Fredric Rice / Mbed 2 deprecated NextGen-Exerciser

Concept code which launches two threads, one of which implements a Modbus Tunnel protocol to talk with an ISEM, the other which launches a Modbus RTU protocol to talk to a CPUM (most of the Modbus code has been removed prior to publishing.) A canned AC and DC spectra is provided to display wave forms on start-up however the project normally polls for spectra from the ISEM and then plots is (that functionality has been removed prior to publishing.)

Dependencies:   LCD_DISCO_F429ZI mbed TS_DISCO_F429ZI mbed-os BSP_DISCO_F429ZI

/media/uploads/Damotclese/img_20190530_100915.jpg

Plot of the initial start-up canned AC and DC spectra.

NextGen-Exerciser-Main.cpp@0:387684ec9d92, 2019-05-30 (annotated)

Committer:
Damotclese
Date:
Thu May 30 05:16:27 2019 +0000
Revision:
0:387684ec9d92
Child:
1:01394e5db95b
Initial check in of working software which plots just the AC component;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Damotclese 0:387684ec9d92 1
Damotclese 0:387684ec9d92 2 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 3 // NextGen-Exerciser-Main.cpp
Damotclese 0:387684ec9d92 4 //
Damotclese 0:387684ec9d92 5 // Fredric L. Rice, May 2019
Damotclese 0:387684ec9d92 6 //
Damotclese 0:387684ec9d92 7 // o The LCD is cleared and configured
Damotclese 0:387684ec9d92 8 // o A canned AC and DC 2f water-in-ambient-air spectrum is plotted
Damotclese 0:387684ec9d92 9 // on the LCD after the spectrum is "normalized" by making each of
Damotclese 0:387684ec9d92 10 // the sample values positive and then compressed so that it fits
Damotclese 0:387684ec9d92 11 // in the display
Damotclese 0:387684ec9d92 12 // o A thread is created to perform Modbus against a CPUM device
Damotclese 0:387684ec9d92 13 // o A thread is created to perform Modbus Tunneling with foreign
Damotclese 0:387684ec9d92 14 // frames against an ISEM device
Damotclese 0:387684ec9d92 15 // o The main() thread wakes up once a second and performs whatever
Damotclese 0:387684ec9d92 16 // other functionality might be desired
Damotclese 0:387684ec9d92 17 //
Damotclese 0:387684ec9d92 18 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 19
Damotclese 0:387684ec9d92 20 #include "mbed.h" // The mbed operating system
Damotclese 0:387684ec9d92 21 #include "NextGen-Exerciser-Modbus.h" // For the CPUM Modbus thread
Damotclese 0:387684ec9d92 22 #include "NextGen-Exerciser-Tunnel.h" // For the Modbus Tunnel thread
Damotclese 0:387684ec9d92 23 #include "NextGen-Exerciser-Defines.h" // For defined constants and MACROs
Damotclese 0:387684ec9d92 24 #include "LCD_DISCO_F429ZI.h" // For controlling the LCD
Damotclese 0:387684ec9d92 25
Damotclese 0:387684ec9d92 26 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 27 // Defined constants that we will use here
Damotclese 0:387684ec9d92 28 //
Damotclese 0:387684ec9d92 29 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 30
Damotclese 0:387684ec9d92 31 #define LCD_WIDTH 240
Damotclese 0:387684ec9d92 32 #define LCD_HEIGHT 320
Damotclese 0:387684ec9d92 33
Damotclese 0:387684ec9d92 34 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 35 // Allocate local data storage
Damotclese 0:387684ec9d92 36 //
Damotclese 0:387684ec9d92 37 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 38
Damotclese 0:387684ec9d92 39 // Describe a canned 2f AC spectrum consisting of 512 floating point samples
Damotclese 0:387684ec9d92 40 // Note that the values after the decimal point are not really needed, they
Damotclese 0:387684ec9d92 41 // get discarded when the spectrum values are plotted as integer values.
Damotclese 0:387684ec9d92 42 // These values were extracted after Spectra Processor decimated a spectrum
Damotclese 0:387684ec9d92 43 // of 65536 samples. We "normalize" the values to make them all positive and
Damotclese 0:387684ec9d92 44 // later we take the 512 samples and further "decimate" by averaging every
Damotclese 0:387684ec9d92 45 // two samples, resuling in 256 final values. The 256 values get plotted on
Damotclese 0:387684ec9d92 46 // to the LCD along the "width" of the display which is 320 pixels, leaving
Damotclese 0:387684ec9d92 47 // 64 pixels to the right of the plot free to be used for other things.
