Initial setup for PMW/PAA flow sensor

driver/pwm3901
ZodiusInfuser 2021-05-21 17:35:01 +01:00
rodzic 3c3b29cfc0
commit 77f082a984
17 zmienionych plików z 577 dodań i 0 usunięć

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@ -3,6 +3,7 @@ add_subdirectory(esp32spi)
add_subdirectory(ioexpander)
add_subdirectory(ltp305)
add_subdirectory(ltr559)
add_subdirectory(pmw3901)
add_subdirectory(sgp30)
add_subdirectory(st7735)
add_subdirectory(st7789)

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@ -0,0 +1 @@
include(pmw3901.cmake)

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@ -0,0 +1,10 @@
set(DRIVER_NAME pmw3901)
add_library(${DRIVER_NAME} INTERFACE)
target_sources(${DRIVER_NAME} INTERFACE
${CMAKE_CURRENT_LIST_DIR}/${DRIVER_NAME}.cpp)
target_include_directories(${DRIVER_NAME} INTERFACE ${CMAKE_CURRENT_LIST_DIR})
# Pull in pico libraries that we need
target_link_libraries(${DRIVER_NAME} INTERFACE pico_stdlib hardware_spi hardware_pwm hardware_dma)

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#include "pmw3901.hpp"
#include <cstdlib>
#include <math.h>
#include <cstdio>
#include <algorithm>
namespace pimoroni {
enum reg : uint8_t {
ID = 0x00,
REVISION = 0x01,
DATA_READY = 0x02,
MOTION_BURST = 0x16,
POWER_UP_RESET = 0x3a,
ORIENTATION = 0x5b,
RESOLUTION = 0x4e, // PAA5100 only
};
bool PMW3901::init() {
// configure spi interface and pins
spi_init(spi, spi_baud);
gpio_set_function(cs, GPIO_FUNC_SIO);
gpio_set_dir(cs, GPIO_OUT);
gpio_set_function(sck, GPIO_FUNC_SPI);
gpio_set_function(mosi, GPIO_FUNC_SPI);
gpio_set_function(miso, GPIO_FUNC_SPI);
if(interrupt != PIN_UNUSED) {
gpio_set_function(interrupt, GPIO_FUNC_SIO);
gpio_set_dir(interrupt, GPIO_IN);
gpio_pull_up(interrupt);
}
cs_select();
sleep_ms(50);
cs_deselect();
write_register(reg::POWER_UP_RESET, 0x5a);
sleep_ms(20);
for(uint8_t offset = 0; offset < 5; offset++) {
uint8_t data = 0;
read_registers(reg::DATA_READY + offset, &data, 1);
}
secret_sauce();
uint8_t product_id = get_id();
uint8_t revision = get_revision();
printf("Product ID and Revision for PMW3901: %d, %d\n", product_id, revision);
if(product_id != 0x49 || revision != 0x00) {
return false;
}
return true;
}
spi_inst_t* PMW3901::get_spi() const {
return spi;
}
int PMW3901::get_cs() const {
return cs;
}
int PMW3901::get_sck() const {
return sck;
}
int PMW3901::get_mosi() const {
return mosi;
}
int PMW3901::get_miso() const {
return miso;
}
int PMW3901::get_int() const {
return interrupt;
}
uint8_t PMW3901::get_id() {
uint8_t data = 0;
read_registers(reg::ID, &data, 1);
return data;
}
uint8_t PMW3901::get_revision() {
uint8_t data = 0;
read_registers(reg::REVISION, &data, 1);
return data;
}
void PMW3901::set_rotation(Degrees degrees) {
switch(degrees) {
default:
case DEGREES_0:
set_orientation(true, true, true);
break;
case DEGREES_90:
set_orientation(false, true, false);
break;
case DEGREES_180:
set_orientation(false, false, true);
break;
case DEGREES_270:
set_orientation(true, false, false);
break;
}
}
void PMW3901::set_orientation(bool invert_x, bool invert_y, bool swap_xy) {
uint8_t value = 0;
if(swap_xy)
value |= 0b10000000;
if(invert_y)
value |= 0b01000000;
if(invert_x)
value |= 0b00100000;
write_register(reg::ORIENTATION, value);
}
bool PMW3901::get_motion(int16_t& x_out, int16_t& y_out, uint16_t timeout_ms) {
uint32_t start_time = millis();
while(millis() - start_time < timeout_ms) {
uint8_t buf[12];
read_registers(reg::MOTION_BURST, buf, 12);
uint8_t dr = buf[0];
//uint8_t obs = buf[1];
x_out = (int16_t)((int32_t)buf[2] << 8 | buf[3]);
y_out = (int16_t)((int32_t)buf[4] << 8 | buf[5]);
