Complete data reading

# Conflicts:
#	inc/LDC1612.h
#	src/main.c

inc/LDC1612.h

@@ -12,6 +12,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <math.h>
 
 #define LDC1612_ADDR         (0x2B << 1)
 
@@ -35,6 +36,24 @@
 
 /******************************************************************************/
 
+#define CHANNEL_0  0
+#define CHANNEL_1  1
+
+/******************************************************************************/
+
+#define LDC1612_CONVERSION_TIME_CH0        0X0546  //0536
+#define LDC1612_DRIVE_CURRENT              0X9000  //A000
+#define LDC1612_MUX_CONFIG                 0X020C  // no auto scan and filter bandwidth 3.3MHz
+#define LDC1612_SENSOR_CONFIG              0X1601
+#define LDC1612_ERROR_CONFIG               0x0000
+#define LC_STABILIZE_TIME_CH0              0X001E //30
+
+/******************************************************************************/
+
+#define COIL_RP_KOM  15.727
+#define COIL_L_UH    33
+#define COIL_C_PF    150
+#define COIL_Q_FACTOR  35.97
 
 typedef enum {
     I2C_START = 0,
@@ -44,8 +63,13 @@ typedef enum {
     I2C_STOP
 } i2c_process_enum;
 
-#define I2C_SPEED 100000
+#define I2C_TIME_OUT    (uint16_t)(10000)
-#define RCU_IR_GPIO RCU_GPIOF
+#define I2C_OK          1
+#define I2C_FAIL        0
+#define I2C_END         1
+
+#define I2C_SPEED 20000
+#define RCU_GPIO_I2C RCU_GPIOF
 #define RCU_I2C RCU_I2C0
 #define I2C_SCL_PORT GPIOF
 #define I2C_SCL_PIN GPIO_PIN_1
@@ -53,13 +77,46 @@ typedef enum {
 #define I2C_SDA_PIN GPIO_PIN_0
 #define I2C_GPIO_AF GPIO_AF_1
 
-#define I2C_TIME_OUT    (uint16_t)(10000)
+void i2c_gpio_config(void);
 
-void I2C_config(void);
+void i2c_config(void);
-void I2C_scan(void);
 
-int LDC1612_IIC_read_16bits(void);
+void i2c_bus_reset(void);
 
+void i2c_scan(void);
 
+void ldc1612_set_conversion_time(uint8_t channel, uint16_t result);
+
+void ldc1612_set_conversion_offset(uint8_t channel, uint16_t result);
+
+void ldc1612_set_LC_stabilize_time(uint8_t channel, uint16_t result);
+
+void ldc1612_set_freq_divide(uint8_t channel);
+
+void ldc1612_set_error_config(uint16_t value);
+
+void ldc1612_set_mux_config(uint16_t value);
+
+void ldc1612_reset_sensor(void);
+
+void ldc1612_set_drive_current(uint8_t channel, uint16_t value);
+
+void ldc1612_set_sensor_config(uint16_t value);
+
+void ldc1612_single_ch0_config(void);
+
+void ldc1612_iic_get_sensor_infomation(void);
+
+uint16_t ldc1612_get_manufacturer_id(void);
+
+uint16_t ldc1612_get_deveice_id(void);
+
+uint32_t ldc1612_get_raw_channel_result(uint8_t channel);
+
+uint32_t ldc1612_parse_raw_result(uint32_t raw_result);
+
+uint8_t ldc1612_iic_read_16bits(uint8_t reg_addr, uint8_t *data);
+
+uint8_t ldc1612_iic_write_16bits(uint8_t reg_addr, uint8_t data[2]);
 
 #endif //LDC1612_H

inc/main.h

@@ -43,7 +43,5 @@ OF SUCH DAMAGE.
 #define LED_IRQ             TIMER16_IRQn
 
 void led_config(void);
-void iicSendData(void);
-void iicReceiveData(void);
 
 #endif /* MAIN_H */

src/LDC1612.c

@@ -4,38 +4,78 @@
 
 #include "LDC1612.h"
 
+/*!
+    \brief      configure the GPIO ports
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void i2c_gpio_config(void) {
+    /* enable IIC GPIO clock */
+    rcu_periph_clock_enable(RCU_GPIO_I2C);
 
