mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-08-20 01:47:29 +02:00
Initial commit with strict idiomatic rust enforcement
This commit is contained in:
Kevin Thomas
@@ -0,0 +1,41 @@
|
||||
/**
|
||||
* @file image_def.c
|
||||
* @brief RP2350 IMAGE_DEF block for boot ROM image recognition.
|
||||
* @author Kevin Thomas
|
||||
* @date 2026
|
||||
*
|
||||
* Must appear within the first 4 KB of flash for the boot ROM
|
||||
* to accept the image.
|
||||
*
|
||||
* 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 <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 +1,53 @@
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||||
/**
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* @file main.c
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||||
* @brief UART demonstration: echo received characters in uppercase.
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* @author Kevin Thomas
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* @date 2026
|
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*
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* Demonstrates hardware UART0 using the bare-metal UART driver.
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* Characters typed into a terminal via a USB-to-UART adapter
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||||
* are echoed back in uppercase.
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||||
*
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* Wiring:
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* GPIO0 (TX) -> USB-to-UART adapter RX
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* GPIO1 (RX) -> USB-to-UART adapter TX
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||||
* GND -> USB-to-UART adapter GND
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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_uart.h"
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int main(void)
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{
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uart_puts("UART driver ready (115200 8N1)\r\n");
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uart_puts("Type characters to echo them back in UPPERCASE:\r\n");
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while (1)
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{
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if (uart_is_readable())
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{
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char c = uart_getchar();
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char upper = uart_to_upper(c);
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uart_putchar(upper);
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}
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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
|
||||
* is ready.
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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.
|
||||
*/
|
||||
#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 +1,80 @@
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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, then branches
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||||
* to main().
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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.
|
||||
*/
|
||||
#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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||||
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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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||||
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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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||||
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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)
|
||||
*dst++ = 0U;
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||||
}
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||||
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||||
void _ram_init(void)
|
||||
{
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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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||||
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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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"b main\n\t"
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);
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}
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@@ -0,0 +1,47 @@
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||||
/**
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||||
* @file rp2350_stack.c
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* @brief Stack pointer initialization for RP2350.
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||||
* @author Kevin Thomas
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||||
* @date 2026
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||||
*
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* Sets MSP, PSP, MSPLIM, and PSPLIM using inline assembly.
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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.
|
||||
*/
|
||||
#include "rp2350_stack.h"
|
||||
|
||||
void stack_init(void)
|
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{
|
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__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 +1,134 @@
|
||||
/**
|
||||
* @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 +1,48 @@
|
||||
/**
|
||||
* @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 |= (1U << CLK_PERI_CTRL_ENABLE_SHIFT);
|
||||
value |= (CLK_PERI_CTRL_AUXSRC_XOSC << CLK_PERI_CTRL_AUXSRC_SHIFT);
|
||||
CLOCKS->CLK_PERI_CTRL = value;
|
||||
}
|
||||
@@ -0,0 +1,44 @@
|
||||
/**
|
||||
* @file vector_table.c
|
||||
* @brief Vector table with initial stack pointer and reset handler.
|
||||
* @author Kevin Thomas
|
||||
* @date 2026
|
||||
*
|
||||
* 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);
|
||||
|
||||
typedef void (*vector_func_t)(void);
|
||||
|
||||
__attribute__((section(".vectors"), used))
|
||||
const void *_vectors[2] = {
|
||||
&_stack_top,
|
||||
Reset_Handler
|
||||
};
|
||||
Reference in New Issue
Block a user