uint8_t quality = buf[6];
//uint8_t raw_sum = buf[7];
//uint8_t raw_max = buf[8];
//uint8_t raw_min = buf[9];
uint8_t shutter_upper = buf[10];
//uint8_t shutter_lower = buf[11];
printf("dr = %d, x = %d, y = %d\n",dr, x_out, y_out);
if((dr & 0b10000000) && !((quality < 0x19) && (shutter_upper = 0x1f)))
return true;
sleep_ms(1);
}
return false;
}
bool PMW3901::get_motion_slow(int16_t& x_out, int16_t& y_out, uint16_t timeout_ms) {
uint32_t start_time = millis();
while(millis() - start_time < timeout_ms) {
uint8_t buf[5];
read_registers(reg::DATA_READY, buf, 5);
uint8_t dr = buf[0];
x_out = (int16_t)((int32_t)buf[1] << 8 | buf[2]);
y_out = (int16_t)((int32_t)buf[3] << 8 | buf[4]);
printf("dr = %d, x = %d, y = %d\n",dr, x_out, y_out);
if(dr & 0b10000000)
return true;
sleep_ms(1);
}
return false;
}
void PMW3901::frame_capture(uint16_t timeout_ms) {
}
void PMW3901::cs_select() {
gpio_put(cs, false); // Active low
}
void PMW3901::cs_deselect() {
gpio_put(cs, true);
}
void PMW3901::write_register(uint8_t reg, uint8_t data) {
uint8_t buf[2];
buf[0] = reg | 0x80;
buf[1] = data;
cs_select();
spi_write_blocking(spi, buf, 2);
cs_deselect();
}
void PMW3901::write_buffer(uint8_t *buf, uint16_t len) {
cs_select();
for(uint8_t i = 0; i < len; i += 2) {
if(buf[i] == WAIT)
sleep_ms(buf[i + 1]);
else
spi_write_blocking(spi, &buf[i], 2);
}
cs_deselect();
}
void PMW3901::read_registers(uint8_t reg, uint8_t *buf, uint16_t len) {
cs_select();
spi_write_blocking(spi, &reg, 1);
spi_read_blocking(spi, 0, buf, len);
cs_deselect();
}
uint8_t PMW3901::read_register(uint8_t reg) {
uint8_t data = 0;
cs_select();
spi_write_blocking(spi, &reg, 1);
spi_read_blocking(spi, 0, &data, 1);
cs_deselect();
return data;
}
void PMW3901::secret_sauce() {
uint8_t buf[] = {
0x7f, 0x00,
0x55, 0x01,
0x50, 0x07,
0x7f, 0x0e,
0x43, 0x10
};
write_buffer(buf, sizeof(buf));
if(read_register(0x67) & 0b10000000)
write_register(0x48, 0x04);
else
write_register(0x48, 0x02);
uint8_t buf2[] = {
0x7f, 0x00,
0x51, 0x7b,
0x50, 0x00,
0x55, 0x00,
0x7f, 0x0E
};
write_buffer(buf2, sizeof(buf2));
if(read_register(0x73) == 0x00) {
uint8_t c1 = read_register(0x70);
uint8_t c2 = read_register(0x71);
if(c1 <= 28)
c1 += 14;
if(c1 > 28)
c1 += 11;
c1 = std::max((uint8_t)0, std::min((uint8_t)0x3F, c1));
c2 = (c2 * 45); // 100
uint8_t buf3[] = {
0x7f, 0x00,
0x61, 0xad,
0x51, 0x70,
0x7f, 0x0e
};
write_buffer(buf3, sizeof(buf3));
write_register(0x70, c1);
write_register(0x71, c2);
}
uint8_t buf4[] = {
0x7f, 0x00,
0x61, 0xad,
0x7f, 0x03,
0x40, 0x00,
0x7f, 0x05,
0x41, 0xb3,
0x43, 0xf1,
0x45, 0x14,
0x5b, 0x32,
0x5f, 0x34,
0x7b, 0x08,
0x7f, 0x06,
0x44, 0x1b,
0x40, 0xbf,
0x4e, 0x3f,
0x7f, 0x08,
0x65, 0x20,
0x6a, 0x18,
0x7f, 0x09,
0x4f, 0xaf,
0x5f, 0x40,
0x48, 0x80,
0x49, 0x80,
0x57, 0x77,
0x60, 0x78,
0x61, 0x78,
0x62, 0x08,
0x63, 0x50,
0x7f, 0x0a,
0x45, 0x60,
0x7f, 0x00,
0x4d, 0x11,
0x55, 0x80,
0x74, 0x21,
0x75, 0x1f,
0x4a, 0x78,
0x4b, 0x78,
0x44, 0x08,
0x45, 0x50,
0x64, 0xff,
0x65, 0x1f,
0x7f, 0x14,
0x65, 0x67,
0x66, 0x08,
0x63, 0x70,
0x7f, 0x15,
0x48, 0x48,
0x7f, 0x07,
0x41, 0x0d,
0x43, 0x14,
0x4b, 0x0e,
0x45, 0x0f,
0x44, 0x42,
0x4c, 0x80,
0x7f, 0x10,
0x5b, 0x02,
0x7f, 0x07,
0x40, 0x41,
0x70, 0x00,
WAIT, 0x0A, // Sleep for 10ms
0x32, 0x44,
0x7f, 0x07,
0x40, 0x40,
0x7f, 0x06,
0x62, 0xf0,
0x63, 0x00,
0x7f, 0x0d,
0x48, 0xc0,
0x6f, 0xd5,
0x7f, 0x00,
0x5b, 0xa0,
0x4e, 0xa8,
0x5a, 0x50,
0x40, 0x80,
WAIT, 0xF0,
0x7f, 0x14, // Enable LED_N pulsing
0x6f, 0x1c,
0x7f, 0x00
};
write_buffer(buf4, sizeof(buf4));
}
uint32_t PMW3901::millis() {
return to_ms_since_boot(get_absolute_time());
}
}

