287 lines
9.1 KiB
C
287 lines
9.1 KiB
C
/* vim: set ai et ts=4 sw=4: */
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#include <stdint.h>
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#include "gpio.h"
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#include "spi.h"
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#include "st7735.h"
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#define DELAY 0x80
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// based on Adafruit ST7735 library for Arduino
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static const uint8_t
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init_cmds1[] = { // Init for 7735R, part 1 (red or green tab)
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15, // 15 commands in list:
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ST7735_SWRESET, DELAY, // 1: Software reset, 0 args, w/delay
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150, // 150 ms delay
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ST7735_SLPOUT, DELAY, // 2: Out of sleep mode, 0 args, w/delay
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255, // 500 ms delay
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ST7735_FRMCTR1, 3, // 3: Frame rate ctrl - normal mode, 3 args:
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0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D)
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ST7735_FRMCTR2, 3, // 4: Frame rate control - idle mode, 3 args:
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0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D)
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ST7735_FRMCTR3, 6, // 5: Frame rate ctrl - partial mode, 6 args:
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0x01, 0x2C, 0x2D, // Dot inversion mode
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0x01, 0x2C, 0x2D, // Line inversion mode
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ST7735_INVCTR, 1, // 6: Display inversion ctrl, 1 arg, no delay:
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0x07, // No inversion
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ST7735_PWCTR1, 3, // 7: Power control, 3 args, no delay:
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0xA2,
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0x02, // -4.6V
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0x84, // AUTO mode
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ST7735_PWCTR2, 1, // 8: Power control, 1 arg, no delay:
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0xC5, // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD
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ST7735_PWCTR3, 2, // 9: Power control, 2 args, no delay:
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0x0A, // Opamp current small
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0x00, // Boost frequency
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ST7735_PWCTR4, 2, // 10: Power control, 2 args, no delay:
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0x8A, // BCLK/2, Opamp current small & Medium low
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0x2A,
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ST7735_PWCTR5, 2, // 11: Power control, 2 args, no delay:
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0x8A, 0xEE,
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ST7735_VMCTR1, 1, // 12: Power control, 1 arg, no delay:
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0x0E,
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ST7735_INVOFF, 0, // 13: Don't invert display, no args, no delay
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ST7735_MADCTL, 1, // 14: Memory access control (directions), 1 arg:
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ST7735_ROTATION, // row addr/col addr, bottom to top refresh
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ST7735_COLMOD, 1, // 15: set color mode, 1 arg, no delay:
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0x05}, // 16-bit color
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#if (defined(ST7735_IS_128X128) || defined(ST7735_IS_160X128))
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init_cmds2[] = { // Init for 7735R, part 2 (1.44" display)
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2, // 2 commands in list:
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ST7735_CASET, 4, // 1: Column addr set, 4 args, no delay:
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0x00, 0x00, // XSTART = 0
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0x00, 0x7F, // XEND = 127
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ST7735_RASET, 4, // 2: Row addr set, 4 args, no delay:
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0x00, 0x00, // XSTART = 0
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0x00, 0x7F}, // XEND = 127
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#endif // ST7735_IS_128X128
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#ifdef ST7735_IS_160X80
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init_cmds2[] = { // Init for 7735S, part 2 (160x80 display)
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3, // 3 commands in list:
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ST7735_CASET, 4, // 1: Column addr set, 4 args, no delay:
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0x00, 0x00, // XSTART = 0
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0x00, 0x4F, // XEND = 79
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ST7735_RASET, 4, // 2: Row addr set, 4 args, no delay:
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0x00, 0x00, // XSTART = 0
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0x00, 0x9F, // XEND = 159
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ST7735_INVOFF, 0}, // 3: Invert colors
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#endif
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init_cmds3[] = { // Init for 7735R, part 3 (red or green tab)
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4, // 4 commands in list:
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ST7735_GMCTRP1, 16, // 1: Magical unicorn dust, 16 args, no delay:
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0x02, 0x1c, 0x07, 0x12, 0x37, 0x32, 0x29, 0x2d, 0x29, 0x25, 0x2B, 0x39, 0x00, 0x01, 0x03, 0x10, ST7735_GMCTRN1, 16, // 2: Sparkles and rainbows, 16 args, no delay:
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0x03, 0x1d, 0x07, 0x06, 0x2E, 0x2C, 0x29, 0x2D, 0x2E, 0x2E, 0x37, 0x3F, 0x00, 0x00, 0x02, 0x10, ST7735_NORON, DELAY, // 3: Normal display on, no args, w/delay
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10, // 10 ms delay
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ST7735_DISPON, DELAY, // 4: Main screen turn on, no args w/delay
