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#include <stdint.h>
#include <stdlib.h>
#include <chopstx.h>
#include "board.h"
#define PERIPH_BASE 0x40000000
#define APBPERIPH_BASE PERIPH_BASE
#define APB2PERIPH_BASE (PERIPH_BASE + 0x10000)
struct GPIO {
volatile uint32_t CRL;
volatile uint32_t CRH;
volatile uint32_t IDR;
volatile uint32_t ODR;
volatile uint32_t BSRR;
volatile uint32_t BRR;
volatile uint32_t LCKR;
};
#define GPIOA_BASE (APB2PERIPH_BASE + 0x0800)
#define GPIOA ((struct GPIO *) GPIOA_BASE)
#define GPIOB_BASE (APB2PERIPH_BASE + 0x0C00)
#define GPIOB ((struct GPIO *) GPIOB_BASE)
#define GPIOC_BASE (APB2PERIPH_BASE + 0x1000)
#define GPIOC ((struct GPIO *) GPIOC_BASE)
#define GPIOD_BASE (APB2PERIPH_BASE + 0x1400)
#define GPIOD ((struct GPIO *) GPIOD_BASE)
#define GPIOE_BASE (APB2PERIPH_BASE + 0x1800)
#define GPIOE ((struct GPIO *) GPIOE_BASE)
static struct GPIO *const GPIO_STICK = ((struct GPIO *const) GPIO_LED_BASE);
static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
static struct GPIO *const GPIO_OTHER1 = ((struct GPIO *const) GPIOC_BASE);
static struct GPIO *const GPIO_OTHER2 = ((struct GPIO *const) GPIOB_BASE);
#define GPIO_STICK_L 3
#define GPIO_STICK_R 4
#define GPIO_STICK_U 5
#define GPIO_STICK_D 6
#define GPIO_SHUTDOWN 13
#define GPIO_PBUTTON 8
#define GPIO_BACKLIGHT 8
void
shutdown (void)
{
GPIO_OTHER1->BRR = (1 << GPIO_SHUTDOWN);
GPIO_OTHER1->BSRR = (1 << GPIO_SHUTDOWN);
while (1)
chopstx_usec_wait (500*1000);
}
void
set_backlight (int on)
{
if (on)
GPIO_OTHER2->BSRR = (1 << GPIO_BACKLIGHT);
else
GPIO_OTHER2->BRR = (1 << GPIO_BACKLIGHT);
}
int
joystick (void)
{
return (GPIO_STICK->IDR >> GPIO_STICK_L) & 0xf;
}
int
pbutton (void)
{
return (GPIO_OTHER->IDR >> GPIO_PBUTTON) & 1;
}
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