Started porting arduino library
This commit is contained in:
commit
1af8221120
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-I../sss7core
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-I/usr/avr/include
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-D__AVR_ATmega8__
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-DF_CPU=16000000
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-Os
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@ -0,0 +1,11 @@
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#include "spi.h"
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void SPI_init(void) {
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// Set MOSI and SCK, SS/CS output, all others input
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DDRB = (1<<PB3) | (1<<PB5) | (1<<PB2);
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// Enable SPI, Master, set clock rate fck/4, mode 0,
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SPCR = (1<<SPE) | (1<<MSTR);
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// Set SS/CS
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PORTB |= (1 << PB2);
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}
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#ifndef _SPI_H_
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#define _SPI_H_
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#include<avr/io.h>
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void SPI_init(void);
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static inline void spi_write(uint8_t byte) {
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SPDR = byte;
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while(!(SPSR & (1<<SPIF)));
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}
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static inline void spi_set_cs() {
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PORTB |= (1 << PB2);
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}
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static inline void spi_unset_cs() {
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PORTB &= ~(1 << PB2);
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}
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#endif
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#include "st7735.h"
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#include <util/delay.h>
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#include <avr/pgmspace.h>
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#include "spi.h"
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#include "st7735initcmds.h"
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static unit8_t st7735_row_start = 0;
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static unit8_t st7735_column_start = 0;
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static uint8_t st7735_height = st7735_height_18;
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static inline void st7735_set_rs() {
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PORTB |= (1 << PB1);
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}
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static inline void st7735_unset_rs() {
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PORTB &= ~(1 << PB1);
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}
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static inline void st7735_set_rst() {
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PORTB |= (1 << PB0);
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}
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static inline void st7735_unset_rst() {
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PORTB &= ~(1 << PB0);
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}
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static inline void st7735_write_cmd(enum ST7735_COMMANDS cmd) {
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st7735_unset_rs();
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spi_unset_cs();
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spi_write(cmd);
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spi_set_cs();
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}
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static inline void st7735_write_data(enum ST7735_COMMANDS cmd) {
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st7735_set_rs();
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spi_unset_cs();
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spi_write(cmd);
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spi_set_cs();
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}
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static inline void st7735_reset() {
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spi_unset_cs();
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st7735_set_rst();
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_delay_ms(500);
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st7735_unset_rst();
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_delay_ms(500);
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st7735_set_rst();
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_delay_ms(500);
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}
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void st7735_run_command_list(const uint8_t *addr) {
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uint8_t cmd_count, arg_count, has_delay;
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cmd_count = pgm_read_byte(addr++); // Number of commands to follow
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for(uint8_t cmd_pos = 0; cmd_pos < cmd_count; cmd_pos++) {
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st7735_write_cmd(pgm_read_byte(addr++)); // Read, send command
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arg_count = pgm_read_byte(addr++); // Number of args to follow
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has_delay = arg_count & DELAY_FLAG; // If set, delay follows args
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arg_count &= ~DELAY_FLAG; // Number of args
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for(uint8_t arg_pos = 0; arg_pos < arg_count; arg_pos++) { // For each argument...
