#include "soft_i2c.h"
#include "delay.h"
#include "ti_msp_dl_config.h"

#define DELAY 1
#define SDA_PIN_SHIFT 9 // if pa.8 shift8  ,  if pa.9 shift 9
void I2C_ENABLE_OUTPUT_SDA(void) {
  DL_GPIO_initDigitalOutput(SOFT_I2C_SDA_IOMUX);
  DL_GPIO_enableOutput(SOFT_I2C_PORT, SOFT_I2C_SDA_PIN);
}
void I2C_ENABLE_INPUT_SDA(void) {
  DL_GPIO_disableOutput(SOFT_I2C_PORT, SOFT_I2C_SDA_PIN);
  DL_GPIO_initDigitalInputFeatures(
      SOFT_I2C_SDA_IOMUX, DL_GPIO_INVERSION_DISABLE, DL_GPIO_RESISTOR_PULL_UP,
      DL_GPIO_HYSTERESIS_DISABLE, DL_GPIO_WAKEUP_DISABLE);
}

void I2C_W_SCL(uint8_t BitValue) {
  if (BitValue) {
    DL_GPIO_setPins(SOFT_I2C_PORT, SOFT_I2C_CLK_PIN);

  } else {
    DL_GPIO_clearPins(SOFT_I2C_PORT, SOFT_I2C_CLK_PIN);
  }
  delay_us(DELAY);
}

void I2C_W_SDA(uint8_t BitValue) {
  if (BitValue) {
    DL_GPIO_setPins(SOFT_I2C_PORT, SOFT_I2C_SDA_PIN);

  } else {
    DL_GPIO_clearPins(SOFT_I2C_PORT, SOFT_I2C_SDA_PIN);
  }
  delay_us(DELAY);
}

// 读取时钟线数据
uint8_t I2C_R_SDA(void) {
  uint32_t BitValue;
  BitValue = DL_GPIO_readPins(SOFT_I2C_PORT, SOFT_I2C_SDA_PIN);

  return (uint8_t)(BitValue >> 9);
}

void I2C_Start(void) {
  I2C_W_SCL(1);
  I2C_W_SDA(1);
  I2C_W_SDA(0);
  I2C_W_SCL(0);
}

void I2C_Stop(void) {
  I2C_W_SDA(0);
  I2C_W_SCL(1);
  I2C_W_SDA(1);
}

void I2C_SendByte(uint8_t Byte) {
  uint8_t i;

  for (i = 0; i < 8; i++) {
    I2C_W_SDA(Byte & (0x80 >> i));
    I2C_W_SCL(1);
    I2C_W_SCL(0);
  }
}

uint8_t I2C_RecviveData(void) {
  uint8_t i, Byte = 0x00;
  I2C_W_SDA(1);
  for (i = 0; i < 8; i++) {
    I2C_ENABLE_INPUT_SDA();
    I2C_W_SCL(1);
    if (I2C_R_SDA() == 1) {
      Byte |= (0x80 >> i);
    }
    I2C_W_SCL(0);
    I2C_ENABLE_OUTPUT_SDA();
  }
  return Byte;
}

void I2C_SendAck(uint8_t AckBit) {

  I2C_W_SDA(AckBit);
  I2C_W_SCL(1);
  I2C_W_SCL(0);
}

uint8_t I2C_RecviveAck(void) {
  uint8_t AckBit;

  I2C_W_SDA(1);
  I2C_ENABLE_INPUT_SDA();
  I2C_W_SCL(1);

  AckBit = I2C_R_SDA();
  I2C_W_SCL(0);
  I2C_ENABLE_OUTPUT_SDA();

  return AckBit;
}