160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
#include "FreeRTOS.h"
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#include "task.h"
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#include "dac8552.h"
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#include "gpio.h"
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#include "spi.h"
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dac8552x_object dac8552;
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void dac8552_cs(cs_state_type state)
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{
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if (state == CS_L)
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{
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DAC8552_SYNC(GPIO_PIN_RESET);
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}
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else
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{
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DAC8552_SYNC(GPIO_PIN_SET);
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}
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}
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void dac8552_transmit_data(uint8_t *data, uint16_t len)
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{
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HAL_SPI_Transmit(&hspi3, data, len, 1000);
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}
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void dac8552_init(dac8552x_object *dac, dac8552_write write, dac8552_chip_select cs)
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{
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if ((dac == NULL) || (write == NULL) || (cs == NULL))
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{
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return;
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}
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dac->write_data = write;
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dac->chip_selcet = cs;
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}
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void set_dac8552_channel_value(dac8552x_object *dac, dac8552_ld_type ld, dac8552_bs_type bs, dac8552_pd_type pd, uint16_t data)
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{
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uint32_t input = 0;
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uint8_t sdata[3];
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input = data;
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input = input | (ld << 20);
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input = input | (bs << 18);
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input = input | (pd << 16);
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sdata[0] = (uint8_t)(input >> 16);
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sdata[1] = (uint8_t)(input >> 8);
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sdata[2] = (uint8_t)input;
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dac->chip_selcet(CS_L);
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vTaskDelay(10);
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dac->write_data(sdata, 3);
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dac->chip_selcet(CS_H);
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}
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void dac8552_operation(float32 *data1, float32 *data2)
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{
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uint16_t data = 0;
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float32 temp1 = *data1, temp2 = *data2;
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dac8552_init(&dac8552, dac8552_transmit_data, dac8552_cs);
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if (data1 != NULL)
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{
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temp1 = calibrate_cur_ma(temp1);
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if(temp1 > 25.0f)
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{
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temp1 = 25.0f;
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}
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else if(temp1 < 0.0f)
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{
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temp1 = 0.0f;
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}
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mux_signal.sv_calibrated = temp1;
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temp1 = (temp1) * 100.0f;
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data = (uint16_t)(65535.0f * temp1 / 2500.0f);
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set_dac8552_channel_value(&dac8552, LD_CH_B, SEL_BUF_B, PD_NONE, data);
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// set_dac8552_channel_value(&dac8552, LD_CH_A, SEL_BUF_A, PD_NONE, data);
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}
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if (data2 != NULL)
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{
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//-2.5~2.5v输出
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if (*data2 < -2.5f)
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*data2 = -2.5f;
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else if (*data2 > 2.5f)
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*data2 = 2.5f;
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temp2 = (*data2) * 0.5f + 1.25f;
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data = (uint16_t)(65535.0f * temp2 / 2.5f);
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// set_dac8552_channel_value(&dac8552, LD_CH_B, SEL_BUF_B, PD_NONE, data);
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set_dac8552_channel_value(&dac8552, LD_CH_A, SEL_BUF_A, PD_NONE, data);
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}
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}
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float cur_ma_out_calibrate_table[CALIBRATE_CUR_MA_OUT_POINTS] = {0};
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uint8_t curma_out_cal_enable = 0;
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float32 calibrate_cur_ma(float32 raw)
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{
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float result = 0;
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switch (curma_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_CUR_MA_OUT_ADDR_FLAG) << 8;
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cal_check |= eeprom_readdata(CAL_CUR_MA_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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curma_out_cal_enable = 2;
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}
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else
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{
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curma_out_cal_enable = 2;
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// //存在校准数据
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// curma_out_cal_enable = 1;
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// //将读到的数据存储至cur_ma_out_calibrate_table[CALIBRATE_CUR_MA_OUT_POINTS]
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// eeprom_dataread_single(EEPROM_TAG_CAL_CUR_MA_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_CUR_MA_OUT_END - CALIBRATE_CUR_MA_OUT_START)/(float32)(CALIBRATE_CUR_MA_OUT_POINTS - 1);
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for( uint8_t i = 0; i < CALIBRATE_CUR_MA_OUT_POINTS - 1; i++)
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{
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if( (cur_ma_out_calibrate_table[i] <= raw)&&(raw <= cur_ma_out_calibrate_table[i + 1]) )
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{
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result = CALIBRATE_CUR_MA_OUT_START + i*interval; //所处区间的左端点
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result += interval * (raw - cur_ma_out_calibrate_table[i])/(cur_ma_out_calibrate_table[i + 1] - cur_ma_out_calibrate_table[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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