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setup mod02 ex00 and oneline comments

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hugo LAMY
2025-03-06 16:23:18 +01:00
parent 6ec379e1ae
commit ebb578db5f
6 changed files with 86 additions and 28 deletions
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1
README.md
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@@ -7,6 +7,7 @@
- avrdude 6.3 doc : https://download-mirror.savannah.gnu.org/releases/avrdude/avrdude-doc-6.3.pdf
- embedded systems : https://en.wikibooks.org/wiki/Embedded_Systems/Atmel_AVR
- timers for newbies : https://qiriro.com/bme6163/static_files/notes/L3/Newbie%27s%20Guide%20to%20AVR%20Timers.pdf
- timer and pwm : https://wolles-elektronikkiste.de/en/timer-and-pwm-part-2-16-bit-timer1
## m00ex00

11
module01/ex01/main.c
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@@ -68,16 +68,11 @@
int main() {
MODE_OUTPUT(LED2);
TCCR1B |= (1 << WGM12); // set timer in CTC (Clear Time on Compare) mode
// -> Table 16-4 : use bit WGM12 to set mode ctc
// -> 16.11.2 : bit WGM12 is located in register TCCR1B
TCCR1B |= (1 << WGM12); // Table 16-4 : set timer in CTC (Clear Time on Compare) mode, use bit WGM12, located in register TCCR1B (16.11.2)
TCCR1A |= (1 << COM1A0); // enable timer 1 Compare Output channel A in toggle mode
// -> Table 14-3 : alternate functions for PORTB1 is OC1A (Timer/Counter1 Output Compare Match A Output)
// -> 14.3.1 : OC1A/PCINT1 – Port B, Bit 1
TCCR1A |= (1 << COM1A0); // 14.3.1 : set Compare Output with COM1A0, it toggles OC1A on compare match (Table 16-1), OC1A is alternate function for PORTB1 (Table 14-3)
OCR1A = TIME_MS(500); // set CTC compare value
// -> Table 16-4 : the value to reset the timer is the Output Compare Registers OCR1A
OCR1A = TIME_MS(500); // Table 16-4 : set CTC compare value, the counter is cleared to zero when the counter value (TCNT1) matches the OCR1A register
TCCR1B |= (PRESCALE_SET);

15
module01/ex02/main.c
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@@ -72,22 +72,17 @@
int main() {
MODE_OUTPUT(LED2);
// Table 16-4 : set timer in Fast PWM (Pulse With Modulation) mode with TOP = ICR1 (Mode 14)
SET(TCCR1A, WGM11);
SET(TCCR1A, WGM11); // Table 16-4 : set timer in Fast PWM (Pulse With Modulation) mode with TOP = ICR1 (Mode 14)
SET(TCCR1B, WGM12);
SET(TCCR1B, WGM13);
// Table 16-2 : non-inverting mode, the LED will be ON for DUTY_CYCLE% of the time (CLEAR OC1A on compare match, SET OC1A at BOTTOM)
SET(TCCR1A, COM1A1);
SET(TCCR1A, COM1A1); // Table 16-2 : non-inverting mode, the LED will be ON for DUTY_CYCLE% of the time (CLEAR OC1A on compare match, SET OC1A at BOTTOM)
// Table 16-4 : set the period (compare TOP value)
ICR1 = TIME_MS(PERIOD);
ICR1 = TIME_MS(PERIOD); // Table 16-4 : set the period (compare TOP value)
// 16.9.3 : set the duty cycle to DUTY_CYCLE% of the time -> OC1A (alternate function of PORTB1, aka LED2) is cleared when TCNT1 (the counter value) equals OCR1A
OCR1A = TIME_MS(PERCENT(DUTY_CYCLE, PERIOD));
OCR1A = TIME_MS(PERCENT(DUTY_CYCLE, PERIOD)); // 16.9.3 : set the duty cycle to DUTY_CYCLE% of the time -> OC1A (alternate function of PORTB1, aka LED2) is cleared when TCNT1 (the counter value) equals OCR1A
// start the timer with the prescaler
TCCR1B |= (PRESCALE_SET);
TCCR1B |= (PRESCALE_SET); // start the timer with the prescaler
while(1) {
continue;

