forked from xuos/xiuos
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*
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* Copyright (c) 2020 AIIT XUOS Lab
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* XiUOS is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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/**
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* @file: test_dac.c
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* @brief: a application of dac function
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* @version: 2.0
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* @author: AIIT XUOS Lab
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* @date: 2022/1/11
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*/
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#include <stdio.h>
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#include <string.h>
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#include <transform.h>
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void test_dac()
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{
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int dac_fd;
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uint16 dac_set_value = 800;
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uint16 dac_sample, dac_value_decimal = 0;
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float dac_value;
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dac_fd = PrivOpen(DAC_DEV_DRIVER, O_RDWR);
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if (dac_fd < 0) {
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KPrintf("open dac fd error %d\n", dac_fd);
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return;
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}
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struct PrivIoctlCfg ioctl_cfg;
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ioctl_cfg.ioctl_driver_type = DAC_TYPE;
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ioctl_cfg.args = &dac_set_value;
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if (0 != PrivIoctl(dac_fd, OPE_CFG, &ioctl_cfg)) {
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KPrintf("ioctl dac fd error %d\n", dac_fd);
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PrivClose(dac_fd);
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return;
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}
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PrivRead(dac_fd, &dac_sample, 2);
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dac_value = (float)dac_sample * (3.3 / 4096);//Vref+ need to be 3.3V
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dac_value_decimal = (dac_value - (uint16)dac_value) * 1000;
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printf("dac sample %u value integer %u decimal %u\n", dac_sample, (uint16)dac_value, dac_value_decimal);
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PrivClose(dac_fd);
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return;
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}
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SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0)|SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN),
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test_dac, test_dac, set digital data to dac);
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