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#pragma once
#include "hardware/spi.h"
#include "hardware/gpio.h"
#include "../../common/pimoroni_common.hpp"
namespace pimoroni {
class PMW3901 {
spi_inst_t *spi = PIMORONI_SPI_DEFAULT_INSTANCE;
//--------------------------------------------------
// Constants
//--------------------------------------------------
private:
static const uint8_t WAIT = -1;
//--------------------------------------------------
// Enums
//--------------------------------------------------
public:
enum Degrees {
DEGREES_0 = 0,
DEGREES_90,
DEGREES_180,
DEGREES_270,
};
//--------------------------------------------------
// Variables
//--------------------------------------------------
private:
// interface pins with our standard defaults where appropriate
uint cs = SPI_BG_FRONT_CS;
uint sck = SPI_DEFAULT_SCK;
uint mosi = SPI_DEFAULT_MOSI;
uint miso = SPI_DEFAULT_MISO;
uint interrupt = SPI_BG_FRONT_PWM;
uint32_t spi_baud = 400000;
//--------------------------------------------------
// Constructors/Destructor
//--------------------------------------------------
public:
PMW3901() {}
PMW3901(BG_SPI_SLOT slot) {
switch(slot) {
case BG_SPI_FRONT:
cs = SPI_BG_FRONT_CS;
interrupt = SPI_BG_FRONT_PWM;
break;
case BG_SPI_BACK:
cs = SPI_BG_BACK_CS;
interrupt = SPI_BG_BACK_PWM;
break;
}
}
PMW3901(spi_inst_t *spi,
uint cs, uint sck, uint mosi, uint miso, uint interrupt) :
spi(spi),
cs(cs), sck(sck), mosi(mosi), miso(miso), interrupt(interrupt) {}
//--------------------------------------------------
// Methods
//--------------------------------------------------
public:
bool init();
spi_inst_t* get_spi() const;
int get_cs() const;
int get_sck() const;
int get_mosi() const;
int get_miso() const;
int get_int() const;
uint8_t get_id();
uint8_t get_revision();
void set_rotation(Degrees degrees = DEGREES_0);
void set_orientation(bool invert_x = true, bool invert_y = true, bool swap_xy = true);
bool get_motion(int16_t& x_out, int16_t& y_out, uint16_t timeout_ms = 5000);
bool get_motion_slow(int16_t& x_out, int16_t& y_out, uint16_t timeout_ms = 5000);
void frame_capture(uint16_t timeout_ms = 10000);
protected:
virtual void secret_sauce();
private:
void cs_select();
void cs_deselect();
void write_register(uint8_t reg, uint8_t data);
void write_buffer(uint8_t *buf, uint16_t len);
void read_registers(uint8_t reg, uint8_t *buf, uint16_t len);
uint8_t read_register(uint8_t reg);
uint32_t millis();
};
}

