Keuronde/Detection_2023
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Initialisation des WS2812 (Neopixel)

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This commit is contained in:
Samuel 2023-02-25 11:10:01 +01:00
parent 0a35dcd2d5
commit 52d880375e
5 changed files with 207 additions and 5 deletions
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9
CMakeLists.txt
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@ -15,17 +15,24 @@ add_executable(Detection2023
vl53l1_platform.c
VL53L1X_api.c
VL53L1X_calibration.c
ws2812.c
SelectionCapteur.c
)
# generate the header file into the source tree as it is included in the RP2040 datasheet
pico_generate_pio_header(Detection2023 ${CMAKE_CURRENT_LIST_DIR}/ws2812.pio)
target_link_libraries(Detection2023
hardware_i2c
hardware_uart
hardware_pio
pico_stdlib
)
pico_enable_stdio_usb(Detection2023 1)
pico_enable_stdio_uart(Detection2023 0)
pico_enable_stdio_uart(Detection2023 1)
pico_add_extra_outputs(Detection2023)

22
main.c
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@ -4,18 +4,25 @@
#include "VL53L1X_api.h"
#include "VL53L1X_calibration.h"
#include "SelectionCapteur.h"
#include "hardware/pio.h"
#include "ws2812.h"
#include "ws2812.pio.h"
#define I2C_SDA_PIN 0
#define I2C_SCL_PIN 1
#define TEST_TIMEOUT_US 10000000
void i2c_master_init(void);
int continuous_reading(uint8_t device);
int calibration(uint8_t device);
int change_address(uint8_t * device, uint8_t new_i2c_7bits_address);
void initialise_adresses(void);
void display_menu();
void main(void)
{
int status;
@ -27,8 +34,8 @@ void main(void)
Selection_capteur_init();
Selection_capteur_select(1);
printf("Waiting to allow user to connect USB serial\n");
sleep_ms(3000);
ws2812_init();
printf("End waiting\n");
while(1){
@ -36,9 +43,7 @@ void main(void)
display_menu();
do{
stdio_flush();
keycode = getchar_timeout_us(TEST_TIMEOUT_US);
stdio_flush();
if(!answer_at_least_once){
display_menu();
}
@ -61,12 +66,21 @@ void main(void)
answer_at_least_once=1;
while(continuous_reading(VL53L1X_device));
break;
default :
break;
}
}
}
void initialise_adresses(void){
for(uint capteur=1; capteur<=12; capteur++){
Selection_capteur_select(1);
}
}
void display_menu(){
printf("Select action :\n");
printf("A - Change I2C address\n");

91
ws2812.c Normal file
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@ -0,0 +1,91 @@
#include "pico/stdlib.h"
#include "hardware/pio.h"
#include "ws2812.h"
#include "ws2812.pio.h"
#define WS2812_PIN 7
#define IS_RGBW false
uint32_t couleur[13];
uint32_t buffer_couleur[12];
void ws2812_init(){
/*couleur[0]=0x000200;
couleur[1]=0x010200;
couleur[2]=0x020200;
couleur[3]=0x020100;
couleur[4]=0x020000;
couleur[5]=0x020001;
couleur[6]=0x020002;
couleur[7]=0x010002;
couleur[8]=0x000002;
couleur[9]=0x000102;
couleur[10]=0x000202;
couleur[11]=0x000201;
couleur[12]=0x000200;*/
couleur[0]=0x002000;
couleur[1]=0x102000;
couleur[2]=0x202000;
couleur[3]=0x201000;
couleur[4]=0x200000;
couleur[5]=0x200010;
couleur[6]=0x200020;
couleur[7]=0x100020;
couleur[8]=0x000020;
couleur[9]=0x001020;
couleur[10]=0x002020;
couleur[11]=0x002010;
couleur[12]=0x002000;
/*couleur[0]=0x00FF00;
couleur[1]=0x80FF00;
couleur[2]=0xFFFF00;
couleur[3]=0xFF8000;
couleur[4]=0xFF0000;
couleur[5]=0xFF0080;
couleur[6]=0xFF00FF;
couleur[7]=0x8000FF;
couleur[8]=0x0000FF;
couleur[9]=0x0080FF;
couleur[10]=0x00FFFF;
couleur[11]=0x00FF80;
couleur[12]=0x00FF00;*/
// initialisation du PIO
PIO pio = pio0;
int sm = 0;
uint offset = pio_add_program(pio, &ws2812_program);
ws2812_program_init(pio, sm, offset, WS2812_PIN, 800000, IS_RGBW);
// Tout rouge !
for(uint32_t i = 0; i<12; i++){
ws2812_set_buffer_rgb(0x10, 0, 0, i);
}
ws2812_affiche_buffer();
}
static inline void put_pixel(uint32_t pixel_grb) {
pio_sm_put_blocking(pio0, 0, pixel_grb << 8u);
}
static inline uint32_t urgb_u32(uint8_t r, uint8_t g, uint8_t b) {
return
((uint32_t) (r) << 8) |
((uint32_t) (g) << 16) |
(uint32_t) (b);
}
void ws2812_affiche_buffer(){
for(uint32_t i = 0; i<12; i++){
put_pixel(buffer_couleur[i]);
}
}
void ws2812_set_buffer_rgb(uint8_t rouge, uint8_t vert, uint8_t bleu, uint8_t index_led){
if(index_led <12){
buffer_couleur[index_led] = urgb_u32(rouge, vert,bleu);
}
}

