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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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29
pio/ir_nec/nec_receive_library/nec_receive.c
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@@ -4,56 +4,40 @@
* 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()
// declare the public API functions
//
#include "nec_receive.h"
// import the assembled PIO state machine program
//
#include "nec_receive.pio.h"
// define the public API functions
//
// Claim an unused state machine on the specified PIO and configure it
// to receive NEC IR frames on the given GPIO pin.
//
// Returns: the state machine number on success, otherwise -1
//
int nec_rx_init(PIO pio, uint pin_num) {
// disable pull-up and pull-down on gpio pin
//
gpio_disable_pulls (pin_num);
gpio_disable_pulls(pin_num);
// install the program in the PIO shared instruction space
//
uint offset;
if (pio_can_add_program (pio, &nec_receive_program)) {
offset = pio_add_program (pio, &nec_receive_program);
if (pio_can_add_program(pio, &nec_receive_program)) {
offset = pio_add_program(pio, &nec_receive_program);
} else {
return -1; // the program could not be added
}
// claim an unused state machine on this PIO
//
int sm = pio_claim_unused_sm (pio, true);
int sm = pio_claim_unused_sm(pio, true);
if (sm == -1) {
return -1; // we were unable to claim a state machine
}
// configure and enable the state machine
//
nec_receive_program_init(pio, sm, offset, pin_num);
return sm;
@@ -64,8 +48,7 @@ int nec_rx_init(PIO pio, uint pin_num) {
// provided.
//
// Returns: `true` if the frame was valid, otherwise `false`
//
bool nec_decode_frame (uint32_t frame, uint8_t *p_address, uint8_t *p_data) {
bool nec_decode_frame(uint32_t frame, uint8_t *p_address, uint8_t *p_data) {
// access the frame data as four 8-bit fields
//
@@ -83,14 +66,12 @@ bool nec_decode_frame (uint32_t frame, uint8_t *p_address, uint8_t *p_data) {
// a valid (non-extended) 'NEC' frame should contain 8 bit
// address, inverted address, data and inverted data
//
if (f.address != (f.inverted_address ^ 0xff) ||
f.data != (f.inverted_data ^ 0xff)) {
return false;
}
// store the validated address and data
//
*p_address = f.address;
*p_data = f.data;