mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-07-07 21:18:10 +02:00
Refactor Rust drivers for strict idiomatic documentation and 8-line enforcement
This commit is contained in:
Kevin Thomas
@@ -0,0 +1,41 @@
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/**
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||||
* @file image_def.c
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* @brief RP2350 IMAGE_DEF block for boot ROM image recognition.
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* @author Kevin Thomas
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* @date 2026
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*
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* Must appear within the first 4 KB of flash for the boot ROM
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* to accept the image.
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*
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||||
* MIT License
|
||||
*
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||||
* Copyright (c) 2026 Kevin Thomas
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
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||||
*/
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#include <stdint.h>
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__attribute__((section(".embedded_block"), used))
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const uint8_t picobin_block[] = {
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0xD3, 0xDE, 0xFF, 0xFF,
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0x42, 0x01, 0x21, 0x10,
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0xFF, 0x01, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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0x79, 0x35, 0x12, 0xAB
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};
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@@ -0,0 +1,56 @@
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/**
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* @file main.c
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* @brief Repeating timer alarm demonstration.
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* @author Kevin Thomas
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* @date 2026
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*
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* Configures TIMER0 alarm 0 to fire a callback every 1 second.
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* The callback prints "Timer heartbeat" over UART. The main
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* loop idles with WFI.
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*
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* Wiring:
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* GPIO0 -> UART TX (USB-to-UART adapter RX)
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* GPIO1 -> UART RX (USB-to-UART adapter TX)
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* No external components required
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*
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* MIT License
|
||||
*
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||||
* Copyright (c) 2026 Kevin Thomas
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*
|
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* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
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*/
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#include "rp2350_timer.h"
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#include "rp2350_uart.h"
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/**
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* @brief Heartbeat callback invoked by TIMER0 alarm 0 IRQ.
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* @retval None
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*/
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static void heartbeat(void)
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{
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uart_puts("Timer heartbeat\r\n");
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}
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int main(void)
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{
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uart_puts("Timer alarm demo initialized\r\n");
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timer_alarm_start(1000, heartbeat);
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while (1)
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__asm__ volatile ("wfi");
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}
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@@ -0,0 +1,64 @@
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/**
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* @file rp2350_delay.c
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* @brief Delay driver implementation for RP2350.
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* @author Kevin Thomas
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* @date 2026
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*
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* Busy-wait millisecond and microsecond delays calibrated for
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* a 12 MHz clock.
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*
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* MIT License
|
||||
*
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||||
* Copyright (c) 2026 Kevin Thomas
|
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*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
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*/
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#include "rp2350_delay.h"
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void delay_ms(uint32_t ms)
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{
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if (ms == 0)
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return;
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__asm__ volatile (
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"mov r4, #3600\n\t"
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"mul r5, %0, r4\n\t"
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"1:\n\t"
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"subs r5, #1\n\t"
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"bne 1b\n\t"
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:
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: "r" (ms)
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: "r4", "r5", "cc"
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);
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}
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void delay_us(uint32_t us)
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{
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if (us == 0)
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return;
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__asm__ volatile (
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"mov r4, #4\n\t"
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"mul r5, %0, r4\n\t"
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"1:\n\t"
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"subs r5, #1\n\t"
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"bne 1b\n\t"
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:
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: "r" (us)
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: "r4", "r5", "cc"
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);
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}
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@@ -0,0 +1,41 @@
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/**
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* @file rp2350_reset.c
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* @brief Reset controller driver implementation for RP2350.
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* @author Kevin Thomas
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* @date 2026
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*
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* Releases IO_BANK0 from reset and waits until the subsystem
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* is ready.
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*
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* MIT License
|
||||
*
|
||||
* Copyright (c) 2026 Kevin Thomas
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*/
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#include "rp2350_reset.h"
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void reset_init_subsystem(void)
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{
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uint32_t value;
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value = RESETS->RESET;
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value &= ~(1U << RESETS_RESET_IO_BANK0_SHIFT);
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RESETS->RESET = value;
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while ((RESETS->RESET_DONE & (1U << RESETS_RESET_IO_BANK0_SHIFT)) == 0) {}
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}
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@@ -0,0 +1,88 @@
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/**
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* @file rp2350_reset_handler.c
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* @brief Reset handler implementation for RP2350.
