generated from hulk/gd32e23x_template
621 lines
22 KiB
C
621 lines
22 KiB
C
//
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// Created by dell on 24-12-3.
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//
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#include "LDC1612.h"
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void I2C_config(void) {
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rcu_periph_clock_enable(RCU_GPIO_I2C);
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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(I2C0, I2C_SPEED, I2C_DTCY_2);
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// i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, LDC1612_ADDR);
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i2c_enable(I2C0);
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i2c_ack_config(I2C0, I2C_ACK_ENABLE);
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}
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/*!
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\brief configure the GPIO ports
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\param[in] none
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\param[out] none
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\retval none
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*/
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void gpio_config(void) {
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/* enable IIC GPIO clock */
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rcu_periph_clock_enable(RCU_GPIO_I2C);
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/* connect I2C_SCL_PIN to I2C_SCL */
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gpio_af_set(I2C_SCL_PORT, I2C_GPIO_AF, I2C_SCL_PIN);
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/* connect I2C_SDA_PIN to I2C_SDA */
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gpio_af_set(I2C_SDA_PORT, I2C_GPIO_AF, I2C_SDA_PIN);
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/* configure GPIO pins of I2C */
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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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}
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/*!
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\brief configure the I2CX interface
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\param[in] none
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\param[out] none
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\retval none
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*/
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void i2c_config(void) {
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/* enable I2C clock */
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rcu_periph_clock_enable(RCU_I2C);
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/* configure I2C clock */
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i2c_clock_config(I2C0, I2C_SPEED, I2C_DTCY_2);
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/* configure I2C address */
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i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, LDC1612_ADDR);
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/* enable I2CX */
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i2c_enable(I2C0);
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/* enable acknowledge */
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i2c_ack_config(I2C0, I2C_ACK_ENABLE);
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}
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/*!
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\brief reset I2C bus
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\param[in] none
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\param[out] none
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\retval none
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*/
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void i2c_bus_reset(void) {
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i2c_deinit(I2C0);
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/* configure SDA/SCL for GPIO */
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GPIO_BC(I2C_SCL_PORT) |= I2C_SCL_PIN;
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GPIO_BC(I2C_SDA_PORT) |= I2C_SDA_PIN;
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gpio_output_options_set(I2C_SCL_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, I2C_SCL_PIN);
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gpio_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
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__NOP();
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__NOP();
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__NOP();
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__NOP();
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__NOP();
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GPIO_BOP(I2C_SCL_PORT) |= I2C_SCL_PIN;
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__NOP();
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__NOP();
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__NOP();
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__NOP();
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__NOP();
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GPIO_BOP(I2C_SDA_PORT) |= I2C_SDA_PIN;
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/* connect I2C_SCL_PIN to I2C_SCL */
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/* connect I2C_SDA_PIN to I2C_SDA */
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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_output_options_set(I2C_SDA_PORT, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, I2C_SDA_PIN);
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/* configure the I2CX interface */
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i2c_config();
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}
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/**
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* @brief 扫描I2C总线，查找连接的设备
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*
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* 该函数会扫描I2C总线上的所有地址（1到126），并尝试与每个地址进行通信。
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* 如果在某个地址上发现了设备，则会打印出该设备的地址。
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* 最后会打印出找到的设备总数。
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*/
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void I2C_scan(void) {
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uint32_t timeout;
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uint8_t address;
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int found_devices = 0;
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printf("Scanning I2C bus...\r\n");
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for (address = 1; address < 127; address++) {
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timeout = 0;
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// 生成起始条件
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while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT))
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timeout++;
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if (timeout >= I2C_TIME_OUT) {
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continue; // 超时，跳过该地址
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}
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i2c_start_on_bus(I2C0);
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timeout = 0;
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// 等待起始条件发送完成
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while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND) && (timeout < I2C_TIME_OUT))
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timeout++;
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if (timeout >= I2C_TIME_OUT) {
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continue; // 超时，跳过该地址
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}
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i2c_master_addressing(I2C0, (address << 1), I2C_TRANSMITTER);
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timeout = 0;
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// 等待地址发送完成
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while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
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timeout++;
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if (timeout < I2C_TIME_OUT) {
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i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
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printf("Found device at 0x%02X\r\n", address);
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found_devices++;
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}
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// 生成停止条件
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i2c_stop_on_bus(I2C0);
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timeout = 0;
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while (i2c_flag_get(I2C0, I2C_FLAG_STPDET) && (timeout < I2C_TIME_OUT))
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timeout++;
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}
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if (found_devices == 0) {
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printf("No I2C devices found.\r\n");
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} else {
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printf("Total %d I2C devices found.\r\n", found_devices);
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}
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}
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/** @brief set conversion interval time.
