init mod06

This commit is contained in:
hugogogo
2025-03-15 16:12:09 +01:00
parent 92aa850fb4
commit 8fef07135a
2 changed files with 10 additions and 33 deletions

View File

@@ -21,18 +21,9 @@ extern volatile uint8_t adc_channel;
// PROTOTYPES
//
// main.c
// timer.c
void timer_1B_init();
// math.c
void int_to_hex_string(uint64_t value, char *out, uint8_t num_digits);
// adc.c
void adc_init(uint8_t prescaler_value);
uint16_t adc_read(uint8_t channel);
// uart.c
void uart_init();
void uart_tx(char c);
void uart_printstr(const char* str);
void uart_printstr_endl(const char* str);
void i2c_init(void);
void i2c_start(void);
void i2c_stop(void);
//
// MACROS

View File

@@ -1,29 +1,15 @@
#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
// 24.4 : frequency needs to be between 50kHz and 200kHz, for less than 10bits accuracy it can be >200kHz
// -> Frequence_ADC = Frequance_CPU / Prescaler (Fadc = Fcpu/P):
// - P = 2 -> Fadc = 16,000,000 / 2 = 8,000,000 = 8MHz
// - P = 4 -> Fadc = 16,000,000 / 4 = 4,000,000 = 4MHz
// - P = 8 -> Fadc = 16,000,000 / 8 = 2,000,000 = 2MHz
// - P = 16 -> Fadc = 16,000,000 / 16 = 1,000,000 = 1MHz
// - P = 32 -> Fadc = 16,000,000 / 32 = 500,000 = 500KHz
// - P = 64 -> Fadc = 16,000,000 / 64 = 250,000 = 250KHz -> OK
// - P = 128 -> Fadc = 16,000,000 / 128 = 125,000 = 125KHz -> OK
void i2c_init(void) {
}
void i2c_start(void) {
}
void i2c_stop(void) {
}
#define ADC_PRESCALER 64 // Table 24-5 : can only be 2, 4, 8, 16, 32, 64, or 128
volatile uint8_t adc_channel = 0;
// read potentiometer value and print it in uart as hexadecimal 2-number
// 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);
timer_1B_init();
while(1);
}