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Update of BT power up sequences to remove redundant delay (500ms) in BT_POWER operation during HCIDrive initialization. 

Current BT_POWER sequence:
1. BT_POWER=0  ( from CyH4TransportDriver::initialize)
2. delay 1ms   ( from CyH4TransportDriver::initialize)
3. BT_POWER=1  ( from CyH4TransportDriver::initialize)
4. delay 500ms (from HCIDriver::do_initialize)
5. BT_POWER=1  (from HCIDriver::do_initialize)
6. delay 500ms (from HCIDriver::do_initialize)

updates:
1. remove 4) and 5)
2. keep all BT_POWER operations in one place. The best logic place is CyH4TransportDriver::initialize.

So finally the BT_POWER sequences should looks like:
1. BT_POWER=0  ( from CyH4TransportDriver::initialize)
2. delay 1ms   ( from CyH4TransportDriver::initialize)
3. BT_POWER=1  ( from CyH4TransportDriver::initialize)
4. delay 500ms ( from CyH4TransportDriver::initialize)
pull/14988/head
nazar.palamar 2021-08-05 16:13:58 +03:00
parent df00ed4efe
commit c2f7a9539b
2 changed files with 16 additions and 4 deletions
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17
connectivity/drivers/ble/FEATURE_BLE/COMPONENT_CYW43XXX/CyH4TransportDriver.cpp
View File

@ -29,6 +29,17 @@
#include "rtos/ThisThread.h"
#include <chrono>
// BT settling time after power on
#if !defined (CY_BT_POWER_ON_SETTLING_TIME)
#define CY_BT_POWER_ON_SETTLING_TIME (500ms)
#endif /* !defined (CY_BT_POWER_ON_SETTLING_TIME) */
// Power on reset time
#if !defined (CY_BT_POWER_ON_RESET_TIME)
#define CY_BT_POWER_ON_RESET_TIME (1ms)
#endif /* !defined (CY_BT_POWER_ON_RESET_TIME) */
namespace ble {
namespace vendor {
namespace cypress_ble {
@ -153,8 +164,9 @@ void CyH4TransportDriver::initialize()
bt_host_wake_active = true;
sleep_manager_lock_deep_sleep();
// Keep the bt_power line in the low level to ensure that the device resets.
bt_power = 0;
rtos::ThisThread::sleep_for(1ms);
rtos::ThisThread::sleep_for(CY_BT_POWER_ON_RESET_TIME);
#if defined(CYW43XXX_UNBUFFERED_UART)
uart.baud(DEF_BT_BAUD_RATE);
@ -186,7 +198,9 @@ void CyH4TransportDriver::initialize()
cyhal_uart_enable_event(&uart, CYHAL_UART_IRQ_RX_NOT_EMPTY, CYHAL_ISR_PRIORITY_DEFAULT, true);
#endif
// Power up BT
bt_power = 1;
rtos::ThisThread::sleep_for(CY_BT_POWER_ON_SETTLING_TIME);
#if (defined(MBED_TICKLESS) && DEVICE_SLEEP && DEVICE_LPTICKER)
if (bt_host_wake_name != NC) {
@ -229,6 +243,7 @@ void CyH4TransportDriver::terminate()
deassert_bt_dev_wake();
// Power down BT
bt_power = 0; //BT_POWER is an output, should not be freed only set inactive
#if defined(CYW43XXX_UNBUFFERED_UART)

3
connectivity/drivers/ble/FEATURE_BLE/COMPONENT_CYW43XXX/HCIDriver.cpp
View File

@ -101,9 +101,6 @@ public:
virtual void do_initialize()
{
rtos::ThisThread::sleep_for(500ms);
bt_power = 1;
rtos::ThisThread::sleep_for(500ms);
}
virtual void do_terminate() { }