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233 lines
7.3 KiB
233 lines
7.3 KiB
2 years ago
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// i2c_ads1115.c
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#include "i2c_ads1115.h"
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#include "stdlib.h"
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#include "stdio.h"
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/*
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多路测量的话, 需要配置不同的 config_H config_L
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*/
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static I2C_HandleTypeDef *pADS1115_I2C = &hi2c1;
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osThreadId_t ads1115TaskHandle;
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const osThreadAttr_t ads1115Task_attributes = {
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.name = "ads1115Task",
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.stack_size = 256 * 4,
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.priority = (osPriority_t) osPriorityNormal,
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};
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osEventFlagsId_t ads1115EventHandle;
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const osEventFlagsAttr_t ads1115Event_attributes = {
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.name = "ads1115Event"
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};
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// ads1115EventHandle = osEventFlagsNew (&ads1115Event_attributes);
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// typedef enum
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// {
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// EV_READY, /*!< Startup finished. */
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// EV_FRAME_RECEIVED, /*!< Frame received. */
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// EV_EXECUTE, /*!< Execute function. */
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// EV_FRAME_SENT /*!< Frame sent. */
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// } eMBEventType;
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// osEventFlagsSet(modbusEventHandle,eEvent);
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// osEventFlagsClear (osEventFlagsId_t ef_id, uint32_t flags)
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// recvedEvent = osEventFlagsWait (modbusEventHandle,
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// EV_READY | EV_FRAME_RECEIVED | EV_EXECUTE |
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// EV_FRAME_SENT, /* 接收任务感兴趣的事件 */
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// 0,
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// portMAX_DELAY); /* 指定超时事件,无限等待 */
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ADS1115_TypeDef my_ads1115 =
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{
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ads1115_init,
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NULL,
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ADS1115_REG_CONFIG_OS_START,
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ADS1115_REG_CONFIG_MUX_SINGLE_0,
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ADS1115_REG_CONFIG_PGA_4,
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ADS1115_REG_CONFIG_MODE_SINGLE,
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ADS1115_REG_CONFIG_DR_128,
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ADS1115_REG_CONFIG_COMP_MODE_TRADITIONAL,
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ADS1115_REG_CONFIG_COMP_POL_LOW,
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ADS1115_REG_CONFIG_COMP_LAT_NONLATCH,
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ADS1115_REG_CONFIG_COMP_QUE_DIS,
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0,
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0,
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0,
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{ 0, 0, 0 },
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ADS1115_OUTPUT_UNIT_mv, // 默认输出毫伏
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};
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void ads1115_task(void)
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{
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uint32_t event_flags;
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for (;;)
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{
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// 启用中断发送,判断状态,
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// 地址中断， 确认是哪I2C 设备通讯
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/* code */
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/* TODO 统一的超时机制 */
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/* 事件来管理 */
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event_flags = osEventFlagsWait (
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ads1115EventHandle
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, ADS1115_Event_READY|ADS1115_Event_INIT|ADS1115_Event_TRANS_ONLY|ADS1115_Event_DATA_RCV
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, 0
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, portMAX_DELAY );
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if ( event_flags & (ADS1115_Event_READY|ADS1115_Event_INIT)
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== (ADS1115_Event_READY|ADS1115_Event_INIT) )
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{
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// if (HAL_I2C_GetError(&hi2c1)!= HAL_I2C_ERROR_AF)
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// {
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// Error_Handler();
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// }
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// if (HAL_I2C_GetState(&hi2c1)!= HAL_I2C_STATE_READY)
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// {
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// Error_Handler();
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// }
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osEventFlagsClear(ads1115EventHandle, ADS1115_Event_INIT);
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osEventFlagsSet(ads1115EventHandle, ADS1115_Event_INIT_SUCCESS);
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}
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if ( event_flags & ( ADS1115_Event_READY|ADS1115_Event_TRANS_ONLY )
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== (ADS1115_Event_READY|ADS1115_Event_TRANS_ONLY) )
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{
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osEventFlagsClear(ads1115EventHandle, ADS1115_Event_TRANS_ONLY);
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}
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if ( event_flags & ( ADS1115_Event_READY|ADS1115_Event_TRANS_FOR_DATA )
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== (ADS1115_Event_READY|ADS1115_Event_TRANS_FOR_DATA) )
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{
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osEventFlagsClear(ads1115EventHandle, ADS1115_Event_TRANS_FOR_DATA);
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osEventFlagsSet(ads1115EventHandle, ADS1115_Event_DATA_RCV);
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}
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if ( event_flags & ( ADS1115_Event_READY|ADS1115_Event_DATA_RCV )
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== ( ADS1115_Event_READY|ADS1115_Event_DATA_RCV ) )
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{
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osEventFlagsClear( ads1115EventHandle, ADS1115_Event_DATA_RCV );
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}
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// __HAL_I2C_GET_FLAG(&hi2c1, I2C_FLAG_TXE) ;
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osDelay(20);
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}
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}
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void ads1115_port(void)
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{
