d765e34 103
walter76 2:ac0ed3d84d44 104 GPS.baud(9600); // set the baud-rate of the serial port dedicated to the GPS
walter76 0:6d1742703713 105
walter76 1:75827d765e34 106 CS1 = 1; // presets CS of MAX7219
walter76 1:75827d765e34 107 CS2 = 1; // preset CS of 74HC595
walter76 1:75827d765e34 108
charlesdavidyoung 5:4f90b458dbdf 109 Display_6D_write(543210);
walter76 1:75827d765e34 110 Display_2D_write(TGATE);
walter76 1:75827d765e34 111 Display_init(); // initialize MAX7219
walter76 0:6d1742703713 112
walter76 1:75827d765e34 113 // RTC is supposed to be loose time at power down (no backup battery)
walter76 1:75827d765e34 114 // An initialization is performed anyway
walter76 1:75827d765e34 115 set_time(0); // Set time
walter76 0:6d1742703713 116
walter76 1:75827d765e34 117 Wheel.reset(); // clear the variable associated to the encoder
walter76 1:75827d765e34 118
walter76 1:75827d765e34 119 PWM.period_ms(3); // set the PWM period
walter76 1:75827d765e34 120 PWM.write(0.8); // set the PWM duty-cycle
walter76 1:75827d765e34 121
walter76 1:75827d765e34 122 LEDs_write(0x00); // initialize LEDs (CPM and CNT1 on)
walter76 1:75827d765e34 123 Beep(); // initial beep
walter76 1:75827d765e34 124
walter76 1:75827d765e34 125 uint8_t LED_status = CNT1 | CPS;
walter76 1:75827d765e34 126 LEDs_write(LED_status);
walter76 1:75827d765e34 127
walter76 1:75827d765e34 128 // set the 1 sec ticker to periodically call the Update() routine
walter76 1:75827d765e34 129 // NOTE: this is also the 1-sec time base for counters. A better approach
walter76 1:75827d765e34 130 // would replace the ticker with an interrupt from the RTC (to be implemented)
Charles David Young 3:23b0185c7e7b 131 Sec_Beat.attach_us(&Update, 1000000);
walter76 0:6d1742703713 132 //RTC::attach(&Update, RTC::Second);
walter76 1:75827d765e34 133 //RTC::detach(RTC::Second);
walter76 1:75827d765e34 134
walter76 1:75827d765e34 135 // main loop does nothing as all activities are interrupt driven
walter76 0:6d1742703713 136 while(1)
walter76 0:6d1742703713 137 {
walter76 2:ac0ed3d84d44 138 // dance (or drink a beer)
walter76 0:6d1742703713 139 }
walter76 0:6d1742703713 140 }
walter76 0:6d1742703713 141
walter76 0:6d1742703713 142
walter76 1:75827d765e34 143 //-------- END OF MAIN --------------
walter76 0:6d1742703713 144 //==============================================================================
walter76 0:6d1742703713 145
walter76 1:75827d765e34 146 // Definition of routines
walter76 1:75827d765e34 147
walter76 1:75827d765e34 148 //---------------------------------------------------------------------------
walter76 1:75827d765e34 149 // Update values to be displayed
walter76 1:75827d765e34 150
walter76 1:75827d765e34 151 void Update()
walter76 1:75827d765e34 152 {
walter76 1:75827d765e34 153 ADC_val = KEYB.read(); // read voltage from keyboard
charlesdavidyoung 5:4f90b458dbdf 154 PC.printf("\nADC: %.02f", ADC_val);
charlesdavidyoung 5:4f90b458dbdf 155 if ( (ADC_val<0.1) // START/STOP pushbutton pressed
charlesdavidyoung 5:4f90b458dbdf 156 && (!StartStopPressed))
charlesdavidyoung 5:4f90b458dbdf 157 {
charlesdavidyoung 5:4f90b458dbdf 158 StartStopPressed = true;
