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_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.

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