/*
* display.cpp
*
* Created on: 30 Nov 2020
* Author: mike
*/
#include <stdio.h>
#include "main.h"
#include "display.h"
#include "switches.h"
#include "nvram.h"
#include <cstring>
#include <cstdlib>
#include "libOLED/stm32_halDisplay.H"
#include "libOLED/fontclass.H"
#include "libOLED/displayDial.H"
#include "libPlx/displayInfo.H"
#include "libOLED/ap_math.h"
#include "libSmallPrintf/small_printf.h"
#include "splash.H"
namespace
{
int const WIDTH = 128;
int const HEIGHT = 64;
int const DISPLAY_RAMWIDTH = 132;
}
uint8_t displayBuffer[2][dataSize(WIDTH, HEIGHT)];
stm32_halDisplay_t displays[MAX_DISPLAYS] =
{stm32_halDisplay_t(WIDTH, HEIGHT, DISPLAY_RAMWIDTH, displayBuffer[0],
&hspi1,
SPI_CD_GPIO_Port,
SPI_CD_Pin,
SPI_RESET_GPIO_Port,
SPI_RESET_Pin,
SPI_NSS1_GPIO_Port,
SPI_NSS1_Pin),
stm32_halDisplay_t(WIDTH, HEIGHT,
DISPLAY_RAMWIDTH,
displayBuffer[1],
&hspi1,
SPI_CD_GPIO_Port,
SPI_CD_Pin,
SPI_RESET_GPIO_Port,
SPI_RESET_Pin,
SPI_NSS2_GPIO_Port,
SPI_NSS2_Pin)};
displayDial_t dials[MAX_DISPLAYS] =
{displayFullDial_t(displays[0]), displayFullDial_t(displays[1])};
#if defined __cplusplus
extern "C"
{
#endif
static void
showMinMax(display_t &display, uint8_t dp_pos, int16_t int_min,
uint16_t int_max)
{
const char padding[] = " ";
// left justified display of minimum
int8_t width = display.fontSigDigits(small_font, 0, 0, 0, dp_pos, int_min, WHITE);
// pad with spaces if fewer than 6 characters are used.
if (width != 6)
display.printString(small_font, padding, 6 - width, WHITE);
display.gotoxy(0, 8);
display.printString(small_font, "Min", 3, WHITE);
// right justified display of maximum
width = display.fontSigDigits(small_font, 120, 0, 1, dp_pos, int_max, WHITE);
// right justified display of maximum : pad spaces to left
if (width != 6)
display.printString(small_font, padding, 6 - width, WHITE);
display.gotoxy(110, 8);
display.printString(small_font, "Max", 3, WHITE);
}
void
cc_init()
{
for (auto i = 0; i < MAX_DISPLAYS; i++)
{
display_t &display = displays[i];
if (i == 0)
display.reset();
display.init();
display.clearDisplay(BLACK);
displaySplash(display);
display.gotoxy(8, 32);
display.printString(large_font, i == 0 ? "1" : "2", 1, BLACK);
display.display();
}
HAL_Delay(1000);
for (auto i = 0; i < MAX_DISPLAYS; i++)
{
display_t &display = displays[i];
display.clearDisplay(BLACK);
display.setPixelMode(WHITE);
display.display();
context_t &context = contexts[i];
resetDialTimer(i);
context.dial1 = -1;
context.OldObservation = nullObs;
context.knobPos = -1; // indicate it is initialised
}
}
// Check to see if there is an observation/instance in the dynamic data array
// that matches the current observation/instance in the NVRAM
void
cc_check_nvram(int dialIndex)
{
if (dialIndex < 0 && dialIndex > MAX_DISPLAYS)
return;
// algorithm only works when there is a vector of observations
context_t &context = contexts[dialIndex];
// check for timer timeout using systick timer
if ((context.dial_timer != 0) && (HAL_GetTick() > context.dial_timer))
{
contexts[dialIndex].dial_timer = 0; // used timer timeout
// use dialIndex+1 as tag for data : always non-zero.
#if defined SEMIHOSTING
printf("check %d\n", dialIndex);
#endif
nvram_info_t *dial_nvram = find_nvram_data(dialIndex + 1);
// initial read operation if knobPos < 0
if (context.knobPos < 0)
{
if (dial_nvram)
{
// found NVRAM content
context.knobPos = dial_nvram->data.pos;
}
else
// not found in NVRAM, so use default
{
context.knobPos = dialIndex;
}
return;
}
// dont save dial info for invalid data
if (!isValid(context.knobPos))
return;
// is this a change since the last timeout ?
if (!dial_nvram || context.knobPos != dial_nvram->data.pos)
{
// store the observation and instance in the NVRAM, not dial position.
