I'm trying to generate a simple analog output signal. I'm checking pin number 4 (and other pins) on the connector but I can't find 1V anywhere. What I'm doing wrong? Please help, I've tried also the examples from STDIO library, with no success.
This is my code:
/* Includes ------------------------------------------------------------------*/
#include "circle_api.h"
#include "stm32f10x.h"
#include "stm32f10x_type.h"
#include "stm32f10x_dac.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#define __STM32F10x_H
/* Private defines -----------------------------------------------------------*/
// The following should be the minimal CircleOS version needed by your application
#define NEEDEDVERSION "V 3.7"
/* Private functions ---------------------------------------------------------*/
static enum MENU_code MsgVersion(void);
/* Public variables ----------------------------------------------------------*/
const char Application_Name[8+1] = {"dac"}; // Max 8 characters
uint16_t Sal;
/*******************************************************************************
* Function Name : Application_Ini
* Description : Initialization function of Circle_App. This function will
* be called only once by CircleOS.
* Input : None
* Return : MENU_CONTINUE_COMMAND
*******************************************************************************/
enum MENU_code Application_Ini(void)
{
// Ensure that the current OS version is recent enough
if(strcmp(UTIL_GetVersion(), NEEDEDVERSION) < 0)
{
return MsgVersion(); }
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOA, &GPIO_InitStructure);
return MENU_CONTINUE_COMMAND;
}
/*******************************************************************************
* Function Name : Application_Handler
* Description : Management of the Circle_App.
*
* Input : None
* Return : MENU_CONTINUE
*******************************************************************************/
enum MENU_code Application_Handler(void)
{
DAC_DeInit();
DAC_InitTypeDef DAC_InitStructure;
DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bits11_0;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1, &DAC_InitStructure);
DAC_Cmd(DAC_Channel_1, ENABLE);
DAC_SetChannel1Data(DAC_Align_12b_R, 0x0500);
#if 1
// If the button is pressed, the application is exited
if(BUTTON_GetState() == BUTTON_PUSHED)
{
BUTTON_WaitForRelease();
return MENU_Quit();
}
#endif
return MENU_CONTINUE; // Returning MENU_LEAVE will quit to CircleOS
}
/*******************************************************************************
* Function Name : MsgVersion
* Description : Display the current CircleOS version and the version needed
* exit to main menu after 4 secondes
*
* Input : None
* Return : MENU_REFRESH
*******************************************************************************/
static enum MENU_code MsgVersion(void)
{
int hh,mm,ss,ss2;
DRAW_DisplayString(5,60,"CircleOS",17);
DRAW_DisplayString(80,60,UTIL_GetVersion(),6);
DRAW_DisplayString(5,34,NEEDEDVERSION,6);
DRAW_DisplayString(50,34," required",12);
RTC_GetTime( &hh, &mm, &ss);
ss = ss + 4; // 4 secondes
ss = ss%60;
do
{
RTC_GetTime( &hh, &mm, &ss2 );
}
while ( ss2 != ss ); // do while < 4 secondes
DRAW_Clear();
return MENU_REFRESH;
}
