253 lines
9.5 KiB
C
253 lines
9.5 KiB
C
/* Copyright 2018 Jason Williams (Wilba)
|
|
* Copyright 2021 Doni Crosby
|
|
*
|
|
* 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 "is31fl3736-simple.h"
|
|
#include <string.h>
|
|
#include "i2c_master.h"
|
|
#include "wait.h"
|
|
|
|
#define IS31FL3736_PWM_REGISTER_COUNT 192 // actually 96
|
|
#define IS31FL3736_LED_CONTROL_REGISTER_COUNT 24
|
|
|
|
#ifndef IS31FL3736_I2C_TIMEOUT
|
|
# define IS31FL3736_I2C_TIMEOUT 100
|
|
#endif
|
|
|
|
#ifndef IS31FL3736_I2C_PERSISTENCE
|
|
# define IS31FL3736_I2C_PERSISTENCE 0
|
|
#endif
|
|
|
|
#ifndef IS31FL3736_PWM_FREQUENCY
|
|
# define IS31FL3736_PWM_FREQUENCY IS31FL3736_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3736B only
|
|
#endif
|
|
|
|
#ifndef IS31FL3736_SW_PULLUP
|
|
# define IS31FL3736_SW_PULLUP IS31FL3736_PUR_0_OHM
|
|
#endif
|
|
|
|
#ifndef IS31FL3736_CS_PULLDOWN
|
|
# define IS31FL3736_CS_PULLDOWN IS31FL3736_PDR_0_OHM
|
|
#endif
|
|
|
|
#ifndef IS31FL3736_GLOBAL_CURRENT
|
|
# define IS31FL3736_GLOBAL_CURRENT 0xFF
|
|
#endif
|
|
|
|
// Transfer buffer for TWITransmitData()
|
|
uint8_t g_twi_transfer_buffer[20];
|
|
|
|
// These buffers match the IS31FL3736 PWM registers.
|
|
// The control buffers match the PG0 LED On/Off registers.
|
|
// Storing them like this is optimal for I2C transfers to the registers.
|
|
// We could optimize this and take out the unused registers from these
|
|
// buffers and the transfers in is31fl3736_write_pwm_buffer() but it's
|
|
// probably not worth the extra complexity.
|
|
uint8_t g_pwm_buffer[IS31FL3736_DRIVER_COUNT][IS31FL3736_PWM_REGISTER_COUNT];
|
|
bool g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false};
|
|
|
|
uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0};
|
|
bool g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT] = {false};
|
|
|
|
void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
|
|
g_twi_transfer_buffer[0] = reg;
|
|
g_twi_transfer_buffer[1] = data;
|
|
|
|
#if IS31FL3736_I2C_PERSISTENCE > 0
|
|
for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
|
|
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT) == 0) break;
|
|
}
|
|
#else
|
|
i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT);
|
|
#endif
|
|
}
|
|
|
|
void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
|
|
// assumes PG1 is already selected
|
|
|
|
// transmit PWM registers in 12 transfers of 16 bytes
|
|
// g_twi_transfer_buffer[] is 20 bytes
|
|
|
|
// iterate over the pwm_buffer contents at 16 byte intervals
|
|
for (int i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) {
|
|
g_twi_transfer_buffer[0] = i;
|
|
// copy the data from i to i+15
|
|
// device will auto-increment register for data after the first byte
|
|
// thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer
|
|
memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 16);
|
|
|
|
#if IS31FL3736_I2C_PERSISTENCE > 0
|
|
for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
|
|
if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT) == 0) break;
|
|
}
|
|
#else
|
|
i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void is31fl3736_init_drivers(void) {
|
|
i2c_init();
|
|
|
|
is31fl3736_init(IS31FL3736_I2C_ADDRESS_1);
|
|
#if defined(IS31FL3736_I2C_ADDRESS_2)
|
|
is31fl3736_init(IS31FL3736_I2C_ADDRESS_2);
|
|
# if defined(IS31FL3736_I2C_ADDRESS_3)
|
|
is31fl3736_init(IS31FL3736_I2C_ADDRESS_3);
|
|
# if defined(IS31FL3736_I2C_ADDRESS_4)
|
|
is31fl3736_init(IS31FL3736_I2C_ADDRESS_4);
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
|
|
is31fl3736_set_led_control_register(i, true);
|
|
}
|
|
|
|
is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_1, 0);
|
|
#if defined(IS31FL3736_I2C_ADDRESS_2)
|
|
is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_2, 1);
|
|
# if defined(IS31FL3736_I2C_ADDRESS_3)
|
|
is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_3, 2);
|
|
# if defined(IS31FL3736_I2C_ADDRESS_4)
|
|
is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_4, 3);
|
|
# endif
|
|
# endif
|
|
#endif
|
|
}
|
|
|
|
void is31fl3736_init(uint8_t addr) {
|
|
// In order to avoid the LEDs being driven with garbage data
|
|
// in the LED driver's PWM registers, shutdown is enabled last.
|
|
// Set up the mode and other settings, clear the PWM registers,
|
|
// then disable software shutdown.
|
|
|
|
// Unlock the command register.