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ads1115TaskHandle = osThreadNew(ads1115_task, NULL, &ads1115Task_attributes);
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ads1115EventHandle = osEventFlagsNew (&ads1115Event_attributes);
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}
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/**
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* @brief
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* @param [in] ads1115_I2cHandle
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* @param [in] pointADD -- 读的寄存器地址
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* @param [in] configH
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* @param [in] configL
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*
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* @details
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*/
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int ads1115_init()
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{
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uint8_t reg_data[3];
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my_ads1115.hi2c= pADS1115_I2C;
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my_ads1115.config_H = my_ads1115.config_os|my_ads1115.config_mux
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|my_ads1115.config_PGA|my_ads1115.config_MODE;
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my_ads1115.config_L = my_ads1115.config_DR|my_ads1115.config_COMP_MODE|my_ads1115.config_COMP_POL
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|my_ads1115.config_COMP_LAT|my_ads1115.config_COMP_QUE ;
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reg_data[0] = 0x01; // point addr 8bit 配置寄存器
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reg_data[1] = my_ads1115.config_H; // config_reg 高位
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reg_data[2] = my_ads1115.config_L; // config_reg 低位
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// TODO 阻塞式， 改为 DMA 中断模式， 配合定时器 ， 或启用中断等待
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// while (HAL_I2C_Master_Transmit(pADS1115_I2C, ADS1115_WRITE_ADDRESS, reg_data, 3, 2000) != HAL_OK)
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// {
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// if (HAL_I2C_GetError(pADS1115_I2C) != HAL_I2C_ERROR_AF)
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// {
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// printf("ads1115 Config Register error!!!\r\n");
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// }
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// }
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osEventFlagsSet ( ads1115TaskHandle, ADS1115_Event_INIT );
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if (HAL_I2C_Master_Transmit_IT(pADS1115_I2C, ADS1115_WRITE_ADDRESS, reg_data, 3 ) != HAL_OK)
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{
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return -1;
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}
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return 0;
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}
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int ads1115_setup(ADS1115_REG_CONFIG_MUX_Diff_TypeDef mux)
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{
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my_ads1115.config_H &= ~0x70;
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my_ads1115.config_H &= mux;
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return 0;
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}
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int16_t ads1115_read_data( )
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{
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int16_t data;
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uint8_t rx_data[2] = {0};
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// TODO 阻塞式， 改为 DMA 中断模式
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// 读寄存器 0x00 十六位
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while (HAL_I2C_Master_Transmit(pADS1115_I2C, ADS1115_WRITE_ADDRESS, 0x00, 1, 2000) != HAL_OK)
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{
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if (HAL_I2C_GetError(pADS1115_I2C) != HAL_I2C_ERROR_AF)
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{
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printf("ads1115 convert Register error!!!\r\n");
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}
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}
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// 读两位
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while (HAL_I2C_Master_Receive(pADS1115_I2C, ADS1115_READ_ADDRESS, rx_data, 2, 2000) != HAL_OK)
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{
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if ( HAL_I2C_GetError(pADS1115_I2C) != HAL_I2C_ERROR_AF )
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{
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printf("ads1115 read data error!!!\r\n");
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}
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}
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data = rx_data[0] * 256 + rx_data[1];
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return data;
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}
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double ads1115_get_voltage_val( )
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{
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double val;
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int16_t ad_val;
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// TODO 去掉延时，使用寄存器的指示, setup 和读取数据分开执行
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// ads1115_setup( pADS1115_I2C, pointADD, configH, configL );
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ads1115_setup( ADS1115_REG_CONFIG_MUX_SINGLE_0 );
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HAL_Delay(10);
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ad_val = ads1115_read_data( pADS1115_I2C );
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if ( (ad_val == 0x7FFF) | (ad_val == 0X8000)) // 是否超量程了
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{
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ad_val = 0;
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// printf("over PGA\r\n");
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}
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switch ((0x0E & my_ads1115.config_H) >> 1) // 量程对应的分辨率
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{
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case (0x00):
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val = (double)ad_val * 187.5 / 1000.0; //
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break;
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case (0x01):
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val = (double)ad_val * 125 / 1000.0;
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break;
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case (0x02):
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val = (double)ad_val * 62.5 / 1000.0;
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break;
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case (0x03):
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val = (double)ad_val * 31.25 / 1000.0;
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break;
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case (0x04):
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val = (double)ad_val * 15.625 / 1000.0;
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break;
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case (0x05):
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val = (double)ad_val * 7.8125 / 1000.0;
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break;
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}
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return (my_ads1115.unit == ADS1115_OUTPUT_UNIT_mv)?val:(val/1000.0);
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}
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