Interpolating temperature points and displaying them works

This commit is contained in:
Sebastian 2016-12-09 01:35:15 +01:00
commit 585b8875a4
5 changed files with 160 additions and 0 deletions

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.gitignore vendored Normal file
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/bin

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.gitmodules vendored Normal file
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[submodule "avr-st7735"]
path = avr-st7735
url = git@github.com:LongHairedHacker/avr-st7735.git

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Makefile Normal file
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AVRMCU ?= atmega8
F_CPU ?= 16000000
ISPPORT ?= /dev/kaboard
VERSION = 0.1
# ST7735 stuff
HEADERS = avr-st7735/include/spi.h
HEADERS += avr-st7735/include/st7735.h avr-st7735/include/st7735initcmds.h
HEADERS += avr-st7735/include/st7735_gfx.h avr-st7735/include/st7735_font.h
HEADERS += avr-st7735/images/logo_bw.h avr-st7735/fonts/free_sans.h
SRC = avr-st7735/spi.c avr-st7735/st7735.c
SRC += avr-st7735/st7735_gfx.c avr-st7735/st7735_font.c
# Local stuff
SRC += main.c
TARGET = reflow-firmware
OBJDIR = bin
CC = avr-gcc
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size
SRC_TMP = $(subst ../,,$(SRC))
OBJ = $(SRC_TMP:%.c=$(OBJDIR)/$(AVRMCU)/%.o)
CFLAGS = -I avr-st7735/include -I avr-st7735/images -I avr-st7735/fonts
CFLAGS += -Os -Wall -Wstrict-prototypes
CFLAGS += -ffunction-sections -fdata-sections
CFLAGS += -fshort-enums -fpack-struct -funsigned-char -funsigned-bitfields
CFLAGS += -mmcu=$(AVRMCU) -DF_CPU=$(F_CPU)UL -DVERSION=$(VERSION)
LDFLAGS = -mmcu=$(AVRMCU) -Wl,--gc-sections
all: start $(OBJDIR)/$(AVRMCU)/$(TARGET).hex size
@echo ":: Done !"
start:
@echo "Reflow Firmware $(VERSION)"
@echo "=========================="
@echo ":: Building for $(AVRMCU)"
@echo ":: MCU operating frequency is $(F_CPU)Hz"
images/logo.h : images/logo.png utils/img_convert.py
python3 utils/img_convert.py $< $@
images/logo_bw.h : images/logo_bw.png utils/img_convert_mono.py
python3 utils/img_convert_mono.py $< $@
$(OBJDIR)/$(AVRMCU)/%.o : %.c $(HEADERS) Makefile
@mkdir -p $$(dirname $@)
$(CC) $(CFLAGS) -c $< -o $@
$(OBJDIR)/$(AVRMCU)/$(TARGET).elf : $(OBJ)
$(CC) $(LDFLAGS) $+ -o $@
$(OBJDIR)/$(AVRMCU)/$(TARGET).hex : $(OBJDIR)/$(AVRMCU)/$(TARGET).elf
$(OBJCOPY) -O ihex $< $@
size : $(OBJDIR)/$(AVRMCU)/$(TARGET).elf
@echo
@$(SIZE) --mcu=$(AVRMCU) -C $(OBJDIR)/$(AVRMCU)/$(TARGET).elf
@echo
clean :
@rm -rf $(OBJDIR)
flash : all
avrdude -c arduino \
-p $(AVRMCU) -P $(ISPPORT) \
-U flash:w:$(OBJDIR)/$(AVRMCU)/$(TARGET).hex
test : flash
screen $(ISPPORT) 38400

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avr-st7735 Submodule

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Subproject commit 3d03fa4038aea6ef89e1b17c6da0e9732284d912

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main.c Normal file
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#include<avr/io.h>
#include<util/delay.h>
#include "spi.h"
#include "st7735.h"
#include "st7735_gfx.h"
#include "st7735_font.h"
#include "logo_bw.h"
#include "free_sans.h"
uint8_t profile_point_count = 5;
uint16_t profile[5][2] = {
{0, 22},
{90, 150},
{180, 180},
{210, 210},
{270, 180},
};
uint16_t interpolate_profile(uint16_t t) {
if(t > profile[profile_point_count -1][0]) {
return profile[profile_point_count -1][1] * 100;
}
uint8_t pos;
for(pos = 0; pos < profile_point_count; pos++) {
if(profile[pos][0] > t) {
break;
}
}
int16_t time_diff = profile[pos][0] - profile[pos - 1][0];
int16_t tmp_diff = (profile[pos][1] - profile[pos - 1][1]) * 100;
int16_t gradient = tmp_diff / time_diff;
return gradient * (t - profile[pos - 1][0]) + profile[pos - 1][1] * 100;
}
void splash_screen(void) {
st7735_fill_rect(0, 0, 160, 128, ST7735_COLOR_BLACK);
st7735_draw_mono_bitmap(16, 4, &logo_bw, ST7735_COLOR_WHITE, ST7735_COLOR_BLACK);
_delay_ms(2000);
}
void draw_plot_template(void) {
st7735_fill_rect(0, 0, 160, 128, ST7735_COLOR_BLACK);
for(uint8_t y = 28; y < 128; y += 10) {
st7735_draw_fast_hline(0, y, 160, st7735_color(128,128,128));
}
for(uint8_t x = 10; x < 160; x+=10) {
st7735_draw_fast_vline(x, 20, 128, st7735_color(128,128,128));
}
for(uint8_t t = 0; t < 160; t++) {
uint16_t temp = interpolate_profile(t * 2);
st7735_draw_pixel(t, 127 - (temp / 250), ST7735_COLOR_CYAN);
}
}
int main(void) {
spi_init();
st7735_init();
st7735_set_orientation(ST7735_LANDSCAPE);
splash_screen();
draw_plot_template();
while(1);
}