305 lines
8.4 KiB
C
305 lines
8.4 KiB
C
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2018-05-07 aozima the first version
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* 2022-05-14 Stanley Lwin add pwm function
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*/
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#include <drivers/rt_drv_pwm.h>
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static rt_err_t _pwm_control(rt_device_t dev, int cmd, void *args)
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{
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rt_err_t result = RT_EOK;
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struct rt_device_pwm *pwm = (struct rt_device_pwm *)dev;
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if (pwm->ops->control)
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{
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result = pwm->ops->control(pwm, cmd, args);
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}
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return result;
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}
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/*
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pos: channel
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void *buffer: rt_uint32_t pulse[size]
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size : number of pulse, only set to sizeof(rt_uint32_t).
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*/
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static rt_size_t _pwm_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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rt_err_t result = RT_EOK;
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struct rt_device_pwm *pwm = (struct rt_device_pwm *)dev;
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rt_uint32_t *pulse = (rt_uint32_t *)buffer;
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struct rt_pwm_configuration configuration = {0};
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configuration.channel = pos;
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if (pwm->ops->control)
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{
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result = pwm->ops->control(pwm, PWM_CMD_GET, &configuration);
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if (result != RT_EOK)
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{
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return 0;
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}
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*pulse = configuration.pulse;
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}
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return size;
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}
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/*
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pos: channel
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void *buffer: rt_uint32_t pulse[size]
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size : number of pulse, only set to sizeof(rt_uint32_t).
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*/
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static rt_size_t _pwm_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
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{
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rt_err_t result = RT_EOK;
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struct rt_device_pwm *pwm = (struct rt_device_pwm *)dev;
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rt_uint32_t *pulse = (rt_uint32_t *)buffer;
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struct rt_pwm_configuration configuration = {0};
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configuration.channel = pos;
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if (pwm->ops->control)
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{
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result = pwm->ops->control(pwm, PWM_CMD_GET, &configuration);
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if (result != RT_EOK)
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{
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return 0;
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}
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configuration.pulse = *pulse;
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result = pwm->ops->control(pwm, PWM_CMD_SET, &configuration);
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if (result != RT_EOK)
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{
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return 0;
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}
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}
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return size;
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}
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#ifdef RT_USING_DEVICE_OPS
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static const struct rt_device_ops pwm_device_ops =
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{
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RT_NULL,
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RT_NULL,
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RT_NULL,
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_pwm_read,
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_pwm_write,
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_pwm_control
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};
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#endif /* RT_USING_DEVICE_OPS */
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rt_err_t rt_device_pwm_register(struct rt_device_pwm *device, const char *name, const struct rt_pwm_ops *ops, const void *user_data)
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{
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rt_err_t result = RT_EOK;
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rt_memset(device, 0, sizeof(struct rt_device_pwm));
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#ifdef RT_USING_DEVICE_OPS
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device->parent.ops = &pwm_device_ops;
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#else
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device->parent.init = RT_NULL;
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device->parent.open = RT_NULL;
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device->parent.close = RT_NULL;
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device->parent.read = _pwm_read;
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device->parent.write = _pwm_write;
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device->parent.control = _pwm_control;
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#endif /* RT_USING_DEVICE_OPS */
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device->parent.type = RT_Device_Class_PWM;
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device->ops = ops;
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device->parent.user_data = (void *)user_data;
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result = rt_device_register(&device->parent, name, RT_DEVICE_FLAG_RDWR);
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return result;
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}
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rt_err_t rt_pwm_enable(struct rt_device_pwm *device, int channel)
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{
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rt_err_t result = RT_EOK;
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struct rt_pwm_configuration configuration = {0};
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if (!device)
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{
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return -RT_EIO;
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}
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configuration.channel = (channel > 0) ? (channel) : (-channel); /* Make it is positive num forever */
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configuration.complementary = (channel > 0) ? (RT_FALSE) : (RT_TRUE); /* If nagetive, it's complementary */
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result = rt_device_control(&device->parent, PWM_CMD_ENABLE, &configuration);
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return result;
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}
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rt_err_t rt_pwm_disable(struct rt_device_pwm *device, int channel)
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{
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rt_err_t result = RT_EOK;
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struct rt_pwm_configuration configuration = {0};
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if (!device)
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{
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return -RT_EIO;
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}
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configuration.channel = (channel > 0) ? (channel) : (-channel); /* Make it is positive num forever */
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configuration.complementary = (channel > 0) ? (RT_FALSE) : (RT_TRUE); /* If nagetive, it's complementary */
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result = rt_device_control(&device->parent, PWM_CMD_DISABLE, &configuration);
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return result;
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}