5
ws2812.h Normal file
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@ -0,0 +1,5 @@
#include "pico/stdlib.h"
void ws2812_init(void);
void ws2812_affiche_buffer(void);
void ws2812_set_buffer_rgb(uint8_t rouge, uint8_t vert, uint8_t bleu, uint8_t index_led);

85
ws2812.pio Normal file
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@ -0,0 +1,85 @@
;
; Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
;
; SPDX-License-Identifier: BSD-3-Clause
;
.program ws2812
.side_set 1
.define public T1 2
.define public T2 5
.define public T3 3
.lang_opt python sideset_init = pico.PIO.OUT_HIGH
.lang_opt python out_init = pico.PIO.OUT_HIGH
.lang_opt python out_shiftdir = 1
.wrap_target
bitloop:
out x, 1 side 0 [T3 - 1] ; Side-set still takes place when instruction stalls
jmp !x do_zero side 1 [T1 - 1] ; Branch on the bit we shifted out. Positive pulse
do_one:
jmp bitloop side 1 [T2 - 1] ; Continue driving high, for a long pulse
do_zero:
nop side 0 [T2 - 1] ; Or drive low, for a short pulse
.wrap
% c-sdk {
#include "hardware/clocks.h"
static inline void ws2812_program_init(PIO pio, uint sm, uint offset, uint pin, float freq, bool rgbw) {
pio_gpio_init(pio, pin);
pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, true);
pio_sm_config c = ws2812_program_get_default_config(offset);
sm_config_set_sideset_pins(&c, pin);
sm_config_set_out_shift(&c, false, true, rgbw ? 32 : 24);
sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
int cycles_per_bit = ws2812_T1 + ws2812_T2 + ws2812_T3;
float div = clock_get_hz(clk_sys) / (freq * cycles_per_bit);
sm_config_set_clkdiv(&c, div);
pio_sm_init(pio, sm, offset, &c);
pio_sm_set_enabled(pio, sm, true);
}
%}
.program ws2812_parallel
.define public T1 2
.define public T2 5
.define public T3 3
.wrap_target
out x, 32
mov pins, !null [T1-1]
mov pins, x [T2-1]
mov pins, null [T3-2]
.wrap
% c-sdk {
#include "hardware/clocks.h"
static inline void ws2812_parallel_program_init(PIO pio, uint sm, uint offset, uint pin_base, uint pin_count, float freq) {
for(uint i=pin_base; i<pin_base+pin_count; i++) {
pio_gpio_init(pio, i);
}
pio_sm_set_consecutive_pindirs(pio, sm, pin_base, pin_count, true);
pio_sm_config c = ws2812_parallel_program_get_default_config(offset);
sm_config_set_out_shift(&c, true, true, 32);
sm_config_set_out_pins(&c, pin_base, pin_count);
sm_config_set_set_pins(&c, pin_base, pin_count);
sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
int cycles_per_bit = ws2812_parallel_T1 + ws2812_parallel_T2 + ws2812_parallel_T3;
float div = clock_get_hz(clk_sys) / (freq * cycles_per_bit);
sm_config_set_clkdiv(&c, div);
pio_sm_init(pio, sm, offset, &c);
pio_sm_set_enabled(pio, sm, true);
}
%}