kopia lustrzana https://github.com/oddwires/RP2040-code
master
Tony
rodzic
4994b7bf29
commit
94943c84cc
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@ -7,12 +7,15 @@ pico_generate_pio_header(FunctionGenerator ${CMAKE_CURRENT_LIST_DIR}/SlowDAC.pio
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target_sources(FunctionGenerator PRIVATE FunctionGenerator.cpp)
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# pull in common dependencies and additional spi hardware support
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target_link_libraries(FunctionGenerator PRIVATE
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pico_stdlib
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hardware_pio
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hardware_dma
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hardware_spi
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)
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# create map/bin/hex file etc.
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pico_add_extra_outputs(FunctionGenerator)
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# add url via pico_set_program_url
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@ -15,7 +15,7 @@
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// Note: No divider is specified for the SM, so it will default to the same speed as the CPU.
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void pio_FastDAC_program_init(PIO pio, uint sm, uint offset, uint pin) {
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for (uint i=2; i<11; i++) { pio_gpio_init(pio, i); }
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for (uint i=2; i<10; i++) { pio_gpio_init(pio, i); }
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pio_sm_set_consecutive_pindirs(pio, sm, 2, 8, true);
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pio_sm_config c = pio_FastDAC_program_get_default_config(offset);
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// sm_config_set_clkdiv(&c, div); // Set the clock divider for the state machine
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@ -5,18 +5,25 @@
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#include "hardware/irq.h"
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#include "hardware/clocks.h"
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#include "hardware/dma.h"
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#include "hardware/spi.h"
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#include "rotary_encoder.pio.h"
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#include "blink.pio.h"
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#include "FastDAC.pio.h"
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#include "SlowDAC.pio.h"
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#define sine_table_size 256 // Number of samples per period in sine table
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#define SW_2way_1 13 // GPIO connection
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#define SW_3way_1 14 // GPIO connection
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#define SW_3way_2 15 // GPIO connection
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#define sine_table_size 256 // Number of samples per period in sine table
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#define SW_2way_1 13 // GPIO connection
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#define SW_3way_1 14 // GPIO connection
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#define SW_3way_2 15 // GPIO connection
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// SPI connections...
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#define SPI_PORT spi1 // Port #1
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// PICO MCP41010
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#define PIN_SCK 10 // GPIO 10 (pin 14) -> SCK/spi1_sclk -> SCK (pin 2)
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#define PIN_MOSI 11 // GPIO 11 (pin 15) -> MOSI/spi1_tx -> SI (pin 3)
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#define PIN_CS 12 // GPIO 12 (pin 16) -> Chip select -> CS (pin 1)
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// Global variables...
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int SW_2way, Last_SW_2way, SW_3way, Last_SW_3way, ScanCtr, NixieVal, Frequency;
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int SW_2way, Last_SW_2way, SW_3way, Last_SW_3way, ScanCtr, NixieVal, ScaledVal, Frequency;
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int UpdateReq; // Flag from Rotary Encoder to main loop indicating a value has changed
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int DAC[5] = { 2, 3, 4, 5, 6 }; // DAC ports - DAC0=>2 DAC4=>6
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@ -143,7 +150,7 @@ void WriteCathodes (int Data) {
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}
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bool Repeating_Timer_Callback(struct repeating_timer *t) {
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// Scans the Nixie Anodes, and transfers data from the Nixie Buffers to the Cathodes.
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// Scans the Nixie Anodes, and transfers data from the Nixie Buffers to the Cathodes.
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switch (ScanCtr) {
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case 0:
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gpio_put(NixieAnodes[2], 0) ; // Turn off previous anode
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@ -254,6 +261,28 @@ void WaveForm_update (int _value) {
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NixieBuffer[2] = 10 ; // Blank Third Nixie ( 100's )
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}
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static inline void cs_select() {
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asm volatile("nop \n nop \n nop");
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gpio_put(PIN_CS, 0); // Active low
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asm volatile("nop \n nop \n nop");
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}
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static inline void cs_deselect() {
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asm volatile("nop \n nop \n nop");
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gpio_put(PIN_CS, 1);
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asm volatile("nop \n nop \n nop");
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}
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static void MCP41010_write(int _data) {
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// Formats and trnsmits 16 bit data word to the MCP41010 digital potentiometer...
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uint8_t buff[2];
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buff[0] = 0x11; // Control byte: Write to potentiometer #1
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buff[1] = _data; // Data byte
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cs_select();
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spi_write_blocking(SPI_PORT, buff, 2);
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cs_deselect();
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}
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int main() {
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static const float blink_freq = 16000; // Reduce SM clock to keep flash visible...
