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add pcnt.rst

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This commit is contained in:
Wangjialin 2016-11-23 19:07:30 +08:00
parent 6db1482cd5
commit a97e076dec
3 changed files with 31 additions and 0 deletions
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1
components/driver/include/driver/periph_ctrl.h
View File

@ -40,6 +40,7 @@ typedef enum {
PERIPH_UHCI0_MODULE, PERIPH_UHCI0_MODULE,
PERIPH_UHCI1_MODULE, PERIPH_UHCI1_MODULE,
PERIPH_RMT_MODULE, PERIPH_RMT_MODULE,
PERIPH_PCNT_MODULE,
} periph_module_t; } periph_module_t;
/** /**

8
components/driver/periph_ctrl.c
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@ -107,6 +107,10 @@ void periph_module_disable(periph_module_t periph)
{ {
portENTER_CRITICAL(&periph_spinlock); portENTER_CRITICAL(&periph_spinlock);
switch(periph) { switch(periph) {
case PERIPH_RMT_MODULE:
CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_RMT_CLK_EN);
SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_RMT_RST);
break;
case PERIPH_LEDC_MODULE: case PERIPH_LEDC_MODULE:
CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_LEDC_CLK_EN); CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_LEDC_CLK_EN);
SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_LEDC_RST); SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_LEDC_RST);
@ -171,6 +175,10 @@ void periph_module_disable(periph_module_t periph)
CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_UHCI1_CLK_EN); CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_UHCI1_CLK_EN);
SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_UHCI1_RST); SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_UHCI1_RST);
break; break;
case PERIPH_PCNT_MODULE:
CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_PCNT_CLK_EN);
SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_PCNT_RST);
break;
default: default:
break; break;
} }

22
docs/api/pcnt.rst
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@ -1,3 +1,25 @@
PCNT
========
Overview
--------
The PCNT (Pulse Counter) module is designed to count the number of rising and/or falling edges of an input signal. Each pulse counter unit has a 16-bit signed counter register and two channels that can be configured to either increment or decrement the counter. Each channel has a signal input that accepts signal edges to be detected, as well as a control input that can be used to enable or disable the signal input. The inputs have optional filters that can be used to discard unwanted glitches in the signal.
Application Example
-------------------
PCNT counter with control signal and event interrupt example: `examples/12_pcnt <https://github.com/espressif/esp-idf/tree/master/examples/12_pcnt>`_.
API Reference
-------------
Header Files
^^^^^^^^^^^^
* `driver/pcnt.h <https://github.com/espressif/esp-idf/blob/master/components/driver/include/driver/pcnt.h>`_
Macros Macros
^^^^^^ ^^^^^^