// ARM Mbed OS Mikroelektronika 7 Seg Click Test

// Copyright (C)2019-2020, Philip Munts, President, Munts AM Corp.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

// Hardware stack (bottom to top):
//
// Nucleo-F411RE
// Mikroelektronika Arduino Uno click Shield
// Mikroelektronika 7seg Click in mikroBUS socket 1

#include <mbed.h>
#include <appinfo.h>

static const uint8_t PermuteSegments[256] =
{
  0x00, 0x04, 0x02, 0x06, 0x08, 0x0C, 0x0A, 0x0E,
  0x10, 0x14, 0x12, 0x16, 0x18, 0x1C, 0x1A, 0x1E,
  0x20, 0x24, 0x22, 0x26, 0x28, 0x2C, 0x2A, 0x2E,
  0x30, 0x34, 0x32, 0x36, 0x38, 0x3C, 0x3A, 0x3E,
  0x40, 0x44, 0x42, 0x46, 0x48, 0x4C, 0x4A, 0x4E,
  0x50, 0x54, 0x52, 0x56, 0x58, 0x5C, 0x5A, 0x5E,
  0x60, 0x64, 0x62, 0x66, 0x68, 0x6C, 0x6A, 0x6E,
  0x70, 0x74, 0x72, 0x76, 0x78, 0x7C, 0x7A, 0x7E,
  0x80, 0x84, 0x82, 0x86, 0x88, 0x8C, 0x8A, 0x8E,
  0x90, 0x94, 0x92, 0x96, 0x98, 0x9C, 0x9A, 0x9E,
  0xA0, 0xA4, 0xA2, 0xA6, 0xA8, 0xAC, 0xAA, 0xAE,
  0xB0, 0xB4, 0xB2, 0xB6, 0xB8, 0xBC, 0xBA, 0xBE,
  0xC0, 0xC4, 0xC2, 0xC6, 0xC8, 0xCC, 0xCA, 0xCE,
  0xD0, 0xD4, 0xD2, 0xD6, 0xD8, 0xDC, 0xDA, 0xDE,
  0xE0, 0xE4, 0xE2, 0xE6, 0xE8, 0xEC, 0xEA, 0xEE,
  0xF0, 0xF4, 0xF2, 0xF6, 0xF8, 0xFC, 0xFA, 0xFE,
  0x01, 0x05, 0x03, 0x07, 0x09, 0x0D, 0x0B, 0x0F,
  0x11, 0x15, 0x13, 0x17, 0x19, 0x1D, 0x1B, 0x1F,
  0x21, 0x25, 0x23, 0x27, 0x29, 0x2D, 0x2B, 0x2F,
  0x31, 0x35, 0x33, 0x37, 0x39, 0x3D, 0x3B, 0x3F,
  0x41, 0x45, 0x43, 0x47, 0x49, 0x4D, 0x4B, 0x4F,
  0x51, 0x55, 0x53, 0x57, 0x59, 0x5D, 0x5B, 0x5F,
  0x61, 0x65, 0x63, 0x67, 0x69, 0x6D, 0x6B, 0x6F,
  0x71, 0x75, 0x73, 0x77, 0x79, 0x7D, 0x7B, 0x7F,
  0x81, 0x85, 0x83, 0x87, 0x89, 0x8D, 0x8B, 0x8F,
  0x91, 0x95, 0x93, 0x97, 0x99, 0x9D, 0x9B, 0x9F,
  0xA1, 0xA5, 0xA3, 0xA7, 0xA9, 0xAD, 0xAB, 0xAF,
  0xB1, 0xB5, 0xB3, 0xB7, 0xB9, 0xBD, 0xBB, 0xBF,
  0xC1, 0xC5, 0xC3, 0xC7, 0xC9, 0xCD, 0xCB, 0xCF,
  0xD1, 0xD5, 0xD3, 0xD7, 0xD9, 0xDD, 0xDB, 0xDF,
  0xE1, 0xE5, 0xE3, 0xE7, 0xE9, 0xED, 0xEB, 0xEF,
  0xF1, 0xF5, 0xF3, 0xF7, 0xF9, 0xFD, 0xFB, 0xFF
};

// The following glyph pattern values came from:
// https://en.wikipedia.org/wiki/Seven-segment_display

static const uint8_t GlyphTable[16] =
{
  0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07,
  0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71
};

static DigitalOut Click1RST(A3, true);
static DigitalOut Click1PWM(D6, true);
static DigitalOut Click1CS(D10, true);
static SPI Click1SPI(D11, D12, D13);

static void display_write_raw(uint8_t *buf)
{
  Click1CS = false;
  Click1SPI.write((char *) buf, 2, NULL, 0);
  Click1CS = true;
}

static void display_init(void)
{
  uint8_t outbuf[2];

  Click1SPI.format(8, 0);
  Click1SPI.frequency(4000000);

  memset(outbuf, 0, sizeof(outbuf));
  display_write_raw(outbuf);
}

static void display_write_decimal(unsigned n, bool leftdp = false,
  bool rightdp = false, bool blankhi = false, bool blanklo = false)
{
  uint8_t outbuf[2] = { 0, 0 };

  if (n > 99) return;

  uint8_t hidigit = n / 10;
  uint8_t lodigit = n % 10;

  if ((lodigit != 0) || !blanklo)
    outbuf[0] = PermuteSegments[GlyphTable[lodigit]];

  if ((hidigit != 0) || !blankhi)
    outbuf[1] = PermuteSegments[GlyphTable[hidigit]];

  if (rightdp)
    outbuf[0] |= 1;

  if (leftdp)
    outbuf[1] |= 1;

  display_write_raw(outbuf);
}

BufferedSerial UART(SERIAL_TX, SERIAL_RX, 115200);

int main(void)
{
  int i;

  MUNTS::AppInfo::Banner("Mikroelektronika 7 Seg Click Test");

  display_init();

  for (;;)
  {
    for (i = 0; i < 100; i++)
    {
      display_write_decimal(i, false, false, true, true);
      ThisThread::sleep_for(100ms);
    }

    ThisThread::sleep_for(1s);

    for (i = 99; i >= 0; i--)
    {
      display_write_decimal(i, false, false, true, true);
      ThisThread::sleep_for(100ms);
    }

    ThisThread::sleep_for(1s);
  }
}