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* @author Kevin Thomas
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* @date 2026
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*
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* Entry point after power-on or system reset. Initializes the
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* stack, XOSC, subsystem resets, UART, TIMER0 tick
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* generator, then branches to main().
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*
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||||
* MIT License
|
||||
*
|
||||
* Copyright (c) 2026 Kevin Thomas
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*/
|
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#include "rp2350_reset_handler.h"
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#include "rp2350_stack.h"
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#include "rp2350_xosc.h"
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#include "rp2350_reset.h"
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#include "rp2350_uart.h"
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#include "rp2350_timer.h"
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extern int main(void);
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extern uint32_t __data_lma;
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extern uint32_t __data_start;
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extern uint32_t __data_end;
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extern uint32_t __bss_start;
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extern uint32_t __bss_end;
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static void _data_copy_init(void)
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{
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uint32_t *src = &__data_lma;
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uint32_t *dst = &__data_start;
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while (dst < &__data_end)
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*dst++ = *src++;
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}
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static void _bss_zero_init(void)
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{
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uint32_t *dst = &__bss_start;
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while (dst < &__bss_end)
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*dst++ = 0U;
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}
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void _ram_init(void)
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{
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stack_init();
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_data_copy_init();
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_bss_zero_init();
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}
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void _late_init(void)
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{
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timer_release_reset();
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timer_tick_init();
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}
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void __attribute__((naked, noreturn)) Reset_Handler(void)
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{
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__asm__ volatile (
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"bl _ram_init\n\t"
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"bl xosc_init\n\t"
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"bl xosc_enable_peri_clk\n\t"
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"bl reset_init_subsystem\n\t"
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"bl uart_release_reset\n\t"
|
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"bl uart_init\n\t"
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"bl _late_init\n\t"
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"b main\n\t"
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);
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}
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@@ -0,0 +1,47 @@
|
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/**
|
||||
* @file rp2350_stack.c
|
||||
* @brief Stack pointer initialization for RP2350.
|
||||
* @author Kevin Thomas
|
||||
* @date 2026
|
||||
*
|
||||
* Sets MSP, PSP, MSPLIM, and PSPLIM using inline assembly.
|
||||
*
|
||||
* MIT License
|
||||
*
|
||||
* Copyright (c) 2026 Kevin Thomas
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*/
|
||||
#include "rp2350_stack.h"
|
||||
|
||||
void stack_init(void)
|
||||
{
|
||||
__asm__ volatile (
|
||||
"ldr r0, =%0\n\t"
|
||||
"msr PSP, r0\n\t"
|
||||
"ldr r0, =%1\n\t"
|
||||
"msr MSPLIM, r0\n\t"
|
||||
"msr PSPLIM, r0\n\t"
|
||||
"ldr r0, =%0\n\t"
|
||||
"msr MSP, r0\n\t"
|
||||
:
|
||||
: "i" (STACK_TOP), "i" (STACK_LIMIT)
|
||||
: "r0"
|
||||
);
|
||||
}
|
||||
@@ -0,0 +1,140 @@
|
||||
/**
|
||||
* @file rp2350_timer.c
|
||||
* @brief TIMER0 alarm driver implementation for RP2350.
|
||||
* @author Kevin Thomas
|
||||
* @date 2026
|
||||
*
|
||||
* Configures the TIMER0 tick generator for 1 us resolution
|
||||
* from the 12 MHz CLK_REF, then uses alarm 0 with NVIC IRQ
|
||||
* to implement a repeating callback at a configurable period.
|
||||
*
|
||||
* MIT License
|
||||
*
|
||||
* Copyright (c) 2026 Kevin Thomas
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*/
|
||||
#include "rp2350_timer.h"
|
||||
|
||||
/**
|
||||
* @brief User callback and period stored for ISR re-arm.
