bmp_ssp.c File Reference

Synchronous Serial Port (SSP) peripheral handling for BC&MP. More...

#include "lpc17xx.h"
#include "lpc17xx_clkpwr.h"
#include "lpc17xx_ssp.h"
#include "bmp.h"

Macros
#define	SSP0_CLK   25000000
	SSP0 clock: 25 MHz.
#define	SSP1_CLK_H   25000000
	SSP1 clock: 25 MHz (fast)
#define	SSP1_CLK_L   5000000
	SSP1 clock: 5 MHz (slow)

Functions
static void	delay (uint32_t n)
	Simple delay (~30ns per loop?)
void	ssp1_copy (uint32_t count, const uint8_t *buf)
	Copy buffer to FPGAs.
void	fpga_word (uint32_t addr, uint32_t fpga, uint32_t *buf, uint32_t dir)
	Read or write an FPGA.
static void	ssp0_send (uint32_t d)
	Send word to Serial Flash.
void	ssp0_write (uint32_t cmd, uint32_t addr, uint32_t len, const uint8_t *buf)
	Write buffer to Serial Flash.
void	ssp0_read (uint32_t cmd, uint32_t addr, uint32_t len, uint8_t *buf)
	Read buffer from Serial Flash.
void	ssp0_copy (uint32_t addr, uint32_t len)
	Copy from Serial Flash on SSP0 to FPGA(s) on SSP1.
void	sf_write (uint32_t addr, uint32_t len, const uint8_t *buf)
	Write to flash.
void	sf_read (uint32_t addr, uint32_t len, uint8_t *buf)
	Read from flash.
uint32_t	sf_crc32 (uint32_t addr, uint32_t len)
	Compute CRC of data on flash.
void	ssp1_slow (void)
	Configure SSP1 to be slow.
void	ssp1_fast (void)
	Configure SSP1 to be fast.
void	configure_ssp (void)
	Configure SSP (serial flash, FPGAs)

Detailed Description

Synchronous Serial Port (SSP) peripheral handling for BC&MP.

Copyright

© The University of Manchester - 2012-2015

Author

Steve Temple, APT Group, School of Computer Science

SSP1 is connected to the FPGAs and is used to load their bitmaps. It can also be used to communicate with the FPGAs when the FPGA code supports this function.

SSP0 is connected to a serial Flash device which currently holds two areas of data. The area at 0 is the SpiNNaker IP address block which is read by the root chip when it is reset. A buffer and software multiplexer dual-port the serial Flash. It can currently only be written by the BMP. The second area holds the FPGA bitmap and starts at 0x10000. This is loaded whenever power is applied to the FPGAs

Function Documentation

delay()

static void delay ( uint32_t  n )

static

Simple delay (~30ns per loop?)

Parameters

[in]

n

Number of times to loop

ssp1_copy()

void ssp1_copy	(	uint32_t	count,
		const uint8_t *	buf
	)

Copy buffer to FPGAs.

Parameters

[in]	count	Number of bytes in buf to copy
[in]	buf	Buffer containing data to copy

fpga_word()

void fpga_word	(	uint32_t	addr,
		uint32_t	fpga,
		uint32_t *	buf,
		uint32_t	dir
	)

Read or write an FPGA.

Parameters

[in]	addr	Where on the FPGA to access
[in]	fpga	Which FPGA to access
[in,out]	buf	Buffer; contains word to write to FPGA, or is location to put word read from FPGA
[in]	dir	Reading (FPGA_READ) or writing (FPGA_WRITE)

ssp0_send()

static void ssp0_send ( uint32_t  d )

static

Send word to Serial Flash.

Parameters

[in]

d

Word to send

ssp0_write()

void ssp0_write	(	uint32_t	cmd,
		uint32_t	addr,
		uint32_t	len,
		const uint8_t *	buf
	)

Write buffer to Serial Flash.

Parameters

[in]	cmd	Command for SSP0
[in]	addr	Where to write to
[in]	len	How many bytes to write
[in]	buf	Buffer of bytes to write

ssp0_read()

void ssp0_read	(	uint32_t	cmd,
		uint32_t	addr,
		uint32_t	len,
		uint8_t *	buf
	)

Read buffer from Serial Flash.

Parameters

[in]	cmd	Command for SSP0
[in]	addr	Where to read from
[in]	len	How many bytes to read
[out]	buf	Buffer to receive read bytes

ssp0_copy()

void ssp0_copy	(	uint32_t	addr,
		uint32_t	len
	)

Copy from Serial Flash on SSP0 to FPGA(s) on SSP1.

Parameters

[in]	addr	Address of data to move (same address used for all)
[in]	len	Length of data to move

sf_write()

void sf_write	(	uint32_t	addr,
		uint32_t	len,
		const uint8_t *	buf
	)

Write to flash.

Parameters

[in]	addr	Where to write to
[in]	len	How many bytes to write
[in]	buf	The data to write

sf_read()

void sf_read	(	uint32_t	addr,
		uint32_t	len,
		uint8_t *	buf
	)

Read from flash.

Parameters

[in]	addr	Where to read from
[in]	len	How many bytes to read
[out]	buf	The buffer receiving the data

sf_crc32()

uint32_t sf_crc32	(	uint32_t	addr,
		uint32_t	len
	)

Compute CRC of data on flash.

Parameters

[in]	addr	Where the data is
[in]	len	The length of the data

Returns

CRC of the data