e78e8d7c3f
Add STM32WL-specific sx126x_set_tx_params function based on the STM32CubeWL modifications to LoRaMac-node. Add the "power-amplifier-output" DT property to "st,stm32wl-subghz-radio" for selecting between the RFO_LP and RFO_HP output configurations provided by the above mentioned function. Add the "rfo-lp-max-power" and "rfo-hp-max-power" DT properties for defining the maximum design power of the respective outputs' matching networks. closes #48511 Signed-off-by: Kenneth J. Miller <ken@miller.ec>
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/*
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* Copyright (c) 2021 Fabio Baltieri
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include "sx126x_common.h"
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#include <stm32wlxx_ll_exti.h>
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#include <stm32wlxx_ll_pwr.h>
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#include <stm32wlxx_ll_rcc.h>
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#include <zephyr/logging/log.h>
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#include <zephyr/irq.h>
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LOG_MODULE_DECLARE(sx126x, CONFIG_LORA_LOG_LEVEL);
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static const enum {
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RFO_LP,
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RFO_HP,
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} pa_output = DT_INST_STRING_UPPER_TOKEN(0, power_amplifier_output);
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void sx126x_reset(struct sx126x_data *dev_data)
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{
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LL_RCC_RF_EnableReset();
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k_sleep(K_MSEC(20));
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LL_RCC_RF_DisableReset();
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k_sleep(K_MSEC(10));
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}
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bool sx126x_is_busy(struct sx126x_data *dev_data)
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{
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return LL_PWR_IsActiveFlag_RFBUSYS();
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}
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uint32_t sx126x_get_dio1_pin_state(struct sx126x_data *dev_data)
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{
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return 0;
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}
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void sx126x_dio1_irq_enable(struct sx126x_data *dev_data)
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{
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NVIC_ClearPendingIRQ(DT_INST_IRQN(0));
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irq_enable(DT_INST_IRQN(0));
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}
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void sx126x_dio1_irq_disable(struct sx126x_data *dev_data)
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{
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irq_disable(DT_INST_IRQN(0));
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}
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void sx126x_set_tx_params(int8_t power, RadioRampTimes_t ramp_time)
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{
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uint8_t buf[2];
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if (pa_output == RFO_LP) {
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const int8_t max_power = DT_INST_PROP(0, rfo_lp_max_power);
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if (power > max_power) {
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power = max_power;
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}
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if (max_power == 15) {
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SX126xSetPaConfig(0x07, 0x00, 0x01, 0x01);
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power = 14 - (max_power - power);
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} else if (max_power == 10) {
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SX126xSetPaConfig(0x01, 0x00, 0x01, 0x01);
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power = 13 - (max_power - power);
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} else { /* default +14 dBm */
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SX126xSetPaConfig(0x04, 0x00, 0x01, 0x01);
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power = 14 - (max_power - power);
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}
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if (power < -17) {
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power = -17;
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}
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/* PA overcurrent protection limit 60 mA */
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SX126xWriteRegister(REG_OCP, 0x18);
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} else { /* RFO_HP */
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/* Better Resistance of the RFO High Power Tx to Antenna
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* Mismatch, see STM32WL Erratasheet
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*/
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SX126xWriteRegister(REG_TX_CLAMP_CFG,
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SX126xReadRegister(REG_TX_CLAMP_CFG)
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| (0x0F << 1));
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const int8_t max_power = DT_INST_PROP(0, rfo_hp_max_power);
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if (power > max_power) {
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power = max_power;
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}
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if (max_power == 20) {
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SX126xSetPaConfig(0x03, 0x05, 0x00, 0x01);
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power = 22 - (max_power - power);
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} else if (max_power == 17) {
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SX126xSetPaConfig(0x02, 0x03, 0x00, 0x01);
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power = 22 - (max_power - power);
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} else if (max_power == 14) {
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SX126xSetPaConfig(0x02, 0x02, 0x00, 0x01);
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power = 14 - (max_power - power);
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} else { /* default +22 dBm */
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SX126xSetPaConfig(0x04, 0x07, 0x00, 0x01);
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power = 22 - (max_power - power);
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}
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if (power < -9) {
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power = -9;
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}
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/* PA overcurrent protection limit 140 mA */
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SX126xWriteRegister(REG_OCP, 0x38);
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}
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buf[0] = power;
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buf[1] = (uint8_t)ramp_time;
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SX126xWriteCommand(RADIO_SET_TXPARAMS, buf, 2);
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}
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static void radio_isr(const struct device *dev)
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{
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struct sx126x_data *dev_data = dev->data;
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irq_disable(DT_INST_IRQN(0));
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k_work_submit(&dev_data->dio1_irq_work);
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}
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int sx126x_variant_init(const struct device *dev)
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{
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IRQ_CONNECT(DT_INST_IRQN(0),
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DT_INST_IRQ(0, priority),
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radio_isr, DEVICE_DT_INST_GET(0), 0);
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LL_EXTI_EnableIT_32_63(LL_EXTI_LINE_44);
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irq_enable(DT_INST_IRQN(0));
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return 0;
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}
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