stmhal - add pin mapping, gpio, exti, usrsw

1 files changed, 72 insertions, 0 deletions

diff --git a/stmhal/gpio.c b/stmhal/gpio.c
new file mode 100644
index 0000000000..be1249b376
--- /dev/null
+++ b/stmhal/gpio.c
@@ -0,0 +1,72 @@
+// This is a woefully inadequate set of bindings for GPIO control, and
+// needs to be replaced with something much better.
+
+#include <stdio.h>
+#include <string.h>
+#include <stm32f4xx_hal.h>
+
+#include "nlr.h"
+#include "misc.h"
+#include "mpconfig.h"
+#include "qstr.h"
+#include "misc.h"
+#include "parse.h"
+#include "obj.h"
+#include "compile.h"
+#include "runtime0.h"
+#include "runtime.h"
+#include "systick.h"
+#include "gpio.h"
+#include "pin.h"
+
+mp_obj_t pyb_gpio(uint n_args, mp_obj_t *args) {
+    const pin_obj_t *pin = pin_map_user_obj(args[0]);
+    if (n_args == 1) {
+        // get pin
+        return MP_OBJ_NEW_SMALL_INT(HAL_GPIO_ReadPin(pin->gpio, pin->pin_mask));
+    }
+
+    // set pin
+    HAL_GPIO_WritePin(pin->gpio, pin->pin_mask, rt_is_true(args[1]));
+    return mp_const_none;
+}
+
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_gpio_obj, 1, 2, pyb_gpio);
+
+mp_obj_t pyb_gpio_input(uint n_args, mp_obj_t *args) {
+    const pin_obj_t *pin = pin_map_user_obj(args[0]);
+
+    uint32_t pull = GPIO_NOPULL;
+    if (n_args > 1) {
+        pull = mp_obj_get_int(args[1]);
+    }
+    GPIO_InitTypeDef GPIO_InitStructure;
+    GPIO_InitStructure.Pin = pin->pin_mask;
+    GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
+    GPIO_InitStructure.Pull = pull;
+    HAL_GPIO_Init(pin->gpio, &GPIO_InitStructure);
+
+    return mp_const_none;
+}
+
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_gpio_input_obj, 1, 2, pyb_gpio_input);
+
+mp_obj_t pyb_gpio_output(uint n_args, mp_obj_t *args) {
+    const pin_obj_t *pin = pin_map_user_obj(args[0]);
+
+    uint32_t mode = GPIO_MODE_OUTPUT_PP;
+    if (n_args > 1) {
+        mode = mp_obj_get_int(args[1]) == GPIO_MODE_OUTPUT_OD ?
+                 GPIO_MODE_OUTPUT_OD: GPIO_MODE_OUTPUT_PP;
+    }
+    GPIO_InitTypeDef GPIO_InitStructure;
+    GPIO_InitStructure.Pin = pin->pin_mask;
+    GPIO_InitStructure.Mode = mode;
+    GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
+    GPIO_InitStructure.Pull = GPIO_NOPULL;
+    HAL_GPIO_Init(pin->gpio, &GPIO_InitStructure);
+
+    return mp_const_none;
+}
+
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_gpio_output_obj, 1, 2, pyb_gpio_output);