kopia lustrzana https://github.com/pimoroni/pimoroni-pico
76 wiersze
2.1 KiB
C++
76 wiersze
2.1 KiB
C++
#include "psram_display.hpp"
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#include <cstdlib>
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#include <math.h>
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#include <string.h>
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namespace pimoroni {
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enum reg {
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WRITE = 0x02,
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READ = 0x03,
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RESET_ENABLE = 0x66,
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RESET = 0x99
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};
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void PSRamDisplay::init() {
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uint baud = spi_init(spi, 31'250'000);
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printf("PSRam connected at %u\n", baud);
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gpio_set_function(CS, GPIO_FUNC_SIO);
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gpio_set_dir(CS, GPIO_OUT);
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gpio_put(CS, 1);
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gpio_set_function(SCK, GPIO_FUNC_SPI);
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gpio_set_function(MOSI, GPIO_FUNC_SPI);
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gpio_set_function(MISO, GPIO_FUNC_SPI);
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gpio_put(CS, 0);
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uint8_t command_buffer[2] = {RESET_ENABLE, RESET};
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spi_write_blocking(spi, command_buffer, 2);
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gpio_put(CS, 1);
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}
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void PSRamDisplay::write(uint32_t address, size_t len, const uint8_t *data)
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{
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gpio_put(CS, 0);
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uint8_t command_buffer[4] = {WRITE, (uint8_t)((address >> 16) & 0xFF), (uint8_t)((address >> 8) & 0xFF), (uint8_t)(address & 0xFF)};
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spi_write_blocking(spi, command_buffer, 4);
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spi_write_blocking(spi, data, len);
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gpio_put(CS, 1);
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}
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void PSRamDisplay::write(uint32_t address, size_t len, const uint8_t byte)
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{
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gpio_put(CS, 0);
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uint8_t command_buffer[4] = {WRITE, (uint8_t)((address >> 16) & 0xFF), (uint8_t)((address >> 8) & 0xFF), (uint8_t)(address & 0xFF)};
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spi_write_blocking(spi, command_buffer, 4);
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SpiSetBlocking(byte, len);
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gpio_put(CS, 1);
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}
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void PSRamDisplay::read(uint32_t address, size_t len, uint8_t *data)
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{
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gpio_put(CS, 0);
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uint8_t command_buffer[4] = {READ, (uint8_t)((address >> 16) & 0xFF), (uint8_t)((address >> 8) & 0xFF), (uint8_t)(address & 0xFF)};
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spi_write_blocking(spi, command_buffer, 4);
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spi_read_blocking(spi, 0, data, len);
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gpio_put(CS, 1);
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}
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void PSRamDisplay::write_pixel(const Point &p, uint8_t colour)
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{
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write(pointToAddress(p), 1, colour);
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}
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void PSRamDisplay::write_pixel_span(const Point &p, uint l, uint8_t colour)
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{
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write(pointToAddress(p), l, colour);
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}
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void PSRamDisplay::read_pixel_span(const Point &p, uint l, uint8_t *data)
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{
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read(pointToAddress(p), l, data);
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}
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}
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