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malloc and free r bad

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They will kill ur mother
This commit is contained in:
David Lenfesty 2019-11-28 13:33:46 -07:00
parent 958073b19b
commit 45e0794fe3
11 changed files with 304 additions and 194 deletions
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35
final_project/comms/comms.c
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@ -1,35 +0,0 @@
#include "comms.h"
inline void comms_send_command(comms_cmd_t cmd) {
while (! (UCSRA & (1 << UDRE)));
UDR = cmd;
}
inline void comms_add_file(uint8_t id, char* filename) {
uint8_t len = strlen(filename);
comms_send_command(COMMS_CMD_ADD_FILE);
comms_send_command((comms_cmd_t) id);
uint8_t i = 0;
while (i < len) {
comms_send_command((comms_cmd_t) filename[i]);
}
}
inline void comms_select_file(uint8_t id) {
comms_send_command(COMMS_CMD_SELECT_FILE);
comms_send_command((comms_cmd_t) id);
}
inline void comms_clear() {
comms_send_command(COMMS_CMD_CLR);
}
inline void comms_play() {
comms_send_command(COMMS_CMD_PLAY);
}
inline void comms_pause() {
comms_send_command(COMMS_CMD_PLAY);
}

37
final_project/comms/comms.h
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@ -21,26 +21,51 @@ typedef enum {
/** @brief Inline function to send commands and values.
*/
inline void comms_send_command(comms_cmd_t cmd);
inline void comms_send_command(comms_cmd_t cmd) {
while (! (UCSRA & (1 << UDRE)));
UDR = cmd;
}
/** @brief Adds a file to the list on the LCD side.
*/
inline void comms_add_file(uint8_t id, char* filename);
inline void comms_add_file(uint8_t id, char* filename) {
uint8_t len = strlen(filename);
comms_send_command(COMMS_CMD_ADD_FILE);
comms_send_command((comms_cmd_t) id);
uint8_t i = 0;
while (i < len) {
comms_send_command((comms_cmd_t) filename[i]);
}
}
/** @brief Selects a file from the list on the DAC side.
*
* If another song is playing, this will stop
* that song from playing and select the new one.
*/
inline void comms_select_file(uint8_t id);
inline void comms_select_file(uint8_t id) {
comms_send_command(COMMS_CMD_SELECT_FILE);
comms_send_command((comms_cmd_t) id);
}
/** @brief Clears the LCD list of files.
*/
inline void comms_clear();
inline void comms_clear() {
comms_send_command(COMMS_CMD_CLR);
}
/** @brief Starts playing song.
*/
inline void comms_play();
inline void comms_play() {
comms_send_command(COMMS_CMD_PLAY);
}
/** @brief Pauses playing song.
*/
inline void comms_pause();
inline void comms_pause() {
comms_send_command(COMMS_CMD_PLAY);
}
#endif

3
final_project/lcd_disp/.vscode/c_cpp_properties.json vendored
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@ -10,7 +10,8 @@
"-Wall", "-pedantic", "-mmcu=attiy2313a"
],
"defines": [
"F_CPU=16000000"
"F_CPU=16000000",
"__"
]
}
],

3
final_project/lcd_disp/.vscode/settings.json vendored Normal file
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@ -0,0 +1,3 @@
{
"C_Cpp.intelliSenseEngine": "Tag Parser"
}

1
final_project/lcd_disp/comms.c
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@ -1 +0,0 @@
../comms/comms.c

