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Rename F1 examples folder.

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This commit is contained in:
Fergus Noble
2011-09-15 01:20:45 -07:00
committed by Stephen Caudle
parent ce7dd46aef
commit cff706e3ca
173 changed files with 127 additions and 0 deletions
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23
examples/stm32f1/other/adc_temperature_sensor/Makefile Normal file
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##
## This file is part of the libopencm3 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 = adc
include ../../Makefile.include

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examples/stm32f1/other/adc_temperature_sensor/README Normal file
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------------------------------------------------------------------------------
README
------------------------------------------------------------------------------
This example program sends some characters on USART1.
Afterwards it read out the internal temperature sensor of the STM32 and
sends the value read out from the ADC to the USART1.
The terminal settings for the receiving device/PC are 115200 8n1.

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examples/stm32f1/other/adc_temperature_sensor/adc.c Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
*
* 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 <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/flash.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/usart.h>
#include <libopencm3/stm32/adc.h>
void usart_setup(void)
{
/* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN);
/* Setup GPIO pin GPIO_USART1_TX/GPIO9 on GPIO port A for transmit. */
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX);
/* Setup UART parameters. */
usart_set_baudrate(USART1, 115200);
usart_set_databits(USART1, 8);
usart_set_stopbits(USART1, USART_STOPBITS_1);
usart_set_mode(USART1, USART_MODE_TX_RX);
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)
{
/* Enable GPIOB clock. */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
/* Set GPIO6/7 (in GPIO port B) to 'output push-pull' for the LEDs. */
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO6);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO7);
}
void adc_setup(void)
{
int i;
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_ADC1EN);
/* Make shure it doesn't run during config. */
adc_off(ADC1);
/* We configure everything for one single conversion. */
adc_disable_scan_mode(ADC1);
adc_set_single_conversion_mode(ADC1);
adc_enable_discontinous_mode_regular(ADC1);
adc_disable_external_trigger_regular(ADC1);
adc_set_right_aligned(ADC1);
/* We want to read the temperature sensor, so we have to enable it. */
adc_enable_temperature_sensor(ADC1);
adc_set_conversion_time_on_all_channels(ADC1, ADC_SMPR_SMP_28DOT5CYC);
adc_on(ADC1);
/* Wait for ADC starting up. */
for (i = 0; i < 800000; i++) /* Wait a bit. */
__asm__("nop");
adc_reset_calibration(ADC1);
adc_calibration(ADC1);
}
void my_usart_print_int(u32 usart, int value)
{
s8 i;
u8 nr_digits = 0;
char buffer[25];
if (value < 0) {
usart_send(usart, '-');
value = value * -1;
}
while (value > 0) {
buffer[nr_digits++] = "0123456789"[value % 10];
value /= 10;
}
for (i = nr_digits; i >= 0; i--)
usart_send(usart, buffer[i]);
}
int main(void)
{
u8 channel_array[16];
u16 temperature;
rcc_clock_setup_in_hse_16mhz_out_72mhz();
gpio_setup();
usart_setup();
adc_setup();
gpio_clear(GPIOB, GPIO7); /* LED1 on */
gpio_set(GPIOB, GPIO6); /* LED2 off */
/* Send a message on USART1. */
usart_send(USART1, 's');
usart_send(USART1, 't');
usart_send(USART1, 'm');
usart_send(USART1, '\r');
usart_send(USART1, '\n');
/* Select the channel we want to convert. 16=temperature_sensor. */
channel_array[0] = 16;
adc_set_regular_sequence(ADC1, 1, channel_array);
/*
* If the ADC_CR2_ON bit is already set -> setting it another time
* starts the conversion.
*/
adc_on(ADC1);
/* Wait for end of conversion. */
while (!(ADC_SR(ADC1) & ADC_SR_EOC));
temperature = ADC_DR(ADC1);
/*
* That's actually not the real temperature - you have to compute it
* as described in the datasheet.
*/
my_usart_print_int(USART1, temperature);
gpio_clear(GPIOB, GPIO6); /* LED2 on */
while(1); /* Halt. */
return 0;
}

31
examples/stm32f1/other/adc_temperature_sensor/adc.ld Normal file
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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
*
* 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 an STM32F103RBT6 board (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. */
INCLUDE libopencm3_stm32.ld