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stm3210e eval board adc question
- From: jayant biswas <biswasj at gmail dot com>
- To: ecos-discuss at ecos dot sourceware dot org
- Date: Tue, 12 Apr 2011 17:27:02 +0200
- Subject: [ECOS] stm3210e eval board adc question
Hello everyone!
I am new to this list and to ecos and the stm32 and am looking for
some help in reading from ADC inputs.
Here is the test program I have used to see if I can read the inputs.
I am able to read the normal input from the user key on the board, but
I am not able to read the analog input. pot_val is always 0. I test my
program by holding on to the user key and changing the potentiometer
position and then hitting reset. Do you have any ideas?
/* this is a simple hello world program */
#include <stdio.h>
#include <cyg/hal/hal_io.h>
#define CYGHWR_POT CYGHWR_HAL_STM32_GPIO(C, 4, IN, ANALOG)
#define CYGHWR_BUT CYGHWR_HAL_STM32_GPIO(G, 8, IN, FLOATING)
int cyg_user_start(void)
{
cyg_int32 pot_val = 10;
cyg_int32 but_val = 10;
printf("Hello, eCos world!\n");
CYGHWR_HAL_STM32_GPIO_SET(CYGHWR_POT);
CYGHWR_HAL_STM32_GPIO_SET(CYGHWR_BUT);
CYGHWR_HAL_STM32_GPIO_IN(CYGHWR_POT, &pot_val);
CYGHWR_HAL_STM32_GPIO_IN(CYGHWR_BUT, &but_val);
printf("Potentiometer value is %d, button value is %d\n", pot_val, but_val);
while(1);
return 0;
}
I wasn't able to enable the cdl component CYGPKG_IO_ADC_DEVICES in my
ecos config as it wasn't available.
I have an STM3210E Eval board and am using it with an Amontec JTAG
key. I used the default stm3210e template and changed the target to
ROM. I load the program directly to the ROM so I am not using anything
like Redboot.
Thank you in advance for your help!
Jayant
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