1 files changed, 188 insertions, 0 deletions
diff --git a/nuttx/configs/mikroe-stm32f4/src/up_extmem.c b/nuttx/configs/mikroe-stm32f4/src/up_extmem.c
new file mode 100644
index 000000000..162ffb825
--- /dev/null
+++ b/nuttx/configs/mikroe-stm32f4/src/up_extmem.c
@@ -0,0 +1,188 @@
+/************************************************************************************
+ * configs/stm32f4disovery/src/up_extmem.c
+ * arch/arm/src/board/up_extmem.c
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <assert.h>
+#include <debug.h>
+
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "up_arch.h"
+
+#include "stm32_fsmc.h"
+#include "stm32_gpio.h"
+#include "stm32.h"
+#include "mikroe-stm32f4-internal.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+#ifndef CONFIG_STM32_FSMC
+#  warning "FSMC is not enabled"
+#endif
+
+#if STM32_NGPIO_PORTS < 6
+#  error "Required GPIO ports not enabled"
+#endif
+
+#define STM32_FSMC_NADDRCONFIGS 26
+#define STM32_FSMC_NDATACONFIGS 16
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+/* GPIO configurations common to most external memories */
+
+static const uint32_t g_addressconfig[STM32_FSMC_NADDRCONFIGS] =
+{
+  GPIO_FSMC_A0,  GPIO_FSMC_A1 , GPIO_FSMC_A2,  GPIO_FSMC_A3,  GPIO_FSMC_A4 , GPIO_FSMC_A5,
+  GPIO_FSMC_A6,  GPIO_FSMC_A7,  GPIO_FSMC_A8,  GPIO_FSMC_A9,  GPIO_FSMC_A10, GPIO_FSMC_A11,
+  GPIO_FSMC_A12, GPIO_FSMC_A13, GPIO_FSMC_A14, GPIO_FSMC_A15, GPIO_FSMC_A16, GPIO_FSMC_A17,
+  GPIO_FSMC_A18, GPIO_FSMC_A19, GPIO_FSMC_A20, GPIO_FSMC_A21, GPIO_FSMC_A22, GPIO_FSMC_A23,
+  GPIO_FSMC_A24, GPIO_FSMC_A25
+};
+
+static const uint32_t g_dataconfig[STM32_FSMC_NDATACONFIGS] =
+{
+  GPIO_FSMC_D0,  GPIO_FSMC_D1 , GPIO_FSMC_D2,  GPIO_FSMC_D3,  GPIO_FSMC_D4 , GPIO_FSMC_D5,
+  GPIO_FSMC_D6,  GPIO_FSMC_D7,  GPIO_FSMC_D8,  GPIO_FSMC_D9,  GPIO_FSMC_D10, GPIO_FSMC_D11,
+  GPIO_FSMC_D12, GPIO_FSMC_D13, GPIO_FSMC_D14, GPIO_FSMC_D15
+};
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: stm32_extmemgpios
+ *
+ * Description:
+ *   Initialize GPIOs for external memory usage
+ *
+ ************************************************************************************/
+
+void stm32_extmemgpios(const uint32_t *gpios, int ngpios)
+{
+  int i;
+
+  /* Configure GPIOs */
+
+  for (i = 0; i < ngpios; i++)
+    {
+      stm32_configgpio(gpios[i]);
+    }
+}
+
+/************************************************************************************
+ * Name: stm32_extmemaddr
+ *
+ * Description:
+ *   Initialize adress line GPIOs for external memory access
+ *
+ ************************************************************************************/
+
+void stm32_extmemaddr(int naddrs)
+{
+  stm32_extmemgpios(g_addressconfig, naddrs);
+}
+
+/************************************************************************************
+ * Name: stm32_extmemdata
+ *
+ * Description:
+ *   Initialize data line GPIOs for external memory access
+ *
+ ************************************************************************************/
+
+void stm32_extmemdata(int ndata)
+{
+  stm32_extmemgpios(g_dataconfig, ndata);
+}
+
+/************************************************************************************
+ * Name: stm32_enablefsmc
+ *
+ * Description:
+ *  enable clocking to the FSMC module
+ *
+ ************************************************************************************/
+
+void stm32_enablefsmc(void)
+{
+  uint32_t regval;
+
+  /* Enable AHB clocking to the FSMC */
+
+  regval  = getreg32( STM32_RCC_AHB3ENR);
+  regval |= RCC_AHB3ENR_FSMCEN;
+  putreg32(regval, STM32_RCC_AHB3ENR);
+}
+
+/************************************************************************************
+ * Name: stm32_disablefsmc
+ *
+ * Description:
+ *  enable clocking to the FSMC module
+ *
+ ************************************************************************************/
+
+void stm32_disablefsmc(void)
+{
+  uint32_t regval;
+
+  /* Disable AHB clocking to the FSMC */
+
+  regval  = getreg32(STM32_RCC_AHB3ENR);
+  regval &= ~RCC_AHB3ENR_FSMCEN;
+  putreg32(regval, STM32_RCC_AHB3ENR);
+}