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@param channel LDC1612 has total two channels.
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@param result The value to be set.
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* */
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void ldc1612_set_conversion_time(uint8_t channel, uint16_t result) {
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uint8_t data[2] = {0};
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data[0] = (result >> 8) & 0xFF;
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data[1] = result & 0xFF;
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ldc1612_iic_write_16bits(SET_CONVERSION_TIME_REG_START + channel, data);
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}
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/** @brief set conversion offset.
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@param channel LDC1612 has total two channels.
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@param result The value to be set.
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* */
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void ldc1612_set_conversion_offset(uint8_t channel, uint16_t result) {
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uint8_t data[2] = {0};
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data[0] = (result >> 8) & 0xFF;
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data[1] = result & 0xFF;
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ldc1612_iic_write_16bits(SET_CONVERSION_OFFSET_REG_START + channel, data);
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}
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/** @brief Before conversion,wait LC sensor stabilize for a short time.
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@param channel LDC1612 has total two channels.
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@param result The value to be set.
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* */
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void ldc1612_set_LC_stabilize_time(uint8_t channel, uint16_t result) {
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uint8_t data[2] = {0};
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data[0] = (result >> 8) & 0xFF;
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data[1] = result & 0xFF;
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ldc1612_iic_write_16bits(SET_LC_STABILIZE_REG_START + channel, data);
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}
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int LDC1612_IIC_read_16bits(uint8_t reg, uint16_t *data) {
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uint16_t timeout = 0;
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i2c_ack_config(I2C0, I2C_ACK_ENABLE);
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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
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timeout++;
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if (timeout < I2C_TIME_OUT) {
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i2c_start_on_bus(I2C0);
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timeout = 0;
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} else {
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printf("err\r\n");
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return -1; // 超时返回错误
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}
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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
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timeout++;
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if (timeout < I2C_TIME_OUT) {
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i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_TRANSMITTER);
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timeout = 0;
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} else {
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return -2; // 超时返回错误
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}
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while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
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timeout++;
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if (timeout < I2C_TIME_OUT) {
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i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
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timeout = 0;
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} else {
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return -3; // 超时返回错误
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}
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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
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timeout++;
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if (timeout < I2C_TIME_OUT) {
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i2c_data_transmit(I2C0, reg);
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timeout = 0;
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// i2c_start_on_bus(I2C0);
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} else {
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return -4; // 超时返回错误
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}
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delay_us(10);
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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
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timeout++;
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if (timeout < I2C_TIME_OUT) {
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i2c_start_on_bus(I2C0);
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timeout = 0;
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} else {
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return -5; // 超时返回错误
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}
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while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND) && (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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i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_RECEIVER);
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timeout = 0;
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} else {
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return -6; // 超时返回错误
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}
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while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
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timeout++;
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if (timeout < I2C_TIME_OUT) {
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i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
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timeout = 0;
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} else {
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return -7; // 超时返回错误
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}
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// 读取第一个字节的数据
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while (!i2c_flag_get(I2C0, 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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*data = i2c_data_receive(I2C0) << 8;
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timeout = 0;
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} else {
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return -8; // 超时返回错误
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}
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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
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// 读取第二个字节的数据
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while (!i2c_flag_get(I2C0, 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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*data |= i2c_data_receive(I2C0);
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timeout = 0;
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} else {
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return -9; // 超时返回错误
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}
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i2c_stop_on_bus(I2C0);
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// printf("device id = %x\r\n", (data[0] <<8 | data[1]));
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return 0;
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}
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void ldc1612_iic_get_sensor_infomation(void) {
