flipperzero-firmware/lib/drivers/lp5562.c

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#include "lp5562.h"
#include "lp5562_reg.h"
#include <furi_hal.h>
#include <stdio.h>
void lp5562_reset(FuriHalI2cBusHandle* handle) {
Reg0D_Reset reg = {.value = 0xFF};
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x0D, *(uint8_t*)&reg, LP5562_I2C_TIMEOUT);
}
void lp5562_configure(FuriHalI2cBusHandle* handle) {
Reg08_Config config = {.INT_CLK_EN = true, .PS_EN = true, .PWM_HF = true};
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x08, *(uint8_t*)&config, LP5562_I2C_TIMEOUT);
Reg70_LedMap map = {
.red = EngSelectI2C,
.green = EngSelectI2C,
.blue = EngSelectI2C,
.white = EngSelectI2C,
};
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x70, *(uint8_t*)&map, LP5562_I2C_TIMEOUT);
}
void lp5562_enable(FuriHalI2cBusHandle* handle) {
Reg00_Enable reg = {.CHIP_EN = true, .LOG_EN = true};
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x00, *(uint8_t*)&reg, LP5562_I2C_TIMEOUT);
//>488μs delay is required after writing to 0x00 register, otherwise program engine will not work
furi_hal_delay_us(500);
}
void lp5562_set_channel_current(FuriHalI2cBusHandle* handle, LP5562Channel channel, uint8_t value) {
uint8_t reg_no;
if(channel == LP5562ChannelRed) {
reg_no = LP5562_CHANNEL_RED_CURRENT_REGISTER;
} else if(channel == LP5562ChannelGreen) {
reg_no = LP5562_CHANNEL_GREEN_CURRENT_REGISTER;
} else if(channel == LP5562ChannelBlue) {
reg_no = LP5562_CHANNEL_BLUE_CURRENT_REGISTER;
} else if(channel == LP5562ChannelWhite) {
reg_no = LP5562_CHANNEL_WHITE_CURRENT_REGISTER;
} else {
return;
}
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, reg_no, value, LP5562_I2C_TIMEOUT);
}
void lp5562_set_channel_value(FuriHalI2cBusHandle* handle, LP5562Channel channel, uint8_t value) {
uint8_t reg_no;
if(channel == LP5562ChannelRed) {
reg_no = LP5562_CHANNEL_RED_VALUE_REGISTER;
} else if(channel == LP5562ChannelGreen) {
reg_no = LP5562_CHANNEL_GREEN_VALUE_REGISTER;
} else if(channel == LP5562ChannelBlue) {
reg_no = LP5562_CHANNEL_BLUE_VALUE_REGISTER;
} else if(channel == LP5562ChannelWhite) {
reg_no = LP5562_CHANNEL_WHITE_VALUE_REGISTER;
} else {
return;
}
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, reg_no, value, LP5562_I2C_TIMEOUT);
}
uint8_t lp5562_get_channel_value(FuriHalI2cBusHandle* handle, LP5562Channel channel) {
uint8_t reg_no;
uint8_t value;
if(channel == LP5562ChannelRed) {
reg_no = LP5562_CHANNEL_RED_VALUE_REGISTER;
} else if(channel == LP5562ChannelGreen) {
reg_no = LP5562_CHANNEL_GREEN_VALUE_REGISTER;
} else if(channel == LP5562ChannelBlue) {
reg_no = LP5562_CHANNEL_BLUE_VALUE_REGISTER;
} else if(channel == LP5562ChannelWhite) {
reg_no = LP5562_CHANNEL_WHITE_VALUE_REGISTER;
} else {
return 0;
}
furi_hal_i2c_read_reg_8(handle, LP5562_ADDRESS, reg_no, &value, LP5562_I2C_TIMEOUT);
return value;
}
static void
lp5562_set_channel_src(FuriHalI2cBusHandle* handle, LP5562Channel channel, LP5562Engine src) {
uint8_t reg_val = 0;
uint8_t bit_offset = 0;
if(channel == LP5562ChannelRed) {
bit_offset = 4;
} else if(channel == LP5562ChannelGreen) {
