From 1af822112095c283220baca655d86b3bac4a9df7 Mon Sep 17 00:00:00 2001 From: LongHairedHacker Date: Mon, 5 Dec 2016 14:56:09 +0100 Subject: [PATCH] Started porting arduino library --- .clang_complete | 5 ++ spi.c | 11 ++++ spi.h | 22 +++++++ st7735.c | 131 +++++++++++++++++++++++++++++++++++++++ st7735.h | 85 ++++++++++++++++++++++++++ st7735initcmds.h | 156 +++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 410 insertions(+) create mode 100644 .clang_complete create mode 100644 spi.c create mode 100644 spi.h create mode 100644 st7735.c create mode 100644 st7735.h create mode 100644 st7735initcmds.h diff --git a/.clang_complete b/.clang_complete new file mode 100644 index 0000000..171341a --- /dev/null +++ b/.clang_complete @@ -0,0 +1,5 @@ +-I../sss7core +-I/usr/avr/include +-D__AVR_ATmega8__ +-DF_CPU=16000000 +-Os diff --git a/spi.c b/spi.c new file mode 100644 index 0000000..6b9dac0 --- /dev/null +++ b/spi.c @@ -0,0 +1,11 @@ +#include "spi.h" + +void SPI_init(void) { + // Set MOSI and SCK, SS/CS output, all others input + DDRB = (1< + +void SPI_init(void); + +static inline void spi_write(uint8_t byte) { + SPDR = byte; + while(!(SPSR & (1< +#include + +#include "spi.h" +#include "st7735initcmds.h" + +static unit8_t st7735_row_start = 0; +static unit8_t st7735_column_start = 0; +static uint8_t st7735_height = st7735_height_18; + +static inline void st7735_set_rs() { + PORTB |= (1 << PB1); +} + +static inline void st7735_unset_rs() { + PORTB &= ~(1 << PB1); +} + +static inline void st7735_set_rst() { + PORTB |= (1 << PB0); +} + +static inline void st7735_unset_rst() { + PORTB &= ~(1 << PB0); +} + + +static inline void st7735_write_cmd(enum ST7735_COMMANDS cmd) { + st7735_unset_rs(); + + spi_unset_cs(); + spi_write(cmd); + spi_set_cs(); +} + +static inline void st7735_write_data(enum ST7735_COMMANDS cmd) { + st7735_set_rs(); + + spi_unset_cs(); + spi_write(cmd); + spi_set_cs(); +} + + +static inline void st7735_reset() { + spi_unset_cs(); + st7735_set_rst(); + _delay_ms(500); + st7735_unset_rst(); + _delay_ms(500); + st7735_set_rst(); + _delay_ms(500); +} + + +void st7735_run_command_list(const uint8_t *addr) { + uint8_t cmd_count, arg_count, has_delay; + + cmd_count = pgm_read_byte(addr++); // Number of commands to follow + for(uint8_t cmd_pos = 0; cmd_pos < cmd_count; cmd_pos++) { + st7735_write_cmd(pgm_read_byte(addr++)); // Read, send command + arg_count = pgm_read_byte(addr++); // Number of args to follow + has_delay = arg_count & DELAY_FLAG; // If set, delay follows args + arg_count &= ~DELAY_FLAG; // Number of args + for(uint8_t arg_pos = 0; arg_pos < arg_count; arg_pos++) { // For each argument... + st7735_write_data(pgm_read_byte(addr++)); // Read, send argument + } + + if(has_delay) { + uint8_t ms; + ms = pgm_read_byte(addr++); // Read post-command delay time (ms) + if(ms == 255) { // If 255, delay for 500 ms + _delay_ms(500); + } + else { + _delay_ms(ms); + } + + } + } +} + + +void st7735_init() { + // Set rs and rst output + DDRB |= (1 << PB1) | (1 << PB0); + + st7735_reset(); + + switch(st7735_type) { + case ST7735_BLUE: + st7735_run_command_list(st7735_blue_init); + break; + + case ST7735_RED_18_GREENTAB: + st7735_run_command_list(st7735_red_init1); + st7735_run_command_list(st7735_red_init_green2); + st7735_run_command_list(st7735_red_init3); + st7735_column_start = 2; + st7735_row_start = 1; + break; + + case ST7735_RED_18_REDTAB: + st7735_run_command_list(st7735_red_init1); + st7735_run_command_list(st7735_red_init_red2); + st7735_run_command_list(st7735_red_init3); + break; + + case ST7735_RED_18_BLACKTAB: + st7735_run_command_list(st7735_red_init1); + st7735_run_command_list(st7735_red_init_red2); + st7735_run_command_list(st7735_red_init3); + // Change MADCTL color filter for black + st7735_write_cmd(ST7735_MADCTL); + st7735_write_data(0xC0); + break; + + case ST7735_RED144_GREENTAB: + st7735_run_command_list(st7735_red_init1); + st7735_run_command_list(st7735_red_init_green1442); + st7735_run_command_list(st7735_red_init3); + st7735_height = st7735_height_144; + st7735_column_start = 2; + st7735_row_start = 3; + break; + } + + +} diff --git a/st7735.h b/st7735.h new file mode 100644 index 0000000..fa170dc --- /dev/null +++ b/st7735.h @@ -0,0 +1,85 @@ +#ifndef _ST7735_H_ +#define _ST7735_H_ + +#include + +const uint8_t st7735_width = 128; +// for 1.44" display +const uint8_t st7735_height_144 = 128; +// for 1.8" display +const uint8_t st7735_height_18 = 160; + +enum ST7735_DISPLAY_TYPE { + ST7735_BLUE, + ST7735_RED_18_GREENTAB, + ST7735_RED_18_REDTAB, + ST7735_RED_18_BLACKTAB, + ST7735_RED144_GREENTAB +}; + +const enum ST7735_DISPLAY_TYPE st7735_type = ST7735_RED_18_REDTAB; + + +// ST7735 commands +enum ST7735_COMMANDS { + ST7735_NOP = 0x00, + ST7735_SWRESET = 0x01, + ST7735_RDDID = 0x04, + ST7735_RDDST = 0x09, + + ST7735_SLPIN = 0x10, + ST7735_SLPOUT = 0x11, + ST7735_PTLON = 0x12, + ST7735_NORON = 0x13, + + ST7735_INVOFF = 0x20, + ST7735_INVON = 0x21, + ST7735_DISPOFF = 0x28, + ST7735_DISPON = 0x29, + ST7735_CASET = 0x2A, + ST7735_RASET = 0x2B, + ST7735_RAMWR = 0x2C, + ST7735_RAMRD = 0x2E, + + ST7735_PTLAR = 0x30, + ST7735_COLMOD = 0x3A, + ST7735_MADCTL = 0x36, + + ST7735_FRMCTR1 = 0xB1, + ST7735_FRMCTR2 = 0xB2, + ST7735_FRMCTR3 = 0xB3, + ST7735_INVCTR = 0xB4, + ST7735_DISSET5 = 0xB6, + + ST7735_PWCTR1 = 0xC0, + ST7735_PWCTR2 = 0xC1, + ST7735_PWCTR3 = 0xC2, + ST7735_PWCTR4 = 0xC3, + ST7735_PWCTR5 = 0xC4, + ST7735_VMCTR1 = 0xC5, + + ST7735_RDID1 = 0xDA, + ST7735_RDID2 = 0xDB, + ST7735_RDID3 = 0xDC, + ST7735_RDID4 = 0xDD, + + ST7735_PWCTR6 = 0xFC, + + ST7735_GMCTRP1 = 0xE0, + ST7735_GMCTRN1 = 0xE1 +}; + +enum ST7735_COLORS { + ST7735_COLOR_BLACK = 0x0000, + ST7735_COLOR_BLUE = 0x001F, + ST7735_COLOR_RED = 0xF800, + ST7735_COLOR_GREEN = 0x07E0, + ST7735_COLOR_CYAN = 0x07FF, + ST7735_COLOR_MAGENTA = 0xF81F, + ST7735_COLOR_YELLOW = 0xFFE0, + ST7735_COLOR_WHITE = 0xFFFF +}; + +void st7735_init(void); + +#endif diff --git a/st7735initcmds.h b/st7735initcmds.h new file mode 