kopia lustrzana https://github.com/pimoroni/pimoroni-pico
UC8159: Basic driver
Phil Howard
rodzic
0e72369c7b
commit
c6074963fa
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@ -28,6 +28,7 @@ add_subdirectory(icp10125)
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add_subdirectory(scd4x)
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add_subdirectory(hub75)
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add_subdirectory(uc8151)
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add_subdirectory(uc8159)
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add_subdirectory(uc8151_legacy)
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add_subdirectory(pwm)
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add_subdirectory(servo)
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@ -37,4 +38,3 @@ add_subdirectory(vl53l5cx)
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add_subdirectory(pcf85063a)
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add_subdirectory(pms5003)
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add_subdirectory(sh1107)
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@ -0,0 +1 @@
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include(uc8159.cmake)
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@ -0,0 +1,10 @@
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set(DRIVER_NAME uc8159)
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add_library(${DRIVER_NAME} INTERFACE)
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target_sources(${DRIVER_NAME} INTERFACE
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${CMAKE_CURRENT_LIST_DIR}/${DRIVER_NAME}.cpp)
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target_include_directories(${DRIVER_NAME} INTERFACE ${CMAKE_CURRENT_LIST_DIR})
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# Pull in pico libraries that we need
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target_link_libraries(${DRIVER_NAME} INTERFACE pico_stdlib hardware_spi)
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@ -0,0 +1,231 @@
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#include "uc8159.hpp"
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#include <cstdlib>
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#include <math.h>
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namespace pimoroni {
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enum reg {
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PSR = 0x00,
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PWR = 0x01,
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POF = 0x02,
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PFS = 0x03,
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PON = 0x04,
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BTST = 0x06,
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DSLP = 0x07,
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DTM1 = 0x10,
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DSP = 0x11,
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DRF = 0x12,
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IPC = 0x13,
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PLL = 0x30,
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TSC = 0x40,
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TSE = 0x41,
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TSW = 0x42,
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TSR = 0x43,
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CDI = 0x50,
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LPD = 0x51,
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TCON = 0x60,
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TRES = 0x61,
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DAM = 0x65,
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REV = 0x70,
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FLG = 0x71,
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AMV = 0x80,
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VV = 0x81,
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VDCS = 0x82,
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PWS = 0xE3,
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TSSET = 0xE5
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};
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bool UC8159::is_busy() {
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return !gpio_get(BUSY);
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}
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void UC8159::busy_wait() {
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while(is_busy()) {
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tight_loop_contents();
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}
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}
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void UC8159::reset() {
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gpio_put(RESET, 0); sleep_ms(10);
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gpio_put(RESET, 1); sleep_ms(10);
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busy_wait();
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}
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void UC8159::init() {
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// configure spi interface and pins
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spi_init(spi, 3'000'000);
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gpio_set_function(DC, GPIO_FUNC_SIO);
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gpio_set_dir(DC, GPIO_OUT);
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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(RESET, GPIO_FUNC_SIO);
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gpio_set_dir(RESET, GPIO_OUT);
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gpio_put(RESET, 1);
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gpio_set_function(BUSY, GPIO_FUNC_SIO);
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gpio_set_dir(BUSY, GPIO_IN);
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gpio_set_pulls(BUSY, true, false);
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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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};
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void UC8159::setup() {
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reset();
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busy_wait();
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/*
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Resolution Setting
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10bit horizontal followed by a 10bit vertical resolution
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we'll let struct.pack do the work here and send 16bit values
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life is too short for manual bit wrangling
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*/
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uint16_t resolution[2] = {
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__builtin_bswap16(width),
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__builtin_bswap16(height)
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};
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command(TRES, 4, {
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(uint8_t *)resolution
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});
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/*
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Panel Setting
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0b11000000 = Resolution select, 0b00 = 640x480, our panel is 0b11 = 600x448
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0b00100000 = LUT selection, 0 = ext flash, 1 = registers, we use ext flash
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0b00010000 = Ignore
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0b00001000 = Gate scan direction, 0 = down, 1 = up (default)
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0b00000100 = Source shift direction, 0 = left, 1 = right (default)
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0b00000010 = DC-DC converter, 0 = off, 1 = on
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0b00000001 = Soft reset, 0 = Reset, 1 = Normal (Default)
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0b11 = 600x448
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0b10 = 640x400
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*/
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command(PSR, {
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(uint8_t)((width == 640) ? 0b10101111 : 0b11101111),
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0x08 // UC8159 7-colour
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});
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command(PWR, {
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(0x06 << 3) | // ??? - not documented in UC8159 datasheet
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(0x01 << 2) | // SOURCE_INTERNAL_DC_DC
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(0x01 << 1) | // GATE_INTERNAL_DC_DC
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0x01, // LV_SOURCE_INTERNAL_DC_DC
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0x00, // VGx_20V
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0x23, // UC8159_7C
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0x23 // UC8159_7C
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});
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/*
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Set the PLL clock frequency to 50Hz
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0b11000000 = Ignore
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0b00111000 = M
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0b00000111 = N
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PLL = 2MHz * (M / N)
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PLL = 2MHz * (7 / 4)
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PLL = 2,800,000 ???