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uint16_t data = 0;
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LDC1612_IIC_read_16bits(READ_MANUFACTURER_ID, &data);
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printf("\tManufacturer: 0x%x\r\n", data);
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LDC1612_IIC_read_16bits(READ_DEVICE_ID, &data);
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printf("\tDevice: 0x%x\r\n", data);
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}
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uint16_t ldc1612_get_manufacturer_id(void) {
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uint8_t data[2] = {0};
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ldc1612_iic_read_16bits(READ_MANUFACTURER_ID, data);
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return (data[0] << 8) | data[1];
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}
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uint16_t ldc1612_get_deveice_id(void) {
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// uint16_t data = 0;
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// LDC1612_IIC_read_16bits(READ_DEVICE_ID, &data);
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// return data;
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uint8_t data[2] = {0};
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ldc1612_iic_read_16bits(READ_DEVICE_ID, data);
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return (data[0] << 8) | data[1];
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}
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uint8_t ldc1612_iic_read_16bits(uint8_t reg_addr, uint8_t *data) {
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uint8_t state = I2C_START;
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uint8_t read_cycle = 0;
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uint16_t timeout = 0;
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uint8_t i2c_timeout_flag = 0;
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uint8_t number_of_byte = 2;
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/* enable acknowledge */
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i2c_ack_config(I2C0, I2C_ACK_ENABLE);
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while (!(i2c_timeout_flag)) {
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switch (state) {
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case I2C_START:
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if (RESET == read_cycle) {
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/* i2c master sends start signal only when the bus is idle */
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while (i2c_flag_get(I2C0, 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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/* whether to send ACK or not for the next byte */
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i2c_ackpos_config(I2C0, I2C_ACKPOS_NEXT);
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} else {
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// i2c_bus_reset();
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timeout = 0;
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state = I2C_START;
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printf("i2c bus is busy in READ!\n");
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}
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}
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/* send the start signal */
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delay_us(5);
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i2c_start_on_bus(I2C0);
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timeout = 0;
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state = I2C_SEND_ADDRESS;
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break;
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case I2C_SEND_ADDRESS:
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/* i2c master sends START signal successfully */
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while ((!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)) && (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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if (RESET == read_cycle) {
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i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_TRANSMITTER);
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state = I2C_CLEAR_ADDRESS_FLAG;
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} else {
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i2c_master_addressing(I2C0, LDC1612_ADDR, I2C_RECEIVER);
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i2c_ack_config(I2C0, I2C_ACK_DISABLE);
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state = I2C_CLEAR_ADDRESS_FLAG;
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}
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timeout = 0;
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} else {
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timeout = 0;
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state = I2C_START;
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read_cycle = RESET;
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printf("i2c master sends start signal timeout in READ!\n");
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}
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break;
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case I2C_CLEAR_ADDRESS_FLAG:
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/* address flag set means i2c slave sends ACK */
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while ((!i2c_flag_get(I2C0, 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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i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
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if ((SET == read_cycle) && (1 == number_of_byte)) {
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/* send a stop condition to I2C bus */
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i2c_stop_on_bus(I2C0);
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}
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timeout = 0;
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state = I2C_TRANSMIT_DATA;
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} else {
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timeout = 0;
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state = I2C_START;
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read_cycle = RESET;
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printf("i2c master clears address flag timeout in READ!\n");
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}
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break;
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case I2C_TRANSMIT_DATA:
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if (RESET == read_cycle) {
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/* wait until the transmit data buffer is empty */
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while ((!i2c_flag_get(I2C0, 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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/* send the EEPROM's internal address to write to : only one byte address */
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i2c_data_transmit(I2C0, reg_addr);
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timeout = 0;
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} else {
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timeout = 0;
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state = I2C_START;
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read_cycle = RESET;
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printf("i2c master wait data buffer is empty timeout in READ!\n");
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}
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/* wait until BTC bit is set */
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while ((!i2c_flag_get(I2C0, I2C_FLAG_BTC)) && (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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timeout = 0;
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state = I2C_START;
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read_cycle = SET;
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} else {
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timeout = 0;
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state = I2C_START;
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||
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;
|
||
}
|