-
+    /* connect I2C_SCL_PIN to I2C_SCL */
-void I2C_config(void) {
-    rcu_periph_clock_enable(RCU_IR_GPIO);
-    rcu_periph_clock_enable(RCU_I2C);
-
     gpio_af_set(I2C_SCL_PORT, I2C_GPIO_AF, I2C_SCL_PIN);
+    /* connect I2C_SDA_PIN to I2C_SDA */
     gpio_af_set(I2C_SDA_PORT, I2C_GPIO_AF, I2C_SDA_PIN);
-
+    /* configure GPIO pins of I2C */
     gpio_mode_set(I2C_SCL_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, I2C_SCL_PIN);
     gpio_output_options_set(I2C_SCL_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SCL_PIN);
-
     gpio_mode_set(I2C_SDA_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, I2C_SDA_PIN);
     gpio_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
+}
 
+/*!
+    \brief      configure the I2CX interface
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void i2c_config(void) {
+    /* enable I2C clock */
+    rcu_periph_clock_enable(RCU_I2C);
+    /* configure I2C clock */
     i2c_clock_config(I2C0, I2C_SPEED, I2C_DTCY_2);
-
+    /* configure I2C address */
-    // i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, LDC1612_ADDR);
+    i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, LDC1612_ADDR);
+    /* enable I2CX */
     i2c_enable(I2C0);
+    /* enable acknowledge */
     i2c_ack_config(I2C0, I2C_ACK_ENABLE);
 }
 
-// void LDC1612_Init(void) {
+/*!
-//     uint8_t RCOUNT0_ALL[3]={SET_CONVERSION_TIME_REG_START,0x05,0x36};//csdn
+    \brief      reset I2C bus
-//     uint8_t SETTLECOUNT0_ALL[3]={SET_LC_STABILIZE_REG_START,0x00,0x0a};
+    \param[in]  none
-//     uint8_t CLOCK_DIVIDERS0_ALL[3]={SET_FREQ_REG_START,0x10,0x02};
+    \param[out] none
-//     uint8_t ERROR_CONFIG_ALL[3]={ERROR_CONFIG_REG,0x00,0x00};
+    \retval     none
-//     uint8_t MUX_CONFIG_ALL[3]={MUL_CONFIG_REG,0x82,0x0c};
+*/
-//     uint8_t DRIVE_CURRENT0_ALL[3]={SET_DRIVER_CURRENT_REG,0x90,0x00};
+void i2c_bus_reset(void) {
-//     uint8_t CONFIG_ALL[3]={SENSOR_CONFIG_REG,0x14,0x01};//csdn
+    i2c_deinit(I2C0);
-//
+    /* configure SDA/SCL for GPIO */
-// }
+    GPIO_BC(I2C_SCL_PORT) |= I2C_SCL_PIN;
+    GPIO_BC(I2C_SDA_PORT) |= I2C_SDA_PIN;
+    gpio_output_options_set(I2C_SCL_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, I2C_SCL_PIN);
+    gpio_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
+    __NOP();
+    __NOP();
+    __NOP();
+    __NOP();
+    __NOP();
+    GPIO_BOP(I2C_SCL_PORT) |= I2C_SCL_PIN;
+    __NOP();
+    __NOP();
+    __NOP();
+    __NOP();
+    __NOP();
+    GPIO_BOP(I2C_SDA_PORT) |= I2C_SDA_PIN;
+    /* connect I2C_SCL_PIN to I2C_SCL */
+    /* connect I2C_SDA_PIN to I2C_SDA */
+    gpio_output_options_set(I2C_SCL_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SCL_PIN);
+    gpio_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
+    /* configure the I2CX interface */
+    i2c_config();
+}
 
 /**
  * @brief 扫描I2C总线，查找连接的设备
@@ -44,7 +84,7 @@ void I2C_config(void) {
  * 如果在某个地址上发现了设备，则会打印出该设备的地址。
  * 最后会打印出找到的设备总数。
  */
-void I2C_scan(void) {
+void i2c_scan(void) {
     uint32_t timeout;
     uint8_t address;
     int found_devices = 0;
@@ -97,105 +137,512 @@ void I2C_scan(void) {
     }
 }
 
