ADC1单扫描转换ADC2始终为0

大家好，

在复位后第一次运行期间进行ADC1单次扫描转换（ADC0至ADC2通道）时，ADC2始终为0（ADC1和0均为正常）。接下来和接下来的几组读数都可以。它在STM8S Discovery（STM8S105C6）上进行测试。码：
“”
ADC_Config（）;
ADC1_StartConversion（）;
while（ADC1_GetFlagStatus（ADC1_FLAG_EOC）！= RESET）
;
HS_buffer [0] = ADC1_GetBufferValue（2）;
SU_buffer [0] = ADC1_GetBufferValue（1）;
U_steu = ADC1_GetBufferValue（0）;
ADC1_DeInit（）;
“”
其中ADC_config（）：
“”
ADC1_DeInit（）; / * De-Init ADC外设* /
/ * Init ADC2外设* /
ADC1_ScanModeCmd（ENABLE）;
ADC1_Init（ADC1_CONVERSIONMODE_SINGLE，ADC1_CHANNEL_2，ADC1_PRESSEL_FCPU_D2，
ADC1_EXTTRIG_tiM，DISABLE，ADC1_ALIGN_RIGHT，
ADC1_SCHMITTTRIG_CHANNEL0 | ADC1_SCHMITTTRIG_CHANNEL1 | ADC1_SCHMITTTRIG_CHANNEL2，
DISABLE）;
“”
当我（在有问题的第一次运行期间）设置断点时
''HS_buffer [0] = ADC1_GetBufferValue（2）;''并执行步骤 - 结果正常。

我在重置后通过虚拟读取来解决它，但我想知道原因。
谢谢。
#stm8＃adc1＃single-scan



以下为原文




Hello everybody,

when doing ADC1 single scan conversion (ADC0 to ADC2 channels) during the first run after reset the ADC2 is always 0 (ADC1 and 0 are OK). The next and following sets of readings are then all OK. It is tested on STM8S Discovery (STM8S105C6). Code:
''
     ADC_Config();
     ADC1_StartConversion();
     while( ADC1_GetFlagStatus(ADC1_FLAG_EOC) != RESET)
      ;
     HS_buffer[0] = ADC1_GetBufferValue(2);
     SU_buffer[0] = ADC1_GetBufferValue(1);
     U_steu = ADC1_GetBufferValue(0);
     ADC1_DeInit();
''
where ADC_config():
''
  ADC1_DeInit();/* De-Init ADC peripheral*/
   /* Init ADC2 peripheral */
  ADC1_ScanModeCmd(ENABLE);
  ADC1_Init(ADC1_CONVERSIONMODE_SINGLE, ADC1_CHANNEL_2, ADC1_PRESSEL_FCPU_D2,  
             ADC1_EXTTRIG_TIM, DISABLE, ADC1_ALIGN_RIGHT,
       ADC1_SCHMITTTRIG_CHANNEL0 | ADC1_SCHMITTTRIG_CHANNEL1 | ADC1_SCHMITTTRIG_CHANNEL2,
             DISABLE);
''
When I (during the problematic first run) set breakpoint on the  
''HS_buffer[0] = ADC1_GetBufferValue(2);'' and do step- the result is OK.

I solve it by dummy reading after reset, but I would like to know the reason.  
Thank You.  
#stm8 #adc1 #single-scan