|
||||
*/
|
||||
static timer_callback_t user_callback;
|
||||
|
||||
/**
|
||||
* @brief Alarm period in microseconds for re-arming.
|
||||
*/
|
||||
static uint32_t alarm_period_us;
|
||||
|
||||
/**
|
||||
* @brief Clear the TIMER0 reset bit in the reset controller.
|
||||
* @retval None
|
||||
*/
|
||||
static void timer_clear_reset_bit(void)
|
||||
{
|
||||
uint32_t value;
|
||||
value = RESETS->RESET;
|
||||
value &= ~(1U << RESETS_RESET_TIMER0_SHIFT);
|
||||
RESETS->RESET = value;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Wait until the TIMER0 block is out of reset.
|
||||
* @retval None
|
||||
*/
|
||||
static void timer_wait_reset_done(void)
|
||||
{
|
||||
while ((RESETS->RESET_DONE & (1U << RESETS_RESET_TIMER0_SHIFT)) == 0) {}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Set the TIMER0 tick generator cycle count to 12.
|
||||
* @retval None
|
||||
*/
|
||||
static void timer_set_tick_cycles(void)
|
||||
{
|
||||
TICKS_TIMER0->CYCLES = TICKS_TIMER0_CYCLES_12MHZ;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Enable the TIMER0 tick generator.
|
||||
* @retval None
|
||||
*/
|
||||
static void timer_enable_tick(void)
|
||||
{
|
||||
TICKS_TIMER0->CTRL = (1U << TICKS_CTRL_ENABLE_SHIFT);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Enable the alarm 0 interrupt in TIMER0 INTE register.
|
||||
* @retval None
|
||||
*/
|
||||
static void timer_enable_alarm_irq(void)
|
||||
{
|
||||
TIMER0->INTE = (1U << TIMER_INTE_ALARM0_SHIFT);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Enable TIMER0_IRQ_0 in the NVIC.
|
||||
* @retval None
|
||||
*/
|
||||
static void timer_enable_nvic(void)
|
||||
{
|
||||
*NVIC_ISER0 = (1U << TIMER0_ALARM0_IRQ);
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Arm alarm 0 with the next target time.
|
||||
* @retval None
|
||||
*/
|
||||
static void timer_arm_alarm(void)
|
||||
{
|
||||
uint32_t target;
|
||||
target = TIMER0->TIMERAWL + alarm_period_us;
|
||||
TIMER0->ALARM0 = target;
|
||||
}
|
||||
|
||||
void timer_release_reset(void)
|
||||
{
|
||||
timer_clear_reset_bit();
|
||||
timer_wait_reset_done();
|
||||
}
|
||||
|
||||
void timer_tick_init(void)
|
||||
{
|
||||
timer_set_tick_cycles();
|
||||
timer_enable_tick();
|
||||
}
|
||||
|
||||
void timer_alarm_start(uint32_t period_ms, timer_callback_t cb)
|
||||
{
|
||||
user_callback = cb;
|
||||
alarm_period_us = period_ms * 1000U;
|
||||
timer_enable_alarm_irq();
|
||||
timer_enable_nvic();
|
||||
timer_arm_alarm();
|
||||
}
|
||||
|
||||
void TIMER0_IRQ_0_Handler(void)
|
||||
{
|
||||
TIMER0->INTR = TIMER_INTR_ALARM0_MASK;
|
||||
timer_arm_alarm();
|
||||
if (user_callback)
|
||||
user_callback();
|
||||
}
|
||||
@@ -0,0 +1,134 @@
|
||||
/**
|
||||
* @file rp2350_uart.c
|
||||
* @brief UART0 driver implementation for RP2350.
|
||||
* @author Kevin Thomas
|
||||
* @date 2026
|
||||
*
|
||||
* Configures UART0 on GPIO 0 (TX) and GPIO 1 (RX) at 115200
|
||||
* baud using the 12 MHz XOSC clock.
