Improve robustness of AW20216 driver (#19849)
* added soft reset and auto lowpower for AW20216
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1 changed files with 19 additions and 0 deletions
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@ -1,4 +1,5 @@
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/* Copyright 2021 Jasper Chan
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* 2023 Huckies <https://github.com/Huckies>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -15,6 +16,7 @@
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*/
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#include "aw20216.h"
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#include "wait.h"
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#include "spi_master.h"
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/* The AW20216 appears to be somewhat similar to the IS31FL743, although quite
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@ -34,6 +36,8 @@
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#define AW_REG_CONFIGURATION 0x00 // PG0
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#define AW_REG_GLOBALCURRENT 0x01 // PG0
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#define AW_REG_RESET 0x2F // PG0
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#define AW_REG_MIXFUNCTION 0x46 // PG0
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// Default value of AW_REG_CONFIGURATION
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// D7:D4 = 1011, SWSEL (SW1~SW12 active)
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@ -41,7 +45,10 @@
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// D2:D1 = 00, OSDE (open/short detection enable)
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// D0 = 0, CHIPEN (write 1 to enable LEDs when hardware enable pulled high)
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#define AW_CONFIG_DEFAULT 0b10110000
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#define AW_MIXCR_DEFAULT 0b00000000
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#define AW_RESET_CMD 0xAE
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#define AW_CHIPEN 1
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#define AW_LPEN (0x01 << 1)
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#define AW_PWM_REGISTER_COUNT 216
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@ -94,6 +101,10 @@ static inline bool AW20216_write_register(pin_t cs_pin, uint8_t page, uint8_t re
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return AW20216_write(cs_pin, page, reg, &value, 1);
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}
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void AW20216_soft_reset(pin_t cs_pin) {
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AW20216_write_register(cs_pin, AW_PAGE_FUNCTION, AW_REG_RESET, AW_RESET_CMD);
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}
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static void AW20216_init_scaling(pin_t cs_pin) {
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// Set constant current to the max, control brightness with PWM
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for (uint8_t i = 0; i < AW_PWM_REGISTER_COUNT; i++) {
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@ -111,15 +122,23 @@ static inline void AW20216_soft_enable(pin_t cs_pin) {
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AW20216_write_register(cs_pin, AW_PAGE_FUNCTION, AW_REG_CONFIGURATION, AW_CONFIG_DEFAULT | AW_CHIPEN);
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}
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static inline void AW20216_auto_lowpower(pin_t cs_pin) {
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AW20216_write_register(cs_pin, AW_PAGE_FUNCTION, AW_REG_MIXFUNCTION, AW_MIXCR_DEFAULT | AW_LPEN);
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}
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void AW20216_init(pin_t cs_pin, pin_t en_pin) {
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setPinOutput(en_pin);
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writePinHigh(en_pin);
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AW20216_soft_reset(cs_pin);
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wait_ms(2);
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// Drivers should start with all scaling and PWM registers as off
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AW20216_init_current_limit(cs_pin);
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AW20216_init_scaling(cs_pin);
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AW20216_soft_enable(cs_pin);
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AW20216_auto_lowpower(cs_pin);
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}
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void AW20216_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
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