jyapayne/switch-pico
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Add Pico 2 W Bluepad32 AIO backend

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This commit is contained in:
Joey Yakimowich-Payne 2026-08-29 17:37:48 -06:00
commit f451e27f8c
17 changed files with 1263 additions and 24 deletions
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39
switch-pico.cpp
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@ -1,10 +1,14 @@
#include <stdio.h>
#include <string.h>
#include "bsp/board.h"
#include "hardware/uart.h"
#include "pico/stdlib.h"
#include "tusb.h"
#include "switch_pro_driver.h"
#ifndef SWITCH_PICO_BLUEPAD32
#include "hardware/uart.h"
#else
#include "bluepad32_input_backend.h"
#endif
#ifdef SWITCH_PICO_LOG
#define LOG_PRINTF(...) printf(__VA_ARGS__)
@ -12,6 +16,7 @@
#define LOG_PRINTF(...) ((void)0)
#endif
#ifndef SWITCH_PICO_BLUEPAD32
// UART1 is reserved for external input frames from the host PC.
#define UART_ID uart1
#define BAUD_RATE 921600
@ -19,6 +24,7 @@
#define UART_RX_PIN 5
#define UART_RUMBLE_HEADER 0xBB
#define UART_RUMBLE_RUMBLE_TYPE 0x01
#endif
static bool g_last_mounted = false;
static bool g_last_ready = false;
@ -26,12 +32,14 @@ static bool g_last_ready = false;
// Track the latest state provided by UART or the autopilot.
static SwitchInputState g_user_state;
#ifndef SWITCH_PICO_BLUEPAD32
static void init_uart_input() {
uart_init(UART_ID, BAUD_RATE);
gpio_set_function(UART_TX_PIN, GPIO_FUNC_UART);
gpio_set_function(UART_RX_PIN, GPIO_FUNC_UART);
uart_set_format(UART_ID, 8, 1, UART_PARITY_NONE);
}
#endif
static SwitchInputState neutral_input() {
SwitchInputState state{};
@ -42,6 +50,7 @@ static SwitchInputState neutral_input() {
return state;
}
#ifndef SWITCH_PICO_BLUEPAD32
static void send_rumble_uart_frame(const uint8_t rumble[8]) {
uint8_t frame[11];
frame[0] = UART_RUMBLE_HEADER;
@ -55,11 +64,17 @@ static void send_rumble_uart_frame(const uint8_t rumble[8]) {
frame[10] = checksum;
uart_write_blocking(UART_ID, frame, sizeof(frame));
}
#endif
static void on_rumble_from_switch(const uint8_t rumble[8]) {
#ifdef SWITCH_PICO_BLUEPAD32
bluepad32_input_backend_queue_rumble(rumble);
#else
send_rumble_uart_frame(rumble);
#endif
}
#ifndef SWITCH_PICO_BLUEPAD32
// Consume UART bytes and forward complete frames to the Switch Pro driver.
static bool poll_uart_frames() {
static uint8_t buffer[64];
@ -134,6 +149,7 @@ static bool poll_uart_frames() {
return new_data;
}
#endif
static void log_usb_state() {
bool mounted = tud_mounted();
@ -153,7 +169,11 @@ int main() {
board_init();
stdio_init_all();
#ifdef SWITCH_PICO_BLUEPAD32
bluepad32_input_backend_init();
#else
init_uart_input();
#endif
tusb_init();
switch_pro_init();
@ -161,17 +181,32 @@ int main() {
g_user_state = neutral_input();
switch_pro_set_input(g_user_state);
#ifdef SWITCH_PICO_BLUEPAD32
bluepad32_input_backend_start();
LOG_PRINTF("[BOOT] switch-pico starting (Bluepad32 wireless @ 115200)\n");
#else
LOG_PRINTF("[BOOT] switch-pico starting (UART0 log @ 115200)\n");
LOG_PRINTF("[INFO] UART1 pins TX=%d RX=%d baud=%d\n",
UART_TX_PIN, UART_RX_PIN, BAUD_RATE);
#endif
while (true) {
tud_task(); // USB device tasks
#ifdef SWITCH_PICO_BLUEPAD32
bluepad32_input_backend_snapshot(&g_user_state);
#else
bool new_data = poll_uart_frames(); // Pull controller state from UART1
(void)new_data;
#endif
SwitchInputState state = g_user_state;
switch_pro_set_input(state);
switch_pro_task(); // Push state to the Switch host
#ifdef SWITCH_PICO_BLUEPAD32
if (switch_pro_task()) {
bluepad32_input_backend_report_sent();
}
#else
(void)switch_pro_task();
#endif
log_usb_state();
}
}