140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
#include "FreeRTOS.h"
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#include "task.h"
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#include "dac7811.h"
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#include "ads1220.h"
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#include "spi.h"
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#include "gpio.h"
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#include "stm32f407xx.h"
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BOOL dac7811_spi_init_flag = FALSE;
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void fun_dac7811_spi1_init()
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{
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hspi1.Instance = SPI1;
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hspi1.Init.Mode = SPI_MODE_MASTER;
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hspi1.Init.Direction = SPI_DIRECTION_2LINES;
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hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
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hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
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hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
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hspi1.Init.NSS = SPI_NSS_SOFT;
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hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
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hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
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hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
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hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
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hspi1.Init.CRCPolynomial = 10;
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if (HAL_SPI_Init(&hspi1) != HAL_OK)
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{
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Error_Handler();
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}
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ADS1220_CS(GPIO_PIN_SET);
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//DAC7811_CS(GPIO_PIN_SET);
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}
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void fun_dac7811_operate(float32 *data_sv)
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{
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if (data_sv == NULL) return;
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if(*data_sv > 4000)
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{
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*data_sv = 4000;
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}
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else if (*data_sv < 0)
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{
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*data_sv = 0;
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}
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float32 temp = *data_sv;
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/**********在此处进行电阻输出（Ω）校准，temp为目标值**********/
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temp = calibrate_res_ohm_out(temp);
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if(temp > 4000)
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{
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temp = 4000;
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}
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else if (temp < 0)
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{
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temp = 0;
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}
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mux_signal.sv_calibrated = temp;
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/**********************************************************/
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uint16_t reg_data = (uint16_t)(temp);
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reg_data |= 0x1000;
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reg_data &= 0x1fff;
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if (dac7811_spi_init_flag == FALSE)
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{
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fun_dac7811_spi1_init();
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ads1220_spi_init_flag = FALSE;
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dac7811_spi_init_flag = TRUE;
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}
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else
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{
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//DAC7811_CS(GPIO_PIN_RESET);
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HAL_SPI_Transmit(&hspi1, (uint8_t *)(®_data), 1, 1000);
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//DAC7811_CS(GPIO_PIN_SET);
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}
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}
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uint8_t resohm_out_cal_enable = 0;
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float32 calibrate_res_ohm_out(float32 raw)
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{
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float result = 0;
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switch (resohm_out_cal_enable)
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{
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case 0: //开机后只读一次
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{
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uint16_t cal_check = 0;
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cal_check = eeprom_readdata(CAL_RES_OHM_OUT_ADDR_FLAG) << 8;
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cal_check |= eeprom_readdata(CAL_RES_OHM_OUT_ADDR_FLAG + 8) & 0x00FF;
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if(cal_check != 0xAAAA)
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{
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//不存在校准数据
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resohm_out_cal_enable = 2;
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}
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else
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{
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//存在校准数据
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resohm_out_cal_enable = 1;
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//将读到的数据存储至res_ohm_out_calibrate_table[CALIBRATE_RES_OHM_OUT_POINTS]
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eeprom_dataread_single(EEPROM_TAG_CAL_RES_OHM_OUT);
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}
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}
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break;
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case 1: //执行校准
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{
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//计算区间间隔（按照规定的点数，在量程范围内平均分配）
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float interval = (float32)(CALIBRATE_RES_OHM_OUT_END - CALIBRATE_RES_OHM_OUT_START)/(float32)(CALIBRATE_RES_OHM_OUT_POINTS - 1);
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for( uint8_t i = 0; i < CALIBRATE_RES_OHM_OUT_POINTS - 1; i++)
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{
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if( (cali_paras.cali_res_ohm_out[i] <= raw)&&(raw <= cali_paras.cali_res_ohm_out[i + 1]) )
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{
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result = CALIBRATE_RES_OHM_OUT_START + i*interval; //所处区间的左端点
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result += interval * (raw - cali_paras.cali_res_ohm_out[i])/(cali_paras.cali_res_ohm_out[i + 1] - cali_paras.cali_res_ohm_out[i]);
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break;
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}
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}
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}
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break;
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case 2: //不执行校准
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{
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result = raw;
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}
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break;
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default:
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break;
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}
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return result;
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}
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