101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
/*
|
|
* I2C.cpp
|
|
*
|
|
* Created on: Aug 5, 2023
|
|
* Author: Carst
|
|
*/
|
|
#include <stm32g0xx_ll_bus.h>
|
|
#include <stm32g0xx_ll_gpio.h>
|
|
#include <stm32g0xx_ll_i2c.h>
|
|
#include "I2C.hpp"
|
|
|
|
namespace ElektronischeLast
|
|
{
|
|
|
|
iI2C::iI2C(std::uint8_t device_address)
|
|
{
|
|
this->device_address = device_address;
|
|
|
|
LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOA);
|
|
/**I2C2 GPIO Configuration
|
|
PA11 [PA9] ------> I2C2_SCL
|
|
PA12 [PA10] ------> I2C2_SDA
|
|
*/
|
|
LL_GPIO_InitTypeDef GPIO_InitStruct =
|
|
{
|
|
.Pin = LL_GPIO_PIN_11,
|
|
.Mode = LL_GPIO_MODE_ALTERNATE,
|
|
.Speed = LL_GPIO_SPEED_FREQ_LOW,
|
|
.OutputType = LL_GPIO_OUTPUT_OPENDRAIN,
|
|
.Pull = LL_GPIO_PULL_NO,
|
|
.Alternate = LL_GPIO_AF_6,
|
|
};
|
|
LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
|
|
|
|
GPIO_InitStruct.Pin = LL_GPIO_PIN_12;
|
|
LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
|
|
|
|
/** I2C Initialization
|
|
*/
|
|
LL_I2C_InitTypeDef I2C_InitStruct =
|
|
{
|
|
.PeripheralMode = LL_I2C_MODE_I2C,
|
|
.Timing = 0x10707DBCUL,
|
|
.AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE,
|
|
.DigitalFilter = 0UL,
|
|
.OwnAddress1 = 0UL,
|
|
.TypeAcknowledge = LL_I2C_ACK,
|
|
.OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT,
|
|
};
|
|
LL_I2C_Init(I2C2, &I2C_InitStruct);
|
|
LL_I2C_EnableAutoEndMode(I2C2);
|
|
LL_I2C_SetOwnAddress2(I2C2, 0, LL_I2C_OWNADDRESS2_NOMASK);
|
|
LL_I2C_DisableOwnAddress2(I2C2);
|
|
LL_I2C_DisableGeneralCall(I2C2);
|
|
LL_I2C_EnableClockStretching(I2C2);
|
|
LL_I2C_SetMasterAddressingMode(I2C2, LL_I2C_ADDRESSING_MODE_7BIT);
|
|
|
|
LL_I2C_Enable(I2C2);
|
|
}
|
|
iI2C::~iI2C(void)
|
|
{
|
|
|
|
}
|
|
bool iI2C::read(std::uint32_t address, std::uint32_t length, std::uint8_t buffer[])
|
|
{
|
|
std::uint32_t transfered = 0UL;
|
|
LL_I2C_SetSlaveAddr(I2C2, this->device_address + ((address >= 256U) ? 2U : 0U));
|
|
LL_I2C_SetTransferRequest(I2C2, LL_I2C_REQUEST_WRITE);
|
|
LL_I2C_SetTransferSize(I2C2, 1U);
|
|
LL_I2C_DisableAutoEndMode(I2C2);
|
|
LL_I2C_GenerateStartCondition(I2C2);
|
|
while(!LL_I2C_IsActiveFlag_TXIS(I2C2))
|
|
{
|
|
if(LL_I2C_IsActiveFlag_NACK(I2C2))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
LL_I2C_TransmitData8(I2C2, address & 0xFFU);
|
|
while(!LL_I2C_IsActiveFlag_TC(I2C2));
|
|
|
|
LL_I2C_SetTransferRequest(I2C2, LL_I2C_REQUEST_READ);
|
|
LL_I2C_SetTransferSize(I2C2, length);
|
|
LL_I2C_EnableAutoEndMode(I2C2);
|
|
LL_I2C_GenerateStartCondition(I2C2);
|
|
while(transfered < length)
|
|
{
|
|
if(LL_I2C_IsActiveFlag_RXNE(I2C2))
|
|
{
|
|
buffer[transfered++] = LL_I2C_ReceiveData8(I2C2);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
bool iI2C::write(std::uint32_t address, std::uint32_t length, std::uint8_t buffer[])
|
|
{
|
|
return true;
|
|
}
|
|
}
|