#ifndef SYS_H__
#define SYS_H__


#include <stddef.h>
#include <stdint.h>


#define __NAKED__               __attribute__((naked))

typedef volatile uint8_t *      io8_t;
typedef volatile uint32_t *     io32_t;

#define RAM                     (*((io32_t) 0x00000000))
#define BOOTLOADER              (*((io32_t) 0x10000000))
#define GPIO                    (*((io32_t) 0x20000000))
#define GPIO_O                  (*((io8_t)  0x20000000))
#define GPIO_I                  (*((io8_t)  0x20000001))
#define GPIO_OE                 (*((io8_t)  0x20000002))
#define I2C_SR                  (*((io8_t)  0x30000000))
#define I2C_DR                  (*((io8_t)  0x30000004))
#define USB_SCR                 (*((io8_t)  0x40000000))
#define USB_DR                  (*((io8_t)  0x40000004))
#define UART_SCR                (*((io8_t)  0x50000000))
#define UART_DR                 (*((io8_t)  0x50000004))
#define DMA_SCR                 (*((io8_t)  0x60000000))
#define DMA_MADDR               (*((io32_t) 0x60000004))
#define DMA_ID_LEN              (*((io32_t) 0x60000008))
#define SDRAM                   (*((io32_t) 0x68000000))

#define I2C_SR_START            (1 << 0)
#define I2C_SR_STOP             (1 << 1)
#define I2C_SR_MACK             (1 << 2)
#define I2C_SR_ACK              (1 << 3)
#define I2C_SR_BUSY             (1 << 4)
#define I2C_ADDR_READ           (1 << 0)

#define USB_SCR_RXNE            (1 << 0)
#define USB_SCR_TXE             (1 << 1)
#define USB_SCR_FLUSH_RX        (1 << 2)
#define USB_SCR_FLUSH_TX        (1 << 3)

#define UART_SCR_RXNE           (1 << 0)
#define UART_SCR_TXE            (1 << 1)

#define DMA_SCR_START           (1 << 0)
#define DMA_SCR_STOP            (1 << 1)
#define DMA_SCR_DIR             (1 << 2)
#define DMA_SCR_BUSY            (1 << 3)

#define DMA_ID_USB              (0)
#define DMA_ID_SD               (1)


#endif