change iic speed to 20K

inc/LDC1612.h

@@ -30,11 +30,27 @@
 #define SENSOR_RESET_REG                        0X1C
 #define SET_DRIVER_CURRENT_REG                  0X1E
 
+#define RCOUNT_CH0_REG                          0x08
+#define SETTLECOUNT_CH0_REG                     0x10
+#define CLOCK_DIVIDERS_CH0_REG                  0x14
+#define ERROR_CONFIG_REG                        0X19
+#define MUX_CONFIG_REG                          0x1B
+#define DRIVE_CURRENT_CH0_REG                   0x1E
+#define SENSOR_CONFIG_REG                       0X1A
+
 #define READ_MANUFACTURER_ID                    0X7E
 #define READ_DEVICE_ID                          0X7F
 
 /******************************************************************************/
 
+#define CHANNEL_0  0
+#define CHANNEL_1  1
+
+/******************************************************************************/
+
+#define CONVERSION_TIME_CH0                     0X0546  //0536
+#define CONVERSION_OFFSET_CH0                   0X0000
+#define LC_STABILIZE_TIME_CH0                   0X001E //30
 
 typedef enum {
     I2C_START = 0,
@@ -44,8 +60,13 @@ typedef enum {
     I2C_STOP
 } i2c_process_enum;
 
-#define I2C_SPEED 100000
-#define RCU_IR_GPIO RCU_GPIOF
+#define I2C_TIME_OUT    (uint16_t)(10000)
+#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 +74,19 @@ 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_config(void);
+void gpio_config(void);
+void i2c_config(void);
+void i2c_bus_reset(void);
 void I2C_scan(void);
 
 int LDC1612_IIC_read_16bits(uint8_t reg, uint16_t *data);
 void ldc1612_iic_get_sensor_infomation(void);
+uint16_t ldc1612_get_manufacturer_id(void);
 uint16_t ldc1612_get_deveice_id(void);
+uint8_t ldc1612_iic_read_16bits(uint8_t reg_addr, uint8_t *data);
+int ldc1612_iic_write_16bits(uint8_t reg_addr, uint8_t data[2]);
 
 #endif //LDC1612_H

src/LDC1612.c

@@ -5,7 +5,7 @@
 #include "LDC1612.h"
 
 void I2C_config(void) {
-    rcu_periph_clock_enable(RCU_IR_GPIO);
+    rcu_periph_clock_enable(RCU_GPIO_I2C);
     rcu_periph_clock_enable(RCU_I2C);
 
     gpio_af_set(I2C_SCL_PORT, I2C_GPIO_AF, I2C_SCL_PIN);
@@ -24,6 +24,79 @@ void I2C_config(void) {
     i2c_ack_config(I2C0, I2C_ACK_ENABLE);
 }
 
+/*!
+    \brief      configure the GPIO ports
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void gpio_config(void) {
+    /* enable IIC GPIO clock */
+    rcu_periph_clock_enable(RCU_GPIO_I2C);
+
+    /* connect I2C_SCL_PIN to I2C_SCL */
+    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);
+    /* enable I2CX */
+    i2c_enable(I2C0);
+    /* enable acknowledge */
+    i2c_ack_config(I2C0, I2C_ACK_ENABLE);
+}
+
+/*!
+    \brief      reset I2C bus
+    \param[in]  none
+    \param[out] none
+    \retval     none
+*/
+void i2c_bus_reset(void) {
+    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
  *
@@ -84,6 +157,39 @@ void I2C_scan(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};
+    data[0] = (result >> 8) & 0xFF;
+    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);
+}
+
 int LDC1612_IIC_read_16bits(uint8_t reg, uint16_t *data) {
     uint16_t timeout = 0;
 
@@ -189,16 +295,326 @@ int LDC1612_IIC_read_16bits(uint8_t reg, uint16_t *data) {
 
 void ldc1612_iic_get_sensor_infomation(void) {
     uint16_t data = 0;
-    LDC1612_IIC_read_16bits(READ_DEVICE_ID, &data);
+    LDC1612_IIC_read_16bits(READ_MANUFACTURER_ID, &data);
     printf("\tManufacturer: 0x%x\r\n", data);
-    // delay_ms(5000);
     LDC1612_IIC_read_16bits(READ_DEVICE_ID, &data);
     printf("\tDevice: 0x%x\r\n", data);
 }
 
-uint16_t ldc1612_get_deveice_id(void) {
-    uint16_t data = 0;
-    LDC1612_IIC_read_16bits(READ_DEVICE_ID, &data);
-    return data;
+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) {
+    // uint16_t data = 0;
+    // LDC1612_IIC_read_16bits(READ_DEVICE_ID, &data);
+    // return data;
+    uint8_t data[2] = {0};
+    ldc1612_iic_read_16bits(READ_DEVICE_ID, data);
+    return (data[0] << 8) | data[1];
+}
+
+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_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;
+}
+
+int 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 {
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c bus is busy in WRITE BYTE!\n");
+                }
+                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) {
+                    i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_TRANSMITTER);
+                    timeout = 0;
+                    state = I2C_CLEAR_ADDRESS_FLAG;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master sends start signal timeout in WRITE BYTE!\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);
+                    timeout = 0;
+                    state = I2C_TRANSMIT_DATA;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master clears address flag timeout in WRITE BYTE!\n");
+                }
+                break;
+            case I2C_TRANSMIT_DATA:
+                /* 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 IIC register address */
+                    i2c_data_transmit(I2C0, reg_addr);
+                    timeout = 0;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master sends 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) {
+                    /* send register MSB value */
+                    i2c_data_transmit(I2C0, data[0]);
+                    timeout = 0;
+                } else {
+                    timeout = 0;
+                    state = I2C_START;
+                    printf("i2c master sends MSB 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) {
+                    /* send register LSB value */
+                    i2c_data_transmit(I2C0, data[1]);
+                    timeout = 0;
+                    state = I2C_STOP;
+                } else {
+                    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 */
+                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;
+                    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

@@ -60,11 +60,23 @@ int main(void) {
     printf("\r\n");
 
     delay_ms(500);
+    ldc1612_iic_get_sensor_infomation();
 
-    uint16_t device_id = 0;
-    device_id = ldc1612_get_deveice_id();
-    printf("device id = 0x%x\r\n", device_id);
+    // uint16_t device_id = 0;
+    // device_id = ldc1612_get_deveice_id();
+    // printf("device id = 0x%x\r\n", device_id);
+    //
+    // delay_ms(100);
+    //
+    // device_id = 0;
+    // device_id = ldc1612_get_manufacturer_id();
+    // printf("device id = 0x%x\r\n", device_id);
 
+    uint16_t result = {0x0546};
+    uint8_t data[2] = {0};
+    data[0] = (result >> 8) & 0xFF;
+    data[1] = result & 0xFF;
+    printf("data[0] = 0x%x, data[1] = 0x%x\r\n", data[0], data[1]);
 
     while (1) {
         // delay_ms(1000);