mi mi / Mbed 2 deprecated SDFileSystemDMA-test Featured

first

Dependencies:   SDFileSystemDMA mbed

Refer to:
https://developer.mbed.org/users/mimi3/code/SDFileSystemDMA

Caution

If your board has SRAM less than or equal to 8KB, the 'buffer' size must be set to 512 Bytes.

NUCLEO-F411RE
About 2.5MBytes/sec
/media/uploads/mimi3/sdfilesystemdma-speed-test-teraterm-output-f411re.png
NUCLEO-L152RE
About 1MBytes/sec
/media/uploads/mimi3/sdfilesystemdma-l152re-cui.png

main.cpp@4:0719b77970da, 2016-02-13 (annotated)

Committer:
mimi3
Date:
Sat Feb 13 14:04:08 2016 +0000
Revision:
4:0719b77970da
Parent:
3:8b77055a68ec
Child:
5:fef1667b832e
test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mimi3 0:8f297fe0c66a 1 #include "mbed.h"
mimi3 0:8f297fe0c66a 2 #include "SDFileSystemDMA.h"
mimi3 3:8b77055a68ec 3
mimi3 3:8b77055a68ec 4 #define UART_KEY_PRESS 1
mimi3 3:8b77055a68ec 5
mimi3 4:0719b77970da 6 #if defined(TARGET_NUCLEO_F411RE)|| defined(TARGET_F401RE)
mimi3 3:8b77055a68ec 7 #define MOSI D11
mimi3 3:8b77055a68ec 8 #define MISO D12
mimi3 3:8b77055a68ec 9 #define SCLK D13
mimi3 3:8b77055a68ec 10 #define CS D10
mimi3 3:8b77055a68ec 11 #else
mimi3 0:8f297fe0c66a 12 #define MOSI D4
mimi3 0:8f297fe0c66a 13 #define MISO D5
mimi3 0:8f297fe0c66a 14 #define SCLK D3
mimi3 0:8f297fe0c66a 15 #define CS D10
mimi3 3:8b77055a68ec 16 #endif
mimi3 0:8f297fe0c66a 17 //#define CD D9 // detect SD card insertion. Do open always.
mimi3 0:8f297fe0c66a 18 //#define CD_TYPE SDFileSystem::SWITCH_POS_NC // always instertion state
mimi3 3:8b77055a68ec 19 #define SPI_CLOCK_HZ ( 12 * 1000000 )
mimi3 0:8f297fe0c66a 20 Timer timer;
mimi3 1:c39cfc31349d 21 Serial pc(USBTX,USBRX);
mimi3 0:8f297fe0c66a 22
mimi3 3:8b77055a68ec 23 SDFileSystem sd( MOSI, MISO, SCLK, CS, "sd", SPI_CLOCK_HZ);
mimi3 0:8f297fe0c66a 24 //SDFileSystem sd(p5, p6, p7, p8, "sd"); // the pinout on the mbed Cool Components workshop board
mimi3 1:c39cfc31349d 25
mimi3 0:8f297fe0c66a 26 char buffer[512];
mimi3 0:8f297fe0c66a 27 #define X_MEGA_BYTE ((1)*1024*1024) /* 1Mbyte */
mimi3 0:8f297fe0c66a 28 #define FILE_NAME "GPATH"
mimi3 2:f8bd763b5584 29 void wait_key_press(){
mimi3 3:8b77055a68ec 30 #if UART_KEY_PRESS
mimi3 3:8b77055a68ec 31 printf("\n-- Press any key --\n");
mimi3 3:8b77055a68ec 32 fflush(stdout);
mimi3 2:f8bd763b5584 33 while(!pc.readable());
mimi3 2:f8bd763b5584 34 volatile int res = pc.getc();
mimi3 3:8b77055a68ec 35 #else
mimi3 0:8f297fe0c66a 36
mimi3 3:8b77055a68ec 37 #endif
mimi3 0:8f297fe0c66a 38 }
mimi3 0:8f297fe0c66a 39
mimi3 0:8f297fe0c66a 40 void writeTest()
mimi3 0:8f297fe0c66a 41 {
mimi3 0:8f297fe0c66a 42 //Test write performance by creating a 1MB file
mimi3 3:8b77055a68ec 43 printf("[Write]: Testing %dByte buffer: write performance...", sizeof(buffer));
mimi3 3:8b77055a68ec 44 fflush(stdout);
mimi3 0:8f297fe0c66a 45 FileHandle* file = sd.open(FILE_NAME, O_WRONLY | O_CREAT | O_TRUNC);
