143 lines
4.6 KiB
C
143 lines
4.6 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
|
|
|
|
#define AW_PWM_REGISTER_COUNT 216
|
|
|
|
#ifndef AW_SCALING_MAX
|
|
# define AW_SCALING_MAX 150
|
|
#endif
|
|
|
|
#ifndef AW_GLOBAL_CURRENT_MAX
|
|
# define AW_GLOBAL_CURRENT_MAX 150
|
|
#endif
|
|
|
|
#ifndef AW_SPI_DIVISOR
|
|
# define AW_SPI_DIVISOR 4
|
|
#endif
|
|
|
|
uint8_t g_pwm_buffer[DRIVER_COUNT][AW_PWM_REGISTER_COUNT];
|
|
bool g_pwm_buffer_update_required[DRIVER_COUNT] = {false};
|
|
|
|
bool AW20216_write(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t* data, uint8_t len) {
|
|
static uint8_t s_spi_transfer_buffer[2] = {0};
|
|
|
|
if (!spi_start(cs_pin, false, 0, AW_SPI_DIVISOR)) {
|
|
spi_stop();
|
|
return false;
|
|
}
|
|
|
|
s_spi_transfer_buffer[0] = (AWINIC_ID | page | AW_WRITE);
|
|
s_spi_transfer_buffer[1] = reg;
|
|
|
|
if (spi_transmit(s_spi_transfer_buffer, 2) != SPI_STATUS_SUCCESS) {
|
|
spi_stop();
|
|
return false;
|
|
}
|
|
|
|
if (spi_transmit(data, len) != SPI_STATUS_SUCCESS) {
|
|
spi_stop();
|
|
return false;
|
|
}
|
|
|
|
spi_stop();
|
|
return true;
|
|
}
|
|
|
|
static inline bool AW20216_write_register(pin_t cs_pin, uint8_t page, uint8_t reg, uint8_t value) {
|
|
// Little wrapper so callers need not care about sending a buffer
|
|
return AW20216_write(cs_pin, page, reg, &value, 1);
|
|
}
|
|
|
|
static void AW20216_init_scaling(pin_t cs_pin) {
|
|
// Set constant current to the max, control brightness with PWM
|
|
for (uint8_t i = 0; i < AW_PWM_REGISTER_COUNT; i++) {
|
|
AW20216_write_register(cs_pin, AW_PAGE_SCALING, i, AW_SCALING_MAX);
|
|
}
|
|
}
|
|
|
|
static inline void AW20216_init_current_limit(pin_t cs_pin) {
|
|
// Push config
|
|
AW20216_write_register(cs_pin, AW_PAGE_FUNCTION, AW_REG_GLOBALCURRENT, AW_GLOBAL_CURRENT_MAX);
|
|
}
|
|
|
|
static inline void AW20216_soft_enable(pin_t cs_pin) {
|
|
// Push config
|
|
AW20216_write_register(cs_pin, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
|
|
}
|
|
|
|
void AW20216_init(pin_t cs_pin, pin_t en_pin) {
|
|
setPinOutput(en_pin);
|
|
writePinHigh(en_pin);
|
|
|
|
// Drivers should start with all scaling and PWM registers as off
|
|
AW20216_init_current_limit(cs_pin);
|
|
AW20216_init_scaling(cs_pin);
|
|
|
|
AW20216_soft_enable(cs_pin);
|
|
}
|
|
|
|
void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
|
|
aw_led led;
|
|
memcpy_P(&led, (&g_aw_leds[index]), sizeof(led));
|
|
|
|
g_pwm_buffer[led.driver][led.r] = red;
|
|
g_pwm_buffer[led.driver][led.g] = green;
|
|
g_pwm_buffer[led.driver][led.b] = blue;
|
|
g_pwm_buffer_update_required[led.driver] = true;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
void AW20216_update_pwm_buffers(pin_t cs_pin, uint8_t index) {
|
|
if (g_pwm_buffer_update_required[index]) {
|
|
AW20216_write(cs_pin, AW_PAGE_PWM, 0, g_pwm_buffer[index], AW_PWM_REGISTER_COUNT);
|
|
}
|
|
g_pwm_buffer_update_required[index] = false;
|
|
}
|