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nimble/ll: Add option to define maximum allowed TX power

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This allows to limit (clip) maximum allowed TX power to meet
requirements for selected LE PHY power class.
This commit is contained in:
Szymon Janc
2022-10-04 21:35:38 +02:00
parent 7b5bbb6ec0
commit 266e81d2d3
4 changed files with 20 additions and 5 deletions
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nimble/controller/src/ble_ll.c
+4 -2
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@@ -1376,7 +1376,8 @@ ble_ll_task(void *arg)
ble_phy_init();
/* Set output power to default */
g_ble_ll_tx_power = ble_ll_tx_power_round(MYNEWT_VAL(BLE_LL_TX_PWR_DBM));
g_ble_ll_tx_power = ble_ll_tx_power_round(min(MYNEWT_VAL(BLE_LL_TX_PWR_DBM),
MYNEWT_VAL(BLE_LL_TX_PWR_MAX_DBM)));
ble_ll_tx_power_set(g_ble_ll_tx_power);
/* Tell the host that we are ready to receive packets */
@@ -1623,7 +1624,8 @@ ble_ll_reset(void)
g_ble_ll_rx_power_compensation = 0;
/* Set output power to default */
g_ble_ll_tx_power = ble_ll_tx_power_round(MYNEWT_VAL(BLE_LL_TX_PWR_DBM));
g_ble_ll_tx_power = ble_ll_tx_power_round(min(MYNEWT_VAL(BLE_LL_TX_PWR_DBM),
MYNEWT_VAL(BLE_LL_TX_PWR_MAX_DBM)));
ble_ll_tx_power_set(g_ble_ll_tx_power);
/* FLush all packets from Link layer queues */
nimble/controller/src/ble_ll_adv.c
+2 -1
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@@ -3528,7 +3528,8 @@ ble_ll_adv_ext_set_param(const uint8_t *cmdbuf, uint8_t len,
/* no preference */
advsm->tx_power = ble_ll_tx_power_round(g_ble_ll_tx_power - g_ble_ll_tx_power_compensation);
} else {
advsm->tx_power = ble_ll_tx_power_round(cmd->tx_power - g_ble_ll_tx_power_compensation);
advsm->tx_power = ble_ll_tx_power_round(min(cmd->tx_power, MYNEWT_VAL(BLE_LL_TX_PWR_MAX_DBM)) -
g_ble_ll_tx_power_compensation);
}
/* we can always store as those are validated and used only when needed */
nimble/controller/src/ble_ll_hci_vs.c
+6 -2
View File
@@ -124,9 +124,13 @@ ble_ll_hci_vs_set_tx_power(uint16_t ocf, const uint8_t *cmdbuf, uint8_t cmdlen,
if (cmd->tx_power == 127) {
/* restore reset default */
g_ble_ll_tx_power = ble_ll_tx_power_round(MYNEWT_VAL(BLE_LL_TX_PWR_DBM) - g_ble_ll_tx_power_compensation);
g_ble_ll_tx_power = ble_ll_tx_power_round(min(MYNEWT_VAL(BLE_LL_TX_PWR_DBM),
MYNEWT_VAL(BLE_LL_TX_PWR_MAX_DBM)) -
g_ble_ll_tx_power_compensation);
} else {
g_ble_ll_tx_power = ble_ll_tx_power_round(cmd->tx_power - g_ble_ll_tx_power_compensation);
g_ble_ll_tx_power = ble_ll_tx_power_round(min(cmd->tx_power,
MYNEWT_VAL(BLE_LL_TX_PWR_MAX_DBM)) -
g_ble_ll_tx_power_compensation);
}
ble_ll_tx_power_set(g_ble_ll_tx_power);
nimble/controller/syscfg.yml
+8
View File
@@ -69,6 +69,14 @@ syscfg.defs:
may be rounded up or down depending on used radio.
value: '0'
BLE_LL_TX_PWR_MAX_DBM:
description: >
Maximum allowed transmit power level (in dBm). This limits maximum
power to specified value (including FEM and/or host compensation).
Useful for ensuring selected power class of device. Defaults to
maximum allowed by specification (Power Class 1).
value: '20'
BLE_LL_NUM_COMP_PKT_ITVL_MS:
description: >
Determines the interval at which the controller will send the