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Commit61a1680

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authored
Add support for setting the channel input filter (#2136)
* Add support for setting the channel input filter* Format with astyle* Start enum from 0 so we can directly convert enum to filter value
1 parent1ee0a03 commit61a1680

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2 files changed

+25
-6
lines changed

2 files changed

+25
-6
lines changed

‎cores/arduino/HardwareTimer.h‎

Lines changed: 21 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -90,6 +90,25 @@ typedef enum {
9090
PERCENT_COMPARE_FORMAT,// used for Dutycycle
9191
} TimerCompareFormat_t;
9292

93+
typedefenum {
94+
FILTER_NONE =0,// No filter
95+
FILTER_CKINT_N2,// Sampling rate is same as clock interrupt, n=2 events
96+
FILTER_CKINT_N4,// Sampling rate is same as clock interrupt, n=4 events
97+
FILTER_CKINT_N8,// Sampling rate is same as clock interrupt, n=8 events
98+
FILTER_DTS2_N6,// Sampling rate is DTS/2, n=6 events
99+
FILTER_DTS2_N8,// Sampling rate is DTS/2, n=8 events
100+
FILTER_DTS4_N6,// Sampling rate is DTS/4, n=6 events
101+
FILTER_DTS4_N8,// Sampling rate is DTS/4, n=8 events
102+
FILTER_DTS8_N6,// Sampling rate is DTS/8, n=6 events
103+
FILTER_DTS8_N8,// Sampling rate is DTS/8, n=8 events
104+
FILTER_DTS16_N5,// Sampling rate is DTS/16, n=5 events
105+
FILTER_DTS16_N6,// Sampling rate is DTS/16, n=6 events
106+
FILTER_DTS16_N8,// Sampling rate is DTS/16, n=8 events
107+
FILTER_DTS32_N5,// Sampling rate is DTS/32, n=5 events
108+
FILTER_DTS32_N6,// Sampling rate is DTS/32, n=6 events
109+
FILTER_DTS32_N8,// Sampling rate is DTS/32, n=8 events
110+
} ChannelInputFilter_t;
111+
93112
#ifdef __cplusplus
94113

95114
#include<functional>
@@ -121,8 +140,8 @@ class HardwareTimer {
121140
voidsetCount(uint32_t val, TimerFormat_t format = TICK_FORMAT);// set timer counter to value 'val' depending on format provided
122141
uint32_tgetCount(TimerFormat_t format = TICK_FORMAT);// return current counter value of timer depending on format provided
123142

124-
voidsetMode(uint32_t channel, TimerModes_t mode, PinName pin = NC);// Configure timer channel with specified mode on specified pin if available
125-
voidsetMode(uint32_t channel, TimerModes_t mode,uint32_t pin);
143+
voidsetMode(uint32_t channel, TimerModes_t mode, PinName pin = NC, ChannelInputFilter_t filter = FILTER_NONE);// Configure timer channel with specified mode on specified pin if available
144+
voidsetMode(uint32_t channel, TimerModes_t mode,uint32_t pin, ChannelInputFilter_t filter = FILTER_NONE);
126145

127146
TimerModes_tgetMode(uint32_t channel);// Retrieve configured mode
128147

‎libraries/SrcWrapper/src/HardwareTimer.cpp‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -619,9 +619,9 @@ void HardwareTimer::setCount(uint32_t counter, TimerFormat_t format)
619619
* @param pin: Arduino pin number, ex: D1, 1 or PA1
620620
* @retval None
621621
*/
622-
voidHardwareTimer::setMode(uint32_t channel, TimerModes_t mode,uint32_t pin)
622+
voidHardwareTimer::setMode(uint32_t channel, TimerModes_t mode,uint32_t pin, ChannelInputFilter_t filter)
623623
{
624-
setMode(channel, mode,digitalPinToPinName(pin));
624+
setMode(channel, mode,digitalPinToPinName(pin), filter);
625625
}
626626

627627
/**
@@ -631,7 +631,7 @@ void HardwareTimer::setMode(uint32_t channel, TimerModes_t mode, uint32_t pin)
631631
* @param pin: pin name, ex: PB_0
632632
* @retval None
633633
*/
634-
voidHardwareTimer::setMode(uint32_t channel, TimerModes_t mode, PinName pin)
634+
voidHardwareTimer::setMode(uint32_t channel, TimerModes_t mode, PinName pin, ChannelInputFilter_t filter)
635635
{
636636
int timChannel =getChannel(channel);
637637
int timAssociatedInputChannel;
@@ -659,7 +659,7 @@ void HardwareTimer::setMode(uint32_t channel, TimerModes_t mode, PinName pin)
659659
channelIC.ICPolarity = TIM_ICPOLARITY_RISING;
660660
channelIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
661661
channelIC.ICPrescaler = TIM_ICPSC_DIV1;
662-
channelIC.ICFilter =0;
662+
channelIC.ICFilter =filter;
663663

664664
switch (mode) {
665665
case TIMER_DISABLED:

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