57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
#include "dac161s997.h"
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/**
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* @brief 向DAC161S997芯片写入寄存器值
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*
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* 该函数通过SPI接口向DAC161S997芯片写入指定的寄存器值。
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*
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* @param dac_num DAC芯片编号
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* @param reg 要写入的寄存器地址
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* @param data 要写入的数据，16位
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*/
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void dac161s997_write_reg(chip_type_e dac_num, uint8_t reg, uint16_t data)
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{
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uint8_t data_buffer[3] = {0, 0, 0};
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data_buffer[0] = reg;
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data_buffer[1] = data >> 8;
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data_buffer[2] = data;
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board_spi_init(dac_num); // 初始化SPI，因为ADC芯片也用SPI1，但是时序不同
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board_spi_cs_on(dac_num);
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spi_transmit_receive(&hspi1, data_buffer, 3);
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board_spi_cs_off(dac_num);
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}
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/**
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* @brief 初始化DAC161S997 DAC设备
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*/
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void dac161s997_init(void)
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{
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dac161s997_write_reg(DAC161S997_1, DAC161S997_ERR_LOW_REG, 0xFFFF);
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dac161s997_write_reg(DAC161S997_1, DAC161S997_ERR_CONFIG_REG, 0x070E);
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dac161s997_write_reg(DAC161S997_2, DAC161S997_ERR_LOW_REG, 0xFFFF);
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dac161s997_write_reg(DAC161S997_2, DAC161S997_ERR_CONFIG_REG, 0x070E);
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}
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/**
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* @brief DAC161S997芯片输出函数
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*
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* 此函数用于设置DAC161S997芯片的输出电流。
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*
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* @param dac_num DAC芯片类型
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* @param current 需要设置的电流值，单位：毫安
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*/
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void dac161s997_output(chip_type_e dac_num, float current)
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{
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uint32_t dac_code = (uint32_t)((current * 65535.0f) / 24.0f);
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uint8_t data_buffer[3] = {0, 0, 0};
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data_buffer[0] = DAC161S997_DACCODE_REG;
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data_buffer[1] = dac_code >> 8;
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data_buffer[2] = dac_code;
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board_spi_init(dac_num); // 初始化SPI，因为ADC芯片也用SPI1，但是时序不同
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board_spi_cs_on(dac_num);
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spi_transmit_receive(&hspi1, data_buffer, 3);
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board_spi_cs_off(dac_num);
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}
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