bit_offset = 2;
} else if(channel == LP5562ChannelBlue) {
bit_offset = 0;
} else if(channel == LP5562ChannelWhite) {
bit_offset = 6;
} else {
return;
}
furi_hal_i2c_read_reg_8(handle, LP5562_ADDRESS, 0x70, &reg_val, LP5562_I2C_TIMEOUT);
reg_val &= ~(0x3 << bit_offset);
reg_val |= ((src & 0x03) << bit_offset);
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x70, reg_val, LP5562_I2C_TIMEOUT);
}
void lp5562_execute_program(
FuriHalI2cBusHandle* handle,
LP5562Engine eng,
LP5562Channel ch,
uint16_t* program) {
if((eng < LP5562Engine1) || (eng > LP5562Engine3)) return;
uint8_t reg_val = 0;
uint8_t bit_offset = 0;
uint8_t enable_reg = 0;
// Read old value of enable register
furi_hal_i2c_read_reg_8(handle, LP5562_ADDRESS, 0x00, &enable_reg, LP5562_I2C_TIMEOUT);
// Engine configuration
bit_offset = (3 - eng) * 2;
furi_hal_i2c_read_reg_8(handle, LP5562_ADDRESS, 0x01, &reg_val, LP5562_I2C_TIMEOUT);
reg_val &= ~(0x3 << bit_offset);
reg_val |= (0x01 << bit_offset); // load
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x01, reg_val, LP5562_I2C_TIMEOUT);
furi_hal_delay_us(100);
// Program load
for(uint8_t i = 0; i < 16; i++) {
// Program words are big-endian, so reverse byte order before loading
program[i] = __REV16(program[i]);
}
furi_hal_i2c_write_mem(
handle,
LP5562_ADDRESS,
0x10 + (0x20 * (eng - 1)),
(uint8_t*)program,
16 * 2,
LP5562_I2C_TIMEOUT);
// Program start
bit_offset = (3 - eng) * 2;
furi_hal_i2c_read_reg_8(handle, LP5562_ADDRESS, 0x01, &reg_val, LP5562_I2C_TIMEOUT);
reg_val &= ~(0x3 << bit_offset);
reg_val |= (0x02 << bit_offset); // run
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x01, reg_val, LP5562_I2C_TIMEOUT);
// Switch output to Execution Engine
lp5562_set_channel_src(handle, ch, eng);
enable_reg &= ~(0x3 << bit_offset);
enable_reg |= (0x02 << bit_offset); // run
furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x00, enable_reg, LP5562_I2C_TIMEOUT);
}
void lp5562_execute_ramp(
FuriHalI2cBusHandle* handle,
LP5562Engine eng,
LP5562Channel ch,
uint8_t val_start,
uint8_t val_end,
uint16_t time) {
if(val_start == val_end) return;
// Temporary switch to constant value from register
lp5562_set_channel_src(handle, ch, LP5562Direct);
// Prepare command sequence
uint16_t program[16];
uint8_t diff = (val_end > val_start) ? (val_end - val_start) : (val_start - val_end);
uint16_t time_step = time * 2 / diff;
uint8_t prescaller = 0;
if(time_step > 0x3F) {
time_step /= 32;
prescaller = 1;
}
if(time_step == 0) {
time_step = 1;
} else if(time_step > 0x3F)
time_step = 0x3F;
program[0] = 0x4000 | val_start; // Set PWM
if(val_end > val_start) {
program[1] = (prescaller << 14) | (time_step << 8) | ((diff / 2) & 0x7F); // Ramp Up
} else {
program[1] = (prescaller << 14) | (time_step << 8) | 0x80 |
((diff / 2) & 0x7F); // Ramp Down
}
program[2] = 0xA001 | ((2 - 1) << 7); // Loop to step 1, repeat twice to get full 8-bit scale
program[3] = 0xC000; // End
// Execute program
lp5562_execute_program(handle, eng, LP5562ChannelWhite, program);
// Write end value to register
lp5562_set_channel_value(handle, ch, val_end);
}