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drivers: bluetooth: hci: spi: Handle when the buffer is empty

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Check if the buffer size is not empty before spi transceive and buffer's
data processing. This fixes the need to slow down MCUs to 16MHz when
using BlueNRG-MS chips.
Tested samples : Beacon, Central, Peripheral

Signed-off-by: Yaël Boutreux <yael.boutreux@st.com>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
This commit is contained in:
Yaël Boutreux 2019-07-03 12:34:13 +02:00 • committed by Anas Nashif
commit 3704e8b8b4
1 changed files with 6 additions and 5 deletions
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11
drivers/bluetooth/hci/spi.c
View file

@ -326,9 +326,8 @@ static void bt_spi_rx_thread(void)
header_slave[STATUS_HEADER_TOREAD] == 0xFF) &&
!ret)) && exit_irq_high_loop());
if (!ret) {
size = header_slave[STATUS_HEADER_TOREAD];
size = header_slave[STATUS_HEADER_TOREAD];
if (!ret || size != 0) {
do {
ret = bt_spi_transceive(&txmsg, size,
&rxmsg, size);
@ -339,8 +338,10 @@ static void bt_spi_rx_thread(void)
gpio_pin_enable_callback(irq_dev, GPIO_IRQ_PIN);
k_sem_give(&sem_busy);
if (ret) {
BT_ERR("Error %d", ret);
if (ret || size == 0) {
if (ret) {
BT_ERR("Error %d", ret);
}
continue;
}