Damotclese 0:387684ec9d92 48 static float f_decimatedACSpectrum[] =
Damotclese 0:387684ec9d92 49 {
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Damotclese 0:387684ec9d92 114 } ;
Damotclese 0:387684ec9d92 115
Damotclese 0:387684ec9d92 116 // We will be using the LCD so instantiate an object locally
Damotclese 0:387684ec9d92 117 static LCD_DISCO_F429ZI st_lcd;
Damotclese 0:387684ec9d92 118
Damotclese 0:387684ec9d92 119 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 120 // MainProcessDecimatedSpectrum()
Damotclese 0:387684ec9d92 121 //
Damotclese 0:387684ec9d92 122 // This function will:
Damotclese 0:387684ec9d92 123 // o Search through the AC spectra and the DC spectra looking for
Damotclese 0:387684ec9d92 124 // the smallest and the highest numeric values in both
Damotclese 0:387684ec9d92 125 // o Convert the smallest number in to an absolute value by removing
Damotclese 0:387684ec9d92 126 // the sign bit using the ANSI absolute function
Damotclese 0:387684ec9d92 127 // o Add that now-positive smallest number to every sample in the
Damotclese 0:387684ec9d92 128 // AC and DC spectrums so that each value in the spectrums are
Damotclese 0:387684ec9d92 129 // positive values
Damotclese 0:387684ec9d92 130 // o Add that smallest value to the known largest value so that it
Damotclese 0:387684ec9d92 131 // agrees with the rest of the spectrum again
Damotclese 0:387684ec9d92 132 // o Compute a ratio derived by dividing the ;argest known value
Damotclese 0:387684ec9d92 133 // by the "width" of the screen
Damotclese 0:387684ec9d92 134 // o Goes through all 512 samples and averages them two by two,
Damotclese 0:387684ec9d92 135 // compressing the spectrum in place (in the same array of values)
Damotclese 0:387684ec9d92 136 // so that we end up with 256 samples which can fit on the LCD
Damotclese 0:387684ec9d92 137 // o Divides each of the 256 samples by the radio so that each of
Damotclese 0:387684ec9d92 138 // the samples will fit on the LCD
Damotclese 0:387684ec9d92 139 //
Damotclese 0:387684ec9d92 140 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 141 static void MainProcessDecimatedSpectrum(void)
Damotclese 0:387684ec9d92 142 {
Damotclese 0:387684ec9d92 143 uint16_t u16_searchLoop = 0;
Damotclese 0:387684ec9d92 144 uint32_t u32_sampleRatio = 0;
Damotclese 0:387684ec9d92 145 uint16_t u16_resultIndex = 0;
Damotclese 0:387684ec9d92 146 float f_smallNumber = 10000000.0f;
Damotclese 0:387684ec9d92 147 float f_largeNumber = 0.0f;
Damotclese 0:387684ec9d92 148
Damotclese 0:387684ec9d92 149 // Search through the AC spectrum for the smallest and the largest values
Damotclese 0:387684ec9d92 150 for (u16_searchLoop = 0; u16_searchLoop < 512; u16_searchLoop++)
Damotclese 0:387684ec9d92 151 {
Damotclese 0:387684ec9d92 152 if (f_decimatedACSpectrum[u16_searchLoop] < f_smallNumber)
Damotclese 0:387684ec9d92 153 {
Damotclese 0:387684ec9d92 154 // This value is the new lowest number
Damotclese 0:387684ec9d92 155 f_smallNumber = f_decimatedACSpectrum[u16_searchLoop];
Damotclese 0:387684ec9d92 156 }
Damotclese 0:387684ec9d92 157
Damotclese 0:387684ec9d92 158 if (f_decimatedACSpectrum[u16_searchLoop] > f_largeNumber)
Damotclese 0:387684ec9d92 159 {
Damotclese 0:387684ec9d92 160 // This value is the new highest number
Damotclese 0:387684ec9d92 161 f_largeNumber = f_decimatedACSpectrum[u16_searchLoop];
Damotclese 0:387684ec9d92 162 }
Damotclese 0:387684ec9d92 163 }
Damotclese 0:387684ec9d92 164
Damotclese 0:387684ec9d92 165 // Is the smallest number negative? We know that it is but we check
Damotclese 0:387684ec9d92 166 if (f_smallNumber < 0.0f)
Damotclese 0:387684ec9d92 167 {
Damotclese 0:387684ec9d92 168 // Make the value absolute so that it is positive
Damotclese 0:387684ec9d92 169 f_smallNumber = abs(f_smallNumber);
Damotclese 0:387684ec9d92 170 }
Damotclese 0:387684ec9d92 171
Damotclese 0:387684ec9d92 172 // To make all values positive, add the newly-derived positive value.
