aboutsummaryrefslogtreecommitdiff
path: root/examples/other/i2c_stts75_sensor
diff options
context:
space:
mode:
authorUwe Hermann2010-12-30 01:52:44 +0100
committerUwe Hermann2010-12-30 01:52:44 +0100
commitbcce98da54b047a15ef0abf41e0c7794f29f0439 (patch)
tree98462dcb9874341bd7342a1794ec01e8ad420d47 /examples/other/i2c_stts75_sensor
parentb65f3f06d061823fac1af91594e0d702b4c80693 (diff)
Move STM32 examples to examples/stm32 subdir.
Diffstat (limited to 'examples/other/i2c_stts75_sensor')
-rw-r--r--examples/other/i2c_stts75_sensor/Makefile25
-rw-r--r--examples/other/i2c_stts75_sensor/README13
-rw-r--r--examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c146
-rw-r--r--examples/other/i2c_stts75_sensor/i2c_stts75_sensor.ld31
-rw-r--r--examples/other/i2c_stts75_sensor/stts75.c186
-rw-r--r--examples/other/i2c_stts75_sensor/stts75.h39
6 files changed, 0 insertions, 440 deletions
diff --git a/examples/other/i2c_stts75_sensor/Makefile b/examples/other/i2c_stts75_sensor/Makefile
deleted file mode 100644
index 32ee066..0000000
--- a/examples/other/i2c_stts75_sensor/Makefile
+++ /dev/null
@@ -1,25 +0,0 @@
-##
-## 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 = i2c_stts75_sensor
-
-OBJS = stts75.o
-
-include ../../Makefile.include
-
diff --git a/examples/other/i2c_stts75_sensor/README b/examples/other/i2c_stts75_sensor/README
deleted file mode 100644
index 91e3ff6..0000000
--- a/examples/other/i2c_stts75_sensor/README
+++ /dev/null
@@ -1,13 +0,0 @@
-------------------------------------------------------------------------------
-README
-------------------------------------------------------------------------------
-
-This example program sends some characters on USART1.
-Afterwards it connects to an STTS75 sensor (ST LM75 compatible)
-at adress A0/1/2=0 and sets reverse polarity, 26 degree Tos and Thyst.
-
-It reads out the temperature and submits the temperature over USART1 in
-binary format (ASCII 0/1).
-
-The terminal settings for the receiving device/PC are 115200 8n1.
-
diff --git a/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c b/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c
deleted file mode 100644
index 1227fd1..0000000
--- a/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.c
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
- * This file is part of the libopenstm32 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 <libopenstm32/rcc.h>
-#include <libopenstm32/flash.h>
-#include <libopenstm32/gpio.h>
-#include <libopenstm32/usart.h>
-#include <libopenstm32/i2c.h>
-#include "stts75.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 i2c_setup(void)
-{
- /* Enable clocks for I2C2 and AFIO. */
- rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_I2C2EN);
- rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_AFIOEN);
-
- /* Set alternate functions for the SCL and SDA pins of I2C2. */
- gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
- GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN,
- GPIO_I2C2_SCL | GPIO_I2C2_SDA);
-
- /* Disable the I2C before changing any configuration. */
- i2c_peripheral_disable(I2C2);
-
- /* APB1 is running at 36MHz. */
- i2c_set_clock_frequency(I2C2, I2C_CR2_FREQ_36MHZ);
-
- /* 400KHz - I2C Fast Mode */
- i2c_set_fast_mode(I2C2);
-
- /*
- * fclock for I2C is 36MHz APB2 -> cycle time 28ns, low time at 400KHz
- * incl trise -> Thigh= 1600ns; CCR= tlow/tcycle= 0x1C,9;
- * datasheet suggests 0x1e.
- */
- i2c_set_ccr(I2C2, 0x1e);
-
- /*
- * fclock for I2C is 36MHz -> cycle time 28ns, rise time for
- * 400KHz => 300ns and 100KHz => 1000ns; 300ns/28ns = 10;
- * incremented by 1 -> 11.
- */
- i2c_set_trise(I2C2, 0x0b);
-
- /*
- * This is our slave address - needed only if we want to receive from
- * other masters.
