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/*
* This file is part of the libopencm3_cpp_extensions project.
* hosted at http://github.com/thirdpin/libopencm3_cpp_extensions
*
* Copyright (C) 2016 Third Pin LLC
* Written by Anastasiia Lazareva <a.lazareva@thirdpin.ru>
* Written by Maxim Ambrosevich
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
SPI C++ Wrapper of libopencm3 library for STM32F2, STM32F4
*/
#include "spi.hpp"
namespace cm3cpp {
namespace spi {
Spi::Spi(Config spi_conf)
{
switch (spi_conf.spi_number) {
case 1:
_spi = SPI1;
_irq = Interrupt::ISR_SPI1;
break;
case 2:
_spi = SPI2;
_irq = Interrupt::ISR_SPI2;
break;
case 3:
_spi = SPI3;
_irq = Interrupt::ISR_SPI3;
break;
default:
break;
}
Gpio mosi(spi_conf.mosi_pin);
mosi.mode_setup(Gpio::Mode::ALTERNATE_FUNCTION, Gpio::PullMode::NO_PULL);
mosi.set_output_options(Gpio::OutputType::PUSH_PULL,
Gpio::Speed::HIGH_SPEED_100MHz);
Gpio miso(spi_conf.miso_pin);
miso.mode_setup(Gpio::Mode::ALTERNATE_FUNCTION, Gpio::PullMode::NO_PULL);
miso.set_output_options(Gpio::OutputType::PUSH_PULL,
Gpio::Speed::HIGH_SPEED_100MHz);
Gpio scl(spi_conf.scl_pin);
scl.mode_setup(Gpio::Mode::ALTERNATE_FUNCTION, Gpio::PullMode::NO_PULL);
scl.set_output_options(Gpio::OutputType::PUSH_PULL,
Gpio::Speed::HIGH_SPEED_100MHz);
switch (_spi) {
case SPI1:
case SPI2:
mosi.set_af(Gpio::AltFuncNumber::AF5);
miso.set_af(Gpio::AltFuncNumber::AF5);
scl.set_af(Gpio::AltFuncNumber::AF5);
break;
case SPI3:
mosi.set_af(Gpio::AltFuncNumber::AF6);
miso.set_af(Gpio::AltFuncNumber::AF6);
scl.set_af(Gpio::AltFuncNumber::AF6);
break;
default:
break;
}
}
void Spi::set_next_tx_from(NextTx next)
{
switch (next) {
case NEXT_TX_FROM_BUFFER:
spi_set_next_tx_from_buffer(_spi);
break;
case NEXT_TX_FROM_CRC:
spi_set_next_tx_from_crc(_spi);
break;
}
}
void Spi::set_data_drame_format(DataFrameFormat dff)
{
switch (dff) {
case DFF_8BIT:
spi_set_dff_8bit(_spi);
break;
case DFF_16BIT:
spi_set_dff_16bit(_spi);
break;
}
}
void Spi::set_software_slave_management(State state)
{
switch (state) {
case DISABLE:
spi_disable_software_slave_management(_spi);
break;
case ENABLE:
spi_enable_software_slave_management(_spi);
break;
}
}
void Spi::set_nss(NssState nss)
{
switch (nss) {
case LOW:
spi_set_nss_low(_spi);
break;
case HIGH:
spi_set_nss_high(_spi);
break;
}
}
void Spi::set_bit_position(BitPos pos)
{
switch (pos) {
case MSB_FIRST:
spi_send_msb_first(_spi);
break;
case LSB_FIRST:
spi_send_lsb_first(_spi);
break;
}
}
void Spi::set_clock_polarity(Polarity polarity)
{
switch (polarity) {
case POLARITY_LOW:
spi_set_clock_polarity_0(_spi);
break;
case POLARITY_HIGH:
spi_set_clock_polarity_1(_spi);
break;
}
}
void Spi::set_clock_phase(Phase phase)
{
switch (phase) {
case PHASE_LOW:
spi_set_clock_phase_0(_spi);
break;
case PHASE_HIGH:
spi_set_clock_phase_1(_spi);
break;
}
}
bool Spi::get_flag_status(Flag flag) const
{
const uint32_t reg_sr = SPI_SR(_spi);
const uint32_t flag_state = reg_sr & static_cast<uint32_t>(flag);
return flag == static_cast<Flag>(flag_state);
}
inline void Spi::enable_nvic()
{
nvic_enable_irq(static_cast<uint8_t>(_irq));
}
} // namespace spi
} // namespace cm3cpp
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