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*/
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command(PLL, 0x3C);
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command(TSE, 0x00);
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/*
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VCOM and Data Interval setting
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0b11100000 = Vborder control (0b001 = LUTB voltage)
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0b00010000 = Data polarity
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0b00001111 = Vcom and data interval (0b0111 = 10, default)
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*/
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command(CDI, (1 << 5) | 0x17);
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/*
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Gate/Source non-overlap period
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0b11110000 = Source to Gate (0b0010 = 12nS, default)
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0b00001111 = Gate to Source
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*/
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command(TCON, 0x22);
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// Disable externalflash
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command(DAM, 0x00);
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command(PWS, 0xAA);
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command(PFS, 0x00);
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//power_off();
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}
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void UC8159::power_off() {
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busy_wait();
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command(POF); // turn off
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}
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void UC8159::command(uint8_t reg, size_t len, const uint8_t *data) {
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gpio_put(CS, 0);
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gpio_put(DC, 0); // command mode
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spi_write_blocking(spi, ®, 1);
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if(len > 0) {
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gpio_put(DC, 1); // data mode
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spi_write_blocking(spi, (const uint8_t*)data, len);
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}
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gpio_put(CS, 1);
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}
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void UC8159::data(size_t len, const uint8_t *data) {
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gpio_put(CS, 0);
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gpio_put(DC, 1); // data mode
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spi_write_blocking(spi, (const uint8_t*)data, len);
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gpio_put(CS, 1);
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}
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void UC8159::command(uint8_t reg, std::initializer_list<uint8_t> values) {
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command(reg, values.size(), (uint8_t *)values.begin());
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}
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void UC8159::pixel(int x, int y, int v) {
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// bounds check
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if(x < 0 || y < 0 || x >= width || y >= height) return;
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// pointer to byte in framebuffer that contains this pixel
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uint8_t *p = &frame_buffer[(x / 2) + (y * width / 2)];
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uint8_t o = (x & 0b1) * 4; // bit offset within byte
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uint8_t m = ~(0b1111 << o); // bit mask for byte
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uint8_t b = v << o; // bit value shifted to position
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*p &= m; // clear bits
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*p |= b; // set value
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}
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void UC8159::update(bool blocking) {
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if(blocking) {
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busy_wait();
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}
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setup();
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command(DTM1, (width * height) / 2, frame_buffer); // transmit framebuffer
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busy_wait();
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command(PON); // turn on
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busy_wait();
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command(DRF); // start display refresh
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busy_wait();
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if(blocking) {
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busy_wait();
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command(POF); // turn off
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}
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}
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}
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@ -0,0 +1,89 @@
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#pragma once
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#include <initializer_list>
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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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namespace pimoroni {
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class UC8159 {
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//--------------------------------------------------
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// Variables
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//--------------------------------------------------
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private:
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// screen properties
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uint16_t width;
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uint16_t height;
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// highest possible resolution is 160x296 which at 1 bit per pixel
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// requires 5920 bytes of frame buffer
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//uint8_t frame_buffer[5920] = {0};
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uint8_t *frame_buffer;
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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 = SPI_BG_FRONT_CS;
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uint DC = 27;
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uint SCK = SPI_DEFAULT_SCK;
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uint MOSI = SPI_DEFAULT_MOSI;
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uint BUSY = 26;
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uint RESET = 25;
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bool inverted = false;
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public:
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UC8159(uint16_t width, uint16_t height) :
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width(width), height(height), frame_buffer(new uint8_t[width * height / 2]) {
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}
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UC8159(uint16_t width, uint16_t height, uint8_t *frame_buffer) :
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width(width), height(height), frame_buffer(frame_buffer) {
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}
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UC8159(uint16_t width, uint16_t height,
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spi_inst_t *spi,
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uint CS, uint DC, uint SCK, uint MOSI,
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uint BUSY = PIN_UNUSED, uint RESET = PIN_UNUSED) :
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width(width), height(height),
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frame_buffer(new uint8_t[width * height / 2]),
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spi(spi),
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CS(CS), DC(DC), SCK(SCK), MOSI(MOSI), BUSY(BUSY), RESET(RESET) {}
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UC8159(uint16_t width, uint16_t height,
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uint8_t *frame_buffer,
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spi_inst_t *spi,
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uint CS, uint DC, uint SCK, uint MOSI,
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uint BUSY = PIN_UNUSED, uint RESET = PIN_UNUSED) :
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width(width), height(height),
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frame_buffer(frame_buffer),
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spi(spi),
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CS(CS), DC(DC), SCK(SCK), MOSI(MOSI), BUSY(BUSY), RESET(RESET) {}
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//--------------------------------------------------
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// Methods
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//--------------------------------------------------
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public:
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void init();
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void busy_wait();
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bool is_busy();
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void reset();
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void setup();
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void power_off();
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void command(uint8_t reg, size_t len, const uint8_t *data);
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void command(uint8_t reg, std::initializer_list<uint8_t> values);
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void command(uint8_t reg, const uint8_t data) {command(reg, 0, &data);};
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void command(uint8_t reg) {command(reg, 0, nullptr);};
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void data(size_t len, const uint8_t *data);
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void update(bool blocking = true);
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void pixel(int x, int y, int v);
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};
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}
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