ADC scan mode not working correctly on STM8S105C6 test board.

[Abhishek_Sabnis]

I would like to use 2 ADC channel in my program (0,3) using STM8S105C6. I tried to use ADC scan mode and tried to read buffer. it seems that it reads channel 0 and channel 3 for the first run but with change in analog volatge on both channels , only channel 0 gets updated to new only where channel 3 still shows old value.

here is snippet of code:

#include "STM8S.h"

#include "stm8s_delay.h" 

#include "stm8s_tim3.h"

unsigned char bl_state;

unsigned char data_value;

unsigned char SampleCount;

void clock_setup(void);

void GPIO_setup(void);

void ADC1_setup(void);

void main()

{

unsigned int A0 = 0x0000;

unsigned int A1 = 0x0000;

float mv =0x0000000;

float mv1 =0x0000000;

float b1; 

float b2;

clock_setup();

GPIO_setup();

ADC1_setup();

while(TRUE)

{

SampleCount = 0;

A0=0;

A1=0;

while(SampleCount < 10)

{

ADC1_ScanModeCmd(ENABLE);

ADC1_StartConversion();

while(ADC1_GetFlagStatus(ADC1_FLAG_EOC) == FALSE);

ADC1_ClearFlag(ADC1_FLAG_EOC);

A0 += ADC1_GetBufferValue(0);

A1 += ADC1_GetBufferValue(1);

SampleCount++;

}

mv= A0*0.000322;

mv1= A1*0.000322;

if((mv >=1.5)&&(mv1>=1.5))

GPIO_WriteLow(GPIOD, GPIO_PIN_0);

else

GPIO_WriteHigh(GPIOD, GPIO_PIN_0);

delay_ms(90);

};

}

void clock_setup(void)

{

CLK_DeInit();

CLK_HSECmd(DISABLE);

CLK_LSICmd(DISABLE);

CLK_HSICmd(ENABLE);

while(CLK_GetFlagStatus(CLK_FLAG_HSIRDY) == FALSE);

CLK_ClockSwitchCmd(ENABLE);

CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV4);

CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1);

CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO, CLK_SOURCE_HSI, 

DISABLE, CLK_CURRENTCLOCKSTATE_ENABLE);

CLK_PeripheralClockConfig(CLK_PERIPHERAL_I2C, ENABLE);

CLK_PeripheralClockConfig(CLK_PERIPHERAL_ADC, ENABLE);

CLK_PeripheralClockConfig(CLK_PERIPHERAL_SPI, DISABLE);

CLK_PeripheralClockConfig(CLK_PERIPHERAL_AWU, DISABLE);

CLK_PeripheralClockConfig(CLK_PERIPHERAL_UART1, DISABLE);

CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER1, DISABLE);

CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER2, DISABLE);

CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER4, DISABLE);

}

void GPIO_setup(void)

{

GPIO_DeInit(GPIOB);

GPIO_Init(GPIOB, ((GPIO_Pin_TypeDef)(GPIO_PIN_0| GPIO_PIN_1)), GPIO_MODE_IN_FL_NO_IT);

GPIO_DeInit(GPIOD);

GPIO_Init(GPIOD, GPIO_PIN_0, GPIO_MODE_OUT_OD_HIZ_FAST);

GPIO_DeInit(GPIOC);

GPIO_Init(GPIOC, ((GPIO_Pin_TypeDef)GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4), GPIO_MODE_OUT_PP_LOW_FAST);

}

void ADC1_setup(void)

{

ADC1_DeInit();

ADC1_Init(ADC1_CONVERSIONMODE_CONTINUOUS, //PB0 = LOAD_V_FBK = OUTPUT VOLTAGE 

 ADC1_CHANNEL_0,

 ADC1_PRESSEL_FCPU_D18, 

 ADC1_EXTTRIG_GPIO, 

 DISABLE, 

 ADC1_ALIGN_RIGHT, 

 ADC1_SCHMITTTRIG_CHANNEL0, 

 DISABLE);

ADC1_Init(ADC1_CONVERSIONMODE_CONTINUOUS, //PB1 = BTV_ADC = BATTERY TERMINAL VOLTAGE

 ADC1_CHANNEL_1,

 ADC1_PRESSEL_FCPU_D18, 

 ADC1_EXTTRIG_GPIO, 

 DISABLE, 

 ADC1_ALIGN_RIGHT, 

 ADC1_SCHMITTTRIG_CHANNEL1, 

 DISABLE);

ADC1_ConversionConfig(ADC1_CONVERSIONMODE_CONTINUOUS, 

((ADC1_Channel_TypeDef)(ADC1_CHANNEL_0 | ADC1_CHANNEL_1)), 

ADC1_ALIGN_RIGHT);

ADC1_DataBufferCmd(ENABLE);

ADC1_Cmd(ENABLE);

}