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100}; // 100 ms delay
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static void ST7735_Select()
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{
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HAL_GPIO_WritePin(ST7735_CS_GPIO_Port, ST7735_CS_Pin, GPIO_PIN_RESET);
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}
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void ST7735_Unselect()
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{
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HAL_GPIO_WritePin(ST7735_CS_GPIO_Port, ST7735_CS_Pin, GPIO_PIN_SET);
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}
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static void ST7735_Reset()
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{
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HAL_GPIO_WritePin(ST7735_RES_GPIO_Port, ST7735_RES_Pin, GPIO_PIN_RESET);
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HAL_Delay(5);
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HAL_GPIO_WritePin(ST7735_RES_GPIO_Port, ST7735_RES_Pin, GPIO_PIN_SET);
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}
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static void ST7735_WriteCommand(uint8_t cmd)
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{
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HAL_GPIO_WritePin(ST7735_DC_GPIO_Port, ST7735_DC_Pin, GPIO_PIN_RESET);
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HAL_SPI_Transmit(&ST7735_SPI_PORT, &cmd, sizeof(cmd), HAL_MAX_DELAY);
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// SPI_Write(&cmd, sizeof(cmd));
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}
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static void ST7735_WriteData(uint8_t *buff, size_t buff_size)
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{
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HAL_GPIO_WritePin(ST7735_DC_GPIO_Port, ST7735_DC_Pin, GPIO_PIN_SET);
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HAL_SPI_Transmit(&ST7735_SPI_PORT, buff, buff_size, HAL_MAX_DELAY);
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// SPI_Write(buff, buff_size);
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}
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static void ST7735_ExecuteCommandList(const uint8_t *addr)
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{
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uint8_t numCommands, numArgs;
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uint16_t ms;
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numCommands = *addr++;
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while (numCommands--)
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{
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uint8_t cmd = *addr++;
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ST7735_WriteCommand(cmd);
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numArgs = *addr++;
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// If high bit set, delay follows args
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ms = numArgs & DELAY;
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numArgs &= ~DELAY;
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if (numArgs)
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{
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ST7735_WriteData((uint8_t *)addr, numArgs);
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addr += numArgs;
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}
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if (ms)
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{
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ms = *addr++;
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if (ms == 255)
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ms = 500;
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HAL_Delay(ms);
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}
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}
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}
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static void ST7735_SetAddressWindow(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1)
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{
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// column address set
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ST7735_WriteCommand(ST7735_CASET);
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uint8_t data[] = {0x00, x0 + ST7735_XSTART, 0x00, x1 + ST7735_XSTART};
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ST7735_WriteData(data, sizeof(data));
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// row address set
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ST7735_WriteCommand(ST7735_RASET);
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data[1] = y0 + ST7735_YSTART;
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data[3] = y1 + ST7735_YSTART;
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ST7735_WriteData(data, sizeof(data));
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}
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void ST7735_Init()
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{
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ST7735_Select();
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ST7735_Reset();
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ST7735_ExecuteCommandList(init_cmds1);
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ST7735_ExecuteCommandList(init_cmds2);
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ST7735_ExecuteCommandList(init_cmds3);
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ST7735_Unselect();
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}
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void ST7735_DrawPixel(uint16_t x, uint16_t y, uint16_t color) //画点
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{
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if ((x >= ST7735_WIDTH) || (y >= ST7735_HEIGHT))
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return;
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ST7735_Select();
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ST7735_SetAddressWindow(x, y, x + 1, y + 1);
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ST7735_WriteCommand(ST7735_RAMWR);
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uint8_t data[] = {color >> 8, color & 0xFF};
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ST7735_WriteData(data, sizeof(data));
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ST7735_Unselect();
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}