|
||||
*
|
||||
* MIT License
|
||||
*
|
||||
* Copyright (c) 2026 Kevin Thomas
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*/
|
||||
#include "rp2350_uart.h"
|
||||
|
||||
/** @brief Base address pointer for UART0 peripheral registers */
|
||||
#define UART_BASE ((volatile uint32_t *) UART0_BASE)
|
||||
|
||||
/**
|
||||
* @brief Clear the UART0 reset bit in the reset controller.
|
||||
* @retval None
|
||||
*/
|
||||
static void uart_clear_reset_bit(void)
|
||||
{
|
||||
uint32_t value;
|
||||
value = RESETS->RESET;
|
||||
value &= ~(1U << RESETS_RESET_UART0_SHIFT);
|
||||
RESETS->RESET = value;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Wait until the UART0 block is out of reset.
|
||||
* @retval None
|
||||
*/
|
||||
static void uart_wait_reset_done(void)
|
||||
{
|
||||
while ((RESETS->RESET_DONE & (1U << RESETS_RESET_UART0_SHIFT)) == 0) {}
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Configure GPIO pins 0 (TX) and 1 (RX) for UART function.
|
||||
* @retval None
|
||||
*/
|
||||
static void uart_configure_pins(void)
|
||||
{
|
||||
IO_BANK0->GPIO[0].CTRL = IO_BANK0_CTRL_FUNCSEL_UART;
|
||||
IO_BANK0->GPIO[1].CTRL = IO_BANK0_CTRL_FUNCSEL_UART;
|
||||
PADS_BANK0->GPIO[0] = 0x04;
|
||||
PADS_BANK0->GPIO[1] = 0x40;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Set UART0 baud rate divisors for 115200 at 12 MHz.
|
||||
* @retval None
|
||||
*/
|
||||
static void uart_set_baud(void)
|
||||
{
|
||||
UART_BASE[UART_CR_OFFSET] = 0;
|
||||
UART_BASE[UART_IBRD_OFFSET] = 6;
|
||||
UART_BASE[UART_FBRD_OFFSET] = 33;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Configure line control and enable UART0.
|
||||
* @retval None
|
||||
*/
|
||||
static void uart_enable(void)
|
||||
{
|
||||
UART_BASE[UART_LCR_H_OFFSET] = UART_LCR_H_8N1_FIFO;
|
||||
UART_BASE[UART_CR_OFFSET] = UART_CR_ENABLE;
|
||||
}
|
||||
|
||||
void uart_release_reset(void)
|
||||
{
|
||||
uart_clear_reset_bit();
|
||||
uart_wait_reset_done();
|
||||
}
|
||||
|
||||
void uart_init(void)
|
||||
{
|
||||
uart_configure_pins();
|
||||
uart_set_baud();
|
||||
uart_enable();
|
||||
}
|
||||
|
||||
bool uart_is_readable(void)
|
||||
{
|
||||
return (UART_BASE[UART_FR_OFFSET] & UART_FR_RXFE_MASK) == 0;
|
||||
}
|
||||
|
||||
char uart_getchar(void)
|
||||
{
|
||||
while (UART_BASE[UART_FR_OFFSET] & UART_FR_RXFE_MASK) {}
|
||||
return (char)(UART_BASE[UART_DR_OFFSET] & 0xFF);
|
||||
}
|
||||
|
||||
void uart_putchar(char c)
|
||||
{
|
||||
while (UART_BASE[UART_FR_OFFSET] & UART_FR_TXFF_MASK) {}
|
||||
UART_BASE[UART_DR_OFFSET] = (uint32_t)c;
|
||||
}
|
||||
|
||||
void uart_puts(const char *str)
|
||||
{
|
||||
while (*str)
|
||||
{
|
||||
uart_putchar(*str++);
|
||||
}
|
||||
}
|
||||
|
||||
char uart_to_upper(char c)
|
||||
{
|
||||
if (c >= 'a' && c <= 'z')
|
||||
return (char)(c - 32);
|
||||
return c;
|
||||
}
|
||||
@@ -0,0 +1,54 @@
|
||||
/**
|
||||
* @file rp2350_xosc.c
|
||||
* @brief XOSC driver implementation for RP2350.