-int LDC1612_IIC_read_16bits(void) {
+/** @brief set conversion interval time.
+    @param channel LDC1612 has total two channels.
+    @param result The value to be set.
+ * */
+void ldc1612_set_conversion_time(uint8_t channel, uint16_t result) {
     uint8_t data[2] = {0};
-    uint16_t raw_temp = 0;
+    data[0] = (result >> 8) & 0xFF;
-    uint16_t timeout = 0;
+    data[1] = result & 0xFF;
+    ldc1612_iic_write_16bits(SET_CONVERSION_TIME_REG_START + channel, data);
+}
 
+/** @brief set conversion offset.
+    @param channel LDC1612 has total two channels.
+    @param result The value to be set.
+ * */
+void ldc1612_set_conversion_offset(uint8_t channel, uint16_t result) {
+    uint8_t data[2] = {0};
+    data[0] = (result >> 8) & 0xFF;
+    data[1] = result & 0xFF;
+    ldc1612_iic_write_16bits(SET_CONVERSION_OFFSET_REG_START + channel, data);
+}
+
+/** @brief Before conversion,wait LC sensor stabilize for a short time.
+    @param channel LDC1612 has total two channels.
+    @param result The value to be set.
+ * */
+void ldc1612_set_LC_stabilize_time(uint8_t channel, uint16_t result) {
+    uint8_t data[2] = {0};
+    data[0] = (result >> 8) & 0xFF;
+    data[1] = result & 0xFF;
+    ldc1612_iic_write_16bits(SET_LC_STABILIZE_REG_START + channel, data);
+}
+
+/** @brief set input frequency divide and fref divide.
+    @param channel LDC1612 has total two channels.
+    @param FIN_DIV FIN input divide
+    @param FREF_DIV fref,reference frequency of sensor.
+ * */
+void ldc1612_set_freq_divide(uint8_t channel) {
+    uint16_t value;
+    uint16_t fin_div, freq_div;
+    float sensor_freq;
+
+    sensor_freq = 1 / (2 * 3.14 * sqrt(COIL_L_UH * COIL_C_PF * pow(10, -18))) * pow(10, -6);
+
+    fin_div = (uint16_t) (sensor_freq / 8.75 + 1);
+
+    if (fin_div * 4 < 40) {
+        freq_div = 2;
+    } else {
+        freq_div = 4;
+    }
+
+    value = fin_div << 12;
+    value |= freq_div;
+    // printf("\tvalue: 0x%x\r\n", value);
+
+    uint8_t data[2] = {0};
+    data[0] = (value >> 8) & 0xFF;
+    data[1] = value & 0xFF;
+    // printf("\tFIN_DIV: %d, FREF_DIV: %d\r\n", fin_div, freq_div);
+
+    ldc1612_iic_write_16bits(SET_FREQ_REG_START + channel, data);
+}
+
+/** @brief Error output config.
+    @param result The value to be set.
+ * */
+void ldc1612_set_error_config(uint16_t value) {
+    uint8_t data[2] = {0};
+    data[0] = (value >> 8) & 0xFF;
+    data[1] = value & 0xFF;
+
+    ldc1612_iic_write_16bits(ERROR_CONFIG_REG, data);
+}
+
+/** @brief mux  config.
+    @param result The value to be set.
+ * */
+void ldc1612_set_mux_config(uint16_t value) {
+    uint8_t data[2] = {0};
+    data[0] = (value >> 8) & 0xFF;
+    data[1] = value & 0xFF;
+
+    ldc1612_iic_write_16bits(MUL_CONFIG_REG, data);
+}
+
+/** @brief reset sensor.
+
+ * */
+void ldc1612_reset_sensor(void) {
+    uint8_t data[2] = {0};
+    data[0] = 0x80;
+    data[1] = 0x00;
+    ldc1612_iic_write_16bits(SENSOR_RESET_REG, data);
+}
+
+/** @brief set drive current of sensor.
+    @param result The value to be set.
+ * */
+void ldc1612_set_drive_current(uint8_t channel, uint16_t value) {
+    uint8_t data[2] = {0};
+    data[0] = (value >> 8) & 0xFF;
+    data[1] = value & 0xFF;
+
+    ldc1612_iic_write_16bits(SET_DRIVER_CURRENT_REG + channel, data);
+}
+
+/** @brief Main config part of sensor.Contains select channel、start conversion、sleep mode、sensor activation mode、INT pin disable ..