mimi3 0:8f297fe0c66a 46 if (file != NULL) {
mimi3 0:8f297fe0c66a 47 timer.start();
mimi3 0:8f297fe0c66a 48 for (uint32_t i = 0; i < (X_MEGA_BYTE / sizeof(buffer)); i++) {
mimi3 0:8f297fe0c66a 49 if (file->write(buffer, sizeof(buffer)) != sizeof(buffer)) {
mimi3 0:8f297fe0c66a 50 timer.stop();
mimi3 0:8f297fe0c66a 51 printf("write error!\n");
mimi3 0:8f297fe0c66a 52 timer.reset();
mimi3 0:8f297fe0c66a 53 return;
mimi3 0:8f297fe0c66a 54 }
mimi3 0:8f297fe0c66a 55 }
mimi3 0:8f297fe0c66a 56 timer.stop();
mimi3 0:8f297fe0c66a 57 if (file->close())
mimi3 0:8f297fe0c66a 58 printf("failed to close file!\n");
mimi3 0:8f297fe0c66a 59 else{
mimi3 0:8f297fe0c66a 60 printf("done!\n\tResult: %d KB/s\n", ( 1024 * 1000000 ) / timer.read_us() );
mimi3 0:8f297fe0c66a 61 }
mimi3 0:8f297fe0c66a 62 timer.reset();
mimi3 0:8f297fe0c66a 63 } else {
mimi3 0:8f297fe0c66a 64 printf("failed to create file!\n");
mimi3 0:8f297fe0c66a 65 }
mimi3 0:8f297fe0c66a 66 }
mimi3 0:8f297fe0c66a 67
mimi3 0:8f297fe0c66a 68
mimi3 0:8f297fe0c66a 69 void readTest()
mimi3 0:8f297fe0c66a 70 {
mimi3 0:8f297fe0c66a 71 //Test read performance by reading the 1MB file created by writeTest()
mimi3 3:8b77055a68ec 72 printf("[Read]: Testing %dByte buffer: read performance...", sizeof(buffer));
mimi3 3:8b77055a68ec 73 fflush(stdout);
mimi3 0:8f297fe0c66a 74 FileHandle* file = sd.open(FILE_NAME, O_RDONLY);
mimi3 0:8f297fe0c66a 75 if (file != NULL) {
mimi3 0:8f297fe0c66a 76 timer.start();
mimi3 0:8f297fe0c66a 77 int iterations = 0;
mimi3 0:8f297fe0c66a 78 while (file->read(buffer, sizeof(buffer)) == sizeof(buffer))
mimi3 0:8f297fe0c66a 79 iterations++;
mimi3 0:8f297fe0c66a 80 timer.stop();
mimi3 0:8f297fe0c66a 81 if (iterations != (X_MEGA_BYTE / sizeof(buffer))){
mimi3 0:8f297fe0c66a 82 printf("read error!\n");
mimi3 0:8f297fe0c66a 83 }
mimi3 0:8f297fe0c66a 84 else if (file->close()){
mimi3 0:8f297fe0c66a 85 printf("failed to close file!\n");
mimi3 0:8f297fe0c66a 86 }
mimi3 0:8f297fe0c66a 87 // else if (sd.remove(FILE_NAME))
mimi3 0:8f297fe0c66a 88 // printf("failed to delete file!\n");
mimi3 0:8f297fe0c66a 89 else{
mimi3 0:8f297fe0c66a 90 printf("done!\n\tResult: %d KB/s\n", ( 1024 * 1000000 ) / timer.read_us());
mimi3 0:8f297fe0c66a 91 }
mimi3 0:8f297fe0c66a 92 timer.reset();
mimi3 0:8f297fe0c66a 93 } else {
mimi3 0:8f297fe0c66a 94 printf("failed to open file!\n");
mimi3 0:8f297fe0c66a 95 }
mimi3 0:8f297fe0c66a 96 }
mimi3 0:8f297fe0c66a 97
mimi3 0:8f297fe0c66a 98 int main(){
mimi3 0:8f297fe0c66a 99 /* UART Baudrate is 9600bps*/
mimi3 0:8f297fe0c66a 100 while(1){
mimi3 2:f8bd763b5584 101 printf("\nStart SD card accsess test!");
mimi3 2:f8bd763b5584 102 printf("\nWriting is very slow, wait several minuts.");
mimi3 2:f8bd763b5584 103 wait_key_press();
mimi3 0:8f297fe0c66a 104 writeTest();
mimi3 0:8f297fe0c66a 105 readTest();
mimi3 0:8f297fe0c66a 106 }
mimi3 0:8f297fe0c66a 107 }