diff options
Diffstat (limited to 'board/a4m072')
| -rw-r--r-- | board/a4m072/a4m072.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/board/a4m072/a4m072.c b/board/a4m072/a4m072.c index 3756975..9c272a0 100644 --- a/board/a4m072/a4m072.c +++ b/board/a4m072/a4m072.c @@ -34,6 +34,7 @@ #include <asm/io.h> #include <libfdt.h> #include <netdev.h> +#include <led-display.h> #include "mt46v32m16.h" @@ -261,3 +262,176 @@ int eeprom_write_enable (unsigned dev_addr, int state) return state; } #endif + +#ifdef CONFIG_CMD_DISPLAY +#define DISPLAY_BUF_SIZE 2 +static u8 display_buf[DISPLAY_BUF_SIZE]; +static u8 display_putc_pos; +static u8 display_out_pos; + +static u8 display_dot_enable; + +void display_set(int cmd) { + + if (cmd & DISPLAY_CLEAR) { + display_buf[0] = display_buf[1] = 0; + } + + if (cmd & DISPLAY_HOME) { + display_putc_pos = 0; + } + + if (cmd & DISPLAY_MARK) { + display_dot_enable = 1; + } else { + display_dot_enable = 0; + } +} + +#define SEG_A (1<<0) +#define SEG_B (1<<1) +#define SEG_C (1<<2) +#define SEG_D (1<<3) +#define SEG_E (1<<4) +#define SEG_F (1<<5) +#define SEG_G (1<<6) +#define SEG_P (1<<7) +#define SEG__ 0 + +/* + * +- A -+ + * | | + * F B + * | | + * +- G -+ + * | | + * E C + * | | + * +- D -+ P + * + * 0..9 index 0..9 + * A..Z index 10..35 + * - index 36 + * _ index 37 + */ + +#define SYMBOL_DASH (36) +#define SYMBOL_UNDERLINE (37) + +static u8 display_char2seg7_tbl[]= +{ + SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, /* 0 */ + SEG_B | SEG_C, /* 1 */ + SEG_A | SEG_B | SEG_D | SEG_E | SEG_G, /* 2 */ + SEG_A | SEG_B | SEG_C | SEG_D | SEG_G, /* 3 */ + SEG_B | SEG_C | SEG_F | SEG_G, /* 4 */ + SEG_A | SEG_C | SEG_D | SEG_F | SEG_G, /* 5 */ + SEG_A | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, /* 6 */ + SEG_A | SEG_B | SEG_C, /* 7 */ + SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, /* 8 */ + SEG_A | SEG_B | SEG_C | SEG_D | SEG_F | SEG_G, /* 9 */ + SEG_A | SEG_B | SEG_C | SEG_E | SEG_F | SEG_G, /* A */ + SEG_C | SEG_D | SEG_E | SEG_F | SEG_G, /* b */ + SEG_A | SEG_D | SEG_E | SEG_F, /* C */ + SEG_B | SEG_C | SEG_D | SEG_E | SEG_G, /* d */ + SEG_A | SEG_D | SEG_E | SEG_F | SEG_G, /* E */ + SEG_A | SEG_E | SEG_F | SEG_G, /* F */ + SEG_A | SEG_B | SEG_C | SEG_D | SEG_F | SEG_G, /* g */ + SEG_B | SEG_C | SEG_E | SEG_F | SEG_G, /* H */ + SEG_E | SEG_F, /* I */ + SEG_B | SEG_C | SEG_D | SEG_E, /* J */ + SEG_A, /* K - special 1 */ + SEG_D | SEG_E | SEG_F, /* L */ + SEG_B, /* m - special 2 */ + SEG_C | SEG_E | SEG_G, /* n */ + SEG_C | SEG_D | SEG_E | SEG_G, /* o */ + SEG_A | SEG_B | SEG_E | SEG_F | SEG_G, /* P */ + SEG_A | SEG_B | SEG_C | SEG_F | SEG_G, /* q */ + SEG_E | SEG_G, /* r */ + SEG_A | SEG_C | SEG_D | SEG_F | SEG_G, /* S */ + SEG_D | SEG_E | SEG_F | SEG_G, /* t */ + SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, /* U */ + SEG_C | SEG_D | SEG_E | SEG_F, /* V */ + SEG_C, /* w - special 3 */ + SEG_B | SEG_C | SEG_E | SEG_F | SEG_G, /* X */ + SEG_B | SEG_C | SEG_D | SEG_F | SEG_G, /* Y */ + SEG_A | SEG_B | SEG_D | SEG_E | SEG_G, /* Z */ + SEG_G, /* - */ + SEG_D /* _ */ +}; + +/* Convert char to the LED segments representation */ +static u8 display_char2seg7(char c) +{ + u8 val = 0; + + if (c >= '0' && c <= '9') + c -= '0'; + else if (c >= 'a' && c <= 'z') + c -= 'a' - 10; + else if (c >= 'A' && c <= 'Z') + c -= 'A' - 10; + else if (c == '-') + c = SYMBOL_DASH; + else if ((c == '_') || (c == '.')) + c = SYMBOL_UNDERLINE; + else + c = ' '; /* display unsupported symbols as space */ + + if (c != ' ') + val = display_char2seg7_tbl[(int)c]; + + /* Handle DP LED here */ + if (display_dot_enable) { + val |= SEG_P; + } + + return val; +} + +static inline int display_putc_nomark(char c) +{ + if (display_putc_pos >= DISPLAY_BUF_SIZE) + return -1; + + display_buf[display_putc_pos++] = display_char2seg7(c); + /* one-symbol message should be steady */ + if (display_putc_pos == 1) + display_buf[display_putc_pos] = display_char2seg7(c); + + return c; +} + +int display_putc(char c) +{ + /* Mark the codes from the "display" command with the DP LED */ + display_set(DISPLAY_MARK); + return display_putc_nomark(c); +} + +/* + * Output content of the software display buffer to the LED display every 0.5s + */ +void board_show_activity(ulong timestamp) +{ + static ulong last; + static u8 once; + u32 val; + + if (!once || (timestamp - last >= (CONFIG_SYS_HZ / 2))) { + val = display_buf[display_out_pos]; + val |= (val << 8) | (val << 16) | (val << 24); + out_be32((void *)CONFIG_SYS_DISP_CHR_RAM, val); + display_out_pos ^= 1; + last = timestamp; + once = 1; + } +} + +/* + * Empty fake function + */ +void show_activity(int arg) +{ +} +#endif |