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draw useful info on screen

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This commit is contained in:
Alessandro Mauri 2026-04-19 16:46:54 +02:00
parent 1ba352af4e
commit 2c82d8d42e
1 changed files with 33 additions and 23 deletions
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56
fw/main.c
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@ -24,6 +24,8 @@
#define NTC_ADC_CHANNEL ANALOG_2 // PA2
#define TEMP_ADC_CHANNEL ANALOG_3 // PA3
#define FRAME_TIME_MS 41 // roughly 24 fps
// constants
// LUT for converting NTC readings to degrees kelvin
// Nominal: 1kOhm, Beta: 3380, Step: 64
@ -66,13 +68,6 @@ static inline int16_t get_current_ma(uint16_t adc_reading)
}
// convert the raw tip reading from the adc to a temperature in kelvin
static inline int16_t get_tip_temp_k(uint16_t adc_reading, int16_t cold_temp_k)
{
return 0;
}
void print_i2c_device(uint8_t addr)
{
printf("Device found at 0x%02X\n", addr);
@ -106,13 +101,6 @@ void handle_usbfs_input(int numbytes, uint8_t *data)
"\ts : scan I2C bus\n"
);
break;
case 'd':
printf("Initializing display...\n");
u8g2 = display_init();
u8g2_ClearBuffer(u8g2);
u8g2_DrawBox(u8g2, 0, 0, 20, 10);
u8g2_SendBuffer(u8g2);
break;
case 's':
printf("Scanning I2C bus...\n");
i2c_scan(I2C_TARGET, print_i2c_device);
@ -208,18 +196,40 @@ __attribute__((noreturn)) int main(void)
Delay_Ms(500);
unsigned int count = 0;
u8g2 = display_init();
for (uint32_t x = 0; true ; x++) {
for (;;) {
poll_input(); // usb
if ((x % 100) == 0) {
uint16_t vbus_mv = ((u32)funAnalogRead(VBUS_ADC_CHANNEL)*VCC_MV*11)/4096;
uint16_t current_ma = get_current_ma(funAnalogRead(CURRENT_ADC_CHANNEL));
int16_t temp_k = get_temp_k(funAnalogRead(NTC_ADC_CHANNEL));
uint16_t tip_mv = ((u32)funAnalogRead(TEMP_ADC_CHANNEL)*VCC_MV)/4096;
u32 start = funSysTick32();
printf("[%d]: VBUS=%d, CURRENT=%d, TEMP=%d, TIP=%d, COUNTER=%d\n", count++, vbus_mv, current_ma, temp_k, tip_mv, encoder);
uint16_t vbus_mv = ((u32)funAnalogRead(VBUS_ADC_CHANNEL)*VCC_MV*11)/4096;
uint16_t current_ma = get_current_ma(funAnalogRead(CURRENT_ADC_CHANNEL));
int16_t temp_k = get_temp_k(funAnalogRead(NTC_ADC_CHANNEL));
uint16_t tip_mv = ((u32)funAnalogRead(TEMP_ADC_CHANNEL)*VCC_MV)/4096;
u8g2_ClearBuffer(u8g2);
u8g2_SetBitmapMode(u8g2, 1);
u8g2_SetFontMode(u8g2, 1);
u8g2_SetFont(u8g2, u8g2_font_5x8_tr);
u8g2_DrawStr(u8g2, 0, 7, "TIP:");
u8g2_DrawStr(u8g2, 20, 7, u8x8_u16toa(tip_mv, 4));
u8g2_DrawStr(u8g2, 0, 15, "VBUS:");
u8g2_DrawStr(u8g2, 25, 15, u8x8_u16toa(vbus_mv, 4));
u8g2_DrawLine(u8g2, 62, 19, 62, 0);
u8g2_DrawStr(u8g2, 71, 6, "TEMP:");
u8g2_DrawStr(u8g2, 96, 6, u8x8_u16toa(temp_k, 2));
u8g2_DrawFrame(u8g2, 0, 22, 128, 10);
encoder = encoder < -61 ? -61 : (encoder > 61 ? 61 : encoder);
u8g2_DrawBox(u8g2, 61+encoder, 23, 4, 8);
u8g2_SendBuffer(u8g2);
printf("VBUS=%d, CURRENT=%d, TEMP=%d, TIP=%d, COUNTER=%d\n", vbus_mv, current_ma, temp_k, tip_mv, encoder);
u32 elapsed = funSysTick32() - start;
if (elapsed < Ticks_from_Ms(FRAME_TIME_MS)) {
DelaySysTick(Ticks_from_Ms(FRAME_TIME_MS) - elapsed);
} else {
printf("Frame took too long: %ld ms\n", elapsed/DELAY_MS_TIME);
}
Delay_Ms(1);
}
}