jackcartersmith/blackmagic
1
0
Fork 0
Code Issues Pull Requests Releases Activity

Added usart test version for obldc.

Browse Source
This commit is contained in:
Piotr Esden-Tempski 2010-12-21 20:55:04 +01:00
parent 45e57fa51e
commit 77fbe48a5e
4 changed files with 152 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
examples/obldc/Makefile
View File

@ -24,7 +24,7 @@ Q := @
MAKEFLAGS += --no-print-directory
endif
all: led systick
all: led systick usart
led:
@printf " BUILD examples/obldc/led\n"
@ -34,11 +34,17 @@ systick:
@printf " BUILD examples/obldc/systick\n"
$(Q)$(MAKE) -C systick
usart:
@printf " BUILD examples/obldc/usart\n"
$(Q)$(MAKE) -C usart
clean:
@printf " CLEAN examples/obldc/led\n"
$(Q)$(MAKE) -C led clean
@printf " CLEAN examples/obldc/systick\n"
$(Q)$(MAKE) -C systick clean
@printf " CLEAN examples/obldc/usart\n"
$(Q)$(MAKE) -C usart clean
.PHONY: led systick
.PHONY: led systick usart

22
examples/obldc/usart/Makefile Normal file
View File

@ -0,0 +1,22 @@
##
## This file is part of the libopenstm32 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
##
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This program 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 General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program. If not, see <http://www.gnu.org/licenses/>.
##
BINARY = usart
include ../../Makefile.include

91
examples/obldc/usart/usart.c Normal file
View File

@ -0,0 +1,91 @@
/*
* This file is part of the libopenstm32 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopenstm32/rcc.h>
#include <libopenstm32/gpio.h>
#include <libopenstm32/usart.h>
void clock_setup(void)
{
rcc_clock_setup_in_hse_8mhz_out_72mhz();
/* Enable GPIOA clock. For LED gpio's */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
/* Enable clocks for GPIO port B (for GPIO_USART1_TX) and USART1. */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN);
}
void usart_setup(void)
{
/* Setup GPIO6 (in GPIO port A) to 'output push-pull' for led use. */
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL,
GPIO6);
AFIO_MAPR |= AFIO_MAPR_USART1_REMAP;
/* Setup GPIO pin GPIO_USART3_TX/GPIO10 on GPIO port B for transmit. */
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_RE_TX);
/* Setup UART parameters. */
usart_set_baudrate(USART1, 230400);
usart_set_databits(USART1, 8);
usart_set_stopbits(USART1, USART_STOPBITS_1);
usart_set_mode(USART1, USART_MODE_TX);
usart_set_parity(USART1, USART_PARITY_NONE);
usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
/* Finally enable the USART. */
usart_enable(USART1);
}
void gpio_setup(void)
{
/* Set GPIO12 (in GPIO port C) to 'output push-pull'. */
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO6);
}
int main(void)
{
int i, j = 0, c = 0;
clock_setup();
gpio_setup();
usart_setup();
/* Blink the LED (PC12) on the board with every transmitted byte. */
while (1) {
gpio_toggle(GPIOA, GPIO6); /* LED on/off */
usart_send(USART1, c + '0'); /* Send one byte on USART3. */
c = (c == 9) ? 0 : c + 1; /* Increment c. */
if ((j++ % 80) == 0) { /* Newline after line full. */
usart_send(USART1, '\r');
usart_send(USART1, '\n');
}
for (i = 0; i < 80000; i++); /* Wait (needs -O0 CFLAGS). */
}
return 0;
}

31
examples/obldc/usart/usart.ld Normal file
View File

@ -0,0 +1,31 @@
/*
* This file is part of the libopenstm32 project.
*
* Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Linker script for Open-BLDC (STM32F103CBT6, 128K flash, 20K RAM). */
/* Define memory regions. */
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
}
/* Include the common ld script from libopenstm32. */
INCLUDE libopenstm32.ld