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pimoroni-pico/drivers/uc8151/uc8151.cpp

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#include "uc8151.hpp"
#include <cstdlib>
#include <math.h>
namespace pimoroni {
enum reg {
PSR = 0x00,
PWR = 0x01,
POF = 0x02,
PFS = 0x03,
PON = 0x04,
PMES = 0x05,
BTST = 0x06,
DSLP = 0x07,
DTM1 = 0x10,
DSP = 0x11,
DRF = 0x12,
DTM2 = 0x13,
LUT_VCOM = 0x20,
LUT_WW = 0x21,
LUT_BW = 0x22,
LUT_WB = 0x23,
LUT_BB = 0x24,
PLL = 0x30,
TSC = 0x40,
TSE = 0x41,
TSR = 0x43,
TSW = 0x42,
CDI = 0x50,
LPD = 0x51,
TCON = 0x60,
TRES = 0x61,
REV = 0x70,
FLG = 0x71,
AMV = 0x80,
VV = 0x81,
VDCS = 0x82,
PTL = 0x90,
PTIN = 0x91,
PTOU = 0x92,
PGM = 0xa0,
APG = 0xa1,
ROTP = 0xa2,
CCSET = 0xe0,
PWS = 0xe3,
TSSET = 0xe5
};
bool UC8151::is_busy() {
return !gpio_get(BUSY);
}
void UC8151::busy_wait() {
while(is_busy()) {
tight_loop_contents();
}
}
void UC8151::reset() {
gpio_put(RESET, 0); sleep_ms(10);
gpio_put(RESET, 1); sleep_ms(10);
busy_wait();
}
void UC8151::default_luts() {
command(LUT_VCOM, {
0x00, 0x64, 0x64, 0x37, 0x00, 0x01,
0x00, 0x8c, 0x8c, 0x00, 0x00, 0x04,
0x00, 0x64, 0x64, 0x37, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00
});
command(LUT_WW, {
0x54, 0x64, 0x64, 0x37, 0x00, 0x01,
0x60, 0x8c, 0x8c, 0x00, 0x00, 0x04,
0xa8, 0x64, 0x64, 0x37, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_BW, {
0x54, 0x64, 0x64, 0x37, 0x00, 0x01,
0x60, 0x8c, 0x8c, 0x00, 0x00, 0x04,
0xa8, 0x64, 0x64, 0x37, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_WB, {
0xa8, 0x64, 0x64, 0x37, 0x00, 0x01,
0x60, 0x8c, 0x8c, 0x00, 0x00, 0x04,
0x54, 0x64, 0x64, 0x37, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_BB, {
0xa8, 0x64, 0x64, 0x37, 0x00, 0x01,
0x60, 0x8c, 0x8c, 0x00, 0x00, 0x04,
0x54, 0x64, 0x64, 0x37, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
busy_wait();
}
void UC8151::medium_luts() {
command(LUT_VCOM, {
0x00, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x00, 0x23, 0x23, 0x00, 0x00, 0x02,
0x00, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00
});
command(LUT_WW, {
0x54, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x60, 0x23, 0x23, 0x00, 0x00, 0x02,
0xa8, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_BW, {
0x54, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x60, 0x23, 0x23, 0x00, 0x00, 0x02,
0xa8, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_WB, {
0xa8, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x60, 0x23, 0x23, 0x00, 0x00, 0x02,
0x54, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_BB, {
0xa8, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x60, 0x23, 0x23, 0x00, 0x00, 0x02,
0x54, 0x16, 0x16, 0x0d, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
busy_wait();
}
void UC8151::fast_luts() {
// 0x3c, 0x00, 0x2b, 0x2b, 0x24, 0x1a, ????