charlesdavidyoung 5:4f90b458dbdf 159 Stopped=!Stopped; // toggle status
charlesdavidyoung 5:4f90b458dbdf 160 }
charlesdavidyoung 5:4f90b458dbdf 161 else
charlesdavidyoung 5:4f90b458dbdf 162 StartStopPressed = false;
charlesdavidyoung 5:4f90b458dbdf 163
charlesdavidyoung 5:4f90b458dbdf 164 if((ADC_val>0.6)&&(ADC_val<0.7)) // CLEAR pushbutton pressed
charlesdavidyoung 5:4f90b458dbdf 165 {
walter76 1:75827d765e34 166 Count1 = 0; // clear counters
walter76 1:75827d765e34 167 Count2 = 0;
charlesdavidyoung 5:4f90b458dbdf 168 }
charlesdavidyoung 5:4f90b458dbdf 169
walter76 1:75827d765e34 170 if(Stopped)
walter76 1:75827d765e34 171 {
walter76 1:75827d765e34 172 // disable interrupts on TRIG1 and TRIG2
kd5byb 4:b17c6556cf1f 173
charlesdavidyoung 5:4f90b458dbdf 174 PC.printf(" stopped");
walter76 1:75827d765e34 175 TRIG1.rise(NULL);
walter76 1:75827d765e34 176 TRIG2.rise(NULL);
walter76 0:6d1742703713 177
walter76 1:75827d765e34 178 // show zero gate time
walter76 1:75827d765e34 179 gate = 0;
walter76 1:75827d765e34 180 Display_2D_write(gate);
walter76 0:6d1742703713 181
walter76 1:75827d765e34 182 // show selected content on main display
walter76 1:75827d765e34 183 value = (int)(Count1/TGATE);
walter76 1:75827d765e34 184 Display_6D_write(value); // refresh the main display
walter76 1:75827d765e34 185 }
walter76 0:6d1742703713 186
walter76 0:6d1742703713 187 else
walter76 0:6d1742703713 188 {
walter76 1:75827d765e34 189 // Enable interrupts on rising edge of digital inputs TRIG1 & TRIG2
kd5byb 4:b17c6556cf1f 190
charlesdavidyoung 5:4f90b458dbdf 191 PC.printf(" started");
walter76 1:75827d765e34 192 TRIG1.rise(&Count1_up);
walter76 1:75827d765e34 193 TRIG2.rise(&Count2_up);
walter76 1:75827d765e34 194
walter76 1:75827d765e34 195 if(gate==0) // show the counter value at the end of the gate time
walter76 1:75827d765e34 196 {
walter76 1:75827d765e34 197 value = (int)(Count1/TGATE);
walter76 1:75827d765e34 198 //value = int(Wheel.getPulses());
walter76 0:6d1742703713 199
walter76 1:75827d765e34 200 Display_6D_write(value); // refresh the main display
walter76 1:75827d765e34 201
walter76 1:75827d765e34 202 Count1 = 0; // clear both counters
walter76 1:75827d765e34 203 Count2 = 0;
walter76 1:75827d765e34 204 gate = TGATE;// and reload the gate time
walter76 1:75827d765e34 205
walter76 1:75827d765e34 206 }
walter76 1:75827d765e34 207
walter76 1:75827d765e34 208 Display_2D_write(gate); // show gate time countdown
walter76 1:75827d765e34 209 gate--;
walter76 0:6d1742703713 210 }
walter76 1:75827d765e34 211
charlesdavidyoung 5:4f90b458dbdf 212 // Timestamp to PC (debug)
charlesdavidyoung 5:4f90b458dbdf 213 seconds = time(NULL); // get current time
charlesdavidyoung 5:4f90b458dbdf 214 strftime(Text, 50, "%H:%M:%S", localtime(&seconds));
charlesdavidyoung 5:4f90b458dbdf 215 PC.printf(" RTC: %s, CNT1: %7d CNT2: %7d",Text, Count1, Count2);
charlesdavidyoung 5:4f90b458dbdf 216
walter76 0:6d1742703713 217 return;
walter76 0:6d1742703713 218 }
walter76 0:6d1742703713 219
walter76 0:6d1742703713 220 //---------------------------------------------------------------------------
walter76 1:75827d765e34 221 // Increment CNT1 every time a rising edge is detected on TRIG1 (interrupt)
