sdcard_test_mmc_avr.c File Reference

Test program for sd-card with Chan FatFS and customized mmc_avr.c. More...

#include <avr/io.h>
#include <avr/interrupt.h>
#include "ff/ff.h"
#include "ff/diskio.h"
#include "clock/clock.h"
#include "serialF0/serialF0.h"

Macros
#define	F_CPU   32000000UL

Functions
void	init_timer (void)
	Initialize timer/counter C1 as 100 Hz timer. More...
void	demo_ff (void)
	Demonstration. It writes text to a file on the SD-card. After that it reads the file from the SD-card and print the text. This example is code D.2 from 'De taal C en de Xmega' second edition, see Voorbeelden uit 'De taal C en de Xmega' More...
int	main (void)
	main routine for testting sdmm.c More...
	ISR (TCC1_OVF_vect)
	Timer Interrupt that triggers disk_timerproc() More...

Detailed Description

Test program for sd-card with Chan FatFS and customized mmc_avr.c.

Author

Wim Dolman (w.e.dolman@hva.nl)

Date

11-03-2020

Version

1.5

This implementation needs a timer for the necessary delays.

Usage with Atmel Studio.
This example uses the serialF0, see https://dolman-wim.nl/xmega/libraries/online/serialF0/html/index.html and the clock functions, see https://dolman-wim.nl/xmega/libraries/online/clock/html/index.html In the project directory uses three subfolders: clock, ff, and serialF0.

1. Make an Atmel Studio project
2. Add three subfolders (use New Folder...) to the project : clock, ff, and serialF0
3. Place the necessary files in the Atmel Studio project folder/subfolders

   clock/clock.c	Clock functions
   clock/clock.h	Clock functions
   serialF0/serialF0.c	Serial interface
   serialF0/serialF0.h	Serial interface
   ff/ff.c	Latest version from Chan's Library
   ff/ff.h	Latest version from Chan's Library
   ff/ffconf.h	Latest version from Chan's Library
   ff/diskio.h	Version 2014 from Chan's avr releases 11a
   ff/ mmc_avr.c	Customized version Chan's Sample avr releases 11a/12
   sdcard_test_mmc_avr.c	This example
   demo_ff.c	function with demo SD-card

4. Add all c-files to the project
5. Change these four defines in ffconf.h

              #define FF_USE_STRFUNC  2
              #define FF_USE_CHMO     1
              #define FF_FS_NORTC     1
              #define FF_USE_LFN      0 

You can place the library files also directly in the project folder or in an other folder. In that case you need to change the path in the #include lines.

This test program is based on the example D.2 and D.3 from 'De taal C en de Xmega' 2nd edition.

Macro Definition Documentation

F_CPU

#define F_CPU   32000000UL

Function Documentation

demo_ff()

void demo_ff

(

void

)

Demonstration. It writes text to a file on the SD-card. After that it reads the file from the SD-card and print the text. This example is code D.2 from 'De taal C en de Xmega' second edition, see Voorbeelden uit 'De taal C en de Xmega'

Returns

void

init_timer()

void init_timer

(

void

)

Initialize timer/counter C1 as 100 Hz timer.

Returns

void

ISR()

ISR

(

TCC1_OVF_vect

)

Timer Interrupt that triggers disk_timerproc()

Returns

void

main()

int main

(

void

)

main routine for testting sdmm.c

It initialize the clock, the streams, the toimer, set the global interrupts and run the demo program once.

Returns

int