Damotclese 0:387684ec9d92 173 // This makes all numbers positive and ensures that the smallest
Damotclese 0:387684ec9d92 174 // value in the spectra is zero.
Damotclese 0:387684ec9d92 175 for (u16_searchLoop = 0; u16_searchLoop < 512; u16_searchLoop++)
Damotclese 0:387684ec9d92 176 {
Damotclese 0:387684ec9d92 177 f_decimatedACSpectrum[u16_searchLoop] += f_smallNumber;
Damotclese 0:387684ec9d92 178 }
Damotclese 0:387684ec9d92 179
Damotclese 0:387684ec9d92 180 // Also add the newly-positive number to our largest known value
Damotclese 0:387684ec9d92 181 f_largeNumber += f_smallNumber;
Damotclese 0:387684ec9d92 182
Damotclese 0:387684ec9d92 183 // Determine the ratio to use, the LCD screen is 240 by 320 so we
Damotclese 0:387684ec9d92 184 // take the highest number value in the spectra and divide by 240
Damotclese 0:387684ec9d92 185 // for the verticle plot, and we have 512 samples which will be
Damotclese 0:387684ec9d92 186 // plotted across the 320 by averaging every 2 samples to yield
Damotclese 0:387684ec9d92 187 // 256 horizontal positions. We plot with the screen laying on
Damotclese 0:387684ec9d92 188 // its side
Damotclese 0:387684ec9d92 189 u32_sampleRatio = (f_largeNumber / LCD_WIDTH);
Damotclese 0:387684ec9d92 190
Damotclese 0:387684ec9d92 191 // Go through each pairs of samples and average them and then
Damotclese 0:387684ec9d92 192 // divide the result by the ratio. Step through in twos
Damotclese 0:387684ec9d92 193 for (u16_searchLoop = 0; u16_searchLoop < 512; u16_searchLoop += 2, u16_resultIndex++)
Damotclese 0:387684ec9d92 194 {
Damotclese 0:387684ec9d92 195 // Take the next two samples and average them, putting the result
Damotclese 0:387684ec9d92 196 // in to the next result index of the same buffer we're processing
Damotclese 0:387684ec9d92 197 f_decimatedACSpectrum[u16_resultIndex] =
Damotclese 0:387684ec9d92 198 (f_decimatedACSpectrum[u16_searchLoop] + f_decimatedACSpectrum[u16_searchLoop]) / 2;
Damotclese 0:387684ec9d92 199
Damotclese 0:387684ec9d92 200 // Divide the sample value by the ratio
Damotclese 0:387684ec9d92 201 f_decimatedACSpectrum[u16_resultIndex] /= u32_sampleRatio;
Damotclese 0:387684ec9d92 202 }
Damotclese 0:387684ec9d92 203 }
Damotclese 0:387684ec9d92 204
Damotclese 0:387684ec9d92 205 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 206 // MainPlotFinalSpectrum()
Damotclese 0:387684ec9d92 207 //
Damotclese 0:387684ec9d92 208 // This function will step through the "normalized" and compressed AC
Damotclese 0:387684ec9d92 209 // and DC spectrums consisting of 256 samples and will plot a line from
Damotclese 0:387684ec9d92 210 // one sample to the next on the LCD
Damotclese 0:387684ec9d92 211 //
Damotclese 0:387684ec9d92 212 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 213 static void MainPlotFinalSpectrum(void)
Damotclese 0:387684ec9d92 214 {
Damotclese 0:387684ec9d92 215 uint16_t u16_searchLoop = 0;
Damotclese 0:387684ec9d92 216
Damotclese 0:387684ec9d92 217 // Plot the spectrum values, plotting a line from point to point
Damotclese 0:387684ec9d92 218 for (u16_searchLoop = 0; u16_searchLoop < ((512 / 2) - 1); u16_searchLoop++)
Damotclese 0:387684ec9d92 219 {
Damotclese 0:387684ec9d92 220 // Ensure that we actually fit. The sample should
Damotclese 0:387684ec9d92 221 if (f_decimatedACSpectrum[u16_searchLoop] <= LCD_WIDTH)
Damotclese 0:387684ec9d92 222 {
Damotclese 0:387684ec9d92 223 st_lcd.DrawLine(f_decimatedACSpectrum[u16_searchLoop], u16_searchLoop,
Damotclese 0:387684ec9d92 224 f_decimatedACSpectrum[u16_searchLoop + 1], u16_searchLoop + 1);
Damotclese 0:387684ec9d92 225 }
Damotclese 0:387684ec9d92 226 else
Damotclese 0:387684ec9d92 227 {
Damotclese 0:387684ec9d92 228 // Mathematically we topped-out past the maximum some how
Damotclese 0:387684ec9d92 229 st_lcd.DrawPixel(0, u16_searchLoop, LCD_COLOR_WHITE);