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st7735_write_data(pgm_read_byte(addr++)); // Read, send argument
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}
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if(has_delay) {
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uint8_t ms;
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ms = pgm_read_byte(addr++); // Read post-command delay time (ms)
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if(ms == 255) { // If 255, delay for 500 ms
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_delay_ms(500);
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}
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else {
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_delay_ms(ms);
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}
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}
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}
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}
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void st7735_init() {
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// Set rs and rst output
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DDRB |= (1 << PB1) | (1 << PB0);
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st7735_reset();
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switch(st7735_type) {
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case ST7735_BLUE:
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st7735_run_command_list(st7735_blue_init);
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break;
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case ST7735_RED_18_GREENTAB:
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st7735_run_command_list(st7735_red_init1);
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st7735_run_command_list(st7735_red_init_green2);
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st7735_run_command_list(st7735_red_init3);
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st7735_column_start = 2;
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st7735_row_start = 1;
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break;
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case ST7735_RED_18_REDTAB:
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st7735_run_command_list(st7735_red_init1);
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st7735_run_command_list(st7735_red_init_red2);
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st7735_run_command_list(st7735_red_init3);
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break;
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case ST7735_RED_18_BLACKTAB:
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st7735_run_command_list(st7735_red_init1);
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st7735_run_command_list(st7735_red_init_red2);
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st7735_run_command_list(st7735_red_init3);
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// Change MADCTL color filter for black
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st7735_write_cmd(ST7735_MADCTL);
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st7735_write_data(0xC0);
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break;
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case ST7735_RED144_GREENTAB:
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st7735_run_command_list(st7735_red_init1);
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st7735_run_command_list(st7735_red_init_green1442);
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st7735_run_command_list(st7735_red_init3);
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st7735_height = st7735_height_144;
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st7735_column_start = 2;
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st7735_row_start = 3;
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break;
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}
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}
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@ -0,0 +1,85 @@
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#ifndef _ST7735_H_
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#define _ST7735_H_
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#include<stdint.h>
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const uint8_t st7735_width = 128;
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// for 1.44" display
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const uint8_t st7735_height_144 = 128;
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// for 1.8" display
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const uint8_t st7735_height_18 = 160;
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enum ST7735_DISPLAY_TYPE {
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ST7735_BLUE,
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ST7735_RED_18_GREENTAB,
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ST7735_RED_18_REDTAB,
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ST7735_RED_18_BLACKTAB,
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ST7735_RED144_GREENTAB
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};
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const enum ST7735_DISPLAY_TYPE st7735_type = ST7735_RED_18_REDTAB;
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// ST7735 commands
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enum ST7735_COMMANDS {
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ST7735_NOP = 0x00,
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ST7735_SWRESET = 0x01,
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ST7735_RDDID = 0x04,
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ST7735_RDDST = 0x09,
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ST7735_SLPIN = 0x10,
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ST7735_SLPOUT = 0x11,
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ST7735_PTLON = 0x12,
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ST7735_NORON = 0x13,
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ST7735_INVOFF = 0x20,
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ST7735_INVON = 0x21,
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ST7735_DISPOFF = 0x28,
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ST7735_DISPON = 0x29,
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ST7735_CASET = 0x2A,
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ST7735_RASET = 0x2B,
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ST7735_RAMWR = 0x2C,
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ST7735_RAMRD = 0x2E,
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ST7735_PTLAR = 0x30,
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ST7735_COLMOD = 0x3A,
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ST7735_MADCTL = 0x36,
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ST7735_FRMCTR1 = 0xB1,
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ST7735_FRMCTR2 = 0xB2,
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ST7735_FRMCTR3 = 0xB3,
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ST7735_INVCTR = 0xB4,
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ST7735_DISSET5 = 0xB6,
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ST7735_PWCTR1 = 0xC0,
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ST7735_PWCTR2 = 0xC1,
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ST7735_PWCTR3 = 0xC2,
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ST7735_PWCTR4 = 0xC3,
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ST7735_PWCTR5 = 0xC4,
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ST7735_VMCTR1 = 0xC5,
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ST7735_RDID1 = 0xDA,
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ST7735_RDID2 = 0xDB,
