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chore(comments/format): commented and formatted all the c files

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Maix0 2026-04-14 09:56:31 +02:00
parent f52ce027a6
commit dbcc449552
5 changed files with 157 additions and 72 deletions
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57
.clang-format Normal file
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@ -0,0 +1,57 @@
BasedOnStyle: Chromium
AccessModifierOffset: 0
AlignConsecutiveAssignments:
Enabled: true
AcrossEmptyLines: true
AcrossComments: true
AlignCompound: true
AlignFunctionPointers: true
PadOperators: false
AlignConsecutiveBitFields:
Enabled: true
AcrossEmptyLines: true
AcrossComments: true
AlignCompound: true
AlignFunctionPointers: true
PadOperators: true
AlignConsecutiveDeclarations:
Enabled: true
AcrossComments: true
AlignCompound: true
AlignFunctionPointers: true
PadOperators: true
AlignConsecutiveMacros:
Enabled: true
AcrossEmptyLines: true
AcrossComments: true
AlignCompound: true
AlignFunctionPointers: true
PadOperators: true
AlignConsecutiveShortCaseStatements:
Enabled: true
AcrossEmptyLines: true
AcrossComments: true
AlignCaseArrows: true
AlignCaseColons: true
ColumnLimit: 100
NamespaceIndentation: All
CommentPragmas: ""
IncludeCategories:
- Regex: ^<.*\.h>
Priority: 1
SortPriority: 0
CaseSensitive: false
- Regex: ^<.*
Priority: 2
SortPriority: 0
CaseSensitive: false
- Regex: .*
Priority: 3
SortPriority: 0
CaseSensitive: false
IndentPPDirectives: AfterHash
IndentWidth: 4
TabWidth: 4
UseTab: Always
Language: Cpp
IndentAccessModifiers: true

15
ex01/main.c
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@ -3,11 +3,14 @@
#define LED_PORT PORTB0
int main(void) {
// set pin to output
DDRB |= (_BV(LED_PORT));
// set pin to output
// DDRB is the register that set the direction of the pins (IN/OUT)
// we want to say that the LED_PORT pin is an OUT pin, which isnt the default
DDRB |= (_BV(LED_PORT));
// say to pull high the pin
PORTB |= (_BV(LED_PORT));
while (1)
;
// say to pull high the pins
// since the pin is set to output, this works !
PORTB |= (_BV(LED_PORT));
while (1)
;
}

28
ex02/main.c
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@ -7,15 +7,23 @@
#define BTN_PORT PIND2
int main(void) {
// set pin to output
DDRB |= (_BV(LED_PORT));
// set pin to output
// DDRB is the register that set the direction of the pins (IN/OUT)
// we want to say that the LED_PORT pin is an OUT pin, which isnt the default
DDRB |= (_BV(LED_PORT));
while (true) {
bool cur = (PIND & _BV(BTN_PORT));
if (!cur)
PORTB |= (_BV(LED_PORT));
else
PORTB &= ~(_BV(LED_PORT));
_delay_ms(20.f);
}
while (true) {
// to read the pin value (IN pin), we read from the PINX register, and
// select the correct bit. Here the correct bit is the 1 << BTN_PORT1
bool cur = (PIND & _BV(BTN_PORT));
// depending on if the pin is set, we turn on or off the led
if (!cur)
PORTB |= (_BV(LED_PORT)); // on
else
PORTB &= ~(_BV(LED_PORT)); // off
// lets wait a bit before going again
_delay_ms(20.f);
}
}

42
ex03/main.c
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@ -7,21 +7,31 @@
#define BTN_PORT PIND2
int main(void) {
// set pin to output
DDRB |= (_BV(LED_PORT));
// set pin to output
// DDRB is the register that set the direction of the pins (IN/OUT)
// we want to say that the LED_PORT pin is an OUT pin, which isnt the default
DDRB |= (_BV(LED_PORT));
bool led_state = false;
bool prev = (PIND & _BV(BTN_PORT));
while (true) {
bool cur = (PIND & _BV(BTN_PORT));
if (prev && !cur) {
led_state = !led_state;
if (led_state)
PORTB |= (_BV(LED_PORT));
else
PORTB &= ~(_BV(LED_PORT));
}
prev = cur;
_delay_ms(20.f);
}
// lets keep track of the led state here
bool led_state = false;
// lets also keep track of the button state for the last iteration
bool prev = (PIND & _BV(BTN_PORT));
while (true) {
// we read it
bool cur = (PIND & _BV(BTN_PORT));
// if it wasnt pressed before, but pressed now -> it just turned on
if (prev && !cur) {
// toggle the state and update the led with the new state
led_state = !led_state;
if (led_state)
PORTB |= (_BV(LED_PORT));
else
PORTB &= ~(_BV(LED_PORT));
}
// keep track of the old state for next iteration
prev = cur;
// sleep
_delay_ms(20.f);
}
}

87
ex04/main.c
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@ -4,52 +4,59 @@
#include <stdbool.h>
#define D1 PB0
#define D2 PB1
#define D3 PB2
#define D4 PB4
#define D1 PB0
#define D2 PB1
#define D3 PB2
#define D4 PB4
#define SW1 PD2
#define SW2 PD4
int main(void) {
DDRB |= _BV(D4);
DDRB |= _BV(D3);
DDRB |= _BV(D2);
DDRB |= _BV(D1);
// ouput pins for leds
DDRB |= _BV(D4);
DDRB |= _BV(D3);
DDRB |= _BV(D2);
DDRB |= _BV(D1);
DDRD &= ~(_BV(SW1));
DDRD &= ~(_BV(SW2));
// set input (not neccessary since input by default)
DDRD &= ~(_BV(SW1));
DDRD &= ~(_BV(SW2));
PORTB |= _BV(D4);
PORTB |= _BV(D4);
uint8_t prev = 0;
uint8_t value = 0;
while (true) {
uint8_t cur = (PIND & (_BV(SW1) | _BV(SW2)));
if (prev & (_BV(SW1)) && !(cur & (_BV(SW1)))) {
value++;
}
if (prev & (_BV(SW2)) && !(cur & (_BV(SW2)))) {
value--;
}
prev = cur;
if (value & 0b0001)
PORTB |= (_BV(D1));
else
PORTB &= ~(_BV(D1));
if (value & 0b0010)
PORTB |= (_BV(D2));
else
PORTB &= ~(_BV(D2));
if (value & 0b0100)
PORTB |= (_BV(D3));
else
PORTB &= ~(_BV(D3));
if (value & 0b1000)
PORTB |= (_BV(D4));
else
PORTB &= ~(_BV(D4));
_delay_ms(20);
}
uint8_t prev = 0;
uint8_t value = 0;
while (true) {
// lets read both button in a single byte, and keep track of that too
uint8_t cur = (PIND & (_BV(SW1) | _BV(SW2)));
// check for button SW1
if (prev & (_BV(SW1)) && !(cur & (_BV(SW1)))) {
value++;
}
// check for button SW2
if (prev & (_BV(SW2)) && !(cur & (_BV(SW2)))) {
value--;
}
prev = cur;
// for each bit of the counter -> lets turn on or of the led
if (value & 0b0001)
PORTB |= (_BV(D1));
else
PORTB &= ~(_BV(D1));
if (value & 0b0010)
PORTB |= (_BV(D2));
else
PORTB &= ~(_BV(D2));
if (value & 0b0100)
PORTB |= (_BV(D3));
else
PORTB &= ~(_BV(D3));
if (value & 0b1000)
PORTB |= (_BV(D4));
else
PORTB &= ~(_BV(D4));
_delay_ms(20);
}
}