main.c File Reference

NEORV32 bootloader. More...

#include <stdint.h>
#include <neorv32.h>
#include <config.h>
#include <spi_flash.h>
#include <twi_flash.h>
#include <uart.h>

Macros
#define	EXE_STREAM_UART   0
#define	EXE_STREAM_SPI   1
#define	EXE_STREAM_TWI   2
#define	EXE_OFFSET_SIGNATURE   (0)
#define	EXE_OFFSET_SIZE   (4)
#define	EXE_OFFSET_CHECKSUM   (8)
#define	EXE_OFFSET_DATA   (12)
#define	EXE_SIGNATURE   0x4788CAFEU
#define	xstr(a)
#define	str(a)

Functions
void	bootloader_trap_handler (void)
void	print_help (void)
void	start_app (void)
int	load_exe (int src)
void	save_exe (int dst)
int	get_exe_word (int src, uint32_t addr, uint32_t *rdata)
int	put_exe_word (int dst, uint32_t addr, uint32_t wdata)
int	main (void)

Variables
uint32_t	exe_available = 0

Detailed Description

NEORV32 bootloader.

Macro Definition Documentation

str

#define str

(

a

)

Value:

#a

xstr

#define xstr

(

a

)

Value:

str(a)

Function Documentation

bootloader_trap_handler()

void bootloader_trap_handler

(

void

)

Bare-metal Bootloader trap handler. Used for the CLINT timer tick and to capture any other traps.

get_exe_word()

int get_exe_word	(	int	src,
		uint32_t	addr,
		uint32_t *	rdata )

Get word from executable stream.

Parameters

	src	Source of executable stream data. See #EXE_STREAM_SOURCE_enum.
	addr	Address when accessing SPI flash or TWI Device.
[in,out]	rdata	Pointer for returned data (uint32_t).

Returns

0 if success, != 0 if error.

load_exe()

int load_exe

(

int

src

)

Get executable stream.

Parameters

src	Source of executable stream data. See #EXE_STREAM_SOURCE_enum.

Returns

0 if success, != 0 if error.

main()

int main

(

void

)

Bootloader main.

print_help()

void print_help

(

void

)

Print help menu.

put_exe_word()

int put_exe_word	(	int	dst,
		uint32_t	addr,
		uint32_t	wdata )

Put word to executable stream.

Parameters

	dst	Source of executable stream data. See #EXE_STREAM_SOURCE_enum.
	addr	Address when accessing SPI flash or TWI Device.
[in]	wdata	Write data word (uint32_t).

Returns

0 if success, != 0 if error.

save_exe()

void save_exe

(

int

dst

)

Copy memory content as executable to flash.

Parameters

dst	Destination of executable. See #EXE_STREAM_SOURCE_enum.

start_app()

void start_app

(

void

)

Start application program.