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path: root/drivers/led/issi/is31fl3218-simple.c
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Diffstat (limited to 'drivers/led/issi/is31fl3218-simple.c')
-rw-r--r--drivers/led/issi/is31fl3218-simple.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/led/issi/is31fl3218-simple.c b/drivers/led/issi/is31fl3218-simple.c
new file mode 100644
index 0000000000..a78dedfcf1
--- /dev/null
+++ b/drivers/led/issi/is31fl3218-simple.c
@@ -0,0 +1,143 @@
+/* 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.h"
+#include <string.h>
+#include "i2c_master.h"
+
+// These are the register addresses
+#define IS31FL3218_REG_SHUTDOWN 0x00
+#define IS31FL3218_REG_PWM 0x01
+#define IS31FL3218_REG_CONTROL 0x13
+#define IS31FL3218_REG_UPDATE 0x16
+#define IS31FL3218_REG_RESET 0x17
+
+#ifndef IS31FL3218_I2C_TIMEOUT
+# define IS31FL3218_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3218_I2C_PERSISTENCE
+# define IS31FL3218_I2C_PERSISTENCE 0
+#endif
+
+// Reusable buffer for transfers
+uint8_t g_twi_transfer_buffer[20];
+
+// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
+uint8_t g_pwm_buffer[18];
+bool g_pwm_buffer_update_required = false;
+
+uint8_t g_led_control_registers[3] = {0};
+bool g_led_control_registers_update_required = false;
+
+void is31fl3218_write_register(uint8_t reg, uint8_t data) {
+ g_twi_transfer_buffer[0] = reg;
+ g_twi_transfer_buffer[1] = data;
+#if IS31FL3218_I2C_PERSISTENCE > 0
+ for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
+ if (i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, g_twi_transfer_buffer, 2, IS31FL3218_I2C_TIMEOUT) == 0) break;
+ }
+#else
+ i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, g_twi_transfer_buffer, 2, IS31FL3218_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3218_write_pwm_buffer(uint8_t *pwm_buffer) {
+ g_twi_transfer_buffer[0] = IS31FL3218_REG_PWM;
+ memcpy(g_twi_transfer_buffer + 1, pwm_buffer, 18);
+
+#if IS31FL3218_I2C_PERSISTENCE > 0
+ for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
+ i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, g_twi_transfer_buffer, 19, IS31FL3218_I2C_TIMEOUT);
+ }
+#else
+ i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, g_twi_transfer_buffer, 19, IS31FL3218_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3218_init(void) {
+ // 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 < 18; i++) {
+ is31fl3218_write_register(IS31FL3218_REG_PWM + i, 0x00);
+ }
+
+ // turn off all LEDs in the LED control register
+ for (uint8_t i = 0; i < 3; i++) {
+ is31fl3218_write_register(IS31FL3218_REG_CONTROL + i, 0x00);
+ }
+
+ // Load PWM registers and LED Control register data
+ is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
+}
+
+void is31fl3218_set_value(int index, uint8_t value) {
+ is31fl3218_led_t led;
+ if (index >= 0 && index < LED_MATRIX_LED_COUNT) {
+ memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
+ }
+ if (g_pwm_buffer[led.v - IS31FL3218_REG_PWM] == value) {
+ return;
+ }
+ g_pwm_buffer[led.v - IS31FL3218_REG_PWM] = value;
+ g_pwm_buffer_update_required = true;
+}
+
+void is31fl3218_set_value_all(uint8_t value) {
+ for (int i = 0; i < LED_MATRIX_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 - IS31FL3218_REG_PWM) / 6;
+ uint8_t bit_value = (led.v - IS31FL3218_REG_PWM) % 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 (int i = 0; i < 3; i++) {
+ is31fl3218_write_register(IS31FL3218_REG_CONTROL + i, g_led_control_registers[i]);
+ }
+
+ g_led_control_registers_update_required = false;
+ }
+}