EMTime/libopencm3
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Added ROM to RAM code copy & exec with example of how to use it (miniblink_rom_to_ram).

Browse Source
This commit is contained in:
TitanMKD
2012-06-10 11:44:36 +02:00
parent d2b15c72be
commit 3c8e76f679
7 changed files with 273 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
examples/lpc43xx/hackrf-jellybean/jellybean-lpc4330_rom_to_ram.ld Normal file
View File

@@ -0,0 +1,35 @@
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2012 Benjamin Vernoux <titanmkd@gmail.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for HackRF Jellybean (LPC4330, 1M SPI flash, 264K SRAM). */
/* Define memory regions. */
MEMORY
{
/* Physical address in Flash used to copy Code from Flash to RAM */
rom_flash (rx) : ORIGIN = 0x80000000, LENGTH = 1M
/* rom is really the shadow region that points to SPI flash or elsewhere */
rom (rx) : ORIGIN = 0x00000000, LENGTH = 1M
ram (rwx) : ORIGIN = 0x10000000, LENGTH = 128K
/* there are some additional RAM regions */
}
/* Include the common ld script. */
INCLUDE libopencm3_lpc43xx_rom_to_ram.ld

24
examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/Makefile Normal file
View File

@@ -0,0 +1,24 @@
##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
##
## This library is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This library is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with this library. If not, see <http://www.gnu.org/licenses/>.
##
BINARY = miniblink
LDSCRIPT = ../jellybean-lpc4330_rom_to_ram.ld
include ../../Makefile.include

12
examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/README Normal file
View File

@@ -0,0 +1,12 @@
------------------------------------------------------------------------------
README
------------------------------------------------------------------------------
This is the smallest-possible example program using libopencm3.
It's intended for the Jellybean development board from the HackRF project:
https://github.com/mossmann/hackrf
It should blink LED1 on the board.
This example copy the Code from ROM to RAM and execute code from RAM.

82
examples/lpc43xx/hackrf-jellybean/miniblink_rom_to_ram/miniblink.c Normal file
View File

@@ -0,0 +1,82 @@
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2012 Michael Ossmann <mike@ossmann.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/lpc43xx/gpio.h>
#include <libopencm3/lpc43xx/scu.h>
#include "../jellybean_conf.h"
void gpio_setup(void)
{
/* Configure SCU Pin Mux as GPIO */
scu_pinmux(SCU_PINMUX_LED1, SCU_GPIO_FAST);
scu_pinmux(SCU_PINMUX_LED2, SCU_GPIO_FAST);
scu_pinmux(SCU_PINMUX_LED3, SCU_GPIO_FAST);
scu_pinmux(SCU_PINMUX_EN1V8, SCU_GPIO_FAST);
scu_pinmux(SCU_PINMUX_BOOT0, SCU_GPIO_FAST);
scu_pinmux(SCU_PINMUX_BOOT1, SCU_GPIO_FAST);
scu_pinmux(SCU_PINMUX_BOOT2, SCU_GPIO_FAST);
scu_pinmux(SCU_PINMUX_BOOT3, SCU_GPIO_FAST);
/* Configure all GPIO as Input (safe state) */
GPIO0_DIR = 0;
GPIO1_DIR = 0;
GPIO2_DIR = 0;
GPIO3_DIR = 0;
GPIO4_DIR = 0;
GPIO5_DIR = 0;
GPIO6_DIR = 0;
GPIO7_DIR = 0;
/* Configure GPIO as Output */
GPIO2_DIR |= (PIN_LED1|PIN_LED2|PIN_LED3); /* Configure GPIO2[1/2/8] (P4_1/2 P6_12) as output. */
GPIO3_DIR |= PIN_EN1V8; /* GPIO3[6] on P6_10 as output. */
}
u32 boot0, boot1, boot2, boot3;
int main(void)
{
int i;
gpio_setup();
/* Set 1V8 */
gpio_set(PORT_EN1V8, PIN_EN1V8);
/* Blink LED1/2/3 on the board and Read BOOT0/1/2/3 pins. */
while (1)
{
boot0 = BOOT0_STATE;
boot1 = BOOT1_STATE;
boot2 = BOOT2_STATE;
boot3 = BOOT3_STATE;
gpio_set(PORT_LED1_3, (PIN_LED1|PIN_LED2|PIN_LED3)); /* LEDs on */
for (i = 0; i < 2000000; i++) /* Wait a bit. */
__asm__("nop");
gpio_clear(PORT_LED1_3, (PIN_LED1|PIN_LED2|PIN_LED3)); /* LED off */
for (i = 0; i < 2000000; i++) /* Wait a bit. */
__asm__("nop");
}
return 0;
}