walter76 1:75827d765e34 222
walter76 1:75827d765e34 223 void Count1_up(void)
walter76 1:75827d765e34 224 {
walter76 1:75827d765e34 225 Count1++;
walter76 1:75827d765e34 226 return;
walter76 1:75827d765e34 227 }
walter76 1:75827d765e34 228
walter76 1:75827d765e34 229
walter76 1:75827d765e34 230 //---------------------------------------------------------------------------
walter76 1:75827d765e34 231 // Increment CNT1 every time a rising edge is detected on TRIG2 (interrupt)
walter76 1:75827d765e34 232
walter76 1:75827d765e34 233 void Count2_up(void)
walter76 1:75827d765e34 234 {
walter76 1:75827d765e34 235 Count2++;
walter76 1:75827d765e34 236 return;
walter76 1:75827d765e34 237 }
walter76 1:75827d765e34 238
walter76 1:75827d765e34 239
walter76 1:75827d765e34 240 //---------------------------------------------------------------------------
walter76 1:75827d765e34 241 //Generates a short beep via BUZZ
walter76 1:75827d765e34 242
walter76 1:75827d765e34 243 void Beep(void)
walter76 1:75827d765e34 244 {
walter76 1:75827d765e34 245 BUZZ = 1; // turn-on the buzzer
walter76 1:75827d765e34 246 wait(0.3); // wait
walter76 1:75827d765e34 247 BUZZ = 0; // turn-off the buzzer
walter76 0:6d1742703713 248 return;
walter76 0:6d1742703713 249 }
walter76 0:6d1742703713 250
walter76 0:6d1742703713 251
walter76 0:6d1742703713 252 //---------------------------------------------------------------------------
walter76 1:75827d765e34 253 //Write to 74HC595 (LEDs) - Take care to avoid conflict with MAX7219
walter76 1:75827d765e34 254
walter76 1:75827d765e34 255 void LEDs_write(unsigned short data_val)
walter76 1:75827d765e34 256 {
walter76 1:75827d765e34 257 // Update 74HC595 shift registers
walter76 1:75827d765e34 258 unsigned short mask;
walter76 1:75827d765e34 259
walter76 1:75827d765e34 260 SCK = 0;
walter76 1:75827d765e34 261 wait_us(DT);
walter76 1:75827d765e34 262 CS2 = 0;
walter76 1:75827d765e34 263
walter76 1:75827d765e34 264 for(mask = 0x80; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 265 {
walter76 1:75827d765e34 266 wait_us(DT);
walter76 1:75827d765e34 267 SCK = 0;
walter76 1:75827d765e34 268 if(mask & data_val)
walter76 1:75827d765e34 269 MOSI = 0;
walter76 1:75827d765e34 270 else
walter76 1:75827d765e34 271 MOSI = 1;
walter76 1:75827d765e34 272 wait_us(DT);
walter76 1:75827d765e34 273 SCK = 1;
walter76 1:75827d765e34 274 }
walter76 1:75827d765e34 275
walter76 1:75827d765e34 276 SCK = 0;
walter76 1:75827d765e34 277 wait_us(DT);
walter76 1:75827d765e34 278 CS2 = 1;
walter76 1:75827d765e34 279
walter76 0:6d1742703713 280 return;
walter76 0:6d1742703713 281 }
walter76 0:6d1742703713 282
walter76 0:6d1742703713 283
walter76 1:75827d765e34 284 //---------------------------------------------------------------------------
walter76 1:75827d765e34 285 // Initialize the MAX7219
walter76 1:75827d765e34 286
walter76 1:75827d765e34 287 void Display_init(void)
walter76 1:75827d765e34 288 {
walter76 1:75827d765e34 289 uint8_t i;
walter76 1:75827d765e34 290 uint16_t mask;
walter76 1:75827d765e34 291 uint16_t data_to_send[6] = {SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
