109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
//
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// Created by dell on 24-9-26.
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//
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#include "mlx90614.h"
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#include "gd32e23x.h"
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#include "systick.h"
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#include <stdio.h>
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void i2c_config(void)
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{
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rcu_periph_clock_enable(RCU_IR_GPIO);
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rcu_periph_clock_enable(RCU_I2C);
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gpio_af_set(I2C_SCL_PORT, I2C_GPIO_AF, I2C_SCL_PIN);
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gpio_af_set(I2C_SDA_PORT, I2C_GPIO_AF, I2C_SDA_PIN);
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gpio_mode_set(I2C_SCL_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, I2C_SCL_PIN);
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gpio_output_options_set(I2C_SCL_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SCL_PIN);
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gpio_mode_set(I2C_SDA_PORT, GPIO_MODE_AF, GPIO_PUPD_PULLUP, I2C_SDA_PIN);
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gpio_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
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i2c_clock_config(IR_I2C, I2C_SPEED, I2C_DTCY_2);
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i2c_mode_addr_config(IR_I2C, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, SLAVE_ADDR);
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i2c_enable(IR_I2C);
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i2c_ack_config(IR_I2C, I2C_ACK_ENABLE);
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}
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uint32_t read_ir_mlx90614(void)
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{
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uint8_t Data[3] = {0};
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uint32_t inttemp_ir = 0;
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uint16_t timeout = 0;
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// 发送起始信号
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i2c_start_on_bus(IR_I2C);
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while(i2c_flag_get(IR_I2C, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT)) {
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timeout++;
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}
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if (timeout >= I2C_TIME_OUT) {
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return -41001; // 超时返回错误
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}
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// 发送从机地址和写操作位
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i2c_master_addressing(IR_I2C, SLAVE_ADDR, I2C_TRANSMITTER);
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while(!i2c_flag_get(IR_I2C, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT)) {
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timeout++;
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}
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if (timeout >= I2C_TIME_OUT) {
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return -41002; // 超时返回错误
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}
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i2c_flag_clear(IR_I2C, I2C_FLAG_ADDSEND);
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// 发送寄存器地址
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i2c_data_transmit(IR_I2C, REG_ADDR_OBJ_TEMP);
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while(!i2c_flag_get(IR_I2C, I2C_FLAG_TBE) && (timeout < I2C_TIME_OUT)) {
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timeout++;
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}
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if (timeout >= I2C_TIME_OUT) {
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return -41003; // 超时返回错误
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}
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// 重复起始信号
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i2c_start_on_bus(IR_I2C);
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while(i2c_flag_get(IR_I2C, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT)) {
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timeout++;
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}
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if (timeout >= I2C_TIME_OUT) {
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return -41004; // 超时返回错误
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}
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// 发送从机地址和读操作位
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i2c_master_addressing(IR_I2C, SLAVE_ADDR, I2C_RECEIVER);
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while(!i2c_flag_get(IR_I2C, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT)) {
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timeout++;
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}
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if (timeout >= I2C_TIME_OUT) {
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return -41005; // 超时返回错误
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}
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i2c_flag_clear(IR_I2C, I2C_FLAG_ADDSEND);
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// 读取数据
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for (int i = 0; i < 3; i++) {
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while(!i2c_flag_get(IR_I2C, I2C_FLAG_RBNE) && (timeout < I2C_TIME_OUT)) {
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timeout++;
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}
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if (timeout >= I2C_TIME_OUT) {
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return -41006; // 超时返回错误
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}
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Data[i] = i2c_data_receive(IR_I2C);
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if (i < 2) {
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i2c_ack_config(IR_I2C, I2C_ACK_ENABLE);
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} else {
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i2c_ack_config(IR_I2C, I2C_ACK_DISABLE);
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}
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timeout = 0;
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}
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// 发送停止信号
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i2c_stop_on_bus(IR_I2C);
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// 计算温度
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inttemp_ir = ((uint16_t)(Data[1] << 8) | Data[0]) * 2 -27315;
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return inttemp_ir; // 返回温度值
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}
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