|
||||
* @author Kevin Thomas
|
||||
* @date 2026
|
||||
*
|
||||
* Configures the external crystal oscillator and enables the
|
||||
* peripheral clock sourced from XOSC.
|
||||
*
|
||||
* MIT License
|
||||
*
|
||||
* Copyright (c) 2026 Kevin Thomas
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*/
|
||||
#include "rp2350_xosc.h"
|
||||
|
||||
void xosc_init(void)
|
||||
{
|
||||
XOSC->STARTUP = 0x00C4U;
|
||||
XOSC->CTRL = 0x00FABAA0U;
|
||||
while ((XOSC->STATUS & (1U << XOSC_STATUS_STABLE_SHIFT)) == 0) {}
|
||||
}
|
||||
|
||||
void xosc_enable_peri_clk(void)
|
||||
{
|
||||
uint32_t value;
|
||||
value = CLOCKS->CLK_PERI_CTRL;
|
||||
value &= ~CLK_PERI_CTRL_AUXSRC_MASK;
|
||||
value |= (1U << CLK_PERI_CTRL_ENABLE_SHIFT);
|
||||
value |= (CLK_PERI_CTRL_AUXSRC_XOSC << CLK_PERI_CTRL_AUXSRC_SHIFT);
|
||||
CLOCKS->CLK_PERI_CTRL = value;
|
||||
}
|
||||
|
||||
void xosc_set_clk_ref(void)
|
||||
{
|
||||
CLOCKS->CLK_REF_CTRL = CLK_REF_CTRL_SRC_XOSC;
|
||||
}
|
||||
@@ -0,0 +1,71 @@
|
||||
/**
|
||||
* @file vector_table.c
|
||||
* @brief Vector table with initial stack pointer, reset handler, and
|
||||
* @author Kevin Thomas
|
||||
* @date 2026
|
||||
*
|
||||
* TIMER0 alarm 0 IRQ handler.
|
||||
*
|
||||
* Placed in the .vectors section at the start of flash.
|
||||
* The Thumb bit (bit 0 = 1) is automatically set by the
|
||||
* linker for function pointers in Thumb mode.
|
||||
*
|
||||
* MIT License
|
||||
*
|
||||
* Copyright (c) 2026 Kevin Thomas
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
* SOFTWARE.
|
||||
*/
|
||||
#include <stdint.h>
|
||||
|
||||
extern uint32_t _stack_top;
|
||||
extern void Reset_Handler(void);
|
||||
extern void TIMER0_IRQ_0_Handler(void);
|
||||
|
||||
/**
|
||||
* @brief Default handler for unused exceptions (infinite loop).
|
||||
* @retval None
|
||||
*/
|
||||
static void default_handler(void)
|
||||
{
|
||||
while (1) {}
|
||||
}
|
||||
|
||||
typedef void (*vector_func_t)(void);
|
||||
|
||||
__attribute__((section(".vectors"), used))
|
||||
const void *_vectors[17] = {
|
||||
&_stack_top, // 0: Initial stack pointer
|
||||
Reset_Handler, // 1: Reset
|
||||
default_handler, // 2: NMI
|
||||
default_handler, // 3: HardFault
|
||||
default_handler, // 4: MemManage
|
||||
default_handler, // 5: BusFault
|
||||
default_handler, // 6: UsageFault
|
||||
default_handler, // 7: SecureFault
|
||||
0, // 8: Reserved
|
||||
0, // 9: Reserved
|
||||
0, // 10: Reserved
|
||||
default_handler, // 11: SVCall
|
||||
default_handler, // 12: DebugMon
|
||||
0, // 13: Reserved
|
||||
default_handler, // 14: PendSV
|
||||
default_handler, // 15: SysTick
|
||||
TIMER0_IRQ_0_Handler, // 16: IRQ 0 — TIMER0_IRQ_0
|
||||
};
|
||||
Reference in New Issue
Block a user