From 288c2313fe3b705a07166971210e91a33bb1add4 Mon Sep 17 00:00:00 2001 From: Ryan Date: Wed, 27 Sep 2023 14:37:06 +1000 Subject: is31fl3218: Add LED Matrix support (#22126) Co-authored-by: Joel Challis --- drivers/led/issi/is31fl3218-simple.c | 143 +++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 drivers/led/issi/is31fl3218-simple.c (limited to 'drivers/led/issi/is31fl3218-simple.c') diff --git a/drivers/led/issi/is31fl3218-simple.c b/drivers/led/issi/is31fl3218-simple.c new file mode 100644 index 0000000000..a78dedfcf1 --- /dev/null +++ b/drivers/led/issi/is31fl3218-simple.c @@ -0,0 +1,143 @@ +/* Copyright 2018 Jason Williams (Wilba) + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include "is31fl3218.h" +#include +#include "i2c_master.h" + +// These are the register addresses +#define IS31FL3218_REG_SHUTDOWN 0x00 +#define IS31FL3218_REG_PWM 0x01 +#define IS31FL3218_REG_CONTROL 0x13 +#define IS31FL3218_REG_UPDATE 0x16 +#define IS31FL3218_REG_RESET 0x17 + +#ifndef IS31FL3218_I2C_TIMEOUT +# define IS31FL3218_I2C_TIMEOUT 100 +#endif + +#ifndef IS31FL3218_I2C_PERSISTENCE +# define IS31FL3218_I2C_PERSISTENCE 0 +#endif + +// Reusable buffer for transfers +uint8_t g_twi_transfer_buffer[20]; + +// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining. +uint8_t g_pwm_buffer[18]; +bool g_pwm_buffer_update_required = false; + +uint8_t g_led_control_registers[3] = {0}; +bool g_led_control_registers_update_required = false; + +void is31fl3218_write_register(uint8_t reg, uint8_t data) { + g_twi_transfer_buffer[0] = reg; + g_twi_transfer_buffer[1] = data; +#if IS31FL3218_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) { + if (i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, g_twi_transfer_buffer, 2, IS31FL3218_I2C_TIMEOUT) == 0) break; + } +#else + i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, g_twi_transfer_buffer, 2, IS31FL3218_I2C_TIMEOUT); +#endif +} + +void is31fl3218_write_pwm_buffer(uint8_t *pwm_buffer) { + g_twi_transfer_buffer[0] = IS31FL3218_REG_PWM; + memcpy(g_twi_transfer_buffer + 1, pwm_buffer, 18); + +#if IS31FL3218_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) { + i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, g_twi_transfer_buffer, 19, IS31FL3218_I2C_TIMEOUT); + } +#else + i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, g_twi_transfer_buffer, 19, IS31FL3218_I2C_TIMEOUT); +#endif +} + +void is31fl3218_init(void) { + // In case we ever want to reinitialize (?) + is31fl3218_write_register(IS31FL3218_REG_RESET, 0x00); + + // Turn off software shutdown + is31fl3218_write_register(IS31FL3218_REG_SHUTDOWN, 0x01); + + // Set all PWM values to zero + for (uint8_t i = 0; i < 18; i++) { + is31fl3218_write_register(IS31FL3218_REG_PWM + i, 0x00); + } + + // turn off all LEDs in the LED control register + for (uint8_t i = 0; i < 3; i++) { + is31fl3218_write_register(IS31FL3218_REG_CONTROL + i, 0x00); + } + + // Load PWM registers and LED Control register data + is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01); +} + +void is31fl3218_set_value(int index, uint8_t value) { + is31fl3218_led_t led; + if (index >= 0 && index < LED_MATRIX_LED_COUNT) { + memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led)); + } + if (g_pwm_buffer[led.v - IS31FL3218_REG_PWM] == value) { + return; + } + g_pwm_buffer[led.v - IS31FL3218_REG_PWM] = value; + g_pwm_buffer_update_required = true; +} + +void is31fl3218_set_value_all(uint8_t value) { + for (int i = 0; i < LED_MATRIX_LED_COUNT; i++) { + is31fl3218_set_value(i, value); + } +} + +void is31fl3218_set_led_control_register(uint8_t index, bool value) { + is31fl3218_led_t led; + memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led)); + + uint8_t control_register = (led.v - IS31FL3218_REG_PWM) / 6; + uint8_t bit_value = (led.v - IS31FL3218_REG_PWM) % 6; + + if (value) { + g_led_control_registers[control_register] |= (1 << bit_value); + } else { + g_led_control_registers[control_register] &= ~(1 << bit_value); + } + + g_led_control_registers_update_required = true; +} + +void is31fl3218_update_pwm_buffers(void) { + if (g_pwm_buffer_update_required) { + is31fl3218_write_pwm_buffer(g_pwm_buffer); + // Load PWM registers and LED Control register data + is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01); + + g_pwm_buffer_update_required = false; + } +} + +void is31fl3218_update_led_control_registers(void) { + if (g_led_control_registers_update_required) { + for (int i = 0; i < 3; i++) { + is31fl3218_write_register(IS31FL3218_REG_CONTROL + i, g_led_control_registers[i]); + } + + g_led_control_registers_update_required = false; + } +} -- cgit v1.2.3