aaron/tron.asm
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Implemented two players on single host, changed io processing to interrupt.

Browse Source
This commit is contained in:
id101010
2016-01-26 12:25:24 +01:00
parent 91d6b2af96
commit 77e64dacf7
8 changed files with 166 additions and 133 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
src/io.c
View File

@@ -1,6 +1,29 @@
#include "io.h"
//-----------Local types & functions--------------------------
typedef struct pin_s {
GPIO_TypeDef* GPIO;
uint16_t pinmask;
bool input;
} pin_t;
static void pin_create(pin_t* pin, GPIO_TypeDef* GPIO, uint8_t pinnr, bool input);
static bool pin_get(pin_t* pin);
static void pin_set(pin_t* pin, bool status);
static void pin_toggle(pin_t* pin);
//-------------Local Variables-------------------------
static pin_t pin_t0;
static pin_t pin_t1;
static pin_t pin_t2;
static pin_t pin_t3;
static uint8_t new = 0;
static uint8_t old = 0;
static volatile uint8_t edg = 0;
//---------------Implementation --------------------------------
void pin_create(pin_t* pin, GPIO_TypeDef* GPIO, uint8_t pinnr, bool input) {
GPIO_InitTypeDef gi;
GPIO_StructInit(&gi);
@@ -41,9 +64,38 @@ void pin_set(pin_t* pin, bool status) {
void pin_toggle(pin_t* pin) {
if(!pin->input) {
set_pin(pin,!get_pin(pin));
pin_set(pin,!pin_get(pin));
}
}
void io_init(void){
//gpio init
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOC,ENABLE);
pin_create(&pin_t0, GPIOC, 7, true);
pin_create(&pin_t1, GPIOB, 15, true);
pin_create(&pin_t2, GPIOB, 14, true);
pin_create(&pin_t3, GPIOI, 0, true);
}
void io_process(void) {
new = pin_get(&pin_t0) |
pin_get(&pin_t1) << 1 |
pin_get(&pin_t2) << 2 |
pin_get(&pin_t3) << 3;
edg |= (new ^ old) & new; // detect positive edge
old = new;
}
bool io_button_has_edge(uint8_t btnnumber) {
uint8_t bm = (1 << btnnumber);
bool status = ((edg & bm) > 0);
if(status){
edg &= ~bm;
}
return status;
}