adapter_gpio.cpp File Reference

Adapters to treat M5HAL and RMT in the same way. More...

#include "adapter_gpio.hpp"
#include <driver/gpio.h>
#include <esp_idf_version.h>
#include <esp_adc/adc_oneshot.h>
#include <esp_timer.h>

Namespaces
namespace	m5
	Top level namespace of M5stack.

Functions
uint8_t	m5::unit::gpio::calculate_rmt_clk_div (const uint32_t apb_freq_hz, const uint32_t tick_ns)
	Calculate clk_div from desired tick time (nanoseconds)
uint32_t	m5::unit::gpio::calculate_rmt_resolution_hz (const uint32_t apb_freq_hz, const uint32_t tick_ns)
	Calculate resolution from desired tick time.

Variables
constexpr auto	M5_ADC_ATTEN_DB = ADC_ATTEN_DB_12

Detailed Description

Adapters to treat M5HAL and RMT in the same way.

Note

Currently handles GPIO directly, but will handle via M5HAL in the future

Function Documentation

calculate_rmt_clk_div()

uint8_t m5::unit::gpio::calculate_rmt_clk_div	(	const uint32_t	apb_freq_hz,
		const uint32_t	tick_ns )

Calculate clk_div from desired tick time (nanoseconds)

Parameters

apb_freq_hz	Current APB clock (Hz)
tick_ns	Desired tick time (ns)

Returns

clk_div for RMT v1

calculate_rmt_resolution_hz()

uint32_t m5::unit::gpio::calculate_rmt_resolution_hz	(	const uint32_t	apb_freq_hz,
		const uint32_t	tick_ns )

Calculate resolution from desired tick time.

Parameters

apb_freq_hz	Current APB clock (Hz)
tick_ns	Desired tick time (ns)

Returns

resoution for RMT v2