Add first implementation of adc module for stm32 cpu.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3956 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cpu/cortex-m3/drv/adc_cm3.c b/bertos/cpu/cortex-m3/drv/adc_cm3.c
new file mode 100644 (file)
index 0000000..61dd004
--- /dev/null
+++ b/bertos/cpu/cortex-m3/drv/adc_cm3.c
@@ -0,0 +1,54 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Low-level ADC module for Cortex-m3 (inplementation).
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ *
+ * This module is automatically included so no need to include
+ * in test list.
+ * notest: arm
+ *
+ */
+
+#ifndef WIZ_AUTOGEN
+       #warning This file is deprecated, you should use adc_at91.c
+
+       #include <cpu/detect.h>
+
+       #if CPU_CM3_STM32
+               #include "adc_stm32.c"
+       /*#elif  Add other ARM families here */
+       #else
+               #error Unknown CPU
+       #endif
+#endif  /* WIZ_AUTOGEN */

diff --git a/bertos/cpu/cortex-m3/drv/adc_cm3.h b/bertos/cpu/cortex-m3/drv/adc_cm3.h
new file mode 100644 (file)
index 0000000..a5f15a1
--- /dev/null
+++ b/bertos/cpu/cortex-m3/drv/adc_cm3.h
@@ -0,0 +1,46 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Low-level ADC module for ARM (interface).
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ *
+ */
+
+#include <cpu/detect.h>
+
+#if CPU_CM3_STM32
+       #include "adc_stm32.h"
+/*#elif  Add other ARM families here */
+#else
+       #error Unknown CPU
+#endif

diff --git a/bertos/cpu/cortex-m3/drv/adc_stm32.c b/bertos/cpu/cortex-m3/drv/adc_stm32.c
new file mode 100644 (file)
index 0000000..ef18386
--- /dev/null
+++ b/bertos/cpu/cortex-m3/drv/adc_stm32.c
@@ -0,0 +1,141 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2008 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief ADC hardware-specific implementation
+ *
+ * This ADC module should be use both whit kernel or none.
+ * If you are using a kernel, the adc drive does not wait the finish of
+ * conversion but use a singal every time a required conversion are
+ * ended. This signal wake up a process that return a result of
+ * conversion. Otherwise, if you not use a kernl, this module wait
+ * whit a loop the finishing of conversion.
+ *
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ */
+
+
+#include "adc_stm32.h"
+
+#include <cpu/irq.h>
+
+#include "cfg/cfg_adc.h"
+#include "cfg/cfg_proc.h"
+#include "cfg/cfg_signal.h"
+
+#include <cfg/macros.h>
+#include <cfg/compiler.h>
+#include <cfg/debug.h>
+
+// Define log settings for cfg/log.h.
+#define LOG_LEVEL         ADC_LOG_LEVEL
+#define LOG_FORMAT        ADC_LOG_FORMAT
+#include <cfg/log.h>
+
+#include <drv/adc.h>
+#include <drv/clock_stm32.h>
+#include <drv/gpio_stm32.h>
+#include <drv/irq_cm3.h>
+
+#include <io/stm32.h>
+
+
+struct stm32_adc *adc = (struct stm32_adc *)ADC1_BASE;
+
+/**
+ * Select mux channel \a ch.
+ */
+void adc_hw_select_ch(uint8_t ch)
+{
+       kprintf("Select[%d]\n", ch);
+       adc->SQR1 |= (0x1 << SQR1_SQ_LEN_SHIFT);
+       adc->SQR3 = (ch & SQR3_SQ_MASK);
+}
+
+static DECLARE_ISR(adc_redyRead)
+{
+       kputs("end\n");
+}
+/**
+ * Start an ADC convertion.
+ * If a kernel is present, preempt until convertion is complete, otherwise
+ * a busy wait on ADC_DRDY bit is done.
+ */
+uint16_t adc_hw_read(void)
+{
+       // Start convertion
+    adc->CR2 |= CR2_EXTTRIG_SWSTRT_SET;
+
+       while (!(adc->SR & BV(SR_EOC)));
+
+       //Return the last converted data
+       return (adc->DR);
+}
+
+/**
+ * Init ADC hardware.
+ */
+void adc_hw_init(void)
+{
+       /* Enable clocking on AFIO */
+       RCC->APB2ENR |= RCC_APB2_AFIO;
+       RCC->APB2ENR |= RCC_APB2_GPIOC;
+       RCC->APB2ENR |= RCC_APB2_ADC1;
+
+       /* Reset cr1 registry */
+       adc->CR1 = 0;
+       adc->CR2 = 0;
+
+       /*
+        * Configure ADC
+        *  - Regular mode
+        *  - scan mode
+        */
+       adc->CR2 |= (BV(CR2_ADON) | ADC_EXTERNALTRIGCONV_NONE | BV(CR2_TSVREFE));
+       /*
+        * Configure ADC settings
+        *  - align rigth
