Upload New File

main_incomplete.c

+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include "pico/stdlib.h"
+#include "hardware/gpio.h"
+#include "hardware/adc.h"
+#include "lib/fonts.h"
+#include "lib/st7735.h"
+
+//this task covers how to use the on-board temperature sensor in the RP2040 chip on the Raspberry pi Pico
+//it uses the analogue to digital converter (ADC) in the Pico to read the internal temperature of the RP2040 and
+//does the necessary data conversion to output the temperature of the chip
+
+//covers how to perform the required data processing to take the raw ADC output and convert it
+//into a voltage and then into temperature
+
+//the temperature sensor might not be calibrated so temperatures might differ in different
+//boards due to manufacturing inconsistencies
+//as such, if you will be using this in a serious project that requires an accurate temperature value,
+//I would recommend using an external sensor.
+
+
+int main() {
+
+    //Configure ADC
+    adc_init();
+
+    //Task starts here
+
+
+    //Enable temperature sensor
+
+    //Select fifth channel of the adc as the input (0 is considered as the first channel)
+
+    sleep_ms(1000);  // Wait 1 sec (not necessary)
+
+    // Initialise the screen (use ST7735_Init() function from the st7735 library)
+
+    //Infinite loop to update temperature display every second
+    while (1) {
+
+        //store the raw output value from the adc
+
+        const float conversion = 3.3f / (1 << 12);  //Use this conversion to go from raw value to voltage
+
+        //convert raw value to voltage (multiply conversion with the raw value)
+
+        //convert voltage to temperature value (temp = 27 - (voltage - 0.706) / 0.001721)
+
+        //create char buffer
+
+        //store temperature output on char buffer
+
+        //use the fillScreen(uint16_t color) to set the screen color
+
+        //use the ST7735_WriteString(uint16_t x, uint16_t y, const char* str, FontDef font, uint16_t color, uint16_t bgcolor) function to write the temperature to the screen
+
+        //can also use any other function from the library to display the temperature differently
+
+        sleep_ms(1000); //wait 1 sec
+    }
+}
\ No newline at end of file