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
|
|
|
|
// Select PG0
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_LED_CONTROL);
|
|
// Turn off all LEDs.
|
|
for (int i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
|
|
is31fl3736_write_register(addr, i, 0x00);
|
|
}
|
|
|
|
// Unlock the command register.
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
|
|
|
|
// Select PG1
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_PWM);
|
|
// Set PWM on all LEDs to 0
|
|
// No need to setup Breath registers to PWM as that is the default.
|
|
for (int i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i++) {
|
|
is31fl3736_write_register(addr, i, 0x00);
|
|
}
|
|
|
|
// Unlock the command register.
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
|
|
|
|
// Select PG3
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_FUNCTION);
|
|
// Set de-ghost pull-up resistors (SWx)
|
|
is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP);
|
|
// Set de-ghost pull-down resistors (CSx)
|
|
is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN);
|
|
// Set global current to maximum.
|
|
is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT);
|
|
// Disable software shutdown.
|
|
is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01);
|
|
|
|
// Wait 10ms to ensure the device has woken up.
|
|
wait_ms(10);
|
|
}
|
|
|
|
void is31fl3736_set_value(int index, uint8_t value) {
|
|
is31fl3736_led_t led;
|
|
if (index >= 0 && index < IS31FL3736_LED_COUNT) {
|
|
memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));
|
|
|
|
if (g_pwm_buffer[led.driver][led.v] == value) {
|
|
return;
|
|
}
|
|
g_pwm_buffer[led.driver][led.v] = value;
|
|
g_pwm_buffer_update_required[led.driver] = true;
|
|
}
|
|
}
|
|
|
|
void is31fl3736_set_value_all(uint8_t value) {
|
|
for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
|
|
is31fl3736_set_value(i, value);
|
|
}
|
|
}
|
|
|
|
void is31fl3736_set_led_control_register(uint8_t index, bool value) {
|
|
is31fl3736_led_t led;
|
|
memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));
|
|
|
|
// The PWM register for a matrix position (0x00 to 0xBF) is interleaved, so:
|
|
// A1=0x00 A2=0x02 A3=0x04 A4=0x06 A5=0x08 A6=0x0A A7=0x0C A8=0x0E
|
|
// B1=0x10 B2=0x12 B3=0x14
|
|
// But also, the LED control registers (0x00 to 0x17) are also interleaved, so:
|
|
// A1-A4=0x00 A5-A8=0x01
|
|
|
|
uint8_t control_register = led.v / 8;
|
|
uint8_t bit_value = led.v % 8;
|
|
|
|
if (value) {
|
|
g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
|
|
} else {
|
|
g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
|
|
}
|
|
|
|
g_led_control_registers_update_required[led.driver] = true;
|
|
}
|
|
|
|
void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index) {
|
|
if (g_pwm_buffer_update_required[index]) {
|
|
// Firstly we need to unlock the command register and select PG1
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_PWM);
|
|
|
|
is31fl3736_write_pwm_buffer(addr, g_pwm_buffer[index]);
|
|
g_pwm_buffer_update_required[index] = false;
|
|
}
|
|
}
|
|
|
|
void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) {
|
|
if (g_led_control_registers_update_required[index]) {
|
|
// Firstly we need to unlock the command register and select PG0
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
|
|
is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_LED_CONTROL);
|
|
for (int i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
|
|
is31fl3736_write_register(addr, i, g_led_control_registers[index][i]);
|
|
}
|
|
g_led_control_registers_update_required[index] = false;
|
|
}
|
|
}
|
|
|
|
void is31fl3736_flush(void) {
|
|
is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_1, 0);
|
|
#if defined(IS31FL3736_I2C_ADDRESS_2)
|
|
is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_2, 1);
|
|
# if defined(IS31FL3736_I2C_ADDRESS_3)
|
|
is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_3, 2);
|
|
# if defined(IS31FL3736_I2C_ADDRESS_4)
|
|
is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_4, 3);
|
|
# endif
|
|
# endif
|
|
#endif
|
|
}
|