diff options
Diffstat (limited to 'drivers/led/issi/is31fl3736.c')
| -rw-r--r-- | drivers/led/issi/is31fl3736.c | 204 |
1 files changed, 96 insertions, 108 deletions
diff --git a/drivers/led/issi/is31fl3736.c b/drivers/led/issi/is31fl3736.c index 30ab796f3e..3ab42e2f7c 100644 --- a/drivers/led/issi/is31fl3736.c +++ b/drivers/led/issi/is31fl3736.c @@ -16,8 +16,8 @@ */ #include "is31fl3736.h" -#include <string.h> #include "i2c_master.h" +#include "gpio.h" #include "wait.h" #define IS31FL3736_PWM_REGISTER_COUNT 192 // actually 96 @@ -47,54 +47,66 @@ # define IS31FL3736_GLOBAL_CURRENT 0xFF #endif -// Transfer buffer for TWITransmitData() -uint8_t g_twi_transfer_buffer[20]; +const uint8_t i2c_addresses[IS31FL3736_DRIVER_COUNT] = { + IS31FL3736_I2C_ADDRESS_1, +#ifdef IS31FL3736_I2C_ADDRESS_2 + IS31FL3736_I2C_ADDRESS_2, +# ifdef IS31FL3736_I2C_ADDRESS_3 + IS31FL3736_I2C_ADDRESS_3, +# ifdef IS31FL3736_I2C_ADDRESS_4 + IS31FL3736_I2C_ADDRESS_4, +# endif +# endif +#endif +}; // These buffers match the IS31FL3736 PWM registers. -// The control buffers match the PG0 LED On/Off registers. +// The control buffers match the page 0 LED On/Off registers. // Storing them like this is optimal for I2C transfers to the registers. // We could optimize this and take out the unused registers from these // buffers and the transfers in is31fl3736_write_pwm_buffer() but it's // probably not worth the extra complexity. -uint8_t g_pwm_buffer[IS31FL3736_DRIVER_COUNT][IS31FL3736_PWM_REGISTER_COUNT]; -bool g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false}; - -uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0}; -bool g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT] = {false}; - -void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data) { - g_twi_transfer_buffer[0] = reg; - g_twi_transfer_buffer[1] = data; - +typedef struct is31fl3736_driver_t { + uint8_t pwm_buffer[IS31FL3736_PWM_REGISTER_COUNT]; + bool pwm_buffer_dirty; + uint8_t led_control_buffer[IS31FL3736_LED_CONTROL_REGISTER_COUNT]; + bool led_control_buffer_dirty; +} PACKED is31fl3736_driver_t; + +is31fl3736_driver_t driver_buffers[IS31FL3736_DRIVER_COUNT] = {{ + .pwm_buffer = {0}, + .pwm_buffer_dirty = false, + .led_control_buffer = {0}, + .led_control_buffer_dirty = false, +}}; + +void is31fl3736_write_register(uint8_t index, uint8_t reg, uint8_t data) { #if IS31FL3736_I2C_PERSISTENCE > 0 for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) { - if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT) == 0) break; + if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; } #else - i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT); + i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT); #endif } -void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { - // assumes PG1 is already selected - - // transmit PWM registers in 12 transfers of 16 bytes - // g_twi_transfer_buffer[] is 20 bytes +void is31fl3736_select_page(uint8_t index, uint8_t page) { + is31fl3736_write_register(index, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC); + is31fl3736_write_register(index, IS31FL3736_REG_COMMAND, page); +} - // iterate over the pwm_buffer contents at 16 byte intervals - for (int i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) { - g_twi_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(g_twi_transfer_buffer + 1, pwm_buffer + i, 16); +void is31fl3736_write_pwm_buffer(uint8_t index) { + // Assumes page 1 is already selected. + // Transmit PWM registers in 12 transfers of 16 bytes. + // Iterate over the pwm_buffer contents at 16 byte intervals. + for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) { #if IS31FL3736_I2C_PERSISTENCE > 0 - for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) { - if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT) == 0) break; + for (uint8_t j = 0; j < IS31FL3736_I2C_PERSISTENCE; j++) { + if (i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; } #else - i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT); + i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3736_I2C_TIMEOUT); #endif } } @@ -102,73 +114,55 @@ void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { void is31fl3736_init_drivers(void) { i2c_init(); - is31fl3736_init(IS31FL3736_I2C_ADDRESS_1); -#if defined(IS31FL3736_I2C_ADDRESS_2) - is31fl3736_init(IS31FL3736_I2C_ADDRESS_2); -# if defined(IS31FL3736_I2C_ADDRESS_3) - is31fl3736_init(IS31FL3736_I2C_ADDRESS_3); -# if defined(IS31FL3736_I2C_ADDRESS_4) - is31fl3736_init(IS31FL3736_I2C_ADDRESS_4); -# endif -# endif +#if defined(IS31FL3736_SDB_PIN) + gpio_set_pin_output(IS31FL3736_SDB_PIN); + gpio_write_pin_high(IS31FL3736_SDB_PIN); #endif + for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) { + is31fl3736_init(i); + } + for (int i = 0; i < IS31FL3736_LED_COUNT; i++) { is31fl3736_set_led_control_register(i, true, true, true); } - is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_1, 0); -#if defined(IS31FL3736_I2C_ADDRESS_2) - is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_2, 1); -# if defined(IS31FL3736_I2C_ADDRESS_3) - is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_3, 2); -# if defined(IS31FL3736_I2C_ADDRESS_4) - is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_4, 3); -# endif -# endif -#endif + for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) { + is31fl3736_update_led_control_registers(i); + } } -void is31fl3736_init(uint8_t addr) { +void is31fl3736_init(uint8_t index) { // 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. - // Unlock the command register. - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC); + is31fl3736_select_page(index, IS31FL3736_COMMAND_LED_CONTROL); - // Select PG0 - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_REG_LED_CONTROL); // Turn off all LEDs. - for (int