Initial Release

src/host/hardware_gpio/CMakeLists.txt

@@ -0,0 +1 @@
+pico_simple_hardware_target(gpio)

src/host/hardware_gpio/gpio.c

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "hardware/gpio.h"
+
+// todo weak or replace? probably weak
+void gpio_set_function(uint gpio, enum gpio_function fn) {
+
+}
+
+void gpio_pull_up(uint gpio) {
+
+}
+
+void gpio_pull_down(uint gpio) {
+
+}
+
+void gpio_disable_pulls(uint gpio) {
+
+}
+
+void gpio_set_pulls(uint gpio, bool up, bool down) {
+
+}
+
+void gpio_set_outover(uint gpio, uint value) {
+
+}
+
+void gpio_set_inover(uint gpio, uint value) {
+
+}
+
+void gpio_set_oeover(uint gpio, uint value) {
+
+}
+
+void gpio_set_irq_enabled(uint gpio, uint32_t events, bool enable) {
+
+}
+
+void gpio_acknowledge_irq(uint gpio, uint32_t events) {
+
+}
+
+void gpio_init(uint gpio) {
+
+}
+
+PICO_WEAK_FUNCTION_DEF(gpio_get)
+
+bool PICO_WEAK_FUNCTION_IMPL_NAME(gpio_get)(uint gpio) {
+    return 0;
+}
+
+uint32_t gpio_get_all() {
+    return 0;
+}
+
+void gpio_set_mask(uint32_t mask) {
+
+}
+
+void gpio_clr_mask(uint32_t mask) {
+
+}
+
+void gpio_xor_mask(uint32_t mask) {
+
+}
+
+void gpio_put_masked(uint32_t mask, uint32_t value) {
+
+}
+
+void gpio_put_all(uint32_t value) {
+
+}
+
+void gpio_put(uint gpio, int value) {
+
+}
+
+void gpio_set_dir_out_masked(uint32_t mask) {
+
+}
+
+void gpio_set_dir_in_masked(uint32_t mask) {
+
+}
+
+void gpio_set_dir_masked(uint32_t mask, uint32_t value) {
+
+}
+
+void gpio_set_dir_all_bits(uint32_t value) {
+
+}
+
+void gpio_set_dir(uint gpio, bool out) {
+
+}
+
+void gpio_debug_pins_init() {
+
+}
+
+void gpio_set_input_enabled(uint gpio, bool enable) {
+
+}
+
+void gpio_init_mask(uint gpio_mask) {
+
+}

src/host/hardware_gpio/include/hardware/gpio.h

@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _HARDWARE_GPIO_H_
+#define _HARDWARE_GPIO_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "pico.h"
+
+enum gpio_function {
+    GPIO_FUNC_XIP = 0,
+    GPIO_FUNC_SPI = 1,
+    GPIO_FUNC_UART = 2,
+    GPIO_FUNC_I2C = 3,
+    GPIO_FUNC_PWM = 4,
+    GPIO_FUNC_SIO = 5,
+    GPIO_FUNC_PIO0 = 6,
+    GPIO_FUNC_PIO1 = 7,
+    GPIO_FUNC_GPCK = 8,
+    GPIO_FUNC_USB = 9,
+    GPIO_FUNC_NULL = 0xf,
+};
+
+
+#define GPIO_OUT 1
+#define GPIO_IN 0
+
+#define N_GPIOS 30
+
+// ----------------------------------------------------------------------------
+// Pad Controls + IO Muxing
+// ----------------------------------------------------------------------------
+// Declarations for gpio.c
+
+void gpio_set_function(uint gpio, enum gpio_function fn);
+
+enum gpio_function gpio_get_function(uint gpio);
+
+void gpio_pull_up(uint gpio);
+
+void gpio_pull_down(uint gpio);
+
+void gpio_disable_pulls(uint gpio);
+
+void gpio_set_pulls(uint gpio, bool up, bool down);
+
+void gpio_set_outover(uint gpio, uint value);
+
+void gpio_set_inover(uint gpio, uint value);
+
+void gpio_set_oeover(uint gpio, uint value);
+
+void gpio_set_input_enabled(uint gpio, bool enable);
+
+// Configure a GPIO for direct input/output from software
+void gpio_init(uint gpio);
+
+void gpio_init_mask(uint gpio_mask);
+
+// ----------------------------------------------------------------------------
+// Input
+// ----------------------------------------------------------------------------
+
+// Get the value of a single GPIO
+bool gpio_get(uint gpio);
+
+// Get raw value of all
+uint32_t gpio_get_all();
+
+// ----------------------------------------------------------------------------
+// Output
+// ----------------------------------------------------------------------------
+
+// Drive high every GPIO appearing in mask
+void gpio_set_mask(uint32_t mask);
+
+void gpio_clr_mask(uint32_t mask);
+
+// Toggle every GPIO appearing in mask
+void gpio_xor_mask(uint32_t mask);
+
+
+// For each 1 bit in "mask", drive that pin to the value given by
+// corresponding bit in "value", leaving other pins unchanged.
+// Since this uses the TOGL alias, it is concurrency-safe with e.g. an IRQ
+// bashing different pins from the same core.
+void gpio_put_masked(uint32_t mask, uint32_t value);
+
+// Drive all pins simultaneously
+void gpio_put_all(uint32_t value);
+
+
+// Drive a single GPIO high/low
+void gpio_put(uint gpio, int value);
+
+// ----------------------------------------------------------------------------
+// Direction
+// ----------------------------------------------------------------------------
+
+// Switch all GPIOs in "mask" to output
+void gpio_set_dir_out_masked(uint32_t mask);
+
+// Switch all GPIOs in "mask" to input
+void gpio_set_dir_in_masked(uint32_t mask);
+
+// For each 1 bit in "mask", switch that pin to the direction given by
+// corresponding bit in "value", leaving other pins unchanged.
+// E.g. gpio_set_dir_masked(0x3, 0x2); -> set pin 0 to input, pin 1 to output,
+// simultaneously.
+void gpio_set_dir_masked(uint32_t mask, uint32_t value);
+
+// Set direction of all pins simultaneously.
+// For each bit in value,
+// 1 = out
+// 0 = in
+void gpio_set_dir_all_bits(uint32_t value);
+
+// Set a single GPIO to input/output.
+// true = out
+// 0 = in
+void gpio_set_dir(uint gpio, bool out);
+
+// debugging
+#define PICO_DEBUG_PIN_BASE 19u
+
+// note these two macros may only be used once per compilation unit
+#define CU_REGISTER_DEBUG_PINS(p, ...)
+#define CU_SELECT_DEBUG_PINS(x)
+#define DEBUG_PINS_ENABLED(p) false
+
+#define DEBUG_PINS_SET(p, v) ((void)0)
+#define DEBUG_PINS_CLR(p, v) ((void)0)
+#define DEBUG_PINS_XOR(p, v) ((void)0)
+
+void gpio_debug_pins_init();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif