From 7772ea4579a45bcf63ebd5e68be66ba1a9c72dfa Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Fri, 11 Nov 2016 15:02:17 -0500
Subject: chibios!

---
 ChibiOS_16.1.5/testhal/STM32/STM32F37x/I2C/main.c | 110 ++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 ChibiOS_16.1.5/testhal/STM32/STM32F37x/I2C/main.c

(limited to 'ChibiOS_16.1.5/testhal/STM32/STM32F37x/I2C/main.c')

diff --git a/ChibiOS_16.1.5/testhal/STM32/STM32F37x/I2C/main.c b/ChibiOS_16.1.5/testhal/STM32/STM32F37x/I2C/main.c
new file mode 100644
index 0000000..5eb3dcb
--- /dev/null
+++ b/ChibiOS_16.1.5/testhal/STM32/STM32F37x/I2C/main.c
@@ -0,0 +1,110 @@
+/*
+    ChibiOS - Copyright (C) 2006..2015 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);
+  }
+}
+
+/*
+ * 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;
+}
-- 
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