170 lines
5.8 KiB
C
170 lines
5.8 KiB
C
/* Copyright 2021 Jasper Chan
|
|
*
|
|
* 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 "aw20216.h"
|
|
#include "spi_master.h"
|
|
|
|
/* The AW20216 appears to be somewhat similar to the IS31FL743, although quite
|
|
* a few things are different, such as the command byte format and page ordering.
|
|
* The LED addresses start from 0x00 instead of 0x01.
|
|
*/
|
|
#define AWINIC_ID 0b1010 << 4
|
|
|
|
#define AW_PAGE_FUNCTION 0x00 << 1 // PG0, Function registers
|
|
#define AW_PAGE_PWM 0x01 << 1 // PG1, LED PWM control
|
|
#define AW_PAGE_SCALING 0x02 << 1 // PG2, LED current scaling control
|
|
#define AW_PAGE_PATCHOICE 0x03 << 1 // PG3, Pattern choice?
|
|
#define AW_PAGE_PWMSCALING 0x04 << 1 // PG4, LED PWM + Scaling control?
|
|
|
|
#define AW_WRITE 0
|
|
#define AW_READ 1
|
|
|
|
#define AW_REG_CONFIGURATION 0x00 // PG0
|
|
#define AW_REG_GLOBALCURRENT 0x01 // PG0
|
|
|
|
// Default value of AW_REG_CONFIGURATION
|
|
// D7:D4 = 1011, SWSEL (SW1~SW12 active)
|
|
// D3 = 0?, reserved (apparently this should be 1 but it doesn't seem to matter)
|
|
// D2:D1 = 00, OSDE (open/short detection enable)
|
|
// D0 = 0, CHIPEN (write 1 to enable LEDs when hardware enable pulled high)
|
|
#define AW_CONFIG_DEFAULT 0b10110000
|
|
#define AW_CHIPEN 1
|
|
|
|
#ifndef AW_SCALING_MAX
|
|
# define AW_SCALING_MAX 150
|
|
#endif
|
|
|
|
#ifndef AW_GLOBAL_CURRENT_MAX
|
|
# define AW_GLOBAL_CURRENT_MAX 150
|
|
#endif
|
|
|
|
#ifndef DRIVER_1_CS
|
|
# define DRIVER_1_CS B13
|
|
#endif
|
|
|
|
#ifndef DRIVER_1_EN
|
|
# define DRIVER_1_EN C13
|
|
#endif
|
|
|
|
#ifndef AW_SPI_DIVISOR
|
|
# define AW_SPI_DIVISOR 4
|
|
#endif
|
|
|
|
uint8_t g_spi_transfer_buffer[20] = {0};
|
|
aw_led g_pwm_buffer[DRIVER_LED_TOTAL];
|
|
bool g_pwm_buffer_update_required[DRIVER_LED_TOTAL];
|
|
|
|
bool AW20216_write_register(pin_t slave_pin, uint8_t page, uint8_t reg, uint8_t data) {
|
|
// Do we need to call spi_stop() if this fails?
|
|
if (!spi_start(slave_pin, false, 0, AW_SPI_DIVISOR)) {
|
|
return false;
|
|
}
|
|
|
|
g_spi_transfer_buffer[0] = (AWINIC_ID | page | AW_WRITE);
|
|
g_spi_transfer_buffer[1] = reg;
|
|
g_spi_transfer_buffer[2] = data;
|
|
|
|
if (spi_transmit(g_spi_transfer_buffer, 3) != SPI_STATUS_SUCCESS) {
|
|
spi_stop();
|
|
return false;
|
|
}
|
|
spi_stop();
|
|
return true;
|
|
}
|
|
|
|
bool AW20216_init_scaling(void) {
|
|
// Set constant current to the max, control brightness with PWM
|
|
aw_led led;
|
|
for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
|
|
led = g_aw_leds[i];
|
|
if (led.driver == 0) {
|
|
AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.r, AW_SCALING_MAX);
|
|
AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.g, AW_SCALING_MAX);
|
|
AW20216_write_register(DRIVER_1_CS, AW_PAGE_SCALING, led.b, AW_SCALING_MAX);
|
|
}
|
|
#ifdef DRIVER_2_CS
|
|
else if (led.driver == 1) {
|
|
AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.r, AW_SCALING_MAX);
|
|
AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.g, AW_SCALING_MAX);
|
|
AW20216_write_register(DRIVER_2_CS, AW_PAGE_SCALING, led.b, AW_SCALING_MAX);
|
|
}
|
|
#endif
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool AW20216_soft_enable(void) {
|
|
AW20216_write_register(DRIVER_1_CS, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
|
|
#ifdef DRIVER_2_CS
|
|
AW20216_write_register(DRIVER_2_CS, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
|
|
#endif
|
|
return true;
|
|
}
|
|
|
|
void AW20216_update_pwm(int index, uint8_t red, uint8_t green, uint8_t blue) {
|
|
aw_led led = g_aw_leds[index];
|
|
if (led.driver == 0) {
|
|
AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.r, red);
|
|
AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.g, green);
|
|
AW20216_write_register(DRIVER_1_CS, AW_PAGE_PWM, led.b, blue);
|
|
}
|
|
#ifdef DRIVER_2_CS
|
|
else if (led.driver == 1) {
|
|
AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.r, red);
|
|
AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.g, green);
|
|
AW20216_write_register(DRIVER_2_CS, AW_PAGE_PWM, led.b, blue);
|
|
}
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
void AW20216_init(void) {
|
|
// All LEDs should start with all scaling and PWM registers as off
|
|
setPinOutput(DRIVER_1_EN);
|
|
writePinHigh(DRIVER_1_EN);
|
|
AW20216_write_register(DRIVER_1_CS, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
|
|
#ifdef DRIVER_2_EN
|
|
setPinOutput(DRIVER_2_EN);
|
|
writePinHigh(DRIVER_2_EN);
|
|
AW20216_write_register(DRIVER_2_CS, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
|
|
#endif
|
|
AW20216_init_scaling();
|
|
AW20216_soft_enable();
|
|
return;
|
|
}
|
|
|
|
void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
|
|
g_pwm_buffer[index].r = red;
|
|
g_pwm_buffer[index].g = green;
|
|
g_pwm_buffer[index].b = blue;
|
|
g_pwm_buffer_update_required[index] = true;
|
|
return;
|
|
}
|
|
void AW20216_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
|
|
for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
|
|
AW20216_set_color(i, red, green, blue);
|
|
}
|
|
return;
|
|
}
|
|
void AW20216_update_pwm_buffers(void) {
|
|
for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) {
|
|
if (g_pwm_buffer_update_required[i]) {
|
|
AW20216_update_pwm(i, g_pwm_buffer[i].r, g_pwm_buffer[i].g, g_pwm_buffer[i].b);
|
|
g_pwm_buffer_update_required[i] = false;
|
|
}
|
|
}
|
|
return;
|
|
}
|