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Diffstat (limited to 'firmware/zpu/lib/hal_io.c')
| -rw-r--r-- | firmware/zpu/lib/hal_io.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/firmware/zpu/lib/hal_io.c b/firmware/zpu/lib/hal_io.c new file mode 100644 index 000000000..4ed694b9d --- /dev/null +++ b/firmware/zpu/lib/hal_io.c @@ -0,0 +1,273 @@ +/* -*- c -*- */ +/* + * Copyright 2007,2008 Free Software Foundation, Inc. + * + * 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, either version 3 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 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +// conditionalized on HAL_IO_USES_DBOARD_PINS && HAL_IO_USES_UART + +#include "memory_map.h" +#include "hal_uart.h" +#include "hal_io.h" +#include <stdbool.h> +#include <stdio.h> +#include <string.h> + +/* + * ======================================================================== + * leds + * ======================================================================== + */ + +static unsigned long leds_shadow = 0; +static unsigned long led_src_shadow = 0; + +void +hal_set_leds(int value, int mask) +{ + int ei = hal_disable_ints(); + leds_shadow = (leds_shadow & ~mask) | (value & mask); + output_regs->leds = leds_shadow; + hal_restore_ints(ei); +} + +// Allow hardware control over leds. 1 = hardware, 0 = software +void +hal_set_led_src(int value, int mask) +{ + int ei = hal_disable_ints(); + led_src_shadow = (led_src_shadow & ~mask) | (value & mask); + output_regs->led_src = led_src_shadow; + hal_restore_ints(ei); +} + +void +hal_toggle_leds(int mask) +{ + int ei = hal_disable_ints(); + leds_shadow ^= mask; + output_regs->leds = leds_shadow; + hal_restore_ints(ei); +} + + +// ================================================================ +// primitives +// ================================================================ + +#if defined(HAL_IO_USES_DBOARD_PINS) +// +// Does i/o using high 9-bits of rx daughterboard pins. +// +// 1 1 1 1 1 1 +// 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | char |W| | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// +// +// Asserts W when writing char +// + +#define W 0x0080 + +void +hal_io_init(void) +{ + // make high 9 bits of tx daughterboard outputs + hal_gpio_set_rx_mode(15, 7, GPIOM_OUTPUT); + + // and set them to zero + hal_gpio_set_rx(0x0000, 0xff80); +} + +void +hal_finish(void) +{ + volatile unsigned long *p = (unsigned long *) 0xC2F0; + *p = 0; +} + +// %c +inline int +putchar(int ch) +{ + hal_gpio_set_rx((s << 8) | W, 0xff80); + hal_gpio_set_rx(0, 0xff80); + return ch; +} + +#elif defined(HAL_IO_USES_UART) + +void +hal_io_init(void) +{ + hal_uart_init(); +} + +void +hal_finish(void) +{ +} + +// %c +inline int +fputchar(hal_uart_name_t u, int ch) +{ + hal_uart_putc(u, ch); + return ch; +} + +inline int +putchar(int ch) +{ + hal_uart_putc(DEFAULT_UART, ch); + return ch; +} + +int +fgetchar(hal_uart_name_t u) +{ + return hal_uart_getc(u); +} + +int +getchar(void) +{ + return fgetchar(DEFAULT_UART); +} + +#else // nop all i/o + +void +hal_io_init(void) +{ +} + +void +hal_finish(void) +{ +} + +// %c +inline int +putchar(int ch) +{ + return ch; +} + +int +getchar(void) +{ + return EOF; +} + +#endif + +// ================================================================ +// (slightly) higher level functions +// +// These are here so we can inline the calls to putchar. +// The rest of the stuff was moved to nonstdio.c +// ================================================================ + +// \n +inline void +fnewline(hal_uart_name_t u) +{ + fputchar(u, '\n'); +} + +inline void +newline(void) +{ + fnewline(DEFAULT_UART); +} + +int +fputstr(hal_uart_name_t u, const char *s) +{ + while (*s) + fputchar(u, *s++); + + return 0; +} + +int +fnputstr(hal_uart_name_t u, const char *s, int len) +{ + int x = 0; + while (*s && (len > x++)) + fputchar(u, *s++); + + return x; +} + +int +putstr(const char *s) +{ + return fputstr(DEFAULT_UART, s); +} + +int +fputs(hal_uart_name_t u, const char *s) +{ + fputstr(u, s); + fputchar(u, '\n'); + return 0; +} + +int puts(const char *s) +{ + return fputs(DEFAULT_UART, s); +} + +char * +fgets(hal_uart_name_t u, char * const s) +{ + char *x = s; + while((*x=(char)hal_uart_getc(u)) != '\n') x++; + *x = 0; + return s; +} + +int +fngets(hal_uart_name_t u, char * const s, int len) +{ + char *x = s; + while(((*x=(char)hal_uart_getc(u)) != '\n') && ((x-s) < len)) x++; + *x = 0; + return (x-s); +} + +int +fngets_noblock(hal_uart_name_t u, char * const s, int len) +{ + int i; + for(i=0; i < len; i++) { + s[i] = (char) hal_uart_getc_noblock(u); + if((s[i] == 255) || (s[i] == '\n')) break; + } + s[i] = 0; + + return i; +} + +char * +gets(char * const s) +{ + return fgets(DEFAULT_UART, s); +} + |