15
module01/ex03/main.c
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@@ -110,22 +110,17 @@ int main() {
MODE_OUTPUT(LED2);
// Table 16-4 : set timer in Fast PWM (Pulse With Modulation) mode with TOP = ICR1 (Mode 14)
SET(TCCR1A, WGM11);
SET(TCCR1A, WGM11); // Table 16-4 : set timer in Fast PWM (Pulse With Modulation) mode with TOP = ICR1 (Mode 14)
SET(TCCR1B, WGM12);
SET(TCCR1B, WGM13);
// Table 16-2 : non-inverting mode, the LED will be ON for DUTY_CYCLE% of the time (CLEAR OC1A on compare match, SET OC1A at BOTTOM)
SET(TCCR1A, COM1A1);
SET(TCCR1A, COM1A1); // Table 16-2 : non-inverting mode, the LED will be ON for DUTY_CYCLE% of the time (CLEAR OC1A on compare match, SET OC1A at BOTTOM)
// Table 16-4 : set the period (compare TOP value)
ICR1 = TIME_MS(PERIOD);
ICR1 = TIME_MS(PERIOD); // Table 16-4 : set the period (compare TOP value)
// 16.9.3 : set the duty cycle to DUTY_CYCLE% of the time -> OC1A (alternate function of PORTB1, aka LED2) is cleared when TCNT1 (the counter value) equals OCR1A
OCR1A = TIME_MS(PERCENT(DUTY_CYCLE, PERIOD));
OCR1A = TIME_MS(PERCENT(DUTY_CYCLE, PERIOD)); // 16.9.3 : set the duty cycle to DUTY_CYCLE% of the time -> OC1A (alternate function of PORTB1, aka LED2) is cleared when TCNT1 (the counter value) equals OCR1A
// start the timer with the prescaler
TCCR1B |= (PRESCALE_SET);
TCCR1B |= (PRESCALE_SET); // start the timer with the prescaler
while(1) {
on_press(SW1, increment_duty_cycle, &params);

1
module02/ex00/Makefile Normal file
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@@ -0,0 +1 @@
include ../../Makefile

71
module02/ex00/main.c Normal file
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@@ -0,0 +1,71 @@
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
// stringify
#define STRINGIFY_HELPER(x) #x
#define STRINGIFY(x) STRINGIFY_HELPER(x)
// concatenate
#define CONCAT_HELPER(x, y) x ## y
#define CONCAT(x, y) CONCAT_HELPER(x, y)
// get argument
#define ARG_1(v1, v2) v1
#define ARG_2(v1, v2) v2
#define GET_PORT(args) ARG_1 args
#define GET_BIT(args) ARG_2 args
// actions on registers
#define SET(register, bit) register |= 1 << bit
#define CLEAR(register, bit) register &= ~(1 << bit)
#define TEST(register, bit) register & 1 << bit
#define TOGGLE(register, bit) register ^= 1 << bit
// actions on elements
#define SET_ELEM(elem) SET(CONCAT(PORT, GET_PORT(elem)), GET_BIT(elem))
#define CLEAR_ELEM(elem) CLEAR(CONCAT(PORT, GET_PORT(elem)), GET_BIT(elem))
#define TEST_ELEM(elem) TEST(CONCAT(PORT, GET_PORT(elem)), GET_BIT(elem))
#define TOGGLE_ELEM(elem) TOGGLE(CONCAT(PORT, GET_PORT(elem)), GET_BIT(elem))
#define MODE_OUTPUT(elem) SET(CONCAT(DDR, GET_PORT(elem)), GET_BIT(elem))
#define MODE_INPUT(elem) CLEAR(CONCAT(DDR, GET_PORT(elem)), GET_BIT(elem))
#define TOGGLE_PIN(elem) SET(CONCAT(PIN, GET_PORT(elem)), GET_BIT(elem))
#define TEST_PIN(elem) (TEST(CONCAT(PIN, GET_PORT(elem)), GET_BIT(elem)))
#define IS_PIN_SET(elem) (TEST_PIN(elem) == 0)
#define IS_PIN_CLEAR(elem) (TEST_PIN(elem) == 1)
// bits
#define D1 0
#define D2 1
#define D3 2
#define D4 4
#define SW1 2
#define SW2 4
// elements (port, bit)
#define LED1 (B, D1)
#define LED2 (B, D2)
#define LED3 (B, D3)
#define LED4 (B, D4)
#define BUTTON1 (D, SW1)
#define BUTTON2 (D, SW2)
// TIMER
#define TIME_MS(ms) (((F_CPU / PRESCALE_VALUE) * ms) / 1000)
// UART
#define UART_BAUDRATE 115200
// END MACROS
void uart_init() {}
void uart_tx(char c) {}
int main() {
uart_init();
while (1) {
uart_tx('Z');
_delay_ms(TIME_MS(1000));
}
}