129 lines
3.6 KiB
C++
129 lines
3.6 KiB
C++
#pragma once
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#include <cstring>
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#include "pico/stdlib.h"
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#include "hardware/spi.h"
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#include "hardware/gpio.h"
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#include "common/pimoroni_common.hpp"
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#include "common/pimoroni_bus.hpp"
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#include "libraries/pico_graphics/pico_graphics.hpp"
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// 8 MB PSRam
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namespace pimoroni {
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class PSRamDisplay : public IDirectDisplayDriver<uint8_t> {
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//--------------------------------------------------
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// Variables
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//--------------------------------------------------
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private:
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spi_inst_t *spi = PIMORONI_SPI_DEFAULT_INSTANCE;
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// interface pins with our standard defaults where appropriate
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uint CS = 3;
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uint DC = PIN_UNUSED;
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uint SCK = SPI_DEFAULT_SCK;
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uint MOSI = SPI_DEFAULT_MOSI;
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uint MISO = SPI_DEFAULT_MISO;
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uint32_t start_address = 0;
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uint16_t width = 0;
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uint16_t height = 0;
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absolute_time_t timeout;
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bool blocking = false;
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public:
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enum colour : uint8_t {
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BLACK = 0,
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WHITE = 1,
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GREEN = 2,
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BLUE = 3,
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RED = 4,
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YELLOW = 5,
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ORANGE = 6,
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CLEAN = 7
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};
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PSRamDisplay(uint16_t width, uint16_t height) : PSRamDisplay(width, height, {PIMORONI_SPI_DEFAULT_INSTANCE, 3, SPI_DEFAULT_SCK, SPI_DEFAULT_MOSI, PIN_UNUSED, PIN_UNUSED, PIN_UNUSED}) {};
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PSRamDisplay(uint16_t width, uint16_t height, SPIPins pins) :
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spi(pins.spi),
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CS(pins.cs), DC(pins.dc), SCK(pins.sck), MOSI(pins.mosi),
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width(width), height(height) {
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init();
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}
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//--------------------------------------------------
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// Methods
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//--------------------------------------------------
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public:
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void test(void){
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char writeBuffer[1024];
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char readBuffer[1024];
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uint mb = 8;
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for(uint k = 0; k < 1024*mb; k++)
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{
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sprintf(writeBuffer, "%u", k);
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write(k*1024, strlen(writeBuffer)+1, (uint8_t *)writeBuffer);
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}
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bool bSame = true;
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for(uint k = 0; k < 1024*mb && bSame; k++)
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{
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sprintf(writeBuffer, "%u", k);
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read(k*1024, strlen(writeBuffer)+1, (uint8_t *)readBuffer);
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bSame = strcmp(writeBuffer, readBuffer) ==0;
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printf("[%u] %s == %s ? %s\n", k, writeBuffer, readBuffer, bSame ? "Success" : "Failure");
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}
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}
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void write_pixel(const Point &p, uint8_t colour) override;
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void write_pixel_span(const Point &p, uint l, uint8_t colour) override;
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void read_pixel_span(const Point &p, uint l, uint8_t *data) override;
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int __not_in_flash_func(SpiSetBlocking)(const uint16_t uSrc, size_t uLen)
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{
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invalid_params_if(SPI, 0 > (int)uLen);
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// Deliberately overflow FIFO, then clean up afterward, to minimise amount
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// of APB polling required per halfword
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for (size_t i = 0; i < uLen; ++i) {
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while (!spi_is_writable(spi))
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tight_loop_contents();
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spi_get_hw(spi)->dr = uSrc;
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}
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while (spi_is_readable(spi))
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(void)spi_get_hw(spi)->dr;
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while (spi_get_hw(spi)->sr & SPI_SSPSR_BSY_BITS)
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tight_loop_contents();
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while (spi_is_readable(spi))
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(void)spi_get_hw(spi)->dr;
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// Don't leave overrun flag set
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spi_get_hw(spi)->icr = SPI_SSPICR_RORIC_BITS;
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return (int)uLen;
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}
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private:
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void init();
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void write(uint32_t address, size_t len, const uint8_t *data);
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void write(uint32_t address, size_t len, const uint8_t byte);
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void read(uint32_t address, size_t len, uint8_t *data);
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uint32_t pointToAddress(const Point &p)
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{
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return start_address + (p.y * width) + p.x;
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}
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};
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}
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