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Updates along with SDK1.3.0 release (#181)

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Bug fixes and new examples

Co-authored-by: Paulo Marques <pm@quant-insight.com>
Co-authored-by: martin <admin@crossleys.biz>
Co-authored-by: matiasilva <matias.silva@raspberrypi.com>
Co-authored-by: Uri Shaked <uri@urishaked.com>
Co-authored-by: Diego Solano <diegosolano@gmail.com>
Co-authored-by: Andrew Scheller <andrew.scheller@raspberrypi.com>
Co-authored-by: Adrian Hesketh <a-h@users.noreply.github.com>
Co-authored-by: Emircan Gündoğdu <58917386+emircangun@users.noreply.github.com>
Co-authored-by: Josef Wegner <80200012+josefwegner@users.noreply.github.com>
Co-authored-by: pmarques-dev <72901351+pmarques-dev@users.noreply.github.com>
Co-authored-by: Paulo Marques <pm@quant-insight.com>
Co-authored-by: mjcross <mjcross@users.noreply.github.com>
Co-authored-by: martin <admin@crossleys.biz>
This commit is contained in:
Graham Sanderson
2021-11-01 14:41:54 -05:00
committed by GitHub
parent 146680d625
commit f800a7e303
150 changed files with 4832 additions and 98 deletions
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78
pio/ir_nec/nec_transmit_library/nec_transmit.c Normal file
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/**
* Copyright (c) 2021 mjcross
*
* SPDX-License-Identifier: BSD-3-Clause
*/
// SDK types and declarations
//
#include "pico/stdlib.h"
#include "hardware/pio.h"
#include "hardware/clocks.h" // for clock_get_hz()
#include "nec_transmit.h"
// import the assembled PIO state machine programs
#include "nec_carrier_burst.pio.h"
#include "nec_carrier_control.pio.h"
// Claim an unused state machine on the specified PIO and configure it
// to transmit NEC IR frames on the specificied GPIO pin.
//
// Returns: on success, the number of the carrier_control state machine
// otherwise -1
int nec_tx_init(PIO pio, uint pin_num) {
// install the carrier_burst program in the PIO shared instruction space
uint carrier_burst_offset;
if (pio_can_add_program(pio, &nec_carrier_burst_program)) {
carrier_burst_offset = pio_add_program(pio, &nec_carrier_burst_program);
} else {
return -1;
}
// claim an unused state machine on this PIO
int carrier_burst_sm = pio_claim_unused_sm(pio, true);
if (carrier_burst_sm == -1) {
return -1;
}
// configure and enable the state machine
nec_carrier_burst_program_init(pio,
carrier_burst_sm,
carrier_burst_offset,
pin_num,
38.222e3); // 38.222 kHz carrier
// install the carrier_control program in the PIO shared instruction space
uint carrier_control_offset;
if (pio_can_add_program(pio, &nec_carrier_control_program)) {
carrier_control_offset = pio_add_program(pio, &nec_carrier_control_program);
} else {
return -1;
}
// claim an unused state machine on this PIO
int carrier_control_sm = pio_claim_unused_sm(pio, true);
if (carrier_control_sm == -1) {
return -1;
}
// configure and enable the state machine
nec_carrier_control_program_init(pio,
carrier_control_sm,
carrier_control_offset,
2 * (1 / 562.5e-6f), // 2 ticks per 562.5us carrier burst
32); // 32 bits per frame
return carrier_control_sm;
}
// Create a frame in `NEC` format from the provided 8-bit address and data
//
// Returns: a 32-bit encoded frame
uint32_t nec_encode_frame(uint8_t address, uint8_t data) {
// a normal 32-bit frame is encoded as address, inverted address, data, inverse data,
return address | (address ^ 0xff) << 8 | data << 16 | (data ^ 0xff) << 24;
}