Damotclese 0:387684ec9d92 230 }
Damotclese 0:387684ec9d92 231 }
Damotclese 0:387684ec9d92 232 }
Damotclese 0:387684ec9d92 233
Damotclese 0:387684ec9d92 234 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 235 // MainInit()
Damotclese 0:387684ec9d92 236 //
Damotclese 0:387684ec9d92 237 // This function will:
Damotclese 0:387684ec9d92 238 // o Clear and initialize the LCD
Damotclese 0:387684ec9d92 239 // o Process the scanned decimated 2f AC and DC spectrums
Damotclese 0:387684ec9d92 240 // o Plot the processed spectrums
Damotclese 0:387684ec9d92 241 //
Damotclese 0:387684ec9d92 242 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 243 static void MainInit(void)
Damotclese 0:387684ec9d92 244 {
Damotclese 0:387684ec9d92 245 // Bring the LCD up and set its various colors
Damotclese 0:387684ec9d92 246 st_lcd.Clear(LCD_COLOR_BLACK);
Damotclese 0:387684ec9d92 247 st_lcd.SetBackColor(LCD_COLOR_BLACK);
Damotclese 0:387684ec9d92 248 st_lcd.SetTextColor(LCD_COLOR_WHITE);
Damotclese 0:387684ec9d92 249
Damotclese 0:387684ec9d92 250 // Process the decimated spectrum and then plot it
Damotclese 0:387684ec9d92 251 MainProcessDecimatedSpectrum();
Damotclese 0:387684ec9d92 252 MainPlotFinalSpectrum();
Damotclese 0:387684ec9d92 253 }
Damotclese 0:387684ec9d92 254
Damotclese 0:387684ec9d92 255 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 256 // MainThread()
Damotclese 0:387684ec9d92 257 //
Damotclese 0:387684ec9d92 258 // Called once a second.
Damotclese 0:387684ec9d92 259 //
Damotclese 0:387684ec9d92 260 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 261 static void MainThread(void)
Damotclese 0:387684ec9d92 262 {
Damotclese 0:387684ec9d92 263 }
Damotclese 0:387684ec9d92 264
Damotclese 0:387684ec9d92 265 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 266 // main()
Damotclese 0:387684ec9d92 267 //
Damotclese 0:387684ec9d92 268 // This is the main entry point which the operating system will load
Damotclese 0:387684ec9d92 269 // and execute on power-up after the OS completes its own start-up
Damotclese 0:387684ec9d92 270 // functionality.
Damotclese 0:387684ec9d92 271 //
Damotclese 0:387684ec9d92 272 // The function will:
Damotclese 0:387684ec9d92 273 // o Initialize this module's functionality
Damotclese 0:387684ec9d92 274 // o Launch the MODBUS CPUM thread
Damotclese 0:387684ec9d92 275 // o Launch the Modbus Tunnel thread
Damotclese 0:387684ec9d92 276 // o Enter in to a forever loop which should never terminate,
Damotclese 0:387684ec9d92 277 // waking up once a second to perform any additional desired
Damotclese 0:387684ec9d92 278 // functionality
Damotclese 0:387684ec9d92 279 //
Damotclese 0:387684ec9d92 280 // ----------------------------------------------------------------------
Damotclese 0:387684ec9d92 281 int main(void)
Damotclese 0:387684ec9d92 282 {
Damotclese 0:387684ec9d92 283 // Perform local module initialization, if any
Damotclese 0:387684ec9d92 284 MainInit();
Damotclese 0:387684ec9d92 285
Damotclese 0:387684ec9d92 286 // Initialize and launch the MODBUS CPUM thread
Damotclese 0:387684ec9d92 287 ModbusInit();
Damotclese 0:387684ec9d92 288
Damotclese 0:387684ec9d92 289 // Initialize and launch the MODBUS Tunnel thread
Damotclese 0:387684ec9d92 290 TunnelInit();
Damotclese 0:387684ec9d92 291
Damotclese 0:387684ec9d92 292 // Enter in to a forever loop which wakes up once a second
Damotclese 0:387684ec9d92 293 while (true)
Damotclese 0:387684ec9d92 294 {
Damotclese 0:387684ec9d92 295 // Sleep for one second
Damotclese 0:387684ec9d92 296 wait(1.0);
Damotclese 0:387684ec9d92 297
Damotclese 0:387684ec9d92 298 MainThread();
Damotclese 0:387684ec9d92 299 }
Damotclese 0:387684ec9d92 300 }
Damotclese 0:387684ec9d92 301
Damotclese 0:387684ec9d92 302 // End of file
Damotclese 0:387684ec9d92 303