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void ST7735_DrawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1,uint16_t color) //画线
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{
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int16_t temp;
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int16_t steep = abs(y1 - y0) > abs(x1 - x0);
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if (steep) {
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temp = x0;
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x0 = y0;
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y0 = temp;
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temp = x1;
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x0 = y1;
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y1 = temp;
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}
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if (x0 > x1) {
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temp = x1;
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x1 = x0;
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x0 = temp;
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temp = y1;
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y1 = y0;
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y0 = temp;
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}
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int16_t dx, dy;
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dx = x1 - x0;
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dy = abs(y1 - y0);
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int16_t err = dx / 2;
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int16_t ystep;
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if (y0 < y1) {
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ystep = 1;
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} else {
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ystep = -1;
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}
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for (; x0 <= x1; x0++) {
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if (steep) {
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ST7735_DrawPixel(y0, x0, color);
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} else {
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ST7735_DrawPixel(x0, y0, color);
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}
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err -= dy;
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if (err < 0) {
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y0 += ystep;
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err += dx;
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}
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}
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}
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void ST7735_FillRectangle(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color) //矩形填充
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{
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// clipping
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if ((x >= ST7735_WIDTH) || (y >= ST7735_HEIGHT))
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return;
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if ((x + w - 1) >= ST7735_WIDTH)
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w = ST7735_WIDTH - x;
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if ((y + h - 1) >= ST7735_HEIGHT)
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h = ST7735_HEIGHT - y;
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ST7735_Select();
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ST7735_SetAddressWindow(x, y, x + w - 1, y + h - 1);
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ST7735_WriteCommand(ST7735_RAMWR);
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uint8_t data[] = {color >> 8, color & 0xFF};
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HAL_GPIO_WritePin(ST7735_DC_GPIO_Port, ST7735_DC_Pin, GPIO_PIN_SET);
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for (y = h; y > 0; y--)
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{
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for (x = w; x > 0; x--)
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{
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HAL_SPI_Transmit(&ST7735_SPI_PORT, data, sizeof(data), HAL_MAX_DELAY);
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// SPI_Write(data, sizeof(data));
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}
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}
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ST7735_Unselect();
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}
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void ST7735_FillScreen(uint16_t color) //全屏填充
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{
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ST7735_FillRectangle(0, 0, ST7735_WIDTH, ST7735_HEIGHT, color);
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}
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void ST7735_DrawImage(uint16_t x, uint16_t y, uint16_t w, uint16_t h, const uint16_t *data) //画图像
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{
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if ((x >= ST7735_WIDTH) || (y >= ST7735_HEIGHT))
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return;
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if ((x + w - 1) >= ST7735_WIDTH)
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return;
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if ((y + h - 1) >= ST7735_HEIGHT)
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return;
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ST7735_Select();
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ST7735_SetAddressWindow(x, y, x + w - 1, y + h - 1);
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ST7735_WriteCommand(ST7735_RAMWR);
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ST7735_WriteData((uint8_t *)data, sizeof(uint16_t) * w * h);
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ST7735_Unselect();
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}
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void ST7735_InvertColors(bool invert) //反转颜色
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{
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ST7735_Select();
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ST7735_WriteCommand(invert ? ST7735_INVON : ST7735_INVOFF);
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ST7735_Unselect();
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}
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