command(LUT_VCOM, {
0x00, 0x04, 0x04, 0x07, 0x00, 0x01,
0x00, 0x0c, 0x0c, 0x00, 0x00, 0x02,
0x00, 0x04, 0x04, 0x07, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00
});
command(LUT_WW, {
0x54, 0x04, 0x04, 0x07, 0x00, 0x01,
0x60, 0x0c, 0x0c, 0x00, 0x00, 0x02,
0xa8, 0x04, 0x04, 0x07, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_BW, {
0x54, 0x04, 0x04, 0x07, 0x00, 0x01,
0x60, 0x0c, 0x0c, 0x00, 0x00, 0x02,
0xa8, 0x04, 0x04, 0x07, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_WB, {
0xa8, 0x04, 0x04, 0x07, 0x00, 0x01,
0x60, 0x0c, 0x0c, 0x00, 0x00, 0x02,
0x54, 0x04, 0x04, 0x07, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_BB, {
0xa8, 0x04, 0x04, 0x07, 0x00, 0x01,
0x60, 0x0c, 0x0c, 0x00, 0x00, 0x02,
0x54, 0x04, 0x04, 0x07, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(PLL, {
HZ_200
});
busy_wait();
}
void UC8151::turbo_luts() {
// 0x3c, 0x00, 0x2b, 0x2b, 0x24, 0x1a, ????
command(LUT_VCOM, {
0x00, 0x01, 0x01, 0x02, 0x00, 0x01,
0x00, 0x02, 0x02, 0x00, 0x00, 0x02,
0x00, 0x02, 0x02, 0x03, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00
});
command(LUT_WW, {
0x54, 0x01, 0x01, 0x02, 0x00, 0x01,
0x60, 0x02, 0x02, 0x00, 0x00, 0x02,
0xa8, 0x02, 0x02, 0x03, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_BW, {
0x54, 0x01, 0x01, 0x02, 0x00, 0x01,
0x60, 0x02, 0x02, 0x00, 0x00, 0x02,
0xa8, 0x02, 0x02, 0x03, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_WB, {
0xa8, 0x01, 0x01, 0x02, 0x00, 0x01,
0x60, 0x02, 0x02, 0x00, 0x00, 0x02,
0x54, 0x02, 0x02, 0x03, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(LUT_BB, {
0xa8, 0x01, 0x01, 0x02, 0x00, 0x01,
0x60, 0x02, 0x02, 0x00, 0x00, 0x02,
0x54, 0x02, 0x02, 0x03, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
});
command(PLL, {
HZ_200
});
busy_wait();
}
void UC8151::init() {
// configure spi interface and pins
spi_init(spi, 12'000'000);
gpio_set_function(DC, GPIO_FUNC_SIO);
gpio_set_dir(DC, GPIO_OUT);
gpio_set_function(CS, GPIO_FUNC_SIO);
gpio_set_dir(CS, GPIO_OUT);
gpio_put(CS, 1);
gpio_set_function(RESET, GPIO_FUNC_SIO);
gpio_set_dir(RESET, GPIO_OUT);
gpio_put(RESET, 1);
gpio_set_function(BUSY, GPIO_FUNC_SIO);
gpio_set_dir(BUSY, GPIO_IN);
gpio_set_pulls(BUSY, true, false);
gpio_set_function(SCK, GPIO_FUNC_SPI);
gpio_set_function(MOSI, GPIO_FUNC_SPI);
setup();
};
void UC8151::setup(uint8_t speed) {
reset();
if(speed == 0) {
command(PSR, {
RES_128x296 | LUT_OTP | FORMAT_BW | SHIFT_RIGHT | BOOSTER_ON | RESET_NONE
});
} else {
command(PSR, {
RES_128x296 | LUT_REG | FORMAT_BW | SHIFT_RIGHT | BOOSTER_ON | RESET_NONE
});
}
switch(speed) {
case 0:
// Note: the defult luts are built in so we don't really need to flash them here
// they are preserved above for posterity and reference mostly.
