flipperzero-firmware/lib/drivers/bq25896.c

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C
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#include "bq25896.h"
#include "bq25896_reg.h"
#include <api-hal-i2c.h>
#include <stddef.h>
uint8_t bit_reverse(uint8_t b) {
b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
return b;
}
bool bq25896_read(uint8_t address, uint8_t* data, size_t size) {
bool ret;
with_api_hal_i2c(
bool, &ret, () {
return api_hal_i2c_trx(
POWER_I2C, BQ25896_ADDRESS, &address, 1, data, size, BQ25896_I2C_TIMEOUT);
});
return ret;
}
bool bq25896_read_reg(uint8_t address, uint8_t* data) {
bq25896_read(address, data, 1);
return true;
}
bool bq25896_write_reg(uint8_t address, uint8_t* data) {
uint8_t buffer[2] = {address, *data};
bool ret;
with_api_hal_i2c(
bool, &ret, () {
return api_hal_i2c_tx(POWER_I2C, BQ25896_ADDRESS, buffer, 2, BQ25896_I2C_TIMEOUT);
});
return ret;
}
typedef struct {
REG00 r00;
REG01 r01;
REG02 r02;
REG03 r03;
REG04 r04;
REG05 r05;
REG06 r06;
REG07 r07;
REG08 r08;
REG09 r09;
REG0A r0A;
REG0B r0B;
REG0C r0C;
REG0D r0D;
REG0E r0E;
REG0F r0F;
REG10 r10;
REG11 r11;
REG12 r12;
REG13 r13;
REG14 r14;
} bq25896_regs_t;
static bq25896_regs_t bq25896_regs;
void bq25896_init() {
bq25896_regs.r14.REG_RST = 1;
bq25896_write_reg(0x14, (uint8_t*)&bq25896_regs.r14);
// Readout all registers
bq25896_read(0x00, (uint8_t*)&bq25896_regs, sizeof(bq25896_regs));
// Poll ADC forever
bq25896_regs.r02.CONV_START = 1;
bq25896_regs.r02.CONV_RATE = 1;
bq25896_write_reg(0x02, (uint8_t*)&bq25896_regs.r02);
bq25896_regs.r07.WATCHDOG = WatchdogDisable;
bq25896_write_reg(0x07, (uint8_t*)&bq25896_regs.r07);
bq25896_read(0x00, (uint8_t*)&bq25896_regs, sizeof(bq25896_regs));
}
void bq25896_poweroff() {
bq25896_regs.r09.BATFET_DIS = 1;
bq25896_write_reg(0x09, (uint8_t*)&bq25896_regs.r09);
}
bool bq25896_is_charging() {
bq25896_read(0x00, (uint8_t*)&bq25896_regs, sizeof(bq25896_regs));
bq25896_read_reg(0x0B, (uint8_t*)&bq25896_regs.r0B);
return bq25896_regs.r0B.CHRG_STAT != ChrgStatNo;
}
void bq25896_enable_otg() {
bq25896_regs.r03.OTG_CONFIG = 1;
bq25896_write_reg(0x03, (uint8_t*)&bq25896_regs.r03);
}
void bq25896_disable_otg() {
bq25896_regs.r03.OTG_CONFIG = 0;
bq25896_write_reg(0x03, (uint8_t*)&bq25896_regs.r03);
}
uint16_t bq25896_get_vbus_voltage() {
bq25896_read_reg(0x11, (uint8_t*)&bq25896_regs.r11);
if(bq25896_regs.r11.VBUS_GD) {
return (uint16_t)bq25896_regs.r11.VBUSV * 100 + 2600;
} else {
return 0;
}
}
uint16_t bq25896_get_vsys_voltage() {
bq25896_read_reg(0x0F, (uint8_t*)&bq25896_regs.r0F);
return (uint16_t)bq25896_regs.r0F.SYSV * 20 + 2304;
}
uint16_t bq25896_get_vbat_voltage() {
bq25896_read_reg(0x0E, (uint8_t*)&bq25896_regs.r0E);
return (uint16_t)bq25896_regs.r0E.BATV * 20 + 2304;
}
uint16_t bq25896_get_vbat_current() {
bq25896_read_reg(0x12, (uint8_t*)&bq25896_regs.r12);
return (uint16_t)bq25896_regs.r12.ICHGR * 50;
}
uint32_t bq25896_get_ntc_mpct() {
bq25896_read_reg(0x10, (uint8_t*)&bq25896_regs.r10);
return (uint32_t)bq25896_regs.r10.TSPCT * 465 + 21000;
}