Mirror/betaflight
1
0
Fork 0
mirror of https://github.com/betaflight/betaflight.git synced 2025-07-17 21:35:44 +03:00
Code Issues Wiki Activity

Add support for 2 softserial ports on PWM4+5/TIM3_CH1+2/PA6+PA7 and

Browse source 
PWM6+7/TIM3_CH3+4/PB0+PB1

Update software serial to monitor serial pins for signal changes instead
of periodically sampling pin signals.

When reading the data the timer used is syncronized to the falling edge
of the start bit which allows for better syncronisation at higher
speeds.  The code has been tested OK from 1200 baud to 19200.  38400
baud was tested and partially usable but has been disabled because there
are too many transmit and receive errors, especially when transmitting
and receiving at the same time.

Due to the way a single timer is used for transmitting and receiving, if
data comes in while transmitting the system may incorrectly transmit a
short or long bit.  However at 19200 and below this didn't cause a
problem in the limited testing I performed.
This commit is contained in:
Dominic Clifton 2014-04-03 13:24:52 +01:00
parent bd809bca1b
commit c7de7d2ebc
9 changed files with 212 additions and 138 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/drv_timer.c
View file

@ -134,7 +134,7 @@ void configureTimerCaptureCompareInterrupt(const timerHardware_t *timerHardwareP
configureTimerInputCaptureCompareChannel(timerHardwarePtr->tim, timerHardwarePtr->channel);
}
void timerNVICConfig(uint8_t irq)
void timerNVICConfigure(uint8_t irq)
{
NVIC_InitTypeDef NVIC_InitStructure;
@ -162,11 +162,11 @@ void configTimeBase(TIM_TypeDef *tim, uint16_t period, uint8_t mhz)
TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
}
void timerInConfig(const timerHardware_t *timerHardwarePtr, uint16_t period, uint8_t mhz)
void timerConfigure(const timerHardware_t *timerHardwarePtr, uint16_t period, uint8_t mhz)
{
configTimeBase(timerHardwarePtr->tim, period, mhz);
TIM_Cmd(timerHardwarePtr->tim, ENABLE);
timerNVICConfig(timerHardwarePtr->irq);
timerNVICConfigure(timerHardwarePtr->irq);
}