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Commit f6dfed0

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shenkimithro
shenki
authored and
mithro
committed
lm32: Add leds module
This lets micropython control the LEDs >>> import litex >>> led1 = litex.LED(1) >>> led1 LED(1) >>> led1.on() >>> led1.off() >>> led1.read() False >>> led1.on() >>> led1.read() False Signed-off-by: Joel Stanley <joel@jms.id.au>
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‎lm32/Makefile‎

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@@ -29,6 +29,7 @@ SRC_C = \
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isr.c \
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modmachine.c \
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modlitex.c \
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litex_leds.c \
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lib/utils/stdout_helpers.c \
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lib/utils/interrupt_char.c \
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lib/utils/pyexec.c \
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‎lm32/litex_leds.c‎

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#include "py/nlr.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "py/objexcept.h"
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#include "generated/csr.h"
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const mp_obj_type_t litex_led_type;
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typedef struct _litex_led_obj_t {
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mp_obj_base_t base;
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int num;
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} litex_led_obj_t;
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STATIC litex_led_obj_t litex_leds[8] = {
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{{&litex_led_type}, 1},
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{{&litex_led_type}, 2},
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{{&litex_led_type}, 3},
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{{&litex_led_type}, 4},
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{{&litex_led_type}, 5},
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{{&litex_led_type}, 6},
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{{&litex_led_type}, 7},
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{{&litex_led_type}, 8}
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};
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STATIC mp_obj_t litex_led_make_new(const mp_obj_type_t *type_in,
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size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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mp_uint_t led_num = mp_obj_get_int(args[0]);
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switch (led_num) {
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case 1 ... 8:
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return &litex_leds[led_num - 1];
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default:
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
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"not a valid LED number: %d", led_num));
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}
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}
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void litex_led_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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litex_led_obj_t *self = self_in;
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mp_printf(print, "LED(%u)", self->num);
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}
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STATIC mp_obj_t litex_led_read(mp_obj_t self_in) {
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litex_led_obj_t *led = self_in;
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bool state = cas_leds_out_read() & (led->num - 1);
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return mp_obj_new_bool(state);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(litex_led_read_obj, litex_led_read);
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STATIC mp_obj_t litex_led_on(mp_obj_t self_in) {
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litex_led_obj_t *led = self_in;
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char value = cas_leds_out_read();
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cas_leds_out_write(value | (1 << (led->num - 1)));
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(litex_led_on_obj, litex_led_on);
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STATIC mp_obj_t litex_led_off(mp_obj_t self_in) {
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litex_led_obj_t *led = self_in;
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char value = cas_leds_out_read();
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cas_leds_out_write(value & ~(1 << (led->num - 1)));
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(litex_led_off_obj, litex_led_off);
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STATIC const mp_map_elem_t litex_led_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&litex_led_read_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_on), (mp_obj_t)&litex_led_on_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_off), (mp_obj_t)&litex_led_off_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(litex_led_locals_dict, litex_led_locals_dict_table);
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const mp_obj_type_t litex_led_type = {
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{ &mp_type_type },
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.name = MP_QSTR_LED,
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.print = litex_led_print,
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.make_new = litex_led_make_new,
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.locals_dict = (mp_obj_t)&litex_led_locals_dict,
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};
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‎lm32/modlitex.c‎

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#include "py/obj.h"
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extern const mp_obj_type_t litex_led_type;
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STATIC const mp_rom_map_elem_t litex_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_litex) },
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{ MP_ROM_QSTR(MP_QSTR_LED), MP_ROM_PTR(&litex_led_type) },
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};
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STATIC MP_DEFINE_CONST_DICT(litex_module_globals, litex_module_globals_table);

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