From 79a3158de6dbd0b8f628fbf8cd5ffdeeea37bb6e Mon Sep 17 00:00:00 2001
From: Damien George <damien@micropython.org>
Date: Thu, 27 Jan 2022 16:36:08 +1100
Subject: [PATCH] stm32/pin: Change remaining uses of "af" to "alt".

The keyword "af" has been deprecated for some time and "alt" should be used
instead (but "af" still works).

Signed-off-by: Damien George <damien@micropython.org>
---
 docs/library/pyb.Pin.rst | 10 +++++-----
 ports/stm32/pin.c        | 10 +++++-----
 ports/stm32/timer.c      |  6 +++---
 3 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/docs/library/pyb.Pin.rst b/docs/library/pyb.Pin.rst
index 97dfbffbcf..23ede48ed3 100644
--- a/docs/library/pyb.Pin.rst
+++ b/docs/library/pyb.Pin.rst
@@ -237,17 +237,17 @@ pin X3.
 For the pyboard, x3_af would contain:
     [Pin.AF1_TIM2, Pin.AF2_TIM5, Pin.AF3_TIM9, Pin.AF7_USART2]
 
-Normally, each peripheral would configure the af automatically, but sometimes
-the same function is available on multiple pins, and having more control
-is desired.
+Normally, each peripheral would configure the alternate function automatically,
+but sometimes the same function is available on multiple pins, and having more
+control is desired.
 
 To configure X3 to expose TIM2_CH3, you could use::
 
-   pin = pyb.Pin(pyb.Pin.board.X3, mode=pyb.Pin.AF_PP, af=pyb.Pin.AF1_TIM2)
+   pin = pyb.Pin(pyb.Pin.board.X3, mode=pyb.Pin.AF_PP, alt=pyb.Pin.AF1_TIM2)
 
 or::
 
-   pin = pyb.Pin(pyb.Pin.board.X3, mode=pyb.Pin.AF_PP, af=1)
+   pin = pyb.Pin(pyb.Pin.board.X3, mode=pyb.Pin.AF_PP, alt=1)
 
 Methods
 -------
diff --git a/ports/stm32/pin.c b/ports/stm32/pin.c
index ad153311e3..b490a09b7f 100644
--- a/ports/stm32/pin.c
+++ b/ports/stm32/pin.c
@@ -230,9 +230,9 @@ STATIC void pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t
             mp_uint_t af_idx = pin_get_af(self);
             const pin_af_obj_t *af_obj = pin_find_af_by_index(self, af_idx);
             if (af_obj == NULL) {
-                mp_printf(print, ", af=%d)", af_idx);
+                mp_printf(print, ", alt=%d)", af_idx);
             } else {
-                mp_printf(print, ", af=Pin.%q)", af_obj->name);
+                mp_printf(print, ", alt=Pin.%q)", af_obj->name);
             }
         } else {
             mp_print_str(print, ")");
@@ -328,7 +328,7 @@ STATIC mp_obj_t pin_debug(size_t n_args, const mp_obj_t *args) {
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pin_debug_fun_obj, 1, 2, pin_debug);
 STATIC MP_DEFINE_CONST_CLASSMETHOD_OBJ(pin_debug_obj, MP_ROM_PTR(&pin_debug_fun_obj));
 
-// init(mode, pull=None, af=-1, *, value, alt)
+// init(mode, pull=None, alt=-1, *, value, alt)
 STATIC mp_obj_t pin_obj_init_helper(const pin_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_INT },
@@ -625,9 +625,9 @@ const mp_obj_type_t pin_type = {
 /// is desired.
 ///
 /// To configure X3 to expose TIM2_CH3, you could use:
-///    pin = pyb.Pin(pyb.Pin.board.X3, mode=pyb.Pin.AF_PP, af=pyb.Pin.AF1_TIM2)
+///    pin = pyb.Pin(pyb.Pin.board.X3, mode=pyb.Pin.AF_PP, alt=pyb.Pin.AF1_TIM2)
 /// or:
-///    pin = pyb.Pin(pyb.Pin.board.X3, mode=pyb.Pin.AF_PP, af=1)
+///    pin = pyb.Pin(pyb.Pin.board.X3, mode=pyb.Pin.AF_PP, alt=1)
 
 /// \method __str__()
 /// Return a string describing the alternate function.
diff --git a/ports/stm32/timer.c b/ports/stm32/timer.c
index c23e7e02d4..5a968ec56d 100644
--- a/ports/stm32/timer.c
+++ b/ports/stm32/timer.c
@@ -1110,14 +1110,14 @@ STATIC mp_obj_t pyb_timer_channel(size_t n_args, const mp_obj_t *pos_args, mp_ma
         const pin_obj_t *pin = MP_OBJ_TO_PTR(pin_obj);
         const pin_af_obj_t *af = pin_find_af(pin, AF_FN_TIM, self->tim_id);
         if (af == NULL) {
-            mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("Pin(%q) doesn't have an af for Timer(%d)"), pin->name, self->tim_id);
+            mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("Pin(%q) doesn't have an alt for Timer(%d)"), pin->name, self->tim_id);
         }
-        // pin.init(mode=AF_PP, af=idx)
+        // pin.init(mode=AF_PP, alt=idx)
         const mp_obj_t args2[6] = {
             MP_OBJ_FROM_PTR(&pin_init_obj),
             pin_obj,
             MP_OBJ_NEW_QSTR(MP_QSTR_mode),  MP_OBJ_NEW_SMALL_INT(GPIO_MODE_AF_PP),
-            MP_OBJ_NEW_QSTR(MP_QSTR_af),    MP_OBJ_NEW_SMALL_INT(af->idx)
+            MP_OBJ_NEW_QSTR(MP_QSTR_alt),   MP_OBJ_NEW_SMALL_INT(af->idx)
         };
         mp_call_method_n_kw(0, 2, args2);
     }