- */
- i2c_set_own_7bit_slave_address(I2C2, 0x32);
-
- /* If everything is configured -> enable the peripheral. */
- i2c_peripheral_enable(I2C2);
-}
-
-int main(void)
-{
- int i = 0;
- u16 temperature;
-
- rcc_clock_setup_in_hse_16mhz_out_72mhz();
- gpio_setup();
- usart_setup();
- i2c_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');
-
- stts75_write_config(I2C2, STTS75_SENSOR0);
- stts75_write_temp_os(I2C2, STTS75_SENSOR0, 0x1a00); /* 26 degrees */
- stts75_write_temp_hyst(I2C2, STTS75_SENSOR0, 0x1a00);
- temperature = stts75_read_temperature(I2C2, STTS75_SENSOR0);
-
- /* Send the temperature as binary over USART1. */
- for (i = 15; i >= 0 ; i--) {
- if (temperature & (1 << i))
- usart_send(USART1, '1');
- else
- usart_send(USART1, '0');
- }
-
- usart_send(USART1, '\r');
- usart_send(USART1, '\n');
-
- gpio_clear(GPIOB, GPIO6); /* LED2 on */
-
- while(1); /* Halt. */
-
- return 0;
-}
diff --git a/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.ld b/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.ld
deleted file mode 100644
index a1e9de5..0000000
--- a/examples/other/i2c_stts75_sensor/i2c_stts75_sensor.ld
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * This file is part of the libopenstm32 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 from libopenstm32. */
-INCLUDE libopenstm32.ld
-
diff --git a/examples/other/i2c_stts75_sensor/stts75.c b/examples/other/i2c_stts75_sensor/stts75.c
deleted file mode 100644
index 319394f..0000000
--- a/examples/other/i2c_stts75_sensor/stts75.c
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * This file is part of the libopenstm32 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 <libopenstm32/i2c.h>
-#include "stts75.h"
-
-void stts75_write_config(u32 i2c, u8 sensor)
-{
- u32 reg32;
-
- /* Send START condition. */
- i2c_send_start(i2c);
-
- /* Waiting for START is send and switched to master mode. */
- while (!((I2C_SR1(i2c) & I2C_SR1_SB)
- & (I2C_SR2(i2c) & (I2C_SR2_MSL | I2C_SR2_BUSY))));
-
- /* Send destination address. */
- i2c_send_7bit_address(i2c, sensor, I2C_WRITE);
-
- /* Waiting for address is transferred. */
- while (!(I2C_SR1(i2c) & I2C_SR1_ADDR));
-
- /* Cleaning ADDR condition sequence. */
- reg32 = I2C_SR2(i2c);
-
- /* Sending the data. */
- i2c_send_data(i2c, 0x1); /* stts75 config register */
- while (!(I2C_SR1(i2c) & I2C_SR1_BTF)); /* Await ByteTransferedFlag. */
- i2c_send_data(i2c, 0x4); /* pol reverse - LED glows if temp is below Tos/Thyst */
- while (!(I2C_SR1(i2c) & (I2C_SR1_BTF | I2C_SR1_TxE)));
-
- /* Send STOP condition. */
- i2c_send_stop(i2c);
-}
-
-void stts75_write_temp_os(u32 i2c, u8 sensor, u16 temp_os)
-{
- u32 reg32;
-
- /* Send START condition. */
- i2c_send_start(i2c);
-
- /* Waiting for START is send and switched to master mode. */
- while (!((I2C_SR1(i2c) & I2C_SR1_SB)
- & (I2C_SR2(i2c) & (I2C_SR2_MSL | I2C_SR2_BUSY))));
-
- /* Send destination address. */
- i2c_send_7bit_address(i2c, sensor, I2C_WRITE);
-
- /* Waiting for address is transferred. */
- while (!(I2C_SR1(i2c) & I2C_SR1_ADDR));
-
- /* Cleaning ADDR condition sequence. */
- reg32 = I2C_SR2(i2c);
-
- /* Sending the data. */
- i2c_send_data(i2c, 0x3); /* OvertemperatureShutdown register */
- while (!(I2C_SR1(i2c) & I2C_SR1_BTF));
- i2c_send_data(i2c, (u8)(temp_os >> 8)); /* MSB */
- while (!(I2C_SR1(i2c) & I2C_SR1_BTF));
- i2c_send_data(i2c, (u8)(temp_os & 0xff00)); /* LSB */
- while (!(I2C_SR1(i2c) & (I2C_SR1_BTF | I2C_SR1_TxE))); /* After the last byte we have to wait for TxE too. */
-
- /* Send STOP condition. */
- i2c_send_stop(i2c);
-}
-
-void stts75_write_temp_hyst(u32 i2c, u8 sensor, u16 temp_hyst)
-{
- u32 reg32;
-
- /* Send START condition. */
- i2c_send_start(i2c);
-
