ADC problems with STR5

[michele239955_st]

Posted on April 24, 2007 at 13:02

ADC problems with STR5

[michele239955_st]

Posted on April 24, 2007 at 09:32

I am using the ST sw library to calculate A/D value (for a touch screen). I can read correctly the AD_CHANNEL1 but not the AD_CHANNELL0. The voltage at the A/D micro is correct. I am using the OneShot method but I tried also the Scan. What's wrong in my sw (I attached the main A/D part)?

GPIO_Init(GPIO1, &GPIO_InitStructure);

/* ADC Channel pin configuration */

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3 ;

GPIO_Init(GPIO0, &GPIO_InitStructure);

Delay(10000);

ADC_InitStructure.ADC_ConversionMode = ADC_ConversionMode_OneShot;

ADC_InitStructure.ADC_ExtTrigger = ADC_ExtTrigger_Disable;

ADC_InitStructure.ADC_AutoClockOff = ADC_AutoClockOff_Disable;

ADC_InitStructure.ADC_SamplingPrescaler = 0;

ADC_InitStructure.ADC_ConversionPrescaler = 0;

ADC_InitStructure.ADC_FirstChannel = ADC_CHANNEL0;

ADC_InitStructure.ADC_ChannelNumber = 2;

ADC_Init(&ADC_InitStructure);

Delay(10000);

/* Enable ADC */

ADC_Cmd(ENABLE);

Delay(10000);

/* Start conversion */

ADC_ConversionCmd(ADC_Conversion_Start);

.........................................

while(1) // Main loop

{

....................................

Delay(10000);

y_Touch=ADC_GetConversionValue(ADC_CHANNEL1);

x_Touch=ADC_GetConversionValue(ADC_CHANNEL0);

ADC_ConversionCmd(ADC_Conversion_Start); }

....................................

}

[michele239955_st]

Posted on April 24, 2007 at 13:02

Sorry! There was a stupid sw bug in another part of the program.