walter76 1:75827d765e34 292 //{SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
walter76 1:75827d765e34 293 for(i = 0; i <6; i++)
walter76 1:75827d765e34 294 {
walter76 1:75827d765e34 295 CS1 = 0;
walter76 1:75827d765e34 296
walter76 1:75827d765e34 297 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 298 {
walter76 1:75827d765e34 299 wait_us(DT);
walter76 1:75827d765e34 300 SCK = 0;
walter76 1:75827d765e34 301 if(mask & data_to_send[i])
walter76 1:75827d765e34 302 MOSI = 1;
walter76 1:75827d765e34 303 else
walter76 1:75827d765e34 304 MOSI = 0;
walter76 1:75827d765e34 305 wait_us(DT);
walter76 1:75827d765e34 306 SCK = 1;
walter76 1:75827d765e34 307 }
walter76 1:75827d765e34 308
walter76 1:75827d765e34 309 wait_us(DT);
walter76 1:75827d765e34 310 SCK = 0;
walter76 1:75827d765e34 311 wait_us(DT);
walter76 1:75827d765e34 312 CS1 = 1;
walter76 1:75827d765e34 313 }
walter76 1:75827d765e34 314
walter76 1:75827d765e34 315 return;
walter76 1:75827d765e34 316 }
walter76 1:75827d765e34 317
walter76 1:75827d765e34 318
walter76 1:75827d765e34 319 //---------------------------------------------------------------------------
walter76 1:75827d765e34 320 // Refresh the 6 digits of the main display
walter76 1:75827d765e34 321
walter76 1:75827d765e34 322 void Display_6D_write(uint8_t value)
walter76 1:75827d765e34 323 {
walter76 1:75827d765e34 324
walter76 1:75827d765e34 325 uint8_t digit;
walter76 1:75827d765e34 326 uint16_t mask, data_to_send;
walter76 1:75827d765e34 327 char TextString[6];
walter76 1:75827d765e34 328
walter76 1:75827d765e34 329 // int to string, then string to digits
walter76 1:75827d765e34 330
walter76 1:75827d765e34 331 sprintf(TextString, "%6d", value); // int to string
walter76 1:75827d765e34 332
walter76 1:75827d765e34 333 for(uint8_t i=0; i<6; i++)
walter76 1:75827d765e34 334 {
walter76 1:75827d765e34 335 if(TextString[i] == ' ') // blank empty digits
walter76 1:75827d765e34 336 Disp_Digit[i] = 0xFF;
walter76 1:75827d765e34 337 else
walter76 1:75827d765e34 338 Disp_Digit[i] = TextString[i]-'0';
walter76 1:75827d765e34 339 }
walter76 1:75827d765e34 340
walter76 1:75827d765e34 341 // write to chip
walter76 1:75827d765e34 342
walter76 1:75827d765e34 343 SCK = 0;
walter76 1:75827d765e34 344 wait_us(DT);
walter76 1:75827d765e34 345
walter76 1:75827d765e34 346 for(digit = 1; digit <7; digit++)
walter76 1:75827d765e34 347 {
walter76 1:75827d765e34 348 // each stream consists of digit address and data to show
walter76 1:75827d765e34 349 data_to_send = 7-digit;
walter76 1:75827d765e34 350 data_to_send<<=8;
walter76 1:75827d765e34 351 data_to_send = data_to_send | Disp_Digit[digit-1];
walter76 1:75827d765e34 352
walter76 1:75827d765e34 353 CS1 = 0;
walter76 1:75827d765e34 354
walter76 1:75827d765e34 355 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 356 {
walter76 1:75827d765e34 357 wait_us(DT);
walter76 1:75827d765e34 358 SCK = 0;
walter76 1:75827d765e34 359 if(mask & data_to_send)
walter76 1:75827d765e34 360 MOSI = 1;
walter76 1:75827d765e34 361 else
walter76 1:75827d765e34 362 MOSI = 0;
walter76 1:75827d765e34 363
walter76 1:75827d765e34 364 wait_us(DT);
walter76 1:75827d765e34 365 SCK = 1;