i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) { - is31fl3736_write_register(addr, i, 0x00); + for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) { + is31fl3736_write_register(index, i, 0x00); } - // Unlock the command register. - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITELOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC); + is31fl3736_select_page(index, IS31FL3736_COMMAND_PWM); - // Select PG1 - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_PWM); // Set PWM on all LEDs to 0 // No need to setup Breath registers to PWM as that is the default. - for (int i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i++) { - is31fl3736_write_register(addr, i, 0x00); + for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i++) { + is31fl3736_write_register(index, i, 0x00); } - // Unlock the command register. - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC); + is31fl3736_select_page(index, IS31FL3736_COMMAND_FUNCTION); - // Select PG3 - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_FUNCTION); // Set de-ghost pull-up resistors (SWx) - is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP); + is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP); // Set de-ghost pull-down resistors (CSx) - is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN); + is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN); // Set global current to maximum. - is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT); + is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT); // Disable software shutdown. - is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01); + is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01); // Wait 10ms to ensure the device has woken up. wait_ms(10); @@ -176,16 +170,18 @@ void is31fl3736_init(uint8_t addr) { void is31fl3736_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) { is31fl3736_led_t led; + if (index >= 0 && index < IS31FL3736_LED_COUNT) { memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led)); - if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) { + if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) { return; } - 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; + + driver_buffers[led.driver].pwm_buffer[led.r] = red; + driver_buffers[led.driver].pwm_buffer[led.g] = green; + driver_buffers[led.driver].pwm_buffer[led.b] = blue; + driver_buffers[led.driver].pwm_buffer_dirty = true; } } @@ -214,56 +210,48 @@ void is31fl3736_set_led_control_register(uint8_t index, bool red, bool green, bo uint8_t bit_b = led.b % 8; if (red) { - g_led_control_registers[led.driver][control_register_r] |= (1 << bit_r); + driver_buffers[led.driver].led_control_buffer[control_register_r] |= (1 << bit_r); } else { - g_led_control_registers[led.driver][control_register_r] &= ~(1 << bit_r); + driver_buffers[led.driver].led_control_buffer[control_register_r] &= ~(1 << bit_r); } if (green) { - g_led_control_registers[led.driver][control_register_g] |= (1 << bit_g); + driver_buffers[led.driver].led_control_buffer[control_register_g] |= (1 << bit_g); } else { - g_led_control_registers[led.driver][control_register_g] &= ~(1 << bit_g); + driver_buffers[led.driver].led_control_buffer[control_register_g] &= ~(1 << bit_g); } if (blue) { - g_led_control_registers[led.driver][control_register_b] |= (1 << bit_b); + driver_buffers[led.driver].led_control_buffer[control_register_b] |= (1 << bit_b); } else { - g_led_control_registers[led.driver][control_register_b] &= ~(1 << bit_b); + driver_buffers[led.driver].led_control_buffer[control_register_b] &= ~(1 << bit_b); } - g_led_control_registers_update_required[led.driver] = true; + driver_buffers[led.driver].led_control_buffer_dirty = true; } -void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index) { - if (g_pwm_buffer_update_required[index]) { - // Firstly we need to unlock the command register and select PG1 - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC); - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_PWM); +void is31fl3736_update_pwm_buffers(uint8_t index) { + if (driver_buffers[index].pwm_buffer_dirty) { + is31fl3736_select_page(index, IS31FL3736_COMMAND_PWM); + + is31fl3736_write_pwm_buffer(index); - is31fl3736_write_pwm_buffer(addr, g_pwm_buffer[index]); - g_pwm_buffer_update_required[index] = false; + driver_buffers[index].pwm_buffer_dirty = false; } } -void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) { - if (g_led_control_registers_update_required[index]) { - // Firstly we need to unlock the command register and select PG0 - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC); - is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, IS31FL3736_COMMAND_LED_CONTROL); - for (int i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) { - is31fl3736_write_register(addr, i, g_led_control_registers[index][i]); +void is31fl3736_update_led_control_registers(uint8_t index) { + if (driver_buffers[index].led_control_buffer_dirty) { + is31fl3736_select_page(index, IS31FL3736_COMMAND_LED_CONTROL); + + for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) { + is31fl3736_write_register(index, i, driver_buffers[index].led_control_buffer[i]); } - g_led_control_registers_update_required[index] = false; + + driver_buffers[index].led_control_buffer_dirty = false; } } void is31fl3736_flush(void) { - is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_1, 0); -#if defined(IS31FL3736_I2C_ADDRESS_2) - is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_2, 1); -# if defined(IS31FL3736_I2C_ADDRESS_3) - is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_3, 2); -# if defined(IS31FL3736_I2C_ADDRESS_4) - is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_4, 3); -# endif -# endif -#endif + for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) { + is31fl3736_update_pwm_buffers(i); + } } |