From 2d1ded91fe36fbfa8427ce854d82cc3947789b31 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Sun, 8 Aug 2010 13:51:03 +0000
Subject: Added STM32 SPI demo.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2121 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 testhal/STM32/SPI/main.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 testhal/STM32/SPI/main.c

(limited to 'testhal/STM32/SPI/main.c')

diff --git a/testhal/STM32/SPI/main.c b/testhal/STM32/SPI/main.c
new file mode 100644
index 000000000..1ebf1b45e
--- /dev/null
+++ b/testhal/STM32/SPI/main.c
@@ -0,0 +1,118 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT 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.
+
+    ChibiOS/RT 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 "ch.h"
+#include "hal.h"
+
+/*
+ * Maximum speed SPI configuration (18MHz, CPHA=0, CPOL=0, MSb first).
+ */
+static const SPIConfig hs_spicfg = {
+  GPIOA,
+  GPIOA_SPI1NSS,
+  0
+};
+
+/*
+ * Low speed SPI configuration (281.250KHz, CPHA=0, CPOL=0, MSb first).
+ */
+static const SPIConfig ls_spicfg = {
+  GPIOA,
+  GPIOA_SPI1NSS,
+  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;
+  while (TRUE) {
+    spiAcquireBus(&SPID1);              /* Acquire ownership of the bus.    */
+    palClearPad(IOPORT3, GPIOC_LED);    /* LED ON.                          */
+    spiStart(&SPID1, &hs_spicfg);       /* Setup transfer parameters.       */
+    spiSelect(&SPID1);                  /* Slave Select assertion.          */
+    spiExchange(&SPID1, 512,
+                txbuf, rxbuf);          /* Atomic transfer operations.      */
+    spiUnselect(&SPID1);                /* Slave Select de-assertion.       */
+    spiReleaseBus(&SPID1);              /* 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;
+  while (TRUE) {
+    spiAcquireBus(&SPID1);              /* Acquire ownership of the bus.    */
+    palSetPad(IOPORT3, GPIOC_LED);      /* LED OFF.                         */
+    spiStart(&SPID1, &ls_spicfg);       /* Setup transfer parameters.       */
+    spiSelect(&SPID1);                  /* Slave Select assertion.          */
+    spiExchange(&SPID1, 512,
+                txbuf, rxbuf);          /* Atomic transfer operations.      */
+    spiUnselect(&SPID1);                /* Slave Select de-assertion.       */
+    spiReleaseBus(&SPID1);              /* Ownership release.               */
+  }
+  return 0;
+}
+
+/*
+ * Entry point, note, the main() function is already a thread in the system
+ * on entry.
+ */
+int main(int argc, char **argv) {
+  unsigned i;
+
+  (void)argc;
+  (void)argv;
+
+  /*
+   * 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;
+}
-- 
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