Motoo Tanaka / Mbed 2 deprecated test_spi

Another short time hack. This one is for test the behavior of the spi module. Probably an Oscilloscope is required to check the wave.

Dependencies:   mbed

/media/uploads/Rhyme/test_spi.jpg

Another short time hack of mine. To check Mr. J's problem, I needed a way to control SPI in a short time. This is an aid for testing SPI module with an Oscilloscope.

You can specify, frequency, bits, mode and number of loops to let the spi write or read.

For FRDM-KL25Z MOSI: PTD2 MISO: PTD3 SCLK:PTD1

Please set "local echo on" in your terminal program.

某JさんのSPIトラブルの様子を確認するのに、作った簡単なSPIテストプログラムです。 オシロスコープでSPIの挙動を見るためのユティリティです。

FRDM-KL25Zの場合、MOSI(PTD2), MISO(PTD3), SCLK(PTD1) で使っています。

ターミナルプログラムのローカルエコーを有効にしてご使用ください。

SPIモジュールの設定(周波数、ビット、モード、そして読み書きのループ回数を設定できます。)

main.cpp

Committer:
Rhyme
Date:
2014-12-24
Revision:
1:6fdc687abb43
Parent:
0:5fbf51aca95c
Child:
2:3d2009b507f5

File content as of revision 1:6fdc687abb43:

/** Test Spi a quick and dirty spi test program
 */
 
#include "mbed.h"
#include <string.h>
#include <stdio.h>

#define PIN_MOSI        PTD2
#define PIN_MISO        PTD3 
#define PIN_SCLK        PTD1 
#define PIN_CS_TSC      PTA13
#define PIN_TSC_INTR    PTC9

int freq = 1000000 ;
int bits = 8 ;
int mode = 0 ;
int loop = 10 ;

SPI mySpi(PIN_MOSI, PIN_MISO, PIN_SCLK) ;

typedef void (*func_ptr)(void) ;

void doHelp(void) ;
void doStatus(void) ;
void doFreq(void) ;
void doMode(void) ;
void doBit(void) ;
void doWrite(void) ;
void doRead(void) ;
void doLoop(void) ;

typedef struct _cmd_func {
    char *name ;
    func_ptr func ;
} cmd_func_type ;

cmd_func_type cmd_list[] = {
    {"help", doHelp},
    {"status", doStatus},
    {"freq", doFreq},
    {"mode", doMode},
    {"bit",  doBit},
    {"write", doWrite},
    {"read",  doRead},
    {"loop", doLoop},
    { 0, 0 }
} ;

func_ptr getFunc(char *cmd)
{
    int i = 0 ;
    while(cmd_list[i].name != 0) {
        if (strcmp(cmd, cmd_list[i].name) == 0) {
            return(cmd_list[i].func) ; ;
        }
        i++ ;
    }
    return(0) ;
}

void doHello()
{
    printf("=== spi test program ===\n\r") ;
    printf("please set your terminal program\n\r") ;
    printf("local echo on\n\r") ;
    printf("\n\r") ; 
}
    
int main() {
    char cmd[32] ;
    func_ptr func ;
    doHello() ;
    while(1) {
        printf("> ") ;
        scanf("%s", cmd) ;
        if ((func = getFunc(cmd)) != 0) {
            (*func)() ;
        } else {
            doHelp() ;
        }
        printf("\n\r") ;
    }
}

void doHelp(void) 
{
    printf("=== spi test ===\n\r") ;
    printf("commands available\n\r") ;
    printf("help\n\r") ;
    printf("status\n\r") ;
    printf("freq freq_in_hz\n\r") ;
    printf("mode (0 | 1 | 2 | 3)\n\r") ;
    printf("bit (4 - 16)\n\r") ;
    printf("write value\n\r") ;
    printf("read\n\r") ;
    printf("loop number (set repeat number for read/write)\n\r") ;
}

void doStatus(void)
{
    printf("=== Status Report ===\n\r") ;
    printf("bits: %d\n\r", bits) ;
    printf("mode: %d\n\r", mode) ;
    printf("freq: %d Hz\n\r", freq) ;
    printf("loop: %d\n\r", loop) ;
}

void doFreq(void)
{
    int freq = 0 ;
    scanf("%d", &freq) ;
    printf("setting frequency to %d\n\r", freq) ;
    mySpi.frequency(freq) ;
}

void doMode(void)
{
    scanf("%d", &mode) ;
    printf("setting format(%d, %d)\n\r",bits, mode) ;
    mySpi.format(bits, mode) ;       
}

void doBit(void) 
{
    scanf("%d", &bits) ;
    printf("setting format(%d, %d)\n\r",bits, mode) ;
    mySpi.format(bits, mode) ;
}

void doWrite(void) 
{
    int value, i ;
    scanf("%d", &value) ;
    printf("writing value %d\n\r",value) ;
    for (i = 0 ; i < loop ; i++ ) {
        mySpi.write(value) ;
    }
}

void doRead(void) 
{
    int dummy = 0 ;
    int i ;
    int value = 0 ;
    for (i = 0 ; i < loop ; i++ ) {
        value = mySpi.write(dummy) ;
    }
    printf("%d\n", value) ;
}

void doLoop(void)
{
    scanf("%d", &loop) ;
    printf("repeat number has been set to %d\n\r", loop) ;
}