walter76 1:75827d765e34 366 }
walter76 1:75827d765e34 367
walter76 1:75827d765e34 368 wait_us(DT);
walter76 1:75827d765e34 369 SCK = 0;
walter76 1:75827d765e34 370 wait_us(DT);
walter76 1:75827d765e34 371 CS1 = 1;
walter76 1:75827d765e34 372 }
walter76 1:75827d765e34 373
walter76 1:75827d765e34 374 return;
walter76 1:75827d765e34 375 }
walter76 1:75827d765e34 376
walter76 1:75827d765e34 377
walter76 1:75827d765e34 378 //---------------------------------------------------------------------------
walter76 1:75827d765e34 379 // Refresh the 2 digits of the gate display
walter76 1:75827d765e34 380
walter76 1:75827d765e34 381 void Display_2D_write(unsigned short value)
walter76 1:75827d765e34 382 {
walter76 1:75827d765e34 383
walter76 1:75827d765e34 384 uint8_t digit;
walter76 1:75827d765e34 385 uint16_t mask, data_to_send;
walter76 1:75827d765e34 386 char TextString[2];
walter76 1:75827d765e34 387
walter76 1:75827d765e34 388 // int to string, then string to digits
walter76 1:75827d765e34 389
walter76 1:75827d765e34 390 sprintf(TextString, "%2d", value); // int to string
walter76 1:75827d765e34 391
walter76 1:75827d765e34 392 if(TextString[0] == ' ') // blank empty digits
walter76 1:75827d765e34 393 Disp_Digit[7] = 0xFF;
walter76 1:75827d765e34 394 else
walter76 1:75827d765e34 395 Disp_Digit[7] = TextString[0] - '0';
walter76 1:75827d765e34 396
walter76 1:75827d765e34 397 Disp_Digit[6] = TextString[1] - '0';
walter76 1:75827d765e34 398
walter76 1:75827d765e34 399 // write to chip
walter76 1:75827d765e34 400
walter76 1:75827d765e34 401 SCK = 0;
walter76 1:75827d765e34 402 wait_us(DT);
walter76 1:75827d765e34 403
walter76 1:75827d765e34 404 for(digit = 7; digit <9; digit++)
walter76 1:75827d765e34 405 {
walter76 1:75827d765e34 406 // each stream consists of digit address and data to show
walter76 1:75827d765e34 407 data_to_send = digit;
walter76 1:75827d765e34 408 data_to_send<<=8;
walter76 1:75827d765e34 409 data_to_send = data_to_send | Disp_Digit[digit-1];
walter76 1:75827d765e34 410
walter76 1:75827d765e34 411 CS1 = 0;
walter76 1:75827d765e34 412
walter76 1:75827d765e34 413 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 414 {
walter76 1:75827d765e34 415 wait_us(DT);
walter76 1:75827d765e34 416 SCK = 0;
walter76 1:75827d765e34 417
walter76 1:75827d765e34 418 if(mask & data_to_send)
walter76 1:75827d765e34 419 MOSI = 1;
walter76 1:75827d765e34 420 else
walter76 1:75827d765e34 421 MOSI = 0;
walter76 1:75827d765e34 422
walter76 1:75827d765e34 423 wait_us(DT);
walter76 1:75827d765e34 424 SCK = 1;
walter76 1:75827d765e34 425 }
walter76 1:75827d765e34 426
walter76 1:75827d765e34 427 wait_us(DT);
walter76 1:75827d765e34 428 SCK = 0;
walter76 1:75827d765e34 429 wait_us(DT);
walter76 1:75827d765e34 430 CS1 = 1;
walter76 1:75827d765e34 431 }
walter76 1:75827d765e34 432
walter76 1:75827d765e34 433 return;
walter76 1:75827d765e34 434 }
walter76 1:75827d765e34 435
walter76 1:75827d765e34 436 //-------- END OF FILE --------------
walter76 1:75827d765e34 437 //==============================================================================
walter76 1:75827d765e34 438
walter76 1:75827d765e34 439
walter76 1:75827d765e34 440