112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
|
|
/*
|
|
* Timing values are taken from the RM except the PRESC set to 9 because
|
|
* the input clock is 72MHz.
|
|
* The timings are critical, please always refer to the STM32 Reference
|
|
* Manual before attempting changes.
|
|
*/
|
|
#if 0
|
|
static const I2CConfig i2cconfig = {
|
|
STM32_TIMINGR_PRESC(8U) | /* 72MHz/9 = 8MHz I2CCLK. */
|
|
STM32_TIMINGR_SCLDEL(3U) | STM32_TIMINGR_SDADEL(3U) |
|
|
STM32_TIMINGR_SCLH(3U) | STM32_TIMINGR_SCLL(9U),
|
|
0,
|
|
0
|
|
};
|
|
#endif
|
|
static const I2CConfig i2cconfig = {
|
|
STM32_TIMINGR_PRESC(15U) |
|
|
STM32_TIMINGR_SCLDEL(4U) | STM32_TIMINGR_SDADEL(2U) |
|
|
STM32_TIMINGR_SCLH(15U) | STM32_TIMINGR_SCLL(21U),
|
|
0,
|
|
0
|
|
};
|
|
|
|
/*
|
|
* This is a periodic thread that does absolutely nothing except flashing
|
|
* a LED.
|
|
*/
|
|
static THD_WORKING_AREA(blinker_wa, 128);
|
|
static THD_FUNCTION(blinker, arg) {
|
|
|
|
(void)arg;
|
|
|
|
chRegSetThreadName("blinker");
|
|
while (TRUE) {
|
|
palSetPad(GPIOC, GPIOC_LED1);
|
|
chThdSleepMilliseconds(500);
|
|
palClearPad(GPIOC, GPIOC_LED1);
|
|
chThdSleepMilliseconds(500);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Application entry point.
|
|
*/
|
|
int main(void) {
|
|
|
|
/*
|
|
* System initializations.
|
|
* - HAL initialization, this also initializes the configured device drivers
|
|
* and performs the board-specific initializations.
|
|
* - Kernel initialization, the main() function becomes a thread and the
|
|
* RTOS is active.
|
|
*/
|
|
halInit();
|
|
chSysInit();
|
|
|
|
/*
|
|
* Starting the I2C driver 2.
|
|
*/
|
|
i2cStart(&I2CD2, &i2cconfig);
|
|
|
|
/*
|
|
* Starting the blinker thread.
|
|
*/
|
|
chThdCreateStatic(blinker_wa, sizeof(blinker_wa),
|
|
NORMALPRIO-1, blinker, NULL);
|
|
|
|
/*
|
|
* Normal main() thread activity, in this demo it does nothing.
|
|
*/
|
|
while (TRUE) {
|
|
unsigned i;
|
|
msg_t msg;
|
|
static const uint8_t cmd[] = {0, 0};
|
|
uint8_t data[16];
|
|
|
|
msg = i2cMasterTransmitTimeout(&I2CD2, 0x52, cmd, sizeof(cmd),
|
|
data, sizeof(data), TIME_INFINITE);
|
|
if (msg != MSG_OK)
|
|
palTogglePad(GPIOC, GPIOC_LED3);
|
|
for (i = 0; i < 256; i++) {
|
|
msg = i2cMasterReceiveTimeout(&I2CD2, 0x52,
|
|
data, sizeof(data), TIME_INFINITE);
|
|
if (msg != MSG_OK)
|
|
palTogglePad(GPIOC, GPIOC_LED3);
|
|
}
|
|
chThdSleepMilliseconds(500);
|
|
palTogglePad(GPIOC, GPIOC_LED2);
|
|
}
|
|
return 0;
|
|
}
|