RL-ARM User's Guide

Technical Data

The following table gives an overview about the RTX Flash File System performance on different Evaluation Boards.

Board	Device	CPU Core	CPU Speed [MHz]	Card Interface	Write [KB/s]	Read [KB/s]
AT91SAM9260-EK	Atmel AT91SAM9160	ARM9	96.1	SD4 at 25MHz	4785.0	5044.0
AT91SAM9261-EK	Atmel AT91SAM9161	ARM9	96.1	SD4 at 25MHz	4790.6	5069.3
AT91SAM9G20-EK	Atmel AT91SAM9G20	ARM9	99.1	SD4 at 25MHz	4899.5	5418.0
AT91SAM9RL-EK	Atmel AT91SAM9RL64	ARM9	100.0	SD4 at 25MHz	4096.0	5211.2
MCB2400	NXP LPC2468	ARM7	48.0	SD4 at 24MHz	4084.3	5525.9
MCB2300	NXP LPC2368	ARM7	48.0	SD4 at 24MHz	3946.3	5330.6
MCB2140	NXP LPC2148	ARM7	60.0	SPI at 7.5MHz	299.4	313.4
MCBSTR9	ST STR912	ARM9	48.0	SPI at 12MHz	355.2	357.1
MCBSTR750	ST STR750	ARM7	60.0	SPI at 15MHz	402.2	416.1
MCBSTM32	ST STM32	Cortex-M3	72.0	SPI at 18MHz	711.1	758.1
LM3S8962	Luminary LM3S8962	Cortex-M3	50.0	SPI at 12.5MHz	537.8	607.6
LM3S6965	Luminary LM3S6965	Cortex-M3	50.0	SPI at 12.5MHz	539.2	603.6
LM3S3768	Luminary LM3S3768	Cortex-M3	50.0	SPI at 12.5MHz	539.5	603.8

Performance test procedure

Initialize the Card for testing:
- Format the Card
- Open the file "Test.txt"
- Prewrite 4MB of file data with 0x55
- Close and Delete the file
Write performance test:
- Open the file "Test.txt"
Start the measurement timer
- Write 4MB of data in 4KB blocks
Stop the measurement timer
- Close the file
Read performance test:
- Open the file "Test.txt"
Start the measurement timer
- Read 4MB of data in 4KB blocks
Stop the measurement timer
- Close the file
Test validity check:
- Open the file "Test.txt"
- Verify 4MB of data in 4KB blocks
- Close and Delete the file

Note