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jLynx 2023-05-19 08:16:05 +12:00 • committed by GitHub
parent 7aca7ce74d
commit 033c4e9a5b
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599 changed files with 70746 additions and 66896 deletions
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80
firmware/application/hw/rffc507x_spi.cpp
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@ -30,80 +30,78 @@ namespace rffc507x {
namespace spi {
void SPI::init() {
gpio_rffc5072_select.set();
gpio_rffc5072_clock.clear();
gpio_rffc5072_select.set();
gpio_rffc5072_clock.clear();
gpio_rffc5072_select.output();
gpio_rffc5072_clock.output();
gpio_rffc5072_data.input();
gpio_rffc5072_select.output();
gpio_rffc5072_clock.output();
gpio_rffc5072_data.input();
gpio_rffc5072_data.clear();
gpio_rffc5072_data.clear();
}
inline void SPI::select(const bool active) {
gpio_rffc5072_select.write(!active);
gpio_rffc5072_select.write(!active);
}
inline void SPI::direction_out() {
gpio_rffc5072_data.output();
gpio_rffc5072_data.output();
}
inline void SPI::direction_in() {
gpio_rffc5072_data.input();
gpio_rffc5072_data.input();
}
inline void SPI::write_bit(const bit_t value) {
gpio_rffc5072_data.write(value);
gpio_rffc5072_data.write(value);
}
inline bit_t SPI::read_bit() {
return gpio_rffc5072_data.read() & 1;
return gpio_rffc5072_data.read() & 1;
}
inline bit_t SPI::transfer_bit(const bit_t bit_out) {
gpio_rffc5072_clock.clear();
write_bit(bit_out);
const bit_t bit_in = read_bit();
gpio_rffc5072_clock.set();
return bit_in;
gpio_rffc5072_clock.clear();
write_bit(bit_out);
const bit_t bit_in = read_bit();
gpio_rffc5072_clock.set();
return bit_in;
}
data_t SPI::transfer_bits(const data_t data_out, const size_t count) {
data_t data_in = 0;
for(size_t i=0; i<count; i++) {
data_in = (data_in << 1) | transfer_bit((data_out >> (count - i - 1)) & 1);
}
return data_in;
data_t data_in = 0;
for (size_t i = 0; i < count; i++) {
data_in = (data_in << 1) | transfer_bit((data_out >> (count - i - 1)) & 1);
}
return data_in;
}
data_t SPI::transfer_word(const Direction direction, const address_t address, const data_t data_out) {
select(true);
select(true);
const data_t address_word =
((direction == Direction::Read) ? (1 << 7) : 0)
| (address & 0x7f)
;
const data_t address_word =
((direction == Direction::Read) ? (1 << 7) : 0) | (address & 0x7f);
direction_out();
transfer_bits(address_word, 9);
direction_out();
transfer_bits(address_word, 9);
if( direction == Direction::Read ) {
direction_in();
transfer_bits(0, 2);
}
if (direction == Direction::Read) {
direction_in();
transfer_bits(0, 2);
}
const data_t data_in = transfer_bits(data_out, 16);
const data_t data_in = transfer_bits(data_out, 16);
if( direction == Direction::Write ) {
direction_in();
}
if (direction == Direction::Write) {
direction_in();
}
select(false);
select(false);
transfer_bits(0, 2);
transfer_bits(0, 2);
return data_in;
return data_in;
}
}
}
} // namespace spi
} // namespace rffc507x