init m05e01

module05/ex01/main.c

@@ -0,0 +1,32 @@
+#include "header.h"
+
+// 1.1.7 : AVCC is the supply voltage pin for the A/D Converter, PC3:0, and ADC7:6
+// 1.1.8 : AREF is the analog reference pin for the A/D Converter
+
+#define ADC_PRESCALER	8
+
+void int_to_hex_string(uint64_t value, char *out, uint8_t num_digits) {				// num_digits : number of digit of the output, ex 2 for 3FF (1023) -> FF
+    for (uint8_t i = 0; i < num_digits; ++i) {
+        uint8_t shift = (num_digits - 1 - i) * 4;
+        out[i] = INT_TO_HEX_CHAR((value >> shift) & 0x0F);
+    }
+    out[num_digits] = '\0';
+}
+
+// description
+int main() {
+    char buffer[4];
+	SREG |= ENABLE_GLOBAL_INTERRUPT;												// 7.3.1 : Status Register, bit 7 : I – Global Interrupt Enable
+	uart_init();
+	adc_init(ADC_PRESCALER);
+
+	while(1) {
+        uint16_t value = adc_read(0);												// Read from ADC0 (A0)
+		int_to_hex_string(value, buffer, 3);
+        uart_printstr_endl(buffer);
+        _delay_ms(20);																// Wait 20ms
+	}
+}
+
+// ISR(ADC_vect) {		// Table 12-6 : interrupt vector for ADC Conversion Complete
+// }