- /* Waiting for START is send and therefore switched to master mode. */
- while (!((I2C_SR1(i2c) & I2C_SR1_SB)
- & (I2C_SR2(i2c) & (I2C_SR2_MSL | I2C_SR2_BUSY))));
-
- /* Say to what address we want to talk to. */
- i2c_send_7bit_address(i2c, sensor, I2C_WRITE);
-
- /* Waiting for address is transferred. */
- while (!(I2C_SR1(i2c) & I2C_SR1_ADDR));
-
- /* Cleaning ADDR condition sequence. */
- reg32 = I2C_SR2(i2c);
-
- /* Sending the data. */
- i2c_send_data(i2c, 0x2); /* TemperatureHysteresis register */
- while (!(I2C_SR1(i2c) & I2C_SR1_BTF));
- i2c_send_data(i2c, (u8)(temp_hyst >> 8)); /* MSB */
- while (!(I2C_SR1(i2c) & I2C_SR1_BTF));
- i2c_send_data(i2c, (u8)(temp_hyst & 0xff00)); /* LSB */
- while (!(I2C_SR1(i2c) & (I2C_SR1_BTF | I2C_SR1_TxE))); /* After the last byte we have to wait for TxE too. */
-
- /* Send STOP condition. */
- i2c_send_stop(i2c);
-}
-
-u16 stts75_read_temperature(u32 i2c, u8 sensor)
-{
- u32 reg32;
- u16 temperature;
-
- /* Send START condition. */
- i2c_send_start(i2c);
-
- /* Waiting for START is send and switched to master mode. */
- while (!((I2C_SR1(i2c) & I2C_SR1_SB)
- & (I2C_SR2(i2c) & (I2C_SR2_MSL | I2C_SR2_BUSY))));
-
- /* Say to what address we want to talk to. */
- /* Yes, WRITE is correct - for selecting register in STTS75. */
- i2c_send_7bit_address(i2c, sensor, I2C_WRITE);
-
- /* Waiting for address is transferred. */
- while (!(I2C_SR1(i2c) & I2C_SR1_ADDR));
-
- /* Cleaning ADDR condition sequence. */
- reg32 = I2C_SR2(i2c);
-
- i2c_send_data(i2c, 0x0); /* temperature register */
- while (!(I2C_SR1(i2c) & (I2C_SR1_BTF|I2C_SR1_TxE)));
-
- /*
- * Now we transferred that we want to ACCESS the temperature register.
- * Now we send another START condition (repeated START) and then
- * transfer the destination but with flag READ.
- */
-
- /* Send START condition. */
- i2c_send_start(i2c);
-
- /* Waiting for START is send and switched to master mode. */
- while (!((I2C_SR1(i2c) & I2C_SR1_SB)
- & (I2C_SR2(i2c) & (I2C_SR2_MSL | I2C_SR2_BUSY))));
-
- /* Say to what address we want to talk to. */
- i2c_send_7bit_address(i2c, sensor, I2C_READ);
-
- /* 2-byte receive is a special case. See datasheet POS bit. */
- I2C_CR1(i2c) |= (I2C_CR1_POS | I2C_CR1_ACK);
-
- /* Waiting for address is transferred. */
- while (!(I2C_SR1(i2c) & I2C_SR1_ADDR));
-
- /* Cleaning ADDR condition sequence. */
- reg32 = I2C_SR2(i2c);
-
- /* Cleaning I2C_SR1_ACK. */
- I2C_CR1(i2c) &= ~ I2C_CR1_ACK;
-
- /* Now the slave should begin to send us the first byte. Await BTF. */
- while (!(I2C_SR1(i2c) & I2C_SR1_BTF));
- temperature = (u16)(I2C_DR(i2c) << 8); /* MSB */
-
- /*
- * Yes they mean it: we have to generate the STOP condition before
- * saving the 1st byte.
- */
- I2C_CR1(i2c) |= I2C_CR1_STOP;
-
- temperature |= I2C_DR(i2c); /* LSB */
-
- /* Original state. */
- I2C_CR1(i2c) &= ~I2C_CR1_POS;
-
- return temperature;
-}
diff --git a/examples/other/i2c_stts75_sensor/stts75.h b/examples/other/i2c_stts75_sensor/stts75.h
deleted file mode 100644
index e07fe23..0000000
--- a/examples/other/i2c_stts75_sensor/stts75.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * This file is part of the libopenstm32 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/>.
- */
-
-#ifndef STTS75_H
-#define STTS75_H
-
-#include <stdint.h>
-
-#define STTS75_SENSOR0 0x48
-#define STTS75_SENSOR1 0x49
-#define STTS75_SENSOR2 0x4a
-#define STTS75_SENSOR3 0x4b
-#define STTS75_SENSOR4 0x4c
-#define STTS75_SENSOR5 0x4d
-#define STTS75_SENSOR6 0x4e
-#define STTS75_SENSOR7 0x4f
-
-void stts75_write_config(u32 i2c, u8 sensor);
-void stts75_write_temp_os(u32 i2c, u8 sensor, u16 temp_os);
-void stts75_write_temp_hyst(u32 i2c, u8 sensor, u16 temp_hyst);
-u16 stts75_read_temperature(u32 i2c, u8 sensor);
-
-#endif