Interrupt works fine, problem is in non-interrupt mode
Okay I’m using the code from the repository Project: ADC → Illumination_RGBLED
and I modified the ADC_Read(ADC_CH num) function to return the value of the ADC_INT register after the conversion has started
I have the same result ADC_INT does not change the value is always zero
printf(" Start conversion ADC_INT value = %d\r\n",ADC_Read(ADC_CH0)); // function ADC_Read(x) start conversion and return ADC->ADC_INT register
delay_ms(100); // wait to end conversion
printf(" END conversion ADC_INT value = %d\r\n",ADC->ADC_INT); // end conversion read ADC->ADC_INT register
All Code :
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/**
******************************************************************************
* @file ADC/Illumination_RGBLED/main.c
* @author IOP Team
* @version V1.0.0
* @date 25-AUG-2015
* @brief Main program body
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, WIZnet SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>© COPYRIGHT 2015 WIZnet Co.,Ltd.</center></h2>
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include <stdio.h>
#include "W7500x.h"
#include "W7500x_adc.h"
#include "W7500x_uart.h"
#include "W7500x_gpio.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
int sensorValue;
int ADC_INT_STATUS;
int color = 1;
char on = 0;
/* Private function prototypes -----------------------------------------------*/
void UART_Configuration(void);
void delay_ms(__IO uint32_t nCount);
void on_off_rgb(unsigned int color);
int ADC_Read(ADC_CH num);
void GPIO_Setting(void);
static uint32_t counter = 0x00;
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main()
{
/*System clock configuration*/
SystemInit();
/* GPIO configuration */
GPIO_Setting();
/* UART configuration */
UART_Configuration();
printf("***** Illumination sensor & rgb led *****\r\n");
printf("*********** WIZnet ***********\r\n");
// ADC initialize
ADC_Init();
while(1) {
printf(" Start conversion ADC_INT value = %d\r\n",ADC_Read(ADC_CH0)); // function ADC_Read(x) start conversion and return ADC->ADC_INT register
delay_ms(100); // wait to end conversion
printf(" END conversion ADC_INT value = %d\r\n",ADC->ADC_INT); // end conversion read ADC->ADC_INT register
if (sensorValue < 3000) {
on_off_rgb(0);
if (on == 1)
color ++;
on = 0;
if (color == 8)
color = 1;
}
else {on_off_rgb(color); on = 1; }
delay_ms(100);
}
}
void delay_ms(__IO uint32_t nCount)
{
volatile uint32_t delay = nCount * 2500; // approximate loops per ms at 24 MHz, Debug config
for(; delay != 0; delay--)
__NOP();
}
void on_off_rgb(unsigned int color)
{
// R : PC_00, G : PC_04, B : PC_05
if (color%2) GPIO_SetBits(GPIOC, GPIO_Pin_0); else GPIO_ResetBits(GPIOC, GPIO_Pin_0);
if ((color>>1)%2) GPIO_SetBits(GPIOC, GPIO_Pin_4); else GPIO_ResetBits(GPIOC, GPIO_Pin_4);
if ((color>>2)%2) GPIO_SetBits(GPIOC, GPIO_Pin_5); else GPIO_ResetBits(GPIOC, GPIO_Pin_5);
}
int ADC_Read(ADC_CH num)
{
ADC_ChannelSelect (num); ///< Select ADC channel to CH0
ADC_Start(); ///< Start ADC
// while(ADC_IsEOC()); ///< Wait until End of Conversion
return ADC->ADC_INT;//< return ADC_INT status //((uint16_t)ADC_ReadData()); ///< read ADC Data
}
void GPIO_Setting(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/*GPIO Configuration for red,green,blue LED */
PAD_AFConfig(PAD_PC,GPIO_Pin_0,PAD_AF1); ///< PAD Config - RED LED used 2nd Function
PAD_AFConfig(PAD_PC,GPIO_Pin_4,PAD_AF1); ///< PAD Config - GREEN LED used 2nd Function
PAD_AFConfig(PAD_PC,GPIO_Pin_5,PAD_AF1); ///< PAD Config - BLUE LED used 2nd Function
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_4 | GPIO_Pin_5; ///< Connecting GPIO_Pin_0(R),4(G),5(B)
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; ///< Set to GPIO Mode to Output Port
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
void UART_Configuration(void)
{
UART_InitTypeDef UART_InitStructure;
/* UART Configuration for UART1*/
UART_StructInit(&UART_InitStructure);
UART_Init(UART1,&UART_InitStructure);
S_UART_Init(115200);
}