104
final_project/lcd_disp/main.c
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@ -3,16 +3,19 @@
/* ---- Global Flags ---- */
int16_t display_song = -1; //! ID of the song currently being displayed, -1 if song list is not initialised
int16_t selected_song = -1; //! ID of the selected song. -1 if no song is selected.
bool update_display = false; //! flag on whether or not to update display
struct {
char* names[MAX_SONGS];
uint8_t num_songs;
char* names[MAX_SONGS]; //! array of all song names, names are allocated on heap
uint8_t num_songs; //! Number of songs loaded into display memory
bool playing; //! Whether the currently selected song is playing
} songs;
/** @brief Adds song to list of songs
*
* Allocates a new piece of memory for the name.
*/
/*
void add_song(char* name) {
// Error out on too many songs
if (songs.num_songs == MAX_SONGS) {
@ -26,11 +29,13 @@ void add_song(char* name) {
songs.names[songs.num_songs] = malloc(name_len);
songs.num_songs++;
}
*/
/** @brief Clears list of songs
*
* Frees all memory used for name storage
*/
/*
void clear_songs() {
// Free all memory
for (uint8_t i = 0; i < songs.num_songs; i++) {
@ -39,59 +44,64 @@ void clear_songs() {
songs.num_songs = 0;
}
/** @brief Handles incoming Serial commands from the main player.
*/
ISR(USART_RX_vect) {
cli();
// Push incoming data to FIFO
fifo_push(UDR);
sei();
}
/** @brief Sets up various GPIO functions
*/
void gpio_init() {
// Initialise button pins as inputs
BUTTONS_DDR &= ~(1 << BUTTONS_LEFT_PIN) &
~(1 << BUTTONS_RIGHT_PIN) &
~(1 << BUTTONS_PLAYPAUSE_PIN);
// Turn on button pullups
BUTTONS_PORT |= (1 << BUTTONS_LEFT_PIN) |
(1 << BUTTONS_RIGHT_PIN) |
(1 << BUTTONS_PLAYPAUSE_PIN);
}
/** @brief Sets up USART for TX and RX with a baud rate of USART_BAUDRATE
*/
void usart_init() {
// initialize USART
UBRRL = UBRR_VALUE & 255;
UBRRH = UBRR_VALUE >> 8;
UCSRB = (1 << TXEN) | (1 << RXEN); // fire-up USART
UCSRC = (1 << UCSZ1) | (1 << UCSZ0); // fire-up USART
// Enable RX complete interrupt
UCSRB |= (1 << RXCIE);
}
void handle_left_press() {
if (songs.num_songs == 0) {
lcd_clrscr();
lcd_puts("No songs to play!");
} else {
// Choose lower ID song. Wrap around.
display_song--;
if (display_song == 0) {
display_song = songs.num_songs - 1;
}
}
}
void handle_right_press() {
if (songs.num_songs == 0) {
lcd_clrscr();
lcd_puts("No songs to play!");
} else {
// Choose higher ID song. Wrap around.
display_song++;
if (display_song == songs.num_songs) {
display_song = 0;
}
}
}
// TODO NOT DONE
/** @brief Handles playpause button press.
*
* Based on selected song and displayed song, will select new song
* or play/pause song.
*/
void handle_playpause_press() {
// If there are no songs displayed, error
if (display_song == -1) {
lcd_clrscr();
lcd_puts("No songs to play!");
return;
}
// If no song selected, select the correct one.
if (selected_song == -1) {
comms_select_file(display_song);
return;
}
// Song selected, send play/pause
if (songs.playing) {
comms_pause();
songs.playing = false;
} else {
comms_play();
songs.playing = true;
}
return;
}
int main() {
@ -102,6 +112,7 @@ int main() {
gpio_init();
usart_init();
lcd_init(LCD_DISP_ON);
lcd_clrscr();
lcd_gotoxy(0,0);
@ -130,6 +141,19 @@ int main() {
_delay_ms(100); // Delay to debounce
}
// Update display periodically
if (update_display) {
lcd_clrscr();
lcd_gotoxy(0,0);
lcd_puts(songs.names[display_song]);
lcd_gotoxy(0, 1);
//char tmp_string[17];
//sprintf(tmp_string, "%1d %2d/%2d",
// display_song, display_song, songs.num_songs);
//lcd_puts(tmp_string);
update_display = false;
}
}
}

13
final_project/lcd_disp/main.h
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@ -5,22 +5,19 @@
#include <avr/interrupt.h>
#include <util/delay.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include "lcd.h"
#include "fifo.h"
#include "comms.h"
#define USART_BAUDRATE 9600 //! USART baudrate, change this to set it.
#define UBRR_VALUE (((F_CPU/(USART_BAUDRATE*16UL)))-1)
#include "periph.h"
#define MAX_SONGS 16
#define BUTTONS_DDR DDRD
#define BUTTONS_PORT PORTD
#define BUTTONS_LEFT_PIN PORTD2
#define BUTTONS_RIGHT_PIN PORTD3
#define BUTTONS_PLAYPAUSE_PIN PORTD4
/* ---- Globally available flags ---- */
extern bool update_display;
#endif

