*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
#include "ao.h"
-#define LCD_PORT PORTB
-#define LCD_DDR DDRB
-
-#define PIN_RS 4
-#define PIN_E 5
-#define PIN_RW 6
-
-void
-ao_lcd_set_bits(uint8_t bits)
-{
-#if 0
- printf("\tLCD data %x RS %d R/W %d E %d\n",
- bits & 0xf,
- (bits & (1 << PIN_RS)) ? 1 : 0,
- (bits & (1 << PIN_RW)) ? 1 : 0,
- (bits & (1 << PIN_E)) ? 1 : 0);
-#endif
- LCD_PORT = bits;
-#if 0
- ao_delay(1);
- if (bits & (1 << PIN_RW))
- printf("\tLCD input %x\n", PINB);
-#endif
-}
-
-uint8_t
-ao_lcd_get_nibble(uint8_t rs)
-{
- uint8_t data = (rs ? (1 << PIN_RS) : 0) | (1 << PIN_RW);
- uint8_t n;
-
- DDRB = (1 << PIN_RS) | (1 << PIN_E) | (1 << PIN_RW);
- ao_lcd_set_bits(data);
- ao_lcd_set_bits(data | (1 << PIN_E));
- n = PINB & 0xf;
- ao_lcd_set_bits(data);
- return n;
-}
-
-uint8_t
-ao_lcd_get_status(void)
-{
- uint8_t high, low;
- uint8_t data;
-
- high = ao_lcd_get_nibble(0);
- low = ao_lcd_get_nibble(0);
- data = (high << 4) | low;
- printf ("\tLCD status %02x\n", data);
- return data;
-}
-
-uint8_t
-ao_lcd_get_data(void)
-{
- uint8_t high, low;
- uint8_t data;
-
- high = ao_lcd_get_nibble(1);
- low = ao_lcd_get_nibble(1);
- data = (high << 4) | low;
- printf ("\tLCD data %02x\n", data);
- return data;
-}
-
-void
-ao_lcd_wait_idle(void)
-{
- uint8_t status;
- uint8_t count = 0;
-
- do {
- status = ao_lcd_get_status();
- count++;
- if (count > 100) {
- printf("idle timeout\n");
- break;
- }
- } while (0); /* status & 0x80); */
-}
-
-void
-ao_lcd_send_nibble(uint8_t rs, uint8_t data)
-{
- data = (data & 0xf) | (rs ? (1 << PIN_RS) : 0);
- DDRB = (0xf) | (1 << PIN_RS) | (1 << PIN_E) | (1 << PIN_RW);
- ao_lcd_set_bits(data);
- ao_lcd_set_bits(data | (1 << PIN_E));
- ao_lcd_set_bits(data);
-}
-
static uint16_t ao_lcd_time = 3;
-void
+static __xdata uint8_t ao_lcd_mutex;
+
+static void
ao_lcd_delay(void)
{
volatile uint16_t count;
;
}
-void
-ao_lcd_send_ins(uint8_t data)
+static void
+ao_lcd_send_ins(uint8_t ins)
{
-// printf("send ins %02x\n", data);
+// printf("send ins %02x\n", ins);
// ao_lcd_wait_idle();
// ao_delay(1);
ao_lcd_delay();
- ao_lcd_send_nibble(0, data >> 4);
- ao_lcd_send_nibble(0, data & 0xf);
+ ao_lcd_port_put_nibble(0, ins >> 4);
+ ao_lcd_port_put_nibble(0, ins & 0xf);
}
-void
-ao_lcd_send_data(uint8_t data)
+static void
+ao_lcd_put_byte(uint8_t c)
{
-// printf ("send data %02x\n", data);
+// printf ("send data %02x\n", c);
// ao_lcd_wait_idle();
ao_lcd_delay();
- ao_lcd_send_nibble(1, data >> 4);
- ao_lcd_send_nibble(1, data & 0x0f);
+ ao_lcd_port_put_nibble(1, c >> 4);
+ ao_lcd_port_put_nibble(1, c & 0x0f);
}
void
-ao_lcd_send_string(char *string)
+ao_lcd_putstring(char *string)
{
- uint8_t c;
+ char c;
+ ao_mutex_get(&ao_lcd_mutex);
while ((c = (uint8_t) *string++))
- ao_lcd_send_data(c);
+ ao_lcd_put_byte((uint8_t) c);
+ ao_mutex_put(&ao_lcd_mutex);
}
#define AO_LCD_POWER_CONTROL 0x54
void
