#include "port.h"
#include "systick.h"

static ADC_InitStruType x;
static GPIO_InitSettingType y;
static bool adccapture_error = false;

static uint16_t prv_adc_get_value() {
  ErrorStatus status = ADC_SoftStart();
  adccapture_error = false;
  if (status != SUCCESS) {
    adccapture_error = true;
    return 0;
  }
  uint32_t inticket = get_sys_ticket();

  while (ADC_GetConvStatus() != RESET) {
    if (port_haspassedms(inticket) > 10) {
      adccapture_error = true;
      return 0;
    }
  }
  uint16_t adcv = ADC_GetConvValue();
  ADC_SoftStop();
  return adcv ;
}

static void prv_adc_pb9_init() {
  y.Signal = GPIO_Pin_Signal_Analog;  //模拟
  y.Dir = GPIO_Direction_Input;       //输入
  y.Func = GPIO_Reuse_Func0;
  // x.CHS设置adc采集的通道每个引脚对应一个通道
  GPIO_Init(GPIO_Pin_B9, &y);

  //经过分频以后Tadclk=1/(PCLK/32)
  x.CLKS = ADC_CLKS_PCLK;
  x.CLKDIV = ADC_CLKDIV_1_32; /* ADC时钟源预分频 */

  //采集到的模拟量*3.3/4096=现在的电压
  x.VREF_SEL = ADC_VREF_SEL_0; /* 内部参考电压2.048v,仅设置内部参考电压为多少 */
  x.VREFP = ADC_VREFP_VDD; /* 选择芯片的工作电压VDD，这个是设置adc具体是要哪个电压来做参考adc的参考电压为多少 */
  x.VREFN = ADC_VREFN_VSS; /* 负向参考电压选择 */
  x.CHS = ADC_CHS_AIN4;
  // x.CHS = ADC_CHS_AIN8;
  x.SMPS = ADC_SMPS_SOFT; /* AD采样模式为软件控制 */
  //采样时间st*2+1(个Tadclk)=1.743us
  x.ST = 0;                /* AD硬件采样时间选择 */
  x.BITSEL = ADC_BITSEL_8; /* AD分辨率12位 */
  ADC_Init(&x);
  prv_adc_get_value();
}

extern uint32_t getCNT();
extern uint32_t getTOP();

uint16_t capture(int timeoff) {
  static bool inited = false;
  if (inited == false) {
    prv_adc_pb9_init();
    inited = true;
  }

  uint16_t expectCNTBegin = getTOP() / 100.0 * timeoff;
  uint16_t expectCNTEnd = getTOP() / 100.0 * (timeoff + 1);
//   printf("%d %d , %d\n", timeoff, expectCNTBegin, expectCNTEnd);

  int icount = 0;
  while (true) {
    volatile uint16_t countnow = T16Nx_GetCNT1(T16N0);
    // printf("%d\n",countnow);
    for (size_t i = 0; i < icount % 10; i++) {
    }
    icount++;

    if (countnow >= expectCNTBegin && countnow < expectCNTEnd) {
      break;
    }
  }

  uint16_t v = prv_adc_get_value();
  return v;
}