69
final_project/lcd_disp/periph.c Normal file
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@ -0,0 +1,69 @@
#include "periph.h"
/** @brief Handles incoming Serial commands from the main player.
*/
ISR(USART_RX_vect) {
cli();
// Push incoming data to FIFO
fifo_push(UDR);
// Flag is cleared by reading data from UDR
sei();
}
/** @brief Display update timer
*/
ISR(TIMER0_COMPA_vect) {
cli();
update_display = true;
// Flag is cleared by calling the vector
sei();
}
void gpio_init() {
// Initialise button pins as inputs
BUTTONS_DDR &= ~(1 << BUTTONS_LEFT_PIN) &
~(1 << BUTTONS_RIGHT_PIN) &
~(1 << BUTTONS_PLAYPAUSE_PIN);
// Turn on button pullups
BUTTONS_PORT |= (1 << BUTTONS_LEFT_PIN) |
(1 << BUTTONS_RIGHT_PIN) |
(1 << BUTTONS_PLAYPAUSE_PIN);
}
void timer_init() {
/**
* Need to verify the math here.
* But with a prescaler of 1024, f_cpu at 8MHz, an OCRA of 195 gives
* 20Hz refresh rate.
*/
// COM0x can be set to defaults
// To set to CTC, WGM = 0b010
TCCR0A = (1 << WGM01);
// CS = 0b101 -> 1024 prescaler
// Everything else should be 0.
// TCCR0B = 0b00000101; <- can't use this because binary stuff is a GCC extension
TCCR0B = 5;
// Set to ~20Hz
OCR0A = 195;
// Enable interrupt
TIMSK = (1 << OCIE0A);
}
void usart_init() {
// initialize USART
UBRRL = UBRR_VALUE & 255;
UBRRH = UBRR_VALUE >> 8;
UCSRB = (1 << TXEN) | (1 << RXEN); // fire-up USART
UCSRC = (1 << UCSZ1) | (1 << UCSZ0); // fire-up USART
// Enable RX complete interrupt
UCSRB |= (1 << RXCIE);
}

45
final_project/lcd_disp/periph.h Normal file
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@ -0,0 +1,45 @@
/**
* @mainpage
* Peripherals
*
* @brief Peripheral initialization functions and interrupt handling routines.
*
*
* Contains the ISRs to handle the USART RX interrupt and the display timer interrupt.
*/
#ifndef PERIPH_H_
#define PERIPH_H_
#include "main.h"
#define USART_BAUDRATE 9600 //! USART baudrate, change this to set it.
#define UBRR_VALUE (((F_CPU/(USART_BAUDRATE*16UL)))-1)
#define BUTTONS_DDR DDRD
#define BUTTONS_PORT PORTD
#define BUTTONS_LEFT_PIN PORTD2
#define BUTTONS_RIGHT_PIN PORTD3
#define BUTTONS_PLAYPAUSE_PIN PORTD4
/** @brief Sets up various GPIO functions
*
* First enables buttons as inputs.
*/
void gpio_init();
/** @brief Initialises timer for updating display
*
* Sets up timer0 in
*/
void timer_init();
/** @brief Sets up USART for TX and RX with a baud rate of USART_BAUDRATE
*/
void usart_init();
#endif