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ST7735_RDID3 = 0xDC,
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ST7735_RDID4 = 0xDD,
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ST7735_PWCTR6 = 0xFC,
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ST7735_GMCTRP1 = 0xE0,
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ST7735_GMCTRN1 = 0xE1
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};
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enum ST7735_COLORS {
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ST7735_COLOR_BLACK = 0x0000,
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ST7735_COLOR_BLUE = 0x001F,
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ST7735_COLOR_RED = 0xF800,
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ST7735_COLOR_GREEN = 0x07E0,
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ST7735_COLOR_CYAN = 0x07FF,
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ST7735_COLOR_MAGENTA = 0xF81F,
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ST7735_COLOR_YELLOW = 0xFFE0,
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ST7735_COLOR_WHITE = 0xFFFF
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};
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void st7735_init(void);
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#endif
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@ -0,0 +1,156 @@
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#ifndef _ST7735INITCMDS_H_
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#define _ST7735INITCMDS_H_
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#include <avr/pgmspace.h>
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#include "st7735.h"
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const uint8_t DELAY_FLAG = (1 << 7);
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static const uint8_t PROGMEM st7735_blue_init[] = { // Initialization commands for 7735B screens
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18, // 18 commands in list:
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ST7735_SWRESET, DELAY_FLAG, // 1: Software reset, no args, w/delay
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50, // 50 ms delay
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ST7735_SLPOUT, DELAY_FLAG, // 2: Out of sleep mode, no args, w/delay
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255, // 255 = 500 ms delay
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ST7735_COLMOD, 1 | DELAY_FLAG, // 3: Set color mode, 1 arg + delay:
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0x05, // 16-bit color
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10, // 10 ms delay
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ST7735_FRMCTR1, 3 | DELAY_FLAG, // 4: Frame rate control, 3 args + delay:
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0x00, // fastest refresh
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0x06, // 6 lines front porch
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0x03, // 3 lines back porch
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10, // 10 ms delay
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ST7735_MADCTL, 1, // 5: Memory access ctrl (directions), 1 arg:
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0x08, // Row addr/col addr, bottom to top refresh
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ST7735_DISSET5, 2, // 6: Display settings #5, 2 args, no delay:
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0x15, // 1 clk cycle nonoverlap, 2 cycle gate
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// rise, 3 cycle osc equalize
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0x02, // Fix on VTL
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ST7735_INVCTR, 1, // 7: Display inversion control, 1 arg:
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0x0, // Line inversion
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ST7735_PWCTR1, 2 | DELAY_FLAG, // 8: Power control, 2 args + delay:
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0x02, // GVDD = 4.7V
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0x70, // 1.0uA
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10, // 10 ms delay
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ST7735_PWCTR2, 1, // 9: Power control, 1 arg, no delay:
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0x05, // VGH = 14.7V, VGL = -7.35V
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ST7735_PWCTR3, 2, // 10: Power control, 2 args, no delay:
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0x01, // Opamp current small
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0x02, // Boost frequency
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ST7735_VMCTR1, 2 | DELAY_FLAG, // 11: Power control, 2 args + delay:
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0x3C, // VCOMH = 4V
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0x38, // VCOML = -1.1V
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10, // 10 ms delay
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ST7735_PWCTR6, 2, // 12: Power control, 2 args, no delay:
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0x11, 0x15,
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ST7735_GMCTRP1, 16, // 13: Magical unicorn dust, 16 args, no delay:
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0x09, 0x16, 0x09, 0x20, // (seriously though, not sure what
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0x21, 0x1B, 0x13, 0x19, // these config values represent)
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0x17, 0x15, 0x1E, 0x2B,
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0x04, 0x05, 0x02, 0x0E,
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ST7735_GMCTRN1, 16 | DELAY_FLAG,// 14: Sparkles and rainbows, 16 args + delay:
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0x0B, 0x14, 0x08, 0x1E, // (ditto)
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0x22, 0x1D, 0x18, 0x1E,
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0x1B, 0x1A, 0x24, 0x2B,
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0x06, 0x06, 0x02, 0x0F,
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10, // 10 ms delay
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ST7735_CASET, 4, // 15: Column addr set, 4 args, no delay:
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0x00, 0x02, // XSTART = 2
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0x00, 0x81, // XEND = 129
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ST7735_RASET, 4, // 16: Row addr set, 4 args, no delay:
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0x00, 0x02, // XSTART = 1
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0x00, 0x81, // XEND = 160
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ST7735_NORON, DELAY_FLAG, // 17: Normal display on, no args, w/delay
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10, // 10 ms delay
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ST7735_DISPON, DELAY_FLAG, // 18: Main screen turn on, no args, w/delay
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255 // 255 = 500 ms delay
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};
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static const uint8_t PROGMEM st7735_red_init1[] = { // 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_FLAG, // 1: Software reset, 0 args, w/delay
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150, // 150 ms delay
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ST7735_SLPOUT, DELAY_FLAG, // 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)
|
||||
ST7735_FRMCTR3, 6, // 5: Frame rate ctrl - partial mode, 6 args:
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||||
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
|
||||
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Reference in New Issue