+    @param result The value to be set.
+ * */
+void ldc1612_set_sensor_config(uint16_t value) {
+    uint8_t data[2] = {0};
+    data[0] = (value >> 8) & 0xFF;
+    data[1] = value & 0xFF;
+
+    ldc1612_iic_write_16bits(SENSOR_CONFIG_REG, data);
+}
+
+void ldc1612_single_ch0_config(void) {
+    ldc1612_set_freq_divide(CHANNEL_0); //0x14 --0x1002
+
+    ldc1612_set_LC_stabilize_time(CHANNEL_0, LC_STABILIZE_TIME_CH0); //0x10 --0x001E
+
+    ldc1612_set_conversion_time(CHANNEL_0, LDC1612_CONVERSION_TIME_CH0); //0x08 --0x0546
+
+    ldc1612_set_error_config(LDC1612_ERROR_CONFIG); //0x19 --0x0000)
+
+    ldc1612_set_drive_current(CHANNEL_0, LDC1612_DRIVE_CURRENT); //0x1E --0x9000
+
+    ldc1612_set_mux_config(LDC1612_MUX_CONFIG); //0x1B --0x020C
+
+    ldc1612_set_sensor_config(LDC1612_SENSOR_CONFIG); //0x1A --0x1601
+}
+
+void ldc1612_iic_get_sensor_infomation(void) {
+    uint8_t data[2] = {0};
+    ldc1612_iic_read_16bits(READ_MANUFACTURER_ID, data);
+    printf("\tManufacturer: 0x%x\r\n", (data[0] << 8) | data[1]);
+    ldc1612_iic_read_16bits(READ_DEVICE_ID, data);
+    printf("\tDevice: 0x%x\r\n", (data[0] << 8) | data[1]);
+}
+
+uint16_t ldc1612_get_manufacturer_id(void) {
+    uint8_t data[2] = {0};
+    ldc1612_iic_read_16bits(READ_MANUFACTURER_ID, data);
+    return (data[0] << 8) | data[1];
+}
+
+uint16_t ldc1612_get_deveice_id(void) {
+    uint8_t data[2] = {0};
+    ldc1612_iic_read_16bits(READ_DEVICE_ID, data);
+    return (data[0] << 8) | data[1];
+}
+
+/** @brief read the raw channel result from register.
+    @param channel LDC1612 has total two channels.
+    @param result raw data
+ * */
+uint32_t ldc1612_get_raw_channel_result(uint8_t channel) {
+    uint32_t raw_value = 0;
+    uint8_t value[2] = {0};
+
+    ldc1612_iic_read_16bits(CONVERTION_RESULT_REG_START + channel, value);
+    raw_value |= (uint32_t) ((value[0] << 8) | value[1]) << 16;
+    ldc1612_iic_read_16bits(CONVERTION_RESULT_REG_START + channel + 1, value);
+    raw_value |= (uint32_t) ((value[0] << 8) | value[1]);
+    return ldc1612_parse_raw_result(raw_value);
+}
+
+/** @brief parse the data which read from data register.
+    @param channel LDC1612 has total two channels.
+    @param raw_result the raw data which read from data register,it contains error codes and sensor value;
+ * */
+uint32_t ldc1612_parse_raw_result(uint32_t raw_result) {
+    uint32_t calibration_value = 0;
+    uint8_t error_code = 0;
+
+    calibration_value = raw_result & 0x0FFFFFFF;
+    if (0xFFFFFFF == calibration_value) {
+        return 0xF0000000;
+        // ERR_NC-No coil detected!!!
+    }
+
+    error_code = raw_result >> 24;
+
+    if (error_code & 0x80) {
+        return 0x80000000;
+        // ERR_UR-Under range error!!!
+    }
+    if (error_code & 0x40) {
+        return 0x40000000;
+        // ERR_OR-Over range error!!!
+    }
+    if (error_code & 0x20) {
+        return 0x20000000;
+        // ERR_WD-Watch dog timeout error!!!
+    }
+    if (error_code & 0x10) {
+        return 0x10000000;
+        // ERR_AE-error!!!
+    }
+
+    return raw_result;
+}
+
+
+uint8_t ldc1612_iic_read_16bits(uint8_t reg_addr, uint8_t *data) {
+    uint8_t state = I2C_START;
+    uint8_t read_cycle = 0;
+    uint16_t timeout = 0;
+    uint8_t i2c_timeout_flag = 0;
+    uint8_t number_of_byte = 2;
+
+    /* enable acknowledge */
     i2c_ack_config(I2C0, I2C_ACK_ENABLE);
 
