85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
//
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// Copyright 2023 Wenting Zhang <zephray@outlook.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "hardware/pwm.h"
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#include "config.h"
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#if defined(POWER_GPIO)
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#define PWR_EN_GPIO 21
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#define PWR_VCOM_GPIO 22
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#if defined(POWER_GPIO_VCOM_MEASURE)
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#define PWR_VCOM_EN_GPIO 28
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#define PWR_VCOM_MEN_GPIO 26
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#define PWR_VCOM_MEA_GPIO 27
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#endif
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void power_init(void) {
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gpio_put(PWR_EN_GPIO, 0);
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gpio_init(PWR_EN_GPIO);
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gpio_set_dir(PWR_EN_GPIO, GPIO_OUT);
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gpio_set_function(PWR_VCOM_GPIO, GPIO_FUNC_PWM);
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uint slice_num = pwm_gpio_to_slice_num(PWR_VCOM_GPIO);
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// Set period to 256 cycles
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pwm_set_wrap(slice_num, 255);
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pwm_set_gpio_level(PWR_VCOM_GPIO, 127);
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// 0 -3.421V
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// 127 -2.145V
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// 255 -0.987V
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#if defined(POWER_GPIO_VCOM_MEASURE)
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gpio_init(PWR_VCOM_EN_GPIO);
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gpio_put(PWR_VCOM_EN_GPIO, 0);
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gpio_set_dir(PWR_VCOM_EN_GPIO, GPIO_OUT);
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gpio_init(PWR_VCOM_MEN_GPIO);
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gpio_put(PWR_VCOM_MEN_GPIO, 1);
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gpio_set_dir(PWR_VCOM_MEN_GPIO, GPIO_OUT);
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#endif
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}
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void power_enable(bool en) {
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gpio_put(PWR_EN_GPIO, en);
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uint slice_num = pwm_gpio_to_slice_num(PWR_VCOM_GPIO);
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pwm_set_enabled(slice_num, en);
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}
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// vcom is in mV
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void power_set_vcom(int vcom) {
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// Adjustable range:
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// 0 = -3.27V
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// 255 = -0.70V
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int level = vcom / 10 + 324;
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uint8_t level_u8;
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if (level < 0)
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level_u8 = 0;
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else if (level > 255)
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level_u8 = 255;
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else
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level_u8 = level;
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pwm_set_gpio_level(PWR_VCOM_GPIO, level_u8);
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}
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#endif |