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@ -7,6 +7,7 @@ add_subdirectory(breakout_roundlcd)
add_subdirectory(breakout_rgbmatrix5x5)
add_subdirectory(breakout_matrix11x7)
add_subdirectory(breakout_mics6814)
add_subdirectory(breakout_pmw3901)
add_subdirectory(breakout_potentiometer)
add_subdirectory(breakout_rtc)
add_subdirectory(breakout_trackball)

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@ -0,0 +1,16 @@
set(OUTPUT_NAME pmw3901_demo)
add_executable(
${OUTPUT_NAME}
demo.cpp
)
# enable usb output, disable uart output
pico_enable_stdio_usb(${OUTPUT_NAME} 1)
pico_enable_stdio_uart(${OUTPUT_NAME} 1)
# Pull in pico libraries that we need
target_link_libraries(${OUTPUT_NAME} pico_stdlib breakout_pmw3901)
# create map/bin/hex file etc.
pico_add_extra_outputs(${OUTPUT_NAME})

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#include <stdio.h>
#include "pico/stdlib.h"
#include "breakout_pmw3901.hpp"
using namespace pimoroni;
BreakoutPMW3901 flo;
int main() {
stdio_init_all();
sleep_ms(10000);
flo.init();
flo.set_rotation(BreakoutPMW3901::DEGREES_0);
//uint8_t tx = 0, ty = 0;
int16_t x = 0, y = 0;
while(true) {
flo.get_motion(x, y);
printf("tick\n");
//tx;
sleep_ms(1000);
};
return 0;
}

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@ -8,6 +8,8 @@ add_subdirectory(breakout_roundlcd)
add_subdirectory(breakout_rgbmatrix5x5)
add_subdirectory(breakout_matrix11x7)
add_subdirectory(breakout_mics6814)
add_subdirectory(breakout_paa5100)
add_subdirectory(breakout_pmw3901)
add_subdirectory(breakout_potentiometer)
add_subdirectory(breakout_rtc)
add_subdirectory(breakout_trackball)

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include(breakout_paa5100.cmake)

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set(LIB_NAME breakout_paa5100)
add_library(${LIB_NAME} INTERFACE)
target_sources(${LIB_NAME} INTERFACE
${CMAKE_CURRENT_LIST_DIR}/${LIB_NAME}.cpp
)
target_include_directories(${LIB_NAME} INTERFACE ${CMAKE_CURRENT_LIST_DIR})
# Pull in pico libraries that we need
target_link_libraries(${LIB_NAME} INTERFACE pico_stdlib pmw3901)

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@ -0,0 +1,5 @@
#include "breakout_paa5100.hpp"
namespace pimoroni {
}

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#pragma once
#include "drivers/pmw3901/pmw3901.hpp"
namespace pimoroni {
typedef PMW3901 BreakoutPAA5100;
}

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include(breakout_pmw3901.cmake)

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set(LIB_NAME breakout_pmw3901)
add_library(${LIB_NAME} INTERFACE)
target_sources(${LIB_NAME} INTERFACE
${CMAKE_CURRENT_LIST_DIR}/${LIB_NAME}.cpp
)
target_include_directories(${LIB_NAME} INTERFACE ${CMAKE_CURRENT_LIST_DIR})
# Pull in pico libraries that we need
target_link_libraries(${LIB_NAME} INTERFACE pico_stdlib pmw3901)

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#include "breakout_pmw3901.hpp"
namespace pimoroni {
}

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#pragma once
#include "drivers/pmw3901/pmw3901.hpp"
namespace pimoroni {
typedef PMW3901 BreakoutPMW3901;
}