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rt_err_t rt_pwm_set(struct rt_device_pwm *device, int channel, rt_uint32_t period, rt_uint32_t pulse)
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{
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rt_err_t result = RT_EOK;
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struct rt_pwm_configuration configuration = {0};
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if (!device)
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{
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return -RT_EIO;
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}
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configuration.channel = channel;
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configuration.period = period;
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configuration.pulse = pulse;
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result = rt_device_control(&device->parent, PWM_CMD_SET, &configuration);
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return result;
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}
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rt_err_t rt_pwm_get(struct rt_device_pwm *device, struct rt_pwm_configuration *cfg)
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{
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rt_err_t result = RT_EOK;
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if (!device)
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{
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return -RT_EIO;
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}
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result = rt_device_control(&device->parent, PWM_CMD_GET, cfg);
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return result;
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}
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#ifdef RT_USING_FINSH
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#include <stdlib.h>
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#include <string.h>
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#include <finsh.h>
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static int pwm(int argc, char **argv)
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{
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rt_err_t result = -RT_ERROR;
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char *result_str;
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static struct rt_device_pwm *pwm_device = RT_NULL;
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struct rt_pwm_configuration cfg = {0};
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if(argc > 1)
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{
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if(!strcmp(argv[1], "probe"))
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{
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if(argc == 3)
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{
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pwm_device = (struct rt_device_pwm *)rt_device_find(argv[2]);
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result_str = (pwm_device == RT_NULL) ? "failure" : "success";
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rt_kprintf("probe %s %s\n", argv[2], result_str);
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}
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else
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{
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rt_kprintf("pwm probe <device name> - probe pwm by name\n");
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}
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}
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else
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{
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if(pwm_device == RT_NULL)
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{
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rt_kprintf("Please using 'pwm probe <device name>' first.\n");
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return -RT_ERROR;
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}
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if(!strcmp(argv[1], "enable"))
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{
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if(argc == 3)
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{
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result = rt_pwm_enable(pwm_device, atoi(argv[2]));
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result_str = (result == RT_EOK) ? "success" : "failure";
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rt_kprintf("%s channel %d is enabled %s \n", pwm_device->parent.parent.name, atoi(argv[2]), result_str);
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}
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else
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{
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rt_kprintf("pwm enable <channel> - enable pwm channel\n");
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}
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}
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else if(!strcmp(argv[1], "disable"))
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{
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if(argc == 3)
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{
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result = rt_pwm_disable(pwm_device, atoi(argv[2]));
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}
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else
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{
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rt_kprintf("pwm disable <channel> - disable pwm channel\n");
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}
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}
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else if(!strcmp(argv[1], "get"))
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{
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cfg.channel = atoi(argv[2]);
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result = rt_pwm_get(pwm_device, &cfg);
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if(result == RT_EOK)
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{
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rt_kprintf("Info of device [%s] channel [%d]:\n",pwm_device, atoi(argv[2]));
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rt_kprintf("period : %d\n", cfg.period);
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rt_kprintf("pulse : %d\n", cfg.pulse);
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rt_kprintf("Duty cycle : %d%%\n",(int)(((double)(cfg.pulse)/(cfg.period)) * 100));
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}
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else
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{
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rt_kprintf("Get info of device: [%s] error.\n", pwm_device);
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}
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}
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else if (!strcmp(argv[1], "set"))
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{
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if(argc == 5)
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{
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result = rt_pwm_set(pwm_device, atoi(argv[2]), atoi(argv[3]), atoi(argv[4]));
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rt_kprintf("pwm info set on %s at channel %d\n",pwm_device,atoi(argv[2]));
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}
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else
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{
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rt_kprintf("Set info of device: [%s] error\n", pwm_device);
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rt_kprintf("Usage: pwm set <channel> <period> <pulse>\n");
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}
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}
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else
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{
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rt_kprintf("pwm get <channel> - get pwm channel info\n");
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}
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}
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}
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else
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{
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rt_kprintf("Usage: \n");
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rt_kprintf("pwm probe <device name> - probe pwm by name\n");
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rt_kprintf("pwm enable <channel> - enable pwm channel\n");
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rt_kprintf("pwm disable <channel>- disable pwm channel\n");
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rt_kprintf("pwm get <channel> - get pwm channel info\n");
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rt_kprintf("pwm set <channel> <period> <pulse> - set pwm channel info\n");
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result = - RT_ERROR;
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}
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return RT_EOK;
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}
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MSH_CMD_EXPORT(pwm, pwm [option]);
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#endif /* RT_USING_FINSH */
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