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171 lines
5.3 KiB
171 lines
5.3 KiB
/* Copyright 2021 Jasper Chan
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* 2023 Huckies <https://github.com/Huckies>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "aw20216s.h"
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#include "wait.h"
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#include "spi_master.h"
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#define AW20216S_PWM_REGISTER_COUNT 216
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#ifndef AW20216S_CONFIGURATION
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# define AW20216S_CONFIGURATION (AW20216S_CONFIGURATION_SWSEL_1_12 | AW20216S_CONFIGURATION_CHIPEN)
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#endif
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#ifndef AW20216S_MIX_FUNCTION
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# define AW20216S_MIX_FUNCTION (AW20216S_MIX_FUNCTION_LPEN)
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#endif
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#ifndef AW20216S_SCALING_MAX
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# define AW20216S_SCALING_MAX 150
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#endif
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#ifndef AW20216S_GLOBAL_CURRENT_MAX
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# define AW20216S_GLOBAL_CURRENT_MAX 150
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#endif
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#ifndef AW20216S_SPI_MODE
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# define AW20216S_SPI_MODE 0
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#endif
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#ifndef AW20216S_SPI_DIVISOR
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# define AW20216S_SPI_DIVISOR 4
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#endif
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typedef struct aw20216s_driver_t {
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uint8_t pwm_buffer[AW20216S_PWM_REGISTER_COUNT];
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bool pwm_buffer_dirty;
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} PACKED aw20216s_driver_t;
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aw20216s_driver_t driver_buffers[AW20216S_DRIVER_COUNT] = {{
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.pwm_buffer = {0},
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.pwm_buffer_dirty = false,
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}};
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bool aw20216s_write(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t* data, uint8_t len) {
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static uint8_t s_spi_transfer_buffer[2] = {0};
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if (!spi_start(cs_pin, false, AW20216S_SPI_MODE, AW20216S_SPI_DIVISOR)) {
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spi_stop();
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return false;
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}
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s_spi_transfer_buffer[0] = (AW20216S_ID | page | AW20216S_WRITE);
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s_spi_transfer_buffer[1] = reg;
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if (spi_transmit(s_spi_transfer_buffer, 2) != SPI_STATUS_SUCCESS) {
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spi_stop();
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return false;
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}
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if (spi_transmit(data, len) != SPI_STATUS_SUCCESS) {
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spi_stop();
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return false;
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}
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spi_stop();
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return true;
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}
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static inline bool aw20216s_write_register(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t value) {
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// Little wrapper so callers need not care about sending a buffer
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return aw20216s_write(cs_pin, page, reg, &value, 1);
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}
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void aw20216s_soft_reset(pin_t cs_pin) {
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aw20216s_write_register(cs_pin, AW20216S_PAGE_FUNCTION, AW20216S_FUNCTION_REG_RESET, AW20216S_RESET_MAGIC);
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}
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static void aw20216s_init_scaling(pin_t cs_pin) {
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// Set constant current to the max, control brightness with PWM
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for (uint8_t i = 0; i < AW20216S_PWM_REGISTER_COUNT; i++) {
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aw20216s_write_register(cs_pin, AW20216S_PAGE_SCALING, i, AW20216S_SCALING_MAX);
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}
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}
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static inline void aw20216s_init_current_limit(pin_t cs_pin) {
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// Push config
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aw20216s_write_register(cs_pin, AW20216S_PAGE_FUNCTION, AW20216S_FUNCTION_REG_GLOBAL_CURRENT, AW20216S_GLOBAL_CURRENT_MAX);
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}
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static inline void aw20216s_soft_enable(pin_t cs_pin) {
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// Push config
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aw20216s_write_register(cs_pin, AW20216S_PAGE_FUNCTION, AW20216S_FUNCTION_REG_CONFIGURATION, AW20216S_CONFIGURATION);
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}
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static inline void aw20216s_auto_lowpower(pin_t cs_pin) {
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aw20216s_write_register(cs_pin, AW20216S_PAGE_FUNCTION, AW20216S_FUNCTION_REG_MIX_FUNCTION, AW20216S_MIX_FUNCTION);
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}
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void aw20216s_init_drivers(void) {
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spi_init();
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#if defined(AW20216S_EN_PIN)
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gpio_set_pin_output(AW20216S_EN_PIN);
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gpio_write_pin_high(AW20216S_EN_PIN);
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#endif
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aw20216s_init(AW20216S_CS_PIN_1);
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#if defined(AW20216S_CS_PIN_2)
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aw20216s_init(AW20216S_CS_PIN_2);
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#endif
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}
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void aw20216s_init(pin_t cs_pin) {
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aw20216s_soft_reset(cs_pin);
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wait_ms(2);
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// Drivers should start with all scaling and PWM registers as off
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aw20216s_init_current_limit(cs_pin);
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aw20216s_init_scaling(cs_pin);
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aw20216s_soft_enable(cs_pin);
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aw20216s_auto_lowpower(cs_pin);
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}
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void aw20216s_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
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aw20216s_led_t led;
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memcpy_P(&led, (&g_aw20216s_leds[index]), sizeof(led));
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if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) {
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return;
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}
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driver_buffers[led.driver].pwm_buffer[led.r] = red;
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driver_buffers[led.driver].pwm_buffer[led.g] = green;
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driver_buffers[led.driver].pwm_buffer[led.b] = blue;
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driver_buffers[led.driver].pwm_buffer_dirty = true;
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}
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void aw20216s_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
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for (uint8_t i = 0; i < AW20216S_LED_COUNT; i++) {
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aw20216s_set_color(i, red, green, blue);
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}
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}
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void aw20216s_update_pwm_buffers(pin_t cs_pin, uint8_t index) {
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if (driver_buffers[index].pwm_buffer_dirty) {
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aw20216s_write(cs_pin, AW20216S_PAGE_PWM, 0, driver_buffers[index].pwm_buffer, AW20216S_PWM_REGISTER_COUNT);
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driver_buffers[index].pwm_buffer_dirty = false;
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}
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}
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void aw20216s_flush(void) {
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aw20216s_update_pwm_buffers(AW20216S_CS_PIN_1, 0);
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#if defined(AW20216S_CS_PIN_2)
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aw20216s_update_pwm_buffers(AW20216S_CS_PIN_2, 1);
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#endif
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}
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