-    while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT)) //判断IIC总线是否忙，发送起始信号
+    while (!(i2c_timeout_flag)) {
+        switch (state) {
+            case I2C_START:
+                if (RESET == read_cycle) {
+                    /* i2c master sends start signal only when the bus is idle */
+                    while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT)) {
                         timeout++;
+                    }
+                    if (timeout < I2C_TIME_OUT) {
+                        /* whether to send ACK or not for the next byte */
+                        i2c_ackpos_config(I2C0, I2C_ACKPOS_NEXT);
+                    } else {
+                        // i2c_bus_reset();
+                        timeout = 0;
+                        state = I2C_START;
+                        printf("i2c bus is busy in READ!\n");
+                    }
+                }
+            /* send the start signal */
+                delay_us(5);
+                i2c_start_on_bus(I2C0);
+                timeout = 0;
+                state = I2C_SEND_ADDRESS;
+                break;
+            case I2C_SEND_ADDRESS:
+                /* i2c master sends START signal successfully */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout < I2C_TIME_OUT) {
+                    if (RESET == read_cycle) {
+                        i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_TRANSMITTER);
+                        state = I2C_CLEAR_ADDRESS_FLAG;
+                    } else {
+                        i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_RECEIVER);
+                        i2c_ack_config(I2C0, I2C_ACK_DISABLE);
+                        state = I2C_CLEAR_ADDRESS_FLAG;
+                    }
+                    timeout = 0;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    read_cycle = RESET;
+                    printf("i2c master sends start signal timeout in READ!\n");
+                }
+                break;
+            case I2C_CLEAR_ADDRESS_FLAG:
+                /* address flag set means i2c slave sends ACK */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout < I2C_TIME_OUT) {
+                    i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
+                    if ((SET == read_cycle) && (1 == number_of_byte)) {
+                        /* send a stop condition to I2C bus */
+                        i2c_stop_on_bus(I2C0);
+                    }
+                    timeout = 0;
+                    state = I2C_TRANSMIT_DATA;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    read_cycle = RESET;
+                    printf("i2c master clears address flag timeout in READ!\n");
+                }
+                break;
+            case I2C_TRANSMIT_DATA:
+                if (RESET == read_cycle) {
+                    /* wait until the transmit data buffer is empty */
+                    while ((!i2c_flag_get(I2C0, I2C_FLAG_TBE)) && (timeout < I2C_TIME_OUT)) {
+                        timeout++;
+                    }
+                    if (timeout < I2C_TIME_OUT) {
+                        /* send the EEPROM's internal address to write to : only one byte address */
+                        i2c_data_transmit(I2C0, reg_addr);
+                        timeout = 0;
+                    } else {
+                        timeout = 0;
+                        state = I2C_START;
+                        read_cycle = RESET;
+                        printf("i2c master wait data buffer is empty timeout in READ!\n");
+                    }
+                    /* wait until BTC bit is set */
+                    while ((!i2c_flag_get(I2C0, I2C_FLAG_BTC)) && (timeout < I2C_TIME_OUT)) {
+                        timeout++;
+                    }
+                    if (timeout < I2C_TIME_OUT) {
+                        timeout = 0;
+                        state = I2C_START;
+                        read_cycle = SET;
+                    } else {
+                        timeout = 0;
+                        state = I2C_START;
+                        read_cycle = RESET;
+                        printf("i2c master sends register address timeout in READ!\n");
+                    }
+                } else {
+                    while (number_of_byte) {
+                        timeout++;
+                        if (2 == number_of_byte) {
+                            /* wait until BTC bit is set */
+                            while (!i2c_flag_get(I2C0, I2C_FLAG_BTC));
+                            /* send a stop condition to I2C bus */
+                            i2c_stop_on_bus(I2C0);
+                        }
+                        /* wait until RBNE bit is set */
+                        if (i2c_flag_get(I2C0, I2C_FLAG_RBNE)) {
+                            /* read a byte from the EEPROM */
+                            *data = i2c_data_receive(I2C0);
+                            /* point to the next location where the byte read will be saved */
+                            data++;
+                            /* decrement the read bytes counter */
+                            number_of_byte--;
+                            timeout = 0;
+                        }
+                        if (timeout > I2C_TIME_OUT) {
+                            timeout = 0;
