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* See file CREDITS for list of people who contributed to this
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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#define LCD_CMD_ADDR 0x50100002
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#define LCD_DATA_ADDR 0x50100003
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#define LCD_BLK_CTRL CPLD_REG1_ADDR
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static char *amcc_logo = "AMCC 405EP TAIHU EVALUATION KIT";
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static int addr_flag = 0x80;
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static void lcd_bl_ctrl(char val)
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out_8((u8 *) LCD_BLK_CTRL, in_8((u8 *) LCD_BLK_CTRL) | val);
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static void lcd_putc(int val)
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if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
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if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
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printf("LCD is busy\n");
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addr = in_8((u8 *) LCD_CMD_ADDR);
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if ((addr != 0) && (addr % 0x10 == 0)) {
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out_8((u8 *) LCD_CMD_ADDR, addr_flag);
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out_8((u8 *) LCD_DATA_ADDR, val);
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static void lcd_puts(char *s)
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if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
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if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
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printf("LCD is busy\n");
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static void lcd_put_logo(void)
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if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
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if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
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printf("LCD is busy\n");
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out_8((u8 *) LCD_CMD_ADDR, 0x80);
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out_8((u8 *) LCD_CMD_ADDR, 0x38); /* set function:8-bit,2-line,5x7 font type */
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out_8((u8 *) LCD_CMD_ADDR, 0x0f); /* set display on,cursor on,blink on */
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out_8((u8 *) LCD_CMD_ADDR, 0x01); /* display clear */
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out_8((u8 *) LCD_CMD_ADDR, 0x06); /* set entry */
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lcd_bl_ctrl(0x02); /* set backlight on */
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static int do_lcd_clear (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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out_8((u8 *) LCD_CMD_ADDR, 0x01);
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static int do_lcd_puts (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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static int do_lcd_putc (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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lcd_putc((char)argv[1][0]);
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static int do_lcd_cur (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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count = simple_strtoul(argv[1], NULL, 16);
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printf("unable to shift > 0x20\n");
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dir = simple_strtoul(argv[2], NULL, 16);
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cur_addr = in_8((u8 *) LCD_CMD_ADDR);
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if (addr_flag == 0x80) {
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if (count >= (cur_addr & 0xf)) {
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out_8((u8 *) LCD_CMD_ADDR, 0x80);
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if (count >= ((cur_addr & 0x0f) + 0x0f)) {
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out_8((u8 *) LCD_CMD_ADDR, 0x80);
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} else if (count >= ( cur_addr & 0xf)) {
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count -= cur_addr & 0xf ;
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out_8((u8 *) LCD_CMD_ADDR, 0x80 | 0xf);
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if (addr_flag == 0x80) {
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if (count >= (0x1f - (cur_addr & 0xf))) {
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out_8((u8 *) LCD_CMD_ADDR, 0xc0 | 0xf);
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} else if ((count + (cur_addr & 0xf ))>= 0x0f) {
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count = count + (cur_addr & 0xf) - 0x0f;
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out_8((u8 *) LCD_CMD_ADDR, 0xc0);
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} else if ((count + (cur_addr & 0xf )) >= 0x0f) {
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out_8((u8 *) LCD_CMD_ADDR, 0xC0 | 0x0F);
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out_8((u8 *) LCD_CMD_ADDR, 0x10);
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out_8((u8 *) LCD_CMD_ADDR, 0x14);
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lcd_cls, 1, 1, do_lcd_clear,
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lcd_puts, 2, 1, do_lcd_puts,
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"display string on lcd",
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"<string> - <string> to be displayed"
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lcd_putc, 2, 1, do_lcd_putc,
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"display char on lcd",
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"<char> - <char> to be displayed"
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lcd_cur, 3, 1, do_lcd_cur,
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"shift cursor on lcd",
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"<count> <dir> - shift cursor on lcd <count> times, direction is <dir> \n"
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" <dir> - 0=backward 1=forward"