nvram_info_t curr_val;
curr_val.u32 = 0;
curr_val.data.pos = context.knobPos;
curr_val.data.tag = dialIndex + 1;
#if defined SEMIHOSTING
printf("saving %d\n", dialIndex);
#endif
write_nvram_data(curr_val);
}
}
}
int
cc_display(int dialIndex, int suppressIndex)
{
if (dialIndex < 0 && dialIndex > MAX_DISPLAYS)
return -1;
context_t &context = contexts[dialIndex];
displayDial_t &dial = dials[dialIndex];
stm32_halDisplay_t &display = displays[dialIndex];
int itemIndex = context.knobPos;
char buff[10];
int i;
const char *msg;
int len;
// check for startup phase
if (itemIndex < 0)
{
display.clearDisplay(BLACK);
i = small_sprintf(buff, "Wait");
display.gotoxy(64 - i * 4, 48);
display.printString(large_font, buff, i, WHITE);
display.display();
return -1;
}
// check for item suppression
if (itemIndex == suppressIndex)
{
context.dial1 = -1;
context.OldObservation = nullObs;
display.clearDisplay(BLACK);
i = small_sprintf(buff, "Supp-%02d", itemIndex);
display.gotoxy(64 - i * 4, 48);
display.printString(large_font, buff, i, WHITE);
display.display();
return -1; // we suppressed this display
}
// check for item validity
if (!isValid(itemIndex))
{
context.dial1 = -1;
context.OldObservation = nullObs;
display.clearDisplay(BLACK);
i = small_sprintf(buff, "Inval-%02d", itemIndex);
display.gotoxy(64 - i * 4, 48);
display.printString(large_font, buff, i, WHITE);
display.display();
return itemIndex;
}
// clear startup display off the screen
if (context.OldObservation.Obs == -1)
display.clearDisplay(BLACK);
int DataVal = Info[itemIndex].data; // data reading
PLX_Observations Observation = Info[itemIndex].observation.Obs;
uint8_t Instance = Info[itemIndex].observation.Instance;
// now to convert the readings and format strings
// find out limits
// if the user presses the dial then reset min/max to current value
if (push_pos[dialIndex] == 1)
{
Info[itemIndex].Max = DataVal;
Info[itemIndex].Min = DataVal; // 12 bit max value
}
// detect change in observation being displayed, reset the dial
if (Observation < PLX_MAX_OBS)
{
if (Observation != context.OldObservation.Obs || Instance != context.OldObservation.Instance)
{
display.clearDisplay(BLACK);
dial.draw_scale(DisplayInfo[Observation].Low,
DisplayInfo[Observation].High, 12, 1,
DisplayInfo[Observation].TickScale);
dial.draw_limits();
msg = DisplayInfo[Observation].name;
len = 7;
int len1 = Instance > 0 ? len - 1 : len;
for (i = 0; i < len1 && msg[i]; i++)
{
buff[i] = msg[i];
}
if (Instance > 0 && i < len)
{
buff[i++] = Instance + '1';
}
display.gotoxy(64 - i * 4, 48);
display.printString(large_font, buff, i, WHITE);
context.OldObservation.Obs = Observation;
context.OldObservation.Instance = Instance;
context.dial1 = -1; // do not display old needle, cleared screen
display.display();
}
}
if (Info[itemIndex].updated)
{
Info[itemIndex].updated = 0;
double max_rdg;
double min_rdg;
double cur_rdg;
int int_rdg;
int int_max;
int int_min;
max_rdg = ConveriMFDRaw2Data((enum PLX_Observations)Observation, DisplayInfo[Observation].Units,
Info[itemIndex].Max);
min_rdg = ConveriMFDRaw2Data((enum PLX_Observations)Observation, DisplayInfo[Observation].Units,
Info[itemIndex].Min);
cur_rdg = ConveriMFDRaw2Data((enum PLX_Observations)Observation, DisplayInfo[Observation].Units,
Info[itemIndex].data);
int dp_pos; // where to print the decimal place
float scale = 1.0;
switch (DisplayInfo[Observation].DP)
{
default:
case 0:
scale = 1.0;
dp_pos = display_t::NO_DECIMAL;
break;
case 1:
scale = 10.0;
dp_pos = 1;
break;
case 2:
scale = 100.0;
dp_pos = 2;
break;
}
int_rdg = (int)(cur_rdg * scale);
int_max = (int)(max_rdg * scale);
int_min = (int)(min_rdg * scale);
cur_rdg -= DisplayInfo[Observation].Low;
cur_rdg = ap_math::SINE_STEPS * cur_rdg / (DisplayInfo[Observation].High - DisplayInfo[Observation].Low);
context.dial0 = (int)cur_rdg;
display.gotoxy(32, 28);
display.fontDigits(large_font, 4, dp_pos, int_rdg, WHITE);
display.printString(small_font, DisplayInfo[Observation].suffix,
strlen(DisplayInfo[Observation].suffix));
display.printString(small_font, " ",
3 - strlen(DisplayInfo[Observation].suffix));
// print value overlaid by needle
/* old needle un-draw */
if (context.dial1 >= 0)
{
dial.draw_needle(context.dial1);
}
dial.draw_needle(context.dial0);
context.dial1 = context.dial0;
showMinMax(display, dp_pos, int_min, int_max);
}
else
{
if (Info[itemIndex].lastUpdated && ((HAL_GetTick() - Info[itemIndex].lastUpdated) > 1000))
{
context.OldObservation = nullObs; // force a redraw on next update
Info[itemIndex].lastUpdated = 0; // and stop further timeouts.
}
}
display.gotoxy(0, 32);
// display BT connection status
display.printString(small_font, btConnected() ? "\x81" : " ", 1);
display.display();
return itemIndex;
}
}