git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1259 35acf78f-673a-0410-8e92-d51de3d6d3f4

demos/ARMCM3-STM32F103-GCC/Makefile

@@ -72,6 +72,7 @@ CSRC = ${PORTSRC} \
        ${CHIBIOS}/os/io/platforms/STM32/pal_lld.c \
        ${CHIBIOS}/os/io/platforms/STM32/serial_lld.c \
        ${CHIBIOS}/os/io/platforms/STM32/spi_lld.c \
+       ${CHIBIOS}/os/io/platforms/STM32/stm32_dma.c \
        ${CHIBIOS}/os/various/evtimer.c \
        board.c main.c
 

demos/ARMCM3-STM32F103-GCC/board.c

@@ -19,10 +19,12 @@
 
 #include <ch.h>
 #include <pal.h>
+#include <serial.h>
+#include <spi.h>
+#include <stm32_dma.h>
 #include <nvic.h>
 
 #include "board.h"
-#include "serial.h"
 
 #define AIRCR_VECTKEY           0x05FA0000
 
@@ -112,7 +114,9 @@ void hwinit1(void) {
   /*
    * Other subsystems initialization.
    */
+  dmaInit();
   sdInit();
+  spiInit();
 
   /*
    * ChibiOS/RT initialization.

os/io/platforms/STM32/spi_lld.c

@@ -26,9 +26,8 @@
 
 #include <ch.h>
 #include <spi.h>
-
-#include "nvic.h"
-#include "board.h"
+#include <stm32_dma.h>
+#include <nvic.h>
 
 #if USE_STM32_SPI1 || defined(__DOXYGEN__)
 /** @brief SPI1 driver identifier.*/
@@ -200,15 +199,17 @@ void spi_lld_init(void) {
  */
 void spi_lld_start(SPIDriver *spip) {
 
-  /* If in stopped state then enables the SPI clock.*/
+  /* If in stopped state then enables the SPI and DMA clocks.*/
   if (spip->spd_state == SPI_STOP) {
 #if USE_STM32_SPI1
     if (&SPID1 == spip) {
+      dmaEnable(DMA1_ID);
       RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;
     }
 #endif
 #if USE_STM32_SPI2
     if (&SPID2 == spip) {
+      dmaEnable(DMA1_ID);
       RCC->APB1ENR |= RCC_APB1ENR_SPI2EN;
     }
 #endif
@@ -248,11 +249,13 @@ void spi_lld_stop(SPIDriver *spip) {
   if (spip->spd_state == SPI_READY) {
 #if USE_STM32_SPI1
     if (&SPID1 == spip) {
+      dmaDisable(DMA1_ID);
       RCC->APB2ENR &= ~RCC_APB2ENR_SPI1EN;
     }
 #endif
 #if USE_STM32_SPI2
     if (&SPID2 == spip) {
+      dmaDisable(DMA1_ID);
       RCC->APB1ENR &= ~RCC_APB1ENR_SPI2EN;
     }
 #endif

os/io/platforms/STM32/stm32_dma.c

@@ -0,0 +1,89 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 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/>.
+*/
+
+/**
+ * @file stm32_dma.c
+ * @brief STM32 DMA helper driver code
+ * @addtogroup STM32_DMA
+ * @{
+ */
+
+#include <ch.h>
+
+#include "stm32_dma.h"
+
+static cnt_t dmacnt1;
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL)
+static cnt_t dmacnt2;
+#endif
+
+/**
+ * @brief STM32 DMA helper initialization.
+ */
+void dmaInit(void) {
+
+  dmacnt1 = 0;
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL)
+  dmacnt2 = 0;
+#endif
+}
+
+/**
+ * @brief Enables the specified DMA controller clock.
+ *
+ * @param[in] dma the DMA controller id
+ */
+void dmaEnable(uint32_t dma) {
+
+  switch (dma) {
+  case DMA1_ID:
+    if (dmacnt1++ == 0)
+      RCC->AHBENR |= RCC_AHBENR_DMA1EN;
+    break;
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL)
+  case DMA2_ID:
+    if (dmacnt2++ == 0)
+      RCC->AHBENR |= RCC_AHBENR_DMA2EN;
+    break;
+#endif
+  }
+}
+
+/**
+ * @brief Disables the specified DMA controller clock.
+ *
+ * @param[in] dma the DMA controller id
+ */
+void dmaDisable(uint32_t dma) {
+
+  switch (dma) {
+  case DMA1_ID:
+    if (--dmacnt1 == 0)
+      RCC->AHBENR &= ~RCC_AHBENR_DMA1EN;
+    break;
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL)
+  case DMA2_ID:
+    if (--dmacnt2 == 0)
+      RCC->AHBENR &= ~RCC_AHBENR_DMA2EN;
+    break;
+#endif
+  }
+}
+
+/** @} */

os/io/platforms/STM32/stm32_dma.h

@@ -0,0 +1,56 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 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/>.
+*/
+
+/**
+ * @file stm32_dma.h
+ * @brief STM32 DMA helper driver header
+ * @addtogroup STM32_DMA
+ * @{
+ */
+
+#ifndef _STM32_DMA_H_
+#define _STM32_DMA_H_
+
+#undef FALSE
+#undef TRUE
+#include <stm32f10x.h>
+#define FALSE 0
+#define TRUE (!FALSE)
+
+/** @brief DMA1 identifier.*/
+#define DMA1_ID 0
+
+/** @brief DMA2 identifier.*/
+#if defined(STM32F10X_HD) || defined (STM32F10X_CL) || defined(__DOXYGEN__)
+#define DMA2_ID 1
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void dmaInit(void);
+  void dmaEnable(uint32_t dma);
+  void dmaDisable(uint32_t dma);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _STM32_DMA_H_ */
+
+/** @} */