186
final_project/lcd_disp/sd-reader.map
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@ -6,15 +6,11 @@ Archive member included to satisfy reference by file (symbol)
main.o (__do_copy_data)
/usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_clear_bss.o)
main.o (__do_clear_bss)
/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
main.o (malloc)
Allocating common symbols
Common symbol size file
__brkval 0x2 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
songs 0x21 main.o
__flp 0x2 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
songs 0x22 main.o
Memory Configuration
@ -32,7 +28,7 @@ Linker script and memory map
LOAD /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/crtattiny2313a.o
LOAD lcd.o
LOAD comms.o
LOAD periph.o
LOAD main.o
LOAD fifo.o
START GROUP
@ -139,7 +135,7 @@ END GROUP
.rela.plt
*(.rela.plt)
.text 0x0000000000000000 0x65a
.text 0x0000000000000000 0x4d6
*(.vectors)
.vectors 0x0000000000000000 0x2a /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/crtattiny2313a.o
0x0000000000000000 __vectors
@ -204,7 +200,6 @@ END GROUP
0x000000000000005c __vector_6
0x000000000000005c __vector_3
0x000000000000005c __vector_11
0x000000000000005c __vector_13
0x000000000000005c __vector_17
0x000000000000005c __vector_19
0x000000000000005c __vector_5
@ -229,76 +224,71 @@ END GROUP
0x0000000000000180 lcd_puts
0x0000000000000196 lcd_puts_p
0x00000000000001b2 lcd_init
.text 0x0000000000000216 0x0 comms.o
.text 0x0000000000000216 0xe4 main.o
0x0000000000000216 add_song
0x000000000000025e clear_songs
0x0000000000000288 __vector_7
0x00000000000002d4 gpio_init
0x00000000000002e2 usart_init
0x00000000000002f4 handle_left_press
0x00000000000002f6 handle_right_press
0x00000000000002f8 handle_playpause_press
.text 0x00000000000002fa 0xb6 fifo.o
0x00000000000002fa fifo_init
0x000000000000030c fifo_pop
0x0000000000000360 fifo_push
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.text 0x00000000000003b0 0x0 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
0x00000000000003b0 . = ALIGN (0x2)
.text 0x0000000000000216 0xa0 periph.o
0x0000000000000216 __vector_7
0x0000000000000262 __vector_13
0x0000000000000284 gpio_init
0x0000000000000292 timer_init
0x00000000000002a4 usart_init
.text 0x00000000000002b6 0xc8 main.o
0x00000000000002b6 handle_left_press
0x00000000000002ec handle_right_press
0x0000000000000322 handle_playpause_press
.text 0x000000000000037e 0xb6 fifo.o
0x000000000000037e fifo_init
0x0000000000000390 fifo_pop
0x00000000000003e4 fifo_push
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.text 0x0000000000000434 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_clear_bss.o)
0x0000000000000434 . = ALIGN (0x2)
*(.text.*)
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0x00000000000003b0 main
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0x0000000000000434 main
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.text.libgcc.fixed
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.text.avr-libc
0x0000000000000414 0x242 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
0x0000000000000414 malloc
0x0000000000000544 free
0x0000000000000656 . = ALIGN (0x2)
0x00000000000004d2 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_clear_bss.o)
0x00000000000004d2 . = ALIGN (0x2)
*(.fini9)
.fini9 0x0000000000000656 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_exit.o)
0x0000000000000656 exit
0x0000000000000656 _exit
.fini9 0x00000000000004d2 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_exit.o)
0x00000000000004d2 exit
0x00000000000004d2 _exit
*(.fini9)
*(.fini8)
*(.fini8)
@ -317,16 +307,16 @@ END GROUP
*(.fini1)
*(.fini1)
*(.fini0)
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*(.fini0)
0x000000000000065a _etext = .
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.data 0x0000000000800060 0x1a load address 0x000000000000065a
.data 0x0000000000800060 0x16 load address 0x00000000000004d6
0x0000000000800060 PROVIDE (__data_start, .)
*(.data)
.data 0x0000000000800060 0x0 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/crtattiny2313a.o
.data 0x0000000000800060 0x0 lcd.o
.data 0x0000000000800060 0x0 comms.o
.data 0x0000000000800060 0x0 periph.o
.data 0x0000000000800060 0x4 main.o
0x0000000000800060 selected_song
0x0000000000800062 display_song
@ -334,49 +324,42 @@ END GROUP
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.data 0x0000000000800064 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_clear_bss.o)
.data 0x0000000000800064 0x6 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
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0x0000000000800076 _edata = .
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.bss 0x0000000000800076 0x5b
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*(.bss)
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.bss 0x000000000080007a 0x0 lcd.o
.bss 0x000000000080007a 0x0 comms.o
.bss 0x000000000080007a 0x0 main.o
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.bss 0x00000000008000b2 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_copy_data.o)
.bss 0x00000000008000b2 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_clear_bss.o)
.bss 0x00000000008000b2 0x0 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
.bss 0x0000000000800076 0x0 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/crtattiny2313a.o
.bss 0x0000000000800076 0x0 lcd.o
.bss 0x0000000000800076 0x0 periph.o
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0x0000000000800076 update_display
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.bss 0x00000000008000af 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_exit.o)
.bss 0x00000000008000af 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_copy_data.o)
.bss 0x00000000008000af 0x0 /usr/lib/gcc/avr/5.4.0/avr25/tiny-stack/libgcc.a(_clear_bss.o)
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COMMON 0x00000000008000b2 0x21 main.o
0x00000000008000b2 songs
COMMON 0x00000000008000d3 0x4 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
0x00000000008000d3 __brkval
0x00000000008000d5 __flp
0x00000000008000d7 PROVIDE (__bss_end, .)
0x000000000000065a __data_load_start = LOADADDR (.data)
0x0000000000000674 __data_load_end = (__data_load_start + SIZEOF (.data))
COMMON 0x00000000008000af 0x22 main.o
0x00000000008000af songs
0x00000000008000d1 PROVIDE (__bss_end, .)
0x00000000000004d6 __data_load_start = LOADADDR (.data)
0x00000000000004ec __data_load_end = (__data_load_start + SIZEOF (.data))
.noinit 0x00000000008000d7 0x0
.noinit 0x00000000008000d1 0x0
[!provide] PROVIDE (__noinit_start, .)
*(.noinit*)
[!provide] PROVIDE (__noinit_end, .)
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[!provide] PROVIDE (__heap_start, .)
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@ -397,19 +380,19 @@ END GROUP
.user_signatures
*(.user_signatures*)
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.stab 0x0000000000000000 0x2208
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.stab 0x0000000000001008 0x30c comms.o
0x4e0 (size before relaxing)
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0x978 (size before relaxing)
.stab 0x0000000000001aa0 0x45c fifo.o
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0x81c (size before relaxing)
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0xa38 (size before relaxing)
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0x5f4 (size before relaxing)
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.stab.excl
*(.stab.excl)
@ -427,10 +410,9 @@ END GROUP
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0x12 (size before relaxing)
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.comment 0x0000000000000011 0x12 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr25/tiny-stack/libc.a(malloc.o)
.note.gnu.avr.deviceinfo
0x0000000000000000 0x40

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final_project/lcd_disp/sd-reader.out
View File

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