--- /dev/null
+/*
+ * File: edos.h
+ * Author: krik
+ *
+ * Created on 29 Ìàðò 2012 ã., 1:29
+ */
+
+#ifndef _EDOS_H
+#define _EDOS_H
+
+//#include "segalib.h"
+
+/*
+ * saddr: address in sectors
+ * slen: lenght in sectors
+ * wr_slen: how many sectors will be written
+ * sector size 512 bytes
+ * dma reading of usb and SD available only if data destination located in rom area (0-0x3ffffff). dma reading not available for genesis ram
+ * destination address for dma reading must be aligned to 512b
+ * one mbyte of sdram can be mapped to one of four banks in rom space. osSetMemMap(u16) can be used for mapping configuration.
+ * os code located in last mbyte of sdram and should be mapped in bank 0
+ * user code located in begin of sdram. default mapping 0x210f means that end of sdram (OS) mapped to area 0-0x0fffff, first mbyte of user code mapped to 0x100000-0x1fffff,
+ * memory configuration:
+ * genesis address: 0x000000-0x0fffff, physical sdram address: 0xf00000-0xffffff OS
+ * genesis address: 0x100000-0x3fffff, physical sdram address: 0x000000-0x2fffff user code (current application)
+ * 0xff0000-0xff00ff OS dma code
+ * first 256bytes of genesis ram must be reserved for OS
+ * */
+
+
+#define MEM_ERR_SPI_RD_TIMEOUT 120
+
+#define ERR_FILE_TOO_BIG 140
+#define ERR_WRON_OS_SIZE 142
+#define ERR_OS_VERIFY 143
+#define ERR_OS_VERIFY2 144
+#define ERR_BAD_DMA_ADDRESS 145
+#define ERR_MUST_NOT_RET 146
+
+//100 - 119 fat errors
+#define FAT_ERR_NOT_EXIST 100
+#define FAT_ERR_EXIST 101
+#define FAT_ERR_NAME 102
+#define FAT_ERR_OUT_OF_FILE 103
+#define FAT_ERR_BAD_BASE_CLUSTER 104;
+#define FAT_ERR_NO_FRE_SPACE 105
+#define FAT_ERR_NOT_FILE 106
+#define FAT_ERR_FILE_MODE 107
+#define FAT_ERR_ROT_OVERFLOW 108
+#define FAT_ERR_OUT_OF_TABLE 109
+#define FAT_ERR_INIT 110
+#define FAT_LFN_BUFF_OVERFLOW 111
+#define FAT_DISK_NOT_READY 112
+#define FAT_ERR_SIZE 113
+#define FAT_ERR_RESIZE 114
+
+
+#define DISK_ERR_INIT 50
+#define DISK_ERR_RD1 62
+#define DISK_ERR_RD2 63
+
+#define DISK_ERR_WR1 64
+#define DISK_ERR_WR2 65
+#define DISK_ERR_WR3 66
+#define DISK_ERR_WR4 67
+#define DISK_ERR_WR5 68
+
+typedef struct {
+ u32 entry_cluster;
+ u32 size;
+ u32 hdr_sector;
+ u16 hdr_idx;
+ u8 name[256];
+ u16 is_dir;
+} FatFullRecord;
+
+typedef struct {
+ u8(*diskWrite)(u32 saddr, u8 *buff, u16 slen);
+ u8(*diskRead)(u32 saddr, void *buff, u16 slen);//*dst must be alligned to 512bytes and be in range 0x100000-0x3fffff. *dst can be located in genesis ram also, but transfer will be slow in this case
+ u8(*usbReadByte)();//loop inside of function waiting until usbRdReady != 0
+ void (*usbWriteByte)(u8 dat);//loop inside of function waiting until usbWrReady != 0
+ u8(*usbReadDma)(u16 *dst, u16 slen);//*dst must be alligned to 512bytes and be in range 0x100000-0x3fffff
