ChibiOS 2.6.8, until I can figure out where to get it from git.

firmware/chibios/testhal/STM32F4xx/SPI/main.c

@@ -0,0 +1,138 @@
+/*
+    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"
+
+/*
+ * Maximum speed SPI configuration (21MHz, CPHA=0, CPOL=0, MSb first).
+ */
+static const SPIConfig hs_spicfg = {
+  NULL,
+  GPIOB,
+  12,
+  0
+};
+
+/*
+ * Low speed SPI configuration (328.125kHz, CPHA=0, CPOL=0, MSb first).
+ */
+static const SPIConfig ls_spicfg = {
+  NULL,
+  GPIOB,
+  12,
+  SPI_CR1_BR_2 | SPI_CR1_BR_1
+};
+
+/*
+ * SPI TX and RX buffers.
+ */
+static uint8_t txbuf[512];
+static uint8_t rxbuf[512];
+
+/*
+ * SPI bus contender 1.
+ */
+static WORKING_AREA(spi_thread_1_wa, 256);
+static msg_t spi_thread_1(void *p) {
+
+  (void)p;
+  chRegSetThreadName("SPI thread 1");
+  while (TRUE) {
+    spiAcquireBus(&SPID2);              /* Acquire ownership of the bus.    */
+    palSetPad(GPIOD, GPIOD_LED5);       /* LED ON.                          */
+    spiStart(&SPID2, &hs_spicfg);       /* Setup transfer parameters.       */
+    spiSelect(&SPID2);                  /* Slave Select assertion.          */
+    spiExchange(&SPID2, 512,
+                txbuf, rxbuf);          /* Atomic transfer operations.      */
+    spiUnselect(&SPID2);                /* Slave Select de-assertion.       */
+    spiReleaseBus(&SPID2);              /* Ownership release.               */
+  }
+  return 0;
+}
+
+/*
+ * SPI bus contender 2.
+ */
+static WORKING_AREA(spi_thread_2_wa, 256);
+static msg_t spi_thread_2(void *p) {
+
+  (void)p;
+  chRegSetThreadName("SPI thread 2");
+  while (TRUE) {
+    spiAcquireBus(&SPID2);              /* Acquire ownership of the bus.    */
+    palClearPad(GPIOD, GPIOD_LED5);     /* LED OFF.                         */
+    spiStart(&SPID2, &ls_spicfg);       /* Setup transfer parameters.       */
+    spiSelect(&SPID2);                  /* Slave Select assertion.          */
+    spiExchange(&SPID2, 512,
+                txbuf, rxbuf);          /* Atomic transfer operations.      */
+    spiUnselect(&SPID2);                /* Slave Select de-assertion.       */
+    spiReleaseBus(&SPID2);              /* Ownership release.               */
+  }
+  return 0;
+}
+
+/*
+ * Application entry point.
+ */
+int main(void) {
+  unsigned i;
+
+  /*
+   * 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();
+
+  /*
+   * SPI2 I/O pins setup.
+   */
+  palSetPadMode(GPIOB, 13, PAL_MODE_ALTERNATE(5) |
+                           PAL_STM32_OSPEED_HIGHEST);       /* New SCK.     */
+  palSetPadMode(GPIOB, 14, PAL_MODE_ALTERNATE(5) |
+                           PAL_STM32_OSPEED_HIGHEST);       /* New MISO.    */
+  palSetPadMode(GPIOB, 15, PAL_MODE_ALTERNATE(5) |
+                           PAL_STM32_OSPEED_HIGHEST);       /* New MOSI.    */
+  palSetPadMode(GPIOB, 12, PAL_MODE_OUTPUT_PUSHPULL |
+                           PAL_STM32_OSPEED_HIGHEST);       /* New CS.      */
+  palSetPad(GPIOB, 12);
+
+  /*
+   * Prepare transmit pattern.
+   */
+  for (i = 0; i < sizeof(txbuf); i++)
+    txbuf[i] = (uint8_t)i;
+
+  /*
+   * Starting the transmitter and receiver threads.
+   */
+  chThdCreateStatic(spi_thread_1_wa, sizeof(spi_thread_1_wa),
+                    NORMALPRIO + 1, spi_thread_1, NULL);
+  chThdCreateStatic(spi_thread_2_wa, sizeof(spi_thread_2_wa),
+                    NORMALPRIO + 1, spi_thread_2, NULL);
+
+  /*
+   * Normal main() thread activity, in this demo it does nothing.
+   */
+  while (TRUE) {
+    chThdSleepMilliseconds(500);
+  }
+  return 0;
+}