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SD SPI implementation finished

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marqs committed 2016-10-21 01:19:53 +03:00
1 parent 71d60144e8
commit f55e9a877e
46 files changed
+2349 -3392
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software/sys_controller/spi_charlcd/lcd.c
+38 -46
View File
@@ -23,6 +23,7 @@
#include "alt_types.h"
#include "altera_avalon_pio_regs.h"
#include "i2c_opencores.h"
#include "av_controller.h"
#define LCD_CMD 0x00
#define LCD_DATA 0x40
@@ -30,50 +31,46 @@
#define WRDELAY 20
#define CLEARDELAY 800
extern alt_u8 sys_ctrl;
static void lcd_cmd(alt_u8 cmd, alt_u16 postdelay) {
SPI_write(I2CA_BASE, &cmd, 1);
usleep(postdelay);
}
void lcd_init()
{
alt_u8 lcd_ctrl = 0x00;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_5_BASE, lcd_ctrl);
sys_ctrl &= ~(LCD_CS_N|LCD_RS);
IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x38); // function set
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x39); // function set, select extended table (IS=1)
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x14); // osc freq
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x71); // contrast set
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x5E); // power/icon/cont
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x6D); // follower control
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x0C); // display on
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x01); // clear display
usleep(CLEARDELAY);
SPI_write(I2CA_BASE, 0x06); // entry mode set
usleep(WRDELAY);
SPI_write(I2CA_BASE, 0x02); // return home
usleep(CLEARDELAY);
lcd_cmd(0x38,WRDELAY); // function set
lcd_cmd(0x39,WRDELAY); // function set, select extended table (IS=1)
lcd_cmd(0x14,WRDELAY); // osc freq
lcd_cmd(0x71,WRDELAY); // contrast set
lcd_cmd(0x5E,WRDELAY); // power/icon/cont
lcd_cmd(0x6D,WRDELAY); // follower control
lcd_cmd(0x0C,WRDELAY); // display on
lcd_cmd(0x01,CLEARDELAY); // clear display
lcd_cmd(0x06,WRDELAY); // entry mode set
lcd_cmd(0x02,CLEARDELAY); // return home
lcd_ctrl |= LCD_CS_N;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_5_BASE, lcd_ctrl);
sys_ctrl |= LCD_CS_N;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
}
void lcd_write(char *row1, char *row2)
{
alt_u8 i, rowlen;
alt_u8 lcd_ctrl = 0x00;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_5_BASE, lcd_ctrl);
sys_ctrl &= ~(LCD_CS_N|LCD_RS);
IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
SPI_write(I2CA_BASE, 0x01); // clear display
usleep(CLEARDELAY);
lcd_cmd(0x01,CLEARDELAY); // clear display
// Set RS to enter data write mode
lcd_ctrl |= LCD_RS;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_5_BASE, lcd_ctrl);
sys_ctrl |= LCD_RS;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
//ensure no empty row
rowlen = strnlen(row1, LCD_ROW_LEN);
@@ -82,19 +79,16 @@ void lcd_write(char *row1, char *row2)
rowlen++;
}
for (i=0; i<rowlen; i++) {
SPI_write(I2CA_BASE, row1[i]);
usleep(WRDELAY);
}
for (i=0; i<rowlen; i++)
lcd_cmd(row1[i],WRDELAY);
// second row
lcd_ctrl &= ~LCD_RS;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_5_BASE, lcd_ctrl);
SPI_write(I2CA_BASE, (1<<7)|0x40);
usleep(WRDELAY);
sys_ctrl &= ~LCD_RS;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
lcd_cmd((1<<7)|0x40,WRDELAY);
lcd_ctrl |= LCD_RS;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_5_BASE, lcd_ctrl);
sys_ctrl |= LCD_RS;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
//ensure no empty row
rowlen = strnlen(row2, LCD_ROW_LEN);
@@ -103,11 +97,9 @@ void lcd_write(char *row1, char *row2)
rowlen++;
}
for (i=0; i<rowlen; i++) {
SPI_write(I2CA_BASE, row2[i]);
usleep(WRDELAY);
}
for (i=0; i<rowlen; i++)
lcd_cmd(row2[i],WRDELAY);
lcd_ctrl |= LCD_CS_N;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_5_BASE, lcd_ctrl);
sys_ctrl |= LCD_CS_N;
IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
}
software/sys_controller/spi_charlcd/lcd.h
-6
View File
@@ -26,12 +26,6 @@
#define LCD_ROW_LEN 16
//#define I2C_DEBUG
#define I2CA_BASE I2C_OPENCORES_0_BASE
#define LCD_CS_N (1<<0)
#define LCD_RS (1<<1)
void lcd_init();
void lcd_write(char *row1, char *row2);