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float blink_div = (float)clock_get_hz(clk_sys) / blink_freq; // ... calculate the required blink SM clock divider
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@ -264,31 +293,36 @@ int main() {
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set_sys_clock_khz(280000, true); // Overclocking the core by a factor of 2 allows 1MHz from DAC
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stdio_init_all(); // needed for printf
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// This example will use SPI0 at 0.5MHz.
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spi_init(SPI_PORT, 500 * 1000);
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gpio_set_function(PIN_SCK, GPIO_FUNC_SPI);
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gpio_set_function(PIN_MOSI, GPIO_FUNC_SPI);
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// Set up the GPIO pins...
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const uint Onboard_LED = PICO_DEFAULT_LED_PIN; // Debug use - intialise the Onboard LED...
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gpio_init(Onboard_LED);
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gpio_set_dir(Onboard_LED, GPIO_OUT);
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// Initialise the Nixie cathodes...
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// Initialise the Nixie cathodes...
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for ( uint i = 0; i < sizeof(NixieCathodes) / sizeof( NixieCathodes[0]); i++ ) {
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gpio_init(NixieCathodes[i]);
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gpio_set_dir(NixieCathodes[i], GPIO_OUT); // Set as output
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}
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// Initialise the Nixe anodes...
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// Initialise the Nixe anodes...
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for ( uint i = 0; i < sizeof(NixieAnodes) / sizeof( NixieAnodes[0]); i++ ) {
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gpio_init(NixieAnodes[i]);
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gpio_set_dir(NixieAnodes[i], GPIO_OUT); // Set as output
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}
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// Initialise the rotary encoder...
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// Initialise the rotary encoder...
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for ( uint i = 0; i < sizeof(RotaryEncoder) / sizeof( EncoderPorts[0]); i++ ) {
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gpio_init(EncoderPorts[i]);
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gpio_set_dir(EncoderPorts[i], GPIO_IN); // Set as input
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gpio_pull_up(EncoderPorts[i]); // Enable pull up
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}
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// Initialise the 2-way switch inputs...
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// Initialise the 2-way switch inputs...
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gpio_init(SW_2way_1);
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gpio_set_dir(SW_2way_1, GPIO_IN);
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gpio_pull_up(SW_2way_1);
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// Initialise the 3-way switch inputs...
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// Initialise the 3-way switch inputs...
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gpio_init(SW_3way_1);
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gpio_set_dir(SW_3way_1, GPIO_IN);
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gpio_pull_up(SW_3way_1);
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@ -296,6 +330,11 @@ int main() {
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gpio_set_dir(SW_3way_2, GPIO_IN);
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gpio_pull_up(SW_3way_2);
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// SPI chip select is active-low, so we'll initialise it to a driven-high state...
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gpio_init(PIN_CS);
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gpio_set_dir(PIN_CS, GPIO_OUT);
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gpio_put(PIN_CS, 1);
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RotaryEncoder my_encoder(16, rotary_freq); // the A of the rotary encoder is connected to GPIO 16, B to GPIO 17
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// Confirm memory alignment
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@ -467,7 +506,9 @@ int main() {
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}
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if (UpdateReq & 0b001) { // Level has changed
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NixieVal = my_encoder.get_Level();
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printf("Level: %02d\n",NixieVal);
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ScaledVal = NixieVal*255/99; // Scale the level. Display: 0->99 - Potentiometer: 0->255
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printf("Level: %02d%% Level(Abs): %d\n",NixieVal,ScaledVal);
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MCP41010_write(ScaledVal); // Send over SPI to digital potentiometer
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NixieBuffer[0] = NixieVal % 10 ; // First Nixie ( 1's )
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NixieVal /= 10 ; // finished with teNixieValmp, so ok to trash it. NixieVal=>10's
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NixieBuffer[1] = NixieVal % 10 ; // Second Nixie ( 10's )
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@ -17,7 +17,7 @@
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// Note: No divider is specified for the SM, so it will default to the same speed as the CPU.
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void pio_SlowDAC_program_init(PIO pio, uint sm, uint offset, uint pin) {
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for (uint i=2; i<11; i++) { pio_gpio_init(pio, i); }
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for (uint i=2; i<10; i++) { pio_gpio_init(pio, i); }
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pio_sm_set_consecutive_pindirs(pio, sm, 2, 8, true);
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pio_sm_config c = pio_SlowDAC_program_get_default_config(offset);
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// sm_config_set_clkdiv(&c, div); // Set the clock divider for the state machine
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