+                            state = I2C_START;
+                            read_cycle = 0;
+                            printf("i2c master sends data timeout in READ!\n");
+                        }
+                    }
+                    timeout = 0;
+                    state = I2C_STOP;
+                }
+                break;
+            case I2C_STOP:
+                /* i2c master sends STOP signal successfully */
+                while ((I2C_CTL0(I2C0) & I2C_CTL0_STOP) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout < I2C_TIME_OUT) {
+                    timeout = 0;
+                    state = I2C_END;
+                    i2c_timeout_flag = I2C_OK;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    read_cycle = 0;
+                    printf("i2c master sends stop signal timeout in READ!\n");
+                }
+                break;
+            default:
+                state = I2C_START;
+                read_cycle = 0;
+                i2c_timeout_flag = I2C_OK;
+                timeout = 0;
+                printf("i2c master sends start signal in READ.\n");
+                break;
+        }
+    }
+    return I2C_END;
+}
+
+uint8_t ldc1612_iic_write_16bits(uint8_t reg_addr, uint8_t data[2]) {
+    uint8_t state = I2C_START;
+    uint16_t timeout = 0;
+    uint8_t i2c_timeout_flag = 0;
+
+    /* enable acknowledge */
+    i2c_ack_config(I2C0, I2C_ACK_ENABLE);
+    while (!(i2c_timeout_flag)) {
+        switch (state) {
+            case I2C_START:
+                /* i2c master sends start signal only when the bus is idle */
+                while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
                 if (timeout < I2C_TIME_OUT) {
                     i2c_start_on_bus(I2C0);
                     timeout = 0;
+                    state = I2C_SEND_ADDRESS;
                 } else {
-        printf("err\r\n");
+                    timeout = 0;
-        return -1; // 超时返回错误
+                    state = I2C_START;
+                    printf("i2c bus is busy in WRITE BYTE!\n");
                 }
-
+                break;
-    while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND) && (timeout < I2C_TIME_OUT)) //判断起始位是否发送，设置sensor地址并设置为写
+            case I2C_SEND_ADDRESS:
+                /* i2c master sends START signal successfully */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)) && (timeout < I2C_TIME_OUT)) {
                     timeout++;
+                }
                 if (timeout < I2C_TIME_OUT) {
                     i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_TRANSMITTER);
                     timeout = 0;
+                    state = I2C_CLEAR_ADDRESS_FLAG;
                 } else {
-        return -2; // 超时返回错误
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master sends start signal timeout in WRITE BYTE!\n");
                 }
-
+                break;
-    while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
+            case I2C_CLEAR_ADDRESS_FLAG:
+                /* address flag set means i2c slave sends ACK */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)) && (timeout < I2C_TIME_OUT)) {
                     timeout++;
+                }
                 if (timeout < I2C_TIME_OUT) {
                     i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
                     timeout = 0;
+                    state = I2C_TRANSMIT_DATA;
                 } else {
-        return -3; // 超时返回错误
-    }
-
-    while (!i2c_flag_get(I2C0, I2C_FLAG_TBE) && (timeout < I2C_TIME_OUT)) //判断地址是否发送完成，然后发送寄存器地址
-        timeout++;
-    if (timeout < I2C_TIME_OUT) {
-        i2c_data_transmit(I2C0, READ_DEVICE_ID);
                     timeout = 0;
-        // i2c_start_on_bus(I2C0);
+                    state = I2C_START;
-    } else {
+                    printf("i2c master clears address flag timeout in WRITE BYTE!\n");
-        return -4; // 超时返回错误
                 }
-
+                break;
-    while (i2c_flag_get(I2C0, I2C_FLAG_BTC) && (timeout < I2C_TIME_OUT)) //判断发送缓冲器是否为空，为空后（发送完毕）重新发送开始信号
+            case I2C_TRANSMIT_DATA:
-        timeout++;
+                /* wait until the transmit data buffer is empty */
-    if (timeout < I2C_TIME_OUT) {
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_TBE)) && (timeout < I2C_TIME_OUT)) {
-        i2c_start_on_bus(I2C0);
-        timeout = 0;
-    } else {
-        return -5; // 超时返回错误
-    }
-
-    while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND) && (timeout < I2C_TIME_OUT)) {
                     timeout++;
                 }
                 if (timeout < I2C_TIME_OUT) {
-        i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_RECEIVER);
+                    /* send IIC register address */
+                    i2c_data_transmit(I2C0, reg_addr);
                     timeout = 0;
                 } else {
-        return -6; // 超时返回错误
-    }
-
-    while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
-        timeout++;
-    if (timeout < I2C_TIME_OUT) {
-        i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
                     timeout = 0;
-    } else {
+                    state = I2C_START;
-        return -7; // 超时返回错误
+                    printf("i2c master sends data timeout in WRITE BYTE!\n");
                 }
 
