void user_init(void)
{
uart_set_baud(0, 115200);
printf("SDK version:%s\n", sdk_system_get_sdk_version());
i2c_init(I2C_BUS, SCL_PIN, SDA_PIN, I2C_FREQ_100K);
hd44780_t lcd = {
.i2c_dev.bus = I2C_BUS,
.i2c_dev.addr = ADDR,
.font = HD44780_FONT_5X8,
.lines = 2,
.pins = {
.rs = 0,
.e = 2,
.d4 = 4,
.d5 = 5,
.d6 = 6,
.d7 = 7,
.bl = 3
},
.backlight = true
};
hd44780_init(&lcd);
hd44780_upload_character(&lcd, 0, char_data);
hd44780_upload_character(&lcd, 1, char_data + 8);
hd44780_gotoxy(&lcd, 0, 0);
hd44780_puts(&lcd, "\x08 Hello world!");
hd44780_gotoxy(&lcd, 0, 1);
hd44780_puts(&lcd, "\x09 ");
char time[16];
while (true)
{
hd44780_gotoxy(&lcd, 2, 1);
snprintf(time, 7, "%u ", sdk_system_get_time() / 1000000);
time[sizeof(time) - 1] = 0;
hd44780_puts(&lcd, time);
for (uint32_t i = 0; i < 1000; i++)
sdk_os_delay_us(1000);
}
}
void main(void) {
// lcd display
struct dev_hd44780_ctx lcd_ctx;
memset((void *)&lcd_ctx, 0x00, sizeof(struct dev_hd44780_ctx));
lcd_ctx.rs.port = &LCD_RS_PORT;
lcd_ctx.rs.pin = LCD_RS_PIN;
lcd_ctx.e.port = &LCD_E_PORT;
lcd_ctx.e.pin = LCD_E_PIN;
// setup data lines
for (uint8_t x = 0; x<4; x++) {
lcd_ctx.data[x].port = &LCD_DB_PORT;
lcd_ctx.data[x].pin = LCD_DB_PIN_FIRST + x;
}
// display specifics
lcd_ctx.lines = LCD_NUMBER_OF_LINES;
lcd_ctx.font = HD44780_FONT_5X8;
// initialize the device
hd44780_init(&lcd_ctx);
// clear the display initially
hd44780_clrscr(&lcd_ctx);
hd44780_goto(&lcd_ctx, 0x00);
hd44780_puts(&lcd_ctx, "Hello World");
// execution loop
for (;;);
}
int
main(int argc, char* argv[])
{
char buffer[80];
initialize();
hd44780_reset(HD44780_CMD_FUNC_SET |
HD44780_CMD_FUNC_2LINES);
hd44780_ir_write(HD44780_CMD_DISPLAY |
HD44780_CMD_DISPLAY_ON |
HD44780_CMD_DISPLAY_CURS_ON |
HD44780_CMD_DISPLAY_CURS_BLINK );
hd44780_wait_busy();
hd44780_ir_write(HD44780_CMD_EMS |
HD44780_CMD_EMS_INCR);
hd44780_wait_busy();
adc_calibrate();
adc_start();
while(1)
{
uint16_t internal_temp = adc_get_median(0),
external_temp = adc_get_median(1),
battery = adc_get_median(2),
reference = adc_get_median(3);
//trace_printf("%d %d %d\n", external_temp, internal_temp, reference);
uint32_t vdd = 3300u * *VREFINT_CAL / reference;
uint32_t internal_temp_volts = internal_temp * vdd / 0xfff,
external_temp_volts = external_temp * vdd / 0xfff,
battery_volts = battery * vdd / 0xfff;
int len = snprintf(buffer, sizeof(buffer), "%04x %04x %04x %04x",
internal_temp, external_temp, battery, reference);
//hd44780_clear_screen();
hd44780_goto_addr(0);
hd44780_puts(buffer, len);
len = snprintf(buffer, sizeof(buffer), "%ld.%03ld %ld.%03ld %ld.%03ld",
internal_temp_volts / 1000,
internal_temp_volts % 1000,
external_temp_volts / 1000,
external_temp_volts % 1000,
battery_volts / 1000,
battery_volts % 1000);
hd44780_goto_addr(64);
hd44780_puts(buffer, len);
int32_t internal_temp_celsius =
(int32_t)steinhart(internal_temp) - 273150;
int32_t external_temp_celsius =
hot_junction_temperature(internal_temp, external_temp, reference);
len = snprintf(buffer, sizeof(buffer), "%ld.%03d %ld.%05d",
internal_temp_celsius / 1000,
abs(internal_temp_celsius) % 1000,
external_temp_celsius / 100000,
abs(external_temp_celsius) % 100000);
hd44780_goto_addr(20);
hd44780_puts(buffer, len);
len = snprintf(buffer, sizeof(buffer), "%lu.%03lu",
vdd / 1000,
vdd % 1000);
hd44780_goto_addr(84);
hd44780_puts(buffer, len);
delay_1ms(1000);
}
}
