diff options
Diffstat (limited to 'drivers/led/issi/is31fl3742a-mono.c')
| -rw-r--r-- | drivers/led/issi/is31fl3742a-mono.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/drivers/led/issi/is31fl3742a-mono.c b/drivers/led/issi/is31fl3742a-mono.c new file mode 100644 index 0000000000..7d9095429d --- /dev/null +++ b/drivers/led/issi/is31fl3742a-mono.c @@ -0,0 +1,206 @@ +#include "is31fl3742a-mono.h" +#include <string.h> +#include "i2c_master.h" +#include "wait.h" + +#define IS31FL3742A_PWM_REGISTER_COUNT 180 +#define IS31FL3742A_SCALING_REGISTER_COUNT 180 + +#ifndef IS31FL3742A_I2C_TIMEOUT +# define IS31FL3742A_I2C_TIMEOUT 100 +#endif + +#ifndef IS31FL3742A_I2C_PERSISTENCE +# define IS31FL3742A_I2C_PERSISTENCE 0 +#endif + +#ifndef IS31FL3742A_CONFIGURATION +# define IS31FL3742A_CONFIGURATION 0x31 +#endif + +#ifndef IS31FL3742A_PWM_FREQUENCY +# define IS31FL3742A_PWM_FREQUENCY IS31FL3742A_PWM_FREQUENCY_29K_HZ +#endif + +#ifndef IS31FL3742A_SW_PULLDOWN +# define IS31FL3742A_SW_PULLDOWN IS31FL3742A_PDR_8K_OHM +#endif + +#ifndef IS31FL3742A_CS_PULLUP +# define IS31FL3742A_CS_PULLUP IS31FL3742A_PUR_8K_OHM +#endif + +#ifndef IS31FL3742A_GLOBAL_CURRENT +# define IS31FL3742A_GLOBAL_CURRENT 0xFF +#endif + +uint8_t i2c_transfer_buffer[20] = {0xFF}; + +uint8_t g_pwm_buffer[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_PWM_REGISTER_COUNT]; +bool g_pwm_buffer_update_required[IS31FL3742A_DRIVER_COUNT] = {false}; +bool g_scaling_registers_update_required[IS31FL3742A_DRIVER_COUNT] = {false}; + +uint8_t g_scaling_registers[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_SCALING_REGISTER_COUNT]; + +void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data) { + i2c_transfer_buffer[0] = reg; + i2c_transfer_buffer[1] = data; + +#if IS31FL3742A_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) { + if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3742A_I2C_TIMEOUT) == 0) break; + } +#else + i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3742A_I2C_TIMEOUT); +#endif +} + +void is31fl3742a_select_page(uint8_t addr, uint8_t page) { + is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND_WRITE_LOCK, IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC); + is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND, page); +} + +void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { + // Assumes page 0 is already selected. + // If any of the transactions fails function returns false. + // Transmit PWM registers in 12 transfers of 16 bytes. + // i2c_transfer_buffer[] is 20 bytes + + // Iterate over the pwm_buffer contents at 16 byte intervals. + for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 16) { + i2c_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(i2c_transfer_buffer + 1, pwm_buffer + i, 16); + +#if IS31FL3742A_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) { + if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT) != 0) break; + } +#else + i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT); +#endif + } +} + +void is31fl3742a_init_drivers(void) { + i2c_init(); + + is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_1); +#if defined(IS31FL3742A_I2C_ADDRESS_2) + is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_2); +# if defined(IS31FL3742A_I2C_ADDRESS_3) + is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_3); +# if defined(IS31FL3742A_I2C_ADDRESS_4) + is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_4); +# endif +# endif +#endif + + for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) { + is31fl3742a_set_scaling_register(i, 0xFF); + } + + is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_1, 0); +#if defined(IS31FL3742A_I2C_ADDRESS_2) + is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_2, 1); +# if defined(IS31FL3742A_I2C_ADDRESS_3) + is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_3, 2); +# if defined(IS31FL3742A_I2C_ADDRESS_4) + is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_4, 3); +# endif +# endif +#endif +} + +void is31fl3742a_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. + + is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING); + + // Turn off all LEDs. + for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) { + is31fl3742a_write_register(addr, i, 0x00); + } + + is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM); + + for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i++) { + is31fl3742a_write_register(addr, i, 0x00); + } + + is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_FUNCTION); + + is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PULLDOWNUP, (IS31FL3742A_SW_PULLDOWN << 4) | IS31FL3742A_CS_PULLUP); + is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3742A_GLOBAL_CURRENT); + is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3742A_PWM_FREQUENCY & 0b0111)); + is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_CONFIGURATION, IS31FL3742A_CONFIGURATION); + + // Wait 10ms to ensure the device has woken up. + wait_ms(10); +} + +void is31fl3742a_set_value(int index, uint8_t value) { + is31fl3742a_led_t led; + if (index >= 0 && index < IS31FL3742A_LED_COUNT) { + memcpy_P(&led, (&g_is31fl3742a_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 is31fl3742a_set_value_all(uint8_t value) { + for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) { + is31fl3742a_set_value(i, value); + } +} + +void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value) { + is31fl3742a_led_t led; + memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led)); + + g_scaling_registers[led.driver][led.v] = value; + + g_scaling_registers_update_required[led.driver] = true; +} + +void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index) { + if (g_pwm_buffer_update_required[index]) { + is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM); + + is31fl3742a_write_pwm_buffer(addr, g_pwm_buffer[index]); + g_pwm_buffer_update_required[index] = false; + } +} + +void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) { + if (g_scaling_registers_update_required[index]) { + is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING); + + for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) { + is31fl3742a_write_register(addr, i, g_scaling_registers[index][i]); + } + g_scaling_registers_update_required[index] = false; + } +} + +void is31fl3742a_flush(void) { + is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_1, 0); +#if defined(IS31FL3742A_I2C_ADDRESS_2) + is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_2, 1); +# if defined(IS31FL3742A_I2C_ADDRESS_3) + is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_3, 2); +# if defined(IS31FL3742A_I2C_ADDRESS_4) + is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_4, 3); +# endif +# endif +#endif +} |