-    // 读取第一个字节的数据
+            /* wait until BTC bit is set */
-    while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE) && (timeout < I2C_TIME_OUT)) {
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_BTC)) && (timeout < I2C_TIME_OUT)) {
                     timeout++;
                 }
                 if (timeout < I2C_TIME_OUT) {
-        data[0] = i2c_data_receive(I2C0);
+                    /* send register MSB value */
+                    i2c_data_transmit(I2C0, data[0]);
                     timeout = 0;
                 } else {
-        return -8; // 超时返回错误
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master sends MSB data timeout in WRITE BYTE!\n");
                 }
 
-    // i2c_ack_config(I2C0, I2C_ACK_DISABLE); // 关闭发送ACK，它会在下一个字节完成后发送NAK
+            /* wait until BTC bit is set */
-
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_BTC)) && (timeout < I2C_TIME_OUT)) {
-    // 读取第二个字节的数据
-    while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE) && (timeout < I2C_TIME_OUT)) {
                     timeout++;
                 }
                 if (timeout < I2C_TIME_OUT) {
-        data[1] = i2c_data_receive(I2C0);
+                    /* send register LSB value */
+                    i2c_data_transmit(I2C0, data[1]);
                     timeout = 0;
+                    state = I2C_STOP;
                 } else {
-        return -9; // 超时返回错误
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master sends LSB data timeout in WRITE BYTE!\n");
                 }
 
+            /* wait until BTC bit is set */
+                while ((!i2c_flag_get(I2C0, I2C_FLAG_BTC)) && (timeout < I2C_TIME_OUT)) {
+                    timeout++;
+                }
+                if (timeout < I2C_TIME_OUT) {
+                    state = I2C_STOP;
+                    timeout = 0;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master sends data timeout in WRITE BYTE!\n");
+                }
+                break;
+            case I2C_STOP:
+                /* send a stop condition to I2C bus */
                 i2c_stop_on_bus(I2C0);
-
+            /* i2c master sends STOP signal successfully */
-    printf("device id = %x\r\n", (data[0] <<8 | data[1]));
+                while ((I2C_CTL0(I2C0) & I2C_CTL0_STOP) && (timeout < I2C_TIME_OUT)) {
-    return 0;
+                    timeout++;
+                }
+                if (timeout < I2C_TIME_OUT) {
+                    timeout = 0;
+                    state = I2C_END;
+                    i2c_timeout_flag = I2C_OK;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master sends stop signal timeout in WRITE BYTE!\n");
+                }
+                break;
+            default:
+                state = I2C_START;
+                i2c_timeout_flag = I2C_OK;
+                timeout = 0;
+                printf("i2c master sends start signal in WRITE BYTE.\n");
+                break;
+        }
+    }
+    return I2C_END;
 }

src/main.c

@@ -12,8 +12,7 @@
 #include "RS485.h"
 #include "LDC1612.h"
 
-void led_config(void)
+void led_config(void) {
-{
     rcu_periph_clock_enable(LED_RCU);
 
     gpio_mode_set(LED_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_PIN);
@@ -40,125 +39,37 @@ void led_config(void)
     nvic_irq_enable(LED_IRQ, 2);
 }
 
