79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
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/**================================================== *
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* ============= Initial Board Setup ============== *
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* ================================================== */
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#include "main.h"
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/* ================================================== *
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* Perform initial UART setup
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* ================================================== */
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void serial_init() {
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/* Set up our UART with a default baudrate. */
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uart_init(SERIAL_UART, SERIAL_BAUDRATE);
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/* Set UART flow control CTS/RTS. We don't have these - turn them off.*/
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uart_set_hw_flow(SERIAL_UART, false, false);
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/* Set our data format */
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uart_set_format(SERIAL_UART, SERIAL_DATA_BITS, SERIAL_STOP_BITS, SERIAL_PARITY);
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/* Turn of CRLF translation */
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uart_set_translate_crlf(SERIAL_UART, false);
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/* We do want FIFO, will help us have fewer interruptions */
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uart_set_fifo_enabled(SERIAL_UART, true);
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/* Set the RX/TX pins, they differ based on the device role (A or B, check
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/* schematics) */
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gpio_set_function(SERIAL_TX_PIN, GPIO_FUNC_UART);
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gpio_set_function(SERIAL_RX_PIN, GPIO_FUNC_UART);
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}
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/* ================================================== *
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* PIO USB configuration, D+ pin 14, D- pin 15
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* ================================================== */
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usb_device_t* pio_usb_init(void) {
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static pio_usb_configuration_t config = PIO_USB_DEFAULT_CONFIG;
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config.pin_dp = 14;
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config.alarm_pool = (void*)alarm_pool_create(2, 1);
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return pio_usb_host_init(&config);
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}
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/* ================================================== *
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* Perform initial board/usb setup
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* ================================================== */
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usb_device_t* initial_setup(void) {
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/* PIO USB requires a clock multiple of 12 MHz, setting to 120 MHz */
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set_sys_clock_khz(120000, true);
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/* Init and enable the on-board LED GPIO as output */
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gpio_init(GPIO_LED_PIN);
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gpio_set_dir(GPIO_LED_PIN, GPIO_OUT);
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/* Initialize and configure UART */
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serial_init();
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/* Initialize and configure TinyUSB */
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tusb_init();
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/* Setup RP2040 Core 1 */
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multicore_reset_core1();
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multicore_launch_core1(core1_main);
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/* Initialize and configure PIO USB */
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usb_device_t* pio_usb_device = pio_usb_init();
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/* Update the core1 initial pass timestamp before enabling the watchdog */
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global_state.core1_last_loop_pass = time_us_64();
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/* Setup the watchdog so we reboot and recover from a crash */
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watchdog_enable(WATCHDOG_TIMEOUT, WATCHDOG_PAUSE_ON_DEBUG);
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return pio_usb_device;
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}
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/* ========== End of Initial Board Setup ========== */
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