gistfile1.txt

#ifdef TEST
#include <stdint.h>
#include <stdio.h>

uint8_t LCDDR0=0,
        LCDDR1=0,
        LCDDR2=0,
        LCDDR3=0,
        LCDDR4=0,
        LCDDR5=0,
        LCDDR6=0,
        LCDDR7=0;
#endif

struct {
    uint8_t digits[3], /* 0-9, 10->disabled */
            warning:1,  /* 022 */
            thermometer:1, /* 021 */
            window:1,   /* 020 */
            percent:1,  /* 019 */
            degrees:1,  /* 016 */
            comma:1,    /* 120 */
            rel:1,      /* 116 */
            bat:2, /* 0-3 */
            bat_frame:1;/* 118 */
} lcd_st;

#define SEG(x) (1<<(x))
#define ALL    0x7F
uint8_t digit_patterns[11] = {
    /* segments numbered left to right, top to bottom:
     * /-0-\
     * 1   2
     * +-3-+
     * 4   5
     * \-6-/
     */
    [0] = ALL - SEG(3),
    [1] = SEG(2) + SEG(5),
    [2] = ALL - SEG(1) - SEG(5),
    [3] = ALL - SEG(1) - SEG(4),
    [4] = SEG(1) + SEG(2) + SEG(3) + SEG(5),
    [5] = ALL - SEG(2) - SEG(4),
    [6] = ALL - SEG(2),
    [7] = SEG(0) + SEG(2) + SEG(5),
    [8] = ALL,
    [9] = ALL - SEG(4),
    [10]= 0
};
#undef SEG
#undef ALL

#define REG(v, s) ((!!(v))<<(s))
void update_display(void) {
    union {
        struct {
            uint8_t s6:1,
                    s5:1,
                    s4:1,
                    s3:1,
                    s2:1,
                    s1:1,
                    s0:1;
        };
        uint8_t pat;
    } d0 = {.pat=digit_patterns[lcd_st.digits[0]]},
      d1 = {.pat=digit_patterns[lcd_st.digits[0]]},
      d2 = {.pat=digit_patterns[lcd_st.digits[0]]};
    LCDDR0 = REG(d0.s1, 0) | REG(d0.s0, 1) | REG(d0.s2, 2)
        | REG(d1.s1, 3) | REG(d1.s0, 4) | REG(d1.s2, 5)
        | REG(d2.s1, 6) | REG(d2.s0, 7);
    LCDDR2 = REG(lcd_st.degrees, 0)
        | REG(lcd_st.bat>0, 1)
        | REG(lcd_st.bat>1, 2)
        | REG(lcd_st.percent, 3)
        | REG(lcd_st.window, 4)
        | REG(lcd_st.thermometer, 5)
        | REG(lcd_st.warning, 6);
    LCDDR5 = REG(d0.s4, 0) | REG(d0.s3, 1) | REG(d0.s5, 2)
        | REG(d1.s4, 3) | REG(d1.s3, 4) | REG(d1.s5, 5)
        | REG(d2.s4, 6) | REG(d2.s3, 7);
    LCDDR7 = REG(d2.s6, 3) | REG(d1.s6, 5) | REG(d0.s6, 6)
        | REG(lcd_st.rel, 0)
        | REG(lcd_st.bat>2, 1)
        | REG(lcd_st.window, 2)
        | REG(lcd_st.comma, 4);
}
#undef REG

#ifdef TEST
static inline void print_regs(void) {
    update_display();
    printf("digits: %d%d%d warning: %d thermometer: %d window: %d percent: %d degrees: %d comma: %d rel: %d bat: %d bat_frame: %d\n",
            lcd_st.digits[0],
            lcd_st.digits[1],
            lcd_st.digits[2],
            lcd_st.warning,
            lcd_st.thermometer,
            lcd_st.window,
            lcd_st.percent,
            lcd_st.degrees,
            lcd_st.comma,
            lcd_st.rel,
            lcd_st.bat,
            lcd_st.bat_frame);
    printf("%.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x\n", LCDDR0, LCDDR1, LCDDR2, LCDDR3, LCDDR4, LCDDR5, LCDDR6, LCDDR7);
    printf("----\n\n");
}

int main(void) {
    lcd_st.bat_frame = 1;
    printf("BAT test\n");
    for (uint8_t i=0; i<4; i++) {
        lcd_st.bat = i;
        print_regs();
    }
    lcd_st.bat = 0;

    printf("DIGIT test\n");
    lcd_st.digits[0] = 1;
    print_regs();
    lcd_st.digits[0] = 0;
    lcd_st.digits[1] = 1;
    print_regs();
    lcd_st.digits[1] = 0;
    lcd_st.digits[2] = 1;
    print_regs();
    lcd_st.digits[2] = 0;

    for (int j=0; j<3; j++) {
        printf("DIGIT %d SEGMENT test\n", j);
        for (int i=0; i<10; i++) {
            lcd_st.digits[j] = i;
            print_regs();
        }
        lcd_st.digits[j] = 0;
    }
}
#endif