100644 index 0000000..750745b --- /dev/null +++ b/st7735initcmds.h @@ -0,0 +1,156 @@ +#ifndef _ST7735INITCMDS_H_ +#define _ST7735INITCMDS_H_ + +#include + +#include "st7735.h" + +const uint8_t DELAY_FLAG = (1 << 7); + +static const uint8_t PROGMEM st7735_blue_init[] = { // Initialization commands for 7735B screens + 18, // 18 commands in list: + ST7735_SWRESET, DELAY_FLAG, // 1: Software reset, no args, w/delay + 50, // 50 ms delay + ST7735_SLPOUT, DELAY_FLAG, // 2: Out of sleep mode, no args, w/delay + 255, // 255 = 500 ms delay + ST7735_COLMOD, 1 | DELAY_FLAG, // 3: Set color mode, 1 arg + delay: + 0x05, // 16-bit color + 10, // 10 ms delay + ST7735_FRMCTR1, 3 | DELAY_FLAG, // 4: Frame rate control, 3 args + delay: + 0x00, // fastest refresh + 0x06, // 6 lines front porch + 0x03, // 3 lines back porch + 10, // 10 ms delay + ST7735_MADCTL, 1, // 5: Memory access ctrl (directions), 1 arg: + 0x08, // Row addr/col addr, bottom to top refresh + ST7735_DISSET5, 2, // 6: Display settings #5, 2 args, no delay: + 0x15, // 1 clk cycle nonoverlap, 2 cycle gate + // rise, 3 cycle osc equalize + 0x02, // Fix on VTL + ST7735_INVCTR, 1, // 7: Display inversion control, 1 arg: + 0x0, // Line inversion + ST7735_PWCTR1, 2 | DELAY_FLAG, // 8: Power control, 2 args + delay: + 0x02, // GVDD = 4.7V + 0x70, // 1.0uA + 10, // 10 ms delay + ST7735_PWCTR2, 1, // 9: Power control, 1 arg, no delay: + 0x05, // VGH = 14.7V, VGL = -7.35V + ST7735_PWCTR3, 2, // 10: Power control, 2 args, no delay: + 0x01, // Opamp current small + 0x02, // Boost frequency + ST7735_VMCTR1, 2 | DELAY_FLAG, // 11: Power control, 2 args + delay: + 0x3C, // VCOMH = 4V + 0x38, // VCOML = -1.1V + 10, // 10 ms delay + ST7735_PWCTR6, 2, // 12: Power control, 2 args, no delay: + 0x11, 0x15, + ST7735_GMCTRP1, 16, // 13: Magical unicorn dust, 16 args, no delay: + 0x09, 0x16, 0x09, 0x20, // (seriously though, not sure what + 0x21, 0x1B, 0x13, 0x19, // these config values represent) + 0x17, 0x15, 0x1E, 0x2B, + 0x04, 0x05, 0x02, 0x0E, + ST7735_GMCTRN1, 16 | DELAY_FLAG,// 14: Sparkles and rainbows, 16 args + delay: + 0x0B, 0x14, 0x08, 0x1E, // (ditto) + 0x22, 0x1D, 0x18, 0x1E, + 0x1B, 0x1A, 0x24, 0x2B, + 0x06, 0x06, 0x02, 0x0F, + 10, // 10 ms delay + ST7735_CASET, 4, // 15: Column addr set, 4 args, no delay: + 0x00, 0x02, // XSTART = 2 + 0x00, 0x81, // XEND = 129 + ST7735_RASET, 4, // 16: Row addr set, 4 args, no delay: + 0x00, 0x02, // XSTART = 1 + 0x00, 0x81, // XEND = 160 + ST7735_NORON, DELAY_FLAG, // 17: Normal display on, no args, w/delay + 10, // 10 ms delay + ST7735_DISPON, DELAY_FLAG, // 18: Main screen turn on, no args, w/delay + 255 // 255 = 500 ms delay +}; + +static const uint8_t PROGMEM st7735_red_init1[] = { // Init for 7735R, part 1 (red or green tab) + 15, // 15 commands in list: + ST7735_SWRESET, DELAY_FLAG, // 1: Software reset, 0 args, w/delay + 150, // 150 ms delay + ST7735_SLPOUT, DELAY_FLAG, // 2: Out of sleep mode, 0 args, w/delay + 255, // 500 ms delay + ST7735_FRMCTR1, 3, // 3: Frame