-void iicSendData(void)
-{
-    while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
-    i2c_start_on_bus(I2C0);
-    printf("1\r\n");
-    while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND));
-    i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_TRANSMITTER);
-    printf("2\r\n");
-    while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND));
-    i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
-    printf("3\r\n");
-    while (!i2c_flag_get(I2C0, I2C_FLAG_TBE));
-    i2c_data_transmit(I2C0, 0x7E);
-    printf("4\r\n");
-    i2c_start_on_bus(I2C0);
-}
-
-void iicReceiveData(void)
-{
-    uint16_t data[3] = {0};
-    i2c_start_on_bus(I2C0);
-    // i2c_stop_on_bus(I2C0);
-    printf("5\r\n");
-    while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND));
-    i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_RECEIVER);
-    printf("6\r\n");
-    while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND));
-    i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
-    printf("7\r\n");
-    i2c_ack_config(I2C0, I2C_ACK_DISABLE);
-    while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE));
-    data[0] = i2c_data_receive(I2C0);
-    while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE));
-    data[1] = i2c_data_receive(I2C0);
-    while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE));
-    data[2] = i2c_data_receive(I2C0);
-
-    i2c_stop_on_bus(I2C0);
-    i2c_ack_config(I2C0, I2C_ACK_ENABLE);
-
-    printf("data[0] = %x\r\n", data[0]);
-    printf("data[1] = %x\r\n", data[1]);
-    printf("data[2] = %x\r\n", data[2]);
-}
-
 /*!
     \brief      main function
     \param[in]  none
     \param[out] none
     \retval     none
 */
-int main(void)
+int main(void) {
-{
     /* configure systick */
     systick_config();
     RS485_config();
     led_config();
-    I2C_config();
+    i2c_gpio_config();
+    i2c_config();
 
-    // delay_ms(5000);
+    uint32_t raw_value = 0;
-    printf("\r\n");
-    printf("XLSW-3DP-LDC1612! V0.0.1\r\n");
-    printf("\r\n");
 
-    // uint16_t data[3] = {0};
+    delay_ms(500);
+    ldc1612_iic_get_sensor_infomation();
 
-    // I2C_scan();
+    ldc1612_single_ch0_config();
-
-    delay_ms(1000);
-
-    // while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY));
-    // i2c_start_on_bus(I2C0);
-    // printf("1\r\n");
-    // while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND));
-    // i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_TRANSMITTER);
-    // printf("2\r\n");
-    // while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND));
-    // i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
-    // printf("3\r\n");
-    // while (!i2c_flag_get(I2C0, I2C_FLAG_TBE));
-    // i2c_data_transmit(I2C0, 0x7E);
-    // printf("4\r\n");
-    // i2c_start_on_bus(I2C0);
-    // // i2c_stop_on_bus(I2C0);
-
-
-    // delay_ms(100);
-    // i2c_start_on_bus(I2C0);
-    // delay_ms(100);
-    // i2c_stop_on_bus(I2C0);
-
-
-    // i2c_stop_on_bus(I2C0);
-    // i2c_ack_config(I2C0, I2C_ACK_ENABLE);
-
-    // iicSendData();
-    // iicReceiveData();
-
-    int result = 0;
-    result = LDC1612_IIC_read_16bits();
-    printf("result = %d\r\n", result);
 
     while (1) {
-
+        delay_ms(500);
-
+        raw_value = ldc1612_get_raw_channel_result(CHANNEL_0);
-        delay_ms(1000);
+        printf("data:%ld\r\n",raw_value);
-        printf("OK!!!\r\n");
-        // iicSendData();
-
-        // i2c_flag_clear(I2C0, I2C_FLAG_I2CBSY);
-
     }
 }
 
 /* retarget the C library printf function to the USART */
-int _write (int fd, char *pBuffer, int size)
+int _write(int fd, char *pBuffer, int size) {
-{
+    for (int i = 0; i < size; i++) {
-    for (int i = 0; i < size; i++)
-    {
         usart_data_transmit(USART0, (uint8_t) pBuffer[i]);
         while (RESET == usart_flag_get(USART0, USART_FLAG_TBE));
     }