+ u8(*usbReadPio)(u16 *dst, u16 slen);
+ u8(*usbRdReady)(); //return 1 if some data comes from pc
+ u8(*usbWrReady)(); //return 1 usb ready to send byte
+ void (*osSetMemMap)(u16 map); //memoty configuration 4x1Mb
+ u16(*osGetOsVersion)();
+ u16(*osGetFirmVersion)();
+ void (*osGetSerial)(u32 * buff); // 8bytes uniq serial number
+ void (*VDP_setReg)(u8 reg, u8 value);//os vdp functions should be used, otherwise system may hang while udb/sd dma
+ void (*VDP_vintOn)();
+ void (*VDP_vintOff)();
+ void (*memInitDmaCode)();//copy dma routine to genesis ram
+ u8(*fatReadDir)(FatFullRecord * frec);//get next record in current dir
+ void(*fatOpenDir)(u32 entry_cluster);//arg is entry cluster ot dir or 0. zero arg means that need to open root dir
+ u8(*fatOpenFileByeName)(u8 *name, u32 wr_slen);//wr_slen write len, or 0 if reading
+ u8(*fatOpenFile)(FatFullRecord *rec, u32 wr_slen);//wr_slen is write len, or 0 if reading
+ u8(*fatReadFile)(void *dst, u32 slen);
+ u8(*fatWriteFile)(void *src, u32 slen);
+ u8(*fatCreateRecIfNotExist)(u8 *name, u8 is_dir);
+ u8(*fatSkipSectors)(u32 slen);
+} OsRoutine;
+
+
+extern OsRoutine *ed_os;
+void edInit();
+
+
+//stereo dac. 8bit for each channel.
+//any writing to this port enables dac output, any reading from this port disables dac output.
+#define REG_DAC *((volatile u16*) (0xA1300E))
+
+
+//stuff for direct access to usb and spi. not recommended for use. OS function should be used for best compatibility
+#define _SPI_SS 0
+#define _SPI_FULL_SPEED 1
+#define _SPI_SPI16 2
+#define _SPI_AREAD 3
+
+//spi port (sd interface)
+#define SPI_PORT *((volatile u16*) (0xA13000))
+#define SPI_CFG_PORT *((volatile u16*) (0xA13002))
+
+//16bit or 8bit spi mode
+#define SPI16_ON SPI_CFG_PORT |= (1 << _SPI_SPI16)
+#define SPI16_OFF SPI_CFG_PORT &= ~(1 << _SPI_SPI16)
+
+//spi autoread. means that not need to write something to spi port before than read
+#define SPI_AR_ON SPI_CFG_PORT |= (1 << _SPI_AREAD)
+#define SPI_AR_OFF SPI_CFG_PORT &= ~(1 << _SPI_AREAD)
+
+//spi chip select
+#define SPI_SS_OFF SPI_CFG_PORT |= (1 << _SPI_SS)
+#define SPI_SS_ON SPI_CFG_PORT &= ~(1 << _SPI_SS)
+
+//spi speed. low speed need only for sd init
+#define SPI_HI_SPEED_ON SPI_CFG_PORT |= (1 << _SPI_FULL_SPEED)
+#define SPI_HI_SPEED_OFF SPI_CFG_PORT &= ~(1 << _SPI_FULL_SPEED)
+
+//usb-serial port
+#define FIFO_PORT *((volatile u16*) (0xA1300A))
+
+//spi and usb state
+#define STATE_PORT *((volatile u16*) (0xA1300C))
+#define _STATE_SPI_READY 0
+#define _STATE_FIFO_WR_READY 1
+#define _STATE_FIFO_RD_READY 2
+#define IS_FIFO_RD_READY (STATE_PORT & (1 << _STATE_FIFO_RD_READY))
+#define IS_FIFO_WR_READY (STATE_PORT & (1 << _STATE_FIFO_WR_READY))
+
+
+#endif /* _EDOS_H */
+
notaz.gp2x.de / megadrive.git / blobdiff