rate ctrl - normal mode, 3 args: + 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) + ST7735_FRMCTR2, 3, // 4: Frame rate control - idle mode, 3 args: + 0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D) + ST7735_FRMCTR3, 6, // 5: Frame rate ctrl - partial mode, 6 args: + 0x01, 0x2C, 0x2D, // Dot inversion mode + 0x01, 0x2C, 0x2D, // Line inversion mode + ST7735_INVCTR, 1, // 6: Display inversion ctrl, 1 arg, no delay: + 0x07, // No inversion + ST7735_PWCTR1, 3, // 7: Power control, 3 args, no delay: + 0xA2, + 0x02, // -4.6V + 0x84, // AUTO mode + ST7735_PWCTR2, 1, // 8: Power control, 1 arg, no delay: + 0xC5, // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD + ST7735_PWCTR3, 2, // 9: Power control, 2 args, no delay: + 0x0A, // Opamp current small + 0x00, // Boost frequency + ST7735_PWCTR4, 2, // 10: Power control, 2 args, no delay: + 0x8A, // BCLK/2, Opamp current small & Medium low + 0x2A, + ST7735_PWCTR5, 2, // 11: Power control, 2 args, no delay: + 0x8A, 0xEE, + ST7735_VMCTR1, 1, // 12: Power control, 1 arg, no delay: + 0x0E, + ST7735_INVOFF, 0, // 13: Don't invert display, no args, no delay + ST7735_MADCTL, 1, // 14: Memory access control (directions), 1 arg: + 0xC8, // row addr/col addr, bottom to top refresh + ST7735_COLMOD, 1, // 15: set color mode, 1 arg, no delay: + 0x05 // 16-bit color + }; + +static const uint8_t PROGMEM st7735_red_init_green2[] = { // Init for 7735R, part 2 (green tab only) + 2, // 2 commands in list: + ST7735_CASET, 4, // 1: Column addr set, 4 args, no delay: + 0x00, 0x02, // XSTART = 0 + 0x00, 0x7F+0x02, // XEND = 127 + ST7735_RASET, 4, // 2: Row addr set, 4 args, no delay: + 0x00, 0x01, // XSTART = 0 + 0x00, 0x9F+0x01 // XEND = 159 + }; + + static const uint8_t PROGMEM st7735_red_init_red2[] = { // Init for 7735R, part 2 (red tab only) + 2, // 2 commands in list: + ST7735_CASET, 4, // 1: Column addr set, 4 args, no delay: + 0x00, 0x00, // XSTART = 0 + 0x00, 0x7F, // XEND = 127 + ST7735_RASET, 4, // 2: Row addr set, 4 args, no delay: + 0x00, 0x00, // XSTART = 0 + 0x00, 0x9F, // XEND = 159 +}; + +static const uint8_t PROGMEM st7735_red_init_green1442[] = {// Init for 7735R, part 2 (green 1.44 tab) + 2, // 2 commands in list: + ST7735_CASET, 4, // 1: Column addr set, 4 args, no delay: + 0x00, 0x00, // XSTART = 0 + 0x00, 0x7F, // XEND = 127 + ST7735_RASET, 4, // 2: Row addr set, 4 args, no delay: + 0x00, 0x00, // XSTART = 0 + 0x00, 0x7F // XEND = 127 +}; + +static const uint8_t PROGMEM st7735_red_init3[] = { // Init for 7735R, part 3 (red or green tab) + 4, // 4 commands in list: + ST7735_GMCTRP1, 16, // 1: Magical unicorn dust, 16 args, no delay: + 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: + 0x03, 0x1d, 0x07, 0x06, + 0x2E, 0x2C, 0x29, 0x2D, + 0x2E, 0x2E, 0x37, 0x3F, + 0x00, 0x00, 0x02, 0x10, + ST7735_NORON, DELAY_FLAG, // 3: Normal display on, no args, w/delay + 10, // 10 ms delay + ST7735_DISPON, DELAY_FLAG, // 4: Main screen turn on, no args w/delay + 100 // 100 ms delay +}; + +#endif