diff options
Diffstat (limited to 'drivers/led/issi/is31fl3218-mono.c')
-rw-r--r-- | drivers/led/issi/is31fl3218-mono.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/drivers/led/issi/is31fl3218-mono.c b/drivers/led/issi/is31fl3218-mono.c new file mode 100644 index 0000000000..d15745f637 --- /dev/null +++ b/drivers/led/issi/is31fl3218-mono.c @@ -0,0 +1,142 @@ +/* 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 <http://www.gnu.org/licenses/>. + */ + +#include "is31fl3218-mono.h" +#include "i2c_master.h" + +#define IS31FL3218_PWM_REGISTER_COUNT 18 +#define IS31FL3218_LED_CONTROL_REGISTER_COUNT 3 + +#ifndef IS31FL3218_I2C_TIMEOUT +# define IS31FL3218_I2C_TIMEOUT 100 +#endif + +#ifndef IS31FL3218_I2C_PERSISTENCE +# define IS31FL3218_I2C_PERSISTENCE 0 +#endif + +// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining. +uint8_t g_pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT]; +bool g_pwm_buffer_update_required = false; + +uint8_t g_led_control_registers[IS31FL3218_LED_CONTROL_REGISTER_COUNT] = {0}; +bool g_led_control_registers_update_required = false; + +void is31fl3218_write_register(uint8_t reg, uint8_t data) { +#if IS31FL3218_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) { + if (i2c_writeReg(IS31FL3218_I2C_ADDRESS << 1, reg, &data, 1, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; + } +#else + i2c_writeReg(IS31FL3218_I2C_ADDRESS << 1, reg, &data, 1, IS31FL3218_I2C_TIMEOUT); +#endif +} + +void is31fl3218_write_pwm_buffer(uint8_t *pwm_buffer) { +#if IS31FL3218_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) { + if (i2c_writeReg(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; + } +#else + i2c_writeReg(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT); +#endif +} + +void is31fl3218_init(void) { + i2c_init(); + + // 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 < IS31FL3218_PWM_REGISTER_COUNT; i++) { + is31fl3218_write_register(IS31FL3218_REG_PWM + i, 0x00); + } + + // turn off all LEDs in the LED control register + for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) { + is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, 0x00); + } + + // Load PWM registers and LED Control register data + is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01); + + for (int i = 0; i < IS31FL3218_LED_COUNT; i++) { + is31fl3218_set_led_control_register(i, true); + } + + is31fl3218_update_led_control_registers(); +} + +void is31fl3218_set_value(int index, uint8_t value) { + is31fl3218_led_t led; + + if (index >= 0 && index < IS31FL3218_LED_COUNT) { + memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led)); + + if (g_pwm_buffer[led.v] == value) { + return; + } + + g_pwm_buffer[led.v] = value; + g_pwm_buffer_update_required = true; + } +} + +void is31fl3218_set_value_all(uint8_t value) { + for (int i = 0; i < IS31FL3218_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 / 6; + uint8_t bit_value = led.v % 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 (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) { + is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, g_led_control_registers[i]); + } + + g_led_control_registers_update_required = false; + } +} |