mimxrt/led: Add support for up to four LEDs.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

ports/mimxrt/led.c

@@ -31,16 +31,23 @@
 #include "py/mphal.h"
 #include "led.h"
 
-#if NUM_LEDS
+#if defined(MICROPY_HW_LED1_PIN)
 
-const machine_led_obj_t machine_led_obj[NUM_LEDS] = {
-    {
-        .base = {&machine_led_type},
-        .led_id = 1U,
-        .led_pin = &MICROPY_HW_LED1_PIN,
-    }
+const machine_led_obj_t machine_led_obj[] = {
+    { .base = {&machine_led_type}, .led_id = 1U, .led_pin = &MICROPY_HW_LED1_PIN, },
+    #if defined(MICROPY_HW_LED2_PIN)
+    { .base = {&machine_led_type}, .led_id = 2U, .led_pin = &MICROPY_HW_LED2_PIN, },
+    #if defined(MICROPY_HW_LED3_PIN)
+    { .base = {&machine_led_type}, .led_id = 3U, .led_pin = &MICROPY_HW_LED3_PIN, },
+    #if defined(MICROPY_HW_LED4_PIN)
+    { .base = {&machine_led_type}, .led_id = 4U, .led_pin = &MICROPY_HW_LED4_PIN, },
+    #endif
+    #endif
+    #endif
 };
 
+#define NUM_LEDS MP_ARRAY_SIZE(machine_led_obj)
+
 void led_init(void) {
     // Turn off LEDs and initialize
     for (mp_int_t led = 0; led < NUM_LEDS; led++) {
@@ -94,9 +101,4 @@ void led_debug(int value, int delay) {
     mp_hal_delay_ms(delay);
 }
 
-#else
-
-void led_init(void) {
-}
-
 #endif

ports/mimxrt/led.h

@@ -29,14 +29,20 @@
 
 #include "pin.h"
 
-#if defined(MICROPY_HW_LED1_PIN)
-#define NUM_LEDS (1)
-#else
-#define NUM_LEDS (0)
-#endif
-
 typedef enum {
-    MACHINE_BOARD_LED = 1,
+    #if defined(MICROPY_HW_LED1_PIN)
+    MACHINE_BOARD_LED1 = 1,
+    #if defined(MICROPY_HW_LED2_PIN)
+    MACHINE_BOARD_LED2 = 2,
+    #if defined(MICROPY_HW_LED3_PIN)
+    MACHINE_BOARD_LED3 = 3,
+    #if defined(MICROPY_HW_LED4_PIN)
+    MACHINE_BOARD_LED4 = 4,
+    #endif
+    #endif
+    #endif
+    #endif
+    MICROPY_HW_LED_MAX
 } machine_led_t;
 
 typedef struct _machine_led_obj_t {
@@ -51,6 +57,6 @@ void led_toggle(machine_led_t led);
 void led_debug(int value, int delay);
 
 extern const mp_obj_type_t machine_led_type;
-extern const machine_led_obj_t machine_led_obj[NUM_LEDS];
+extern const machine_led_obj_t machine_led_obj[];
 
 #endif // MICROPY_INCLUDED_MIMXRT_LED_H

ports/mimxrt/machine_led.c

@@ -28,7 +28,7 @@
 #include "py/mphal.h"
 #include "led.h"
 
-#if NUM_LEDS
+#if defined(MICROPY_HW_LED1_PIN)
 
 STATIC void led_obj_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
     (void)kind;
@@ -43,7 +43,7 @@ STATIC mp_obj_t led_obj_make_new(const mp_obj_type_t *type, size_t n_args, size_
     mp_int_t led_id = mp_obj_get_int(args[0]);
 
     // Check led id is in range
-    if (!(1 <= led_id && led_id <= NUM_LEDS)) {
+    if (!(1 <= led_id && led_id < MICROPY_HW_LED_MAX)) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("LED(%d) doesn't exist"), led_id);
     }
 

ports/mimxrt/main.c

@@ -55,7 +55,6 @@ int main(void) {
     board_init();
     ticks_init();
     tusb_init();
-    led_init();
     pendsv_init();
 
     #if MICROPY_PY_LWIP
@@ -71,6 +70,10 @@ int main(void) {
     #endif
 
     for (;;) {
+        #if defined(MICROPY_HW_LED1)
+        led_init();
+        #endif
+
         mp_stack_set_top(&_estack);
         mp_stack_set_limit(&_estack - &_sstack - 1024);
 

ports/mimxrt/modmachine.c

@@ -139,7 +139,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_mem8),                MP_ROM_PTR(&machine_mem8_obj) },
     { MP_ROM_QSTR(MP_QSTR_mem16),               MP_ROM_PTR(&machine_mem16_obj) },
     { MP_ROM_QSTR(MP_QSTR_mem32),               MP_ROM_PTR(&machine_mem32_obj) },
-    #if NUM_LEDS
+    #if defined(MICROPY_HW_LED1_PIN)
     { MP_ROM_QSTR(MP_QSTR_LED),                 MP_ROM_PTR(&machine_led_type) },
     #endif
     { MP_ROM_QSTR(MP_QSTR_Pin),                 MP_ROM_PTR(&machine_pin_type) },