flipperzero-firmware/bootloader/targets/f7/furi-hal/furi-hal-i2c.c
SG 8073992925
[FL-1587] RFID: Clock for emulation timer from antenna (#622)
* RFID: pull antenna down when emulating
* Rfid: fixed HID emulation by adding zero pulse every 4 bits
* Rfid: HID emulation fixed with DSP based FSK oscillator.
* Rfid: receive 125KHz clock for emulation timer from antenna and comparator
* Rfid: commented unused variable
* Firmware: rollback changes in f6.
* Add F7 target based on F6.
* F7/F6: update cube projects, apply changes to the targets, update linker scripts with correct RAM start values.
* FuriHal: RFID init routine.
* Scripts: update OTP tool for v11 board

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
2021-09-10 05:19:02 +03:00

138 lines
3.5 KiB
C

#include <furi-hal-i2c.h>
#include <stm32wbxx_ll_bus.h>
#include <stm32wbxx_ll_i2c.h>
#include <stm32wbxx_ll_rcc.h>
#include <stm32wbxx_ll_gpio.h>
#include <stm32wbxx_ll_cortex.h>
void furi_hal_i2c_init() {
LL_I2C_InitTypeDef I2C_InitStruct = {0};
LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
LL_RCC_SetI2CClockSource(LL_RCC_I2C1_CLKSOURCE_PCLK1);
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
GPIO_InitStruct.Pin = POWER_I2C_SCL_Pin | POWER_I2C_SDA_Pin;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = LL_GPIO_AF_4;
LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C1);
I2C_InitStruct.PeripheralMode = LL_I2C_MODE_I2C;
I2C_InitStruct.Timing = POWER_I2C_TIMINGS;
I2C_InitStruct.AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
I2C_InitStruct.DigitalFilter = 0;
I2C_InitStruct.OwnAddress1 = 0;
I2C_InitStruct.TypeAcknowledge = LL_I2C_ACK;
I2C_InitStruct.OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
LL_I2C_Init(I2C1, &I2C_InitStruct);
LL_I2C_EnableAutoEndMode(I2C1);
LL_I2C_SetOwnAddress2(I2C1, 0, LL_I2C_OWNADDRESS2_NOMASK);
LL_I2C_DisableOwnAddress2(I2C1);
LL_I2C_DisableGeneralCall(I2C1);
LL_I2C_EnableClockStretching(I2C1);
}
bool furi_hal_i2c_tx(
I2C_TypeDef* instance,
uint8_t address,
const uint8_t* data,
uint8_t size,
uint32_t timeout) {
uint32_t time_left = timeout;
bool ret = true;
while(LL_I2C_IsActiveFlag_BUSY(instance))
;
LL_I2C_HandleTransfer(
instance,
address,
LL_I2C_ADDRSLAVE_7BIT,
size,
LL_I2C_MODE_AUTOEND,
LL_I2C_GENERATE_START_WRITE);
while(!LL_I2C_IsActiveFlag_STOP(instance) || size > 0) {
if(LL_I2C_IsActiveFlag_TXIS(instance)) {
LL_I2C_TransmitData8(instance, (*data));
data++;
size--;
time_left = timeout;
}
if(LL_SYSTICK_IsActiveCounterFlag()) {
if(--time_left == 0) {
ret = false;
break;
}
}
}
LL_I2C_ClearFlag_STOP(instance);
return ret;
}
bool furi_hal_i2c_rx(
I2C_TypeDef* instance,
uint8_t address,
uint8_t* data,
uint8_t size,
uint32_t timeout) {
uint32_t time_left = timeout;
bool ret = true;
while(LL_I2C_IsActiveFlag_BUSY(instance))
;
LL_I2C_HandleTransfer(
instance,
address,
LL_I2C_ADDRSLAVE_7BIT,
size,
LL_I2C_MODE_AUTOEND,
LL_I2C_GENERATE_START_READ);
while(!LL_I2C_IsActiveFlag_STOP(instance) || size > 0) {
if(LL_I2C_IsActiveFlag_RXNE(instance)) {
*data = LL_I2C_ReceiveData8(instance);
data++;
size--;
time_left = timeout;
}
if(LL_SYSTICK_IsActiveCounterFlag()) {
if(--time_left == 0) {
ret = false;
break;
}
}
}
LL_I2C_ClearFlag_STOP(instance);
return ret;
}
bool furi_hal_i2c_trx(
I2C_TypeDef* instance,
uint8_t address,
const uint8_t* tx_data,
uint8_t tx_size,
uint8_t* rx_data,
uint8_t rx_size,
uint32_t timeout) {
if(furi_hal_i2c_tx(instance, address, tx_data, tx_size, timeout) &&
furi_hal_i2c_rx(instance, address, rx_data, rx_size, timeout)) {
return true;
} else {
return false;
}
}