break;
case 1:
medium_luts();
break;
case 2:
fast_luts();
break;
case 3:
turbo_luts();
break;
default:
break;
}
command(PWR, {
VDS_INTERNAL | VDG_INTERNAL,
VCOM_VD | VGHL_16V,
0b101011,
0b101011,
0b101011
});
command(PON); // power on
busy_wait();
// booster soft start configuration
command(BTST, {
START_10MS | STRENGTH_3 | OFF_6_58US,
START_10MS | STRENGTH_3 | OFF_6_58US,
START_10MS | STRENGTH_3 | OFF_6_58US
});
command(PFS, {
FRAMES_1
});
command(TSE, {
TEMP_INTERNAL | OFFSET_0
});
command(TCON, {0x22}); // tcon setting
command(CDI, {0b01'00'1100}); // vcom and data interval
command(PLL, {
HZ_100
});
command(POF);
busy_wait();
}
void UC8151::power_off() {
command(POF);
}
void UC8151::read(uint8_t reg, size_t len, uint8_t *data) {
gpio_put(CS, 0);
gpio_put(DC, 0); // command mode
spi_write_blocking(spi, &reg, 1);
if(len > 0) {
gpio_put(DC, 1); // data mode
gpio_set_function(SCK, GPIO_FUNC_SIO);
gpio_set_dir(SCK, GPIO_OUT);
gpio_set_function(MOSI, GPIO_FUNC_SIO);
gpio_set_dir(MOSI, GPIO_IN);
for(auto i = 0u; i < len; i++) {
int byte = i / 8;
int bit = i % 8;
gpio_put(SCK, true);
bool value = gpio_get(MOSI);
data[byte] |= value << (7-bit);
gpio_put(SCK, false);
}
gpio_set_function(SCK, GPIO_FUNC_SPI);
gpio_set_function(MOSI, GPIO_FUNC_SPI);
}
gpio_put(CS, 1);
}
void UC8151::command(uint8_t reg, size_t len, const uint8_t *data) {
gpio_put(CS, 0);
gpio_put(DC, 0); // command mode
spi_write_blocking(spi, &reg, 1);
if(len > 0) {
gpio_put(DC, 1); // data mode
spi_write_blocking(spi, (const uint8_t*)data, len);
}
gpio_put(CS, 1);
}
void UC8151::data(size_t len, const uint8_t *data) {
gpio_put(CS, 0);
gpio_put(DC, 1); // data mode
spi_write_blocking(spi, (const uint8_t*)data, len);
gpio_put(CS, 1);
}
void UC8151::command(uint8_t reg, std::initializer_list<uint8_t> values) {
command(reg, values.size(), (uint8_t *)values.begin());
}
void UC8151::pixel(int x, int y, int v) {
// bounds check
if(x < 0 || y < 0 || x >= width || y >= height) return;
// pointer to byte in framebuffer that contains this pixel
uint8_t *p = &frame_buffer[(y / 8) + (x * (height / 8))];
uint8_t o = 7 - (y & 0b111); // bit offset within byte
uint8_t m = ~(1 << o); // bit mask for byte
uint8_t b = (v == 0 ? 0 : 1) << o; // bit value shifted to position
*p &= m; // clear bit
*p |= b; // set bit value
}
void UC8151::update_speed(uint8_t speed) {
setup(speed);
}
void UC8151::partial_update(int x, int y, int w, int h, bool blocking) {
// y is given in columns ("banks"), which are groups of 8 horiontal pixels
// x is given in pixels
if(blocking) {
busy_wait();
}
int cols = h / 8;
int y1 = y / 8;
//int y2 = y1 + cols;
int rows = w;
int x1 = x;
//int x2 = x + rows;
uint8_t partial_window[7] = {
(uint8_t)(y),
(uint8_t)(y + h - 1),
(uint8_t)(x >> 8),
(uint8_t)(x & 0xff),
(uint8_t)((x + w - 1) >> 8),
(uint8_t)((x + w - 1) & 0xff),
0b00000001 // PT_SCAN
};
command(PON); // turn on
command(PTIN); // enable partial mode
command(PTL, sizeof(partial_window), partial_window);
command(DTM2);
for (auto dx = 0; dx < rows; dx++) {
int sx = dx + x1;
int sy = y1;
data(cols, &frame_buffer[sy + (sx * (height / 8))]);
}
command(DSP); // data stop
command(DRF); // start display refresh
if(blocking) {
busy_wait();
command(POF); // turn off
}
}
void UC8151::update(bool blocking) {
if(blocking) {
busy_wait();
}
command(PON); // turn on
command(PTOU); // disable partial mode
command(DTM2, (width * height) / 8, frame_buffer); // transmit framebuffer
command(DSP); // data stop
command(DRF); // start display refresh
if(blocking) {
busy_wait();
command(POF); // turn off
}
}
void UC8151::off() {
busy_wait();
command(POF); // turn off
}
}
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