feat: add gpio driver

Author: HalfSweet

src/fw/drivers/gpio.h

@@ -28,6 +28,11 @@
 
 #ifdef MICRO_FAMILY_NRF5
 #include <hal/nrf_gpio.h>
+#elifdef MICRO_FAMILY_SF32LB
+#include "bf0_hal.h"
+#endif
+
+#if defined(MICRO_FAMILY_NRF5) 
 
 typedef enum {
   GPIO_OType_PP,
@@ -48,7 +53,7 @@ typedef enum {
 
 #endif
 
-#ifdef MICRO_FAMILY_NRF5
+#if defined(MICRO_FAMILY_NRF5)
 
 void gpio_use(uint32_t pin);
 void gpio_release(uint32_t pin);
@@ -76,7 +81,7 @@ void gpio_output_init(const OutputConfig *pin_config, GPIOOType_TypeDef otype,
 //! is true, and drives it low if pin_config.active_high is false.
 void gpio_output_set(const OutputConfig *pin_config, bool asserted);
 
-#ifndef MICRO_FAMILY_NRF5
+#if !defined(MICRO_FAMILY_NRF5) && !defined(MICRO_FAMILY_SF32LB)
 
 //! Configure a GPIO alternate function.
 //!

src/fw/drivers/sf32lb/gpio.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "drivers/gpio.h"
+#include "system/passert.h"
+#include "board/board.h"
+
+#include "FreeRTOS.h"
+
+#include <stdint.h>
+
+static RCC_MODULE_TYPE prv_get_gpio_rcc_module(GPIO_TypeDef *GPIOx) {
+  if (GPIOx == hwp_gpio1) {
+    return RCC_MOD_GPIO1;
+  } else if (GPIOx == hwp_gpio2) {
+    return RCC_MOD_GPIO2;
+  } else {
+    WTF;
+  }
+  return 0;
+}
+
+void gpio_use(GPIO_TypeDef *GPIOx) {
+  RCC_MODULE_TYPE rcc_module = prv_get_gpio_rcc_module(GPIOx);
+  portENTER_CRITICAL();
+  HAL_RCC_EnableModule(rcc_module);
+  portEXIT_CRITICAL();
+}
+
+void gpio_release(GPIO_TypeDef *GPIOx) {
+  RCC_MODULE_TYPE rcc_module = prv_get_gpio_rcc_module(GPIOx);
+  portENTER_CRITICAL();
+  HAL_RCC_DisableModule(rcc_module);
+  portEXIT_CRITICAL();
+}
+
+void gpio_output_init(const OutputConfig *pin_config, GPIOOType_TypeDef otype,
+                      GPIOSpeed_TypeDef speed) {
+  (void)speed;
+  GPIO_InitTypeDef GPIO_InitStruct;
+  GPIO_InitStruct.Pin = pin_config->gpio_pin;
+  if (otype == GPIO_OType_OD) {
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
+  } else if (otype == GPIO_OType_PP) {
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT;
+  } else {
+    WTF;
+  }
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+
+  HAL_GPIO_Init(pin_config->gpio, &GPIO_InitStruct);
+}
+
+void gpio_input_init(const InputConfig *pin_config) {
+  gpio_use(pin_config->gpio);
+  GPIO_InitTypeDef GPIO_InitStruct;
+  GPIO_InitStruct.Pin = pin_config->gpio_pin;
+  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+
+  HAL_GPIO_Init(pin_config->gpio, &GPIO_InitStruct);
+}
+
+void gpio_output_set(const OutputConfig *pin_config, bool asserted) {
+  HAL_GPIO_WritePin(pin_config->gpio, pin_config->gpio_pin, asserted);
+}

src/fw/drivers/sf32lb/stubs/gpio.c

@@ -1572,7 +1572,7 @@ if mcu_family == 'SF32LB':
             'sf32lb/stubs/temperature.c',
             'sf32lb/stubs/periph_config.c',
             'sf32lb/stubs/gpio_defaults.c',
-            'sf32lb/stubs/gpio.c',
+            'sf32lb/gpio.c',
             #'nrf5/qspi.c',
             'sf32lb/stubs/button.c',
             'sf32lb/stubs/debounced_button.c',