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Cleanup 3rd party samples; update README.md; add some missing copyright, fix builds for boards without certain pin definitions

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This commit is contained in:
Graham Sanderson
2021-10-28 14:56:05 -05:00
committed by GitHub
parent 1300621684
commit fa09f2c88e
16 changed files with 111 additions and 117 deletions
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27
pio/ir_nec/nec_transmit_library/nec_transmit.c
View File

@@ -10,48 +10,34 @@
#include "pico/stdlib.h"
#include "hardware/pio.h"
#include "hardware/clocks.h" // for clock_get_hz()
// declare the public API functions
//
#include "nec_transmit.h"
// import the assembled PIO state machine programs
//
#include "nec_carrier_burst.pio.h"
#include "nec_carrier_control.pio.h"
// define the public API functions
//
// 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)) {
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,
@@ -59,27 +45,24 @@ int nec_tx_init(PIO pio, uint 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)) {
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-6), // 2 ticks per 562.5us carrier burst
2 * (1 / 562.5e-6f), // 2 ticks per 562.5us carrier burst
32); // 32 bits per frame
return carrier_control_sm;
@@ -89,9 +72,7 @@ int nec_tx_init(PIO pio, uint pin_num) {
// 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) {
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;
}

10
pio/ir_nec/nec_transmit_library/nec_transmit.h
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@@ -1,7 +1,13 @@
/**
* Copyright (c) 2021 mjcross
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "pico/stdlib.h"
#include "hardware/pio.h"
// public API
//
int nec_tx_init(PIO pio, uint pin);
uint32_t nec_encode_frame (uint8_t address, uint8_t data);
uint32_t nec_encode_frame(uint8_t address, uint8_t data);