ao_lcd_contrast_set(uint8_t contrast)
{
+ ao_mutex_get(&ao_lcd_mutex);
ao_lcd_send_ins(AO_LCD_POWER_CONTROL | ((contrast >> 4) & 0x3));
ao_lcd_send_ins(0x70 | (contrast & 0xf));
+ ao_mutex_put(&ao_lcd_mutex);
+}
+
+void
+ao_lcd_cursor_on(void)
+{
+ ao_mutex_get(&ao_lcd_mutex);
+ ao_lcd_send_ins(0x08 | 0x04 | 0x02 | 0x01);
+ ao_mutex_put(&ao_lcd_mutex);
+}
+
+void
+ao_lcd_cursor_off(void)
+{
+ ao_mutex_get(&ao_lcd_mutex);
+ ao_lcd_send_ins(0x08 | 0x04);
+ ao_mutex_put(&ao_lcd_mutex);
}
void
ao_lcd_clear(void)
{
+ ao_mutex_get(&ao_lcd_mutex);
ao_lcd_send_ins(0x01);
ao_delay(1);
/* Entry mode */
ao_lcd_send_ins(0x04 | 0x02);
+ ao_mutex_put(&ao_lcd_mutex);
+}
+
+void
+ao_lcd_goto(uint8_t addr)
+{
+ ao_mutex_get(&ao_lcd_mutex);
+ ao_lcd_send_ins(0x80 | addr);
+ ao_lcd_send_ins(0x04 | 0x02);
+ ao_mutex_put(&ao_lcd_mutex);
}
void
ao_lcd_start(void)
{
/* get to 4bit mode */
- ao_lcd_send_nibble(0, 0x3);
- ao_lcd_send_nibble(0, 0x3);
- ao_lcd_send_nibble(0, 0x3);
- ao_lcd_send_nibble(0, 0x2);
+ ao_lcd_port_put_nibble(0, 0x3);
+ ao_lcd_port_put_nibble(0, 0x3);
+ ao_lcd_port_put_nibble(0, 0x3);
+ ao_lcd_port_put_nibble(0, 0x2);
/* function set */
ao_lcd_send_ins(0x28);
/* Clear */
ao_lcd_clear();
-
-}
-
-void
-ao_lcd_contrast(void)
-{
- ao_cmd_hex();
- if (ao_cmd_status == ao_cmd_success) {
- printf("setting contrast to %02x\n", ao_cmd_lex_i);
- ao_lcd_contrast_set(ao_cmd_lex_i & 0x3f);
- }
-}
-
-static uint8_t
-ao_cmd_hex_nibble(void)
-{
- if ('0' <= ao_cmd_lex_c && ao_cmd_lex_c <= '9')
- return ao_cmd_lex_c - '0';
- if ('a' <= ao_cmd_lex_c && ao_cmd_lex_c <= 'f')
- return ao_cmd_lex_c - ('a' - 10);
- if ('A' <= ao_cmd_lex_c && ao_cmd_lex_c <= 'F')
- return ao_cmd_lex_c - ('A' - 10);
- ao_cmd_status = ao_cmd_syntax_error;
- return 0;
-}
-
-void
-ao_lcd_string(void)
-{
- uint8_t col = 0;
- uint8_t c;
-
- ao_cmd_decimal();
- if (ao_cmd_status != ao_cmd_success)
- return;
- ao_lcd_send_ins(0x80 | (ao_cmd_lex_i ? 0x40 : 0x00));
- ao_cmd_white();
- while (ao_cmd_lex_c != '\n') {
- c = ao_cmd_lex_c;
- if (c == '\\') {
- ao_cmd_lex();
- c = ao_cmd_hex_nibble() << 4;
- ao_cmd_lex();
- c |= ao_cmd_hex_nibble();
- }
- ao_lcd_send_data(c);
- ao_cmd_lex();
- col++;
- }
- while (col < 16) {
- ao_lcd_send_data(' ');
- col++;
- }
-}
-
-void
-ao_lcd_delay_set(void)
-{
- ao_cmd_decimal();
- if (ao_cmd_status == ao_cmd_success) {
- printf("setting LCD delay to %d\n", ao_cmd_lex_i);
- ao_lcd_time = ao_cmd_lex_i;
- }
}
-__code struct ao_cmds ao_lcd_cmds[] = {
- { ao_lcd_start, "S\0Start LCD" },
- { ao_lcd_contrast, "C <contrast>\0Set LCD contrast" },
- { ao_lcd_string, "s <line> <string>\0Send string to LCD" },
- { ao_lcd_delay_set, "t <delay>\0Set LCD delay" },
- { 0, NULL },
-};
-
void
ao_lcd_init(void)
{
- DDRB = (1 << PIN_RS) | (1 << PIN_E) | (1 << PIN_RW);
- PORTB = 0;
- ao_cmd_register(&ao_lcd_cmds[0]);
+ ao_lcd_port_init();
}
projects / fw / altos / blobdiff