diff options
Diffstat (limited to 'drivers/led/issi/is31fl3733.c')
| -rw-r--r-- | drivers/led/issi/is31fl3733.c | 35 |
1 files changed, 14 insertions, 21 deletions
diff --git a/drivers/led/issi/is31fl3733.c b/drivers/led/issi/is31fl3733.c index 5857a800d7..0f263d949d 100644 --- a/drivers/led/issi/is31fl3733.c +++ b/drivers/led/issi/is31fl3733.c @@ -66,7 +66,7 @@ uint8_t g_twi_transfer_buffer[20]; // These buffers match the IS31FL3733 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 is31fl3733_write_pwm_buffer() but it's @@ -96,8 +96,13 @@ bool is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data) { return true; } +void is31fl3733_select_page(uint8_t addr, uint8_t page) { + is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC); + is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, page); +} + bool is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { - // Assumes PG1 is already selected. + // Assumes page 1 is already selected. // If any of the transactions fails function returns false. // Transmit PWM registers in 12 transfers of 16 bytes. // g_twi_transfer_buffer[] is 20 bytes @@ -162,32 +167,23 @@ void is31fl3733_init(uint8_t addr, uint8_t sync) { // then disable software shutdown. // Sync is passed so set it according to the datasheet. - // Unlock the command register. - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC); + is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL); - // Select PG0 - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, IS31FL3733_COMMAND_LED_CONTROL); // Turn off all LEDs. for (int i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) { is31fl3733_write_register(addr, i, 0x00); } - // Unlock the command register. - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC); + is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM); - // Select PG1 - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, IS31FL3733_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 < IS31FL3733_PWM_REGISTER_COUNT; i++) { is31fl3733_write_register(addr, i, 0x00); } - // Unlock the command register. - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC); + is31fl3733_select_page(addr, IS31FL3733_COMMAND_FUNCTION); - // Select PG3 - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, IS31FL3733_COMMAND_FUNCTION); // Set de-ghost pull-up resistors (SWx) is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_SW_PULLUP, IS31FL3733_SW_PULLUP); // Set de-ghost pull-down resistors (CSx) @@ -254,11 +250,9 @@ void is31fl3733_set_led_control_register(uint8_t index, bool red, bool green, bo void is31fl3733_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. - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC); - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, IS31FL3733_COMMAND_PWM); + is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM); - // If any of the transactions fail we risk writing dirty PG0, + // If any of the transactions fail we risk writing dirty page 0, // refresh page 0 just in case. if (!is31fl3733_write_pwm_buffer(addr, g_pwm_buffer[index])) { g_led_control_registers_update_required[index] = true; @@ -269,9 +263,8 @@ void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index) { void is31fl3733_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 - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC); - is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, IS31FL3733_COMMAND_LED_CONTROL); + is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL); + for (int i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) { is31fl3733_write_register(addr, i, g_led_control_registers[index][i]); } |