kopia lustrzana https://github.com/Qyon/STM32_RTTY
53 wiersze
1.7 KiB
C
53 wiersze
1.7 KiB
C
//
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// Created by SQ5RWU on 2016-12-24.
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//
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#include "radio.h"
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uint8_t _spi_sendrecv(const uint16_t data_word) {
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GPIO_ResetBits(GPIOC, radioNSELpin);
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// wait for tx buffer
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while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);
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SPI_I2S_SendData(SPI2, data_word);
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// wait for data in rx buffer
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while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
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GPIO_SetBits(GPIOC, radioNSELpin);
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return (uint8_t) SPI_I2S_ReceiveData(SPI2);
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}
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inline uint8_t radio_rw_register(const uint8_t register_addr, uint8_t value, uint8_t write){
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return _spi_sendrecv(((write ? register_addr | WR : register_addr) << 8) | value);
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}
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void radio_set_tx_frequency(const float freq_in_mhz) {
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uint8_t hbsel = (uint8_t) ((freq_in_mhz * (30.0f / SI4032_CLOCK)) >= 480.0f ? 1 : 0);
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uint8_t fb = (uint8_t) ((((uint8_t)((freq_in_mhz * (30.0f / SI4032_CLOCK)) / 10) - 24) - (24 * hbsel)) / (1 + hbsel));
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uint8_t gen_div = 3; // constant - not possible to change!
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uint16_t fc = (uint16_t) (((freq_in_mhz / ((SI4032_CLOCK / gen_div) * (hbsel + 1))) - fb - 24) * 64000);
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radio_rw_register(0x75, (uint8_t) (0b01000000 | (fb & 0b11111) | ((hbsel & 0b1) << 5)), 1);
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radio_rw_register(0x76, (uint8_t) (((uint16_t)fc >> 8) & 0xff), 1);
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radio_rw_register(0x77, (uint8_t) ((uint16_t)fc & 0xff), 1);
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}
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void radio_disable_tx() {
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radio_rw_register(0x07, 0x40, 1);
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}
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void radio_soft_reset() {
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radio_rw_register(0x07, 0x80, 1);
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}
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void radio_enable_tx() {
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radio_rw_register(0x07, 0x48, 1);
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}
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int8_t radio_read_temperature() {
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uint8_t temp;
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temp = radio_rw_register(0x11, 0xff, 0); // read ADC
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int8_t temperatura = (int8_t) (-64 + (temp * 5 / 10) - 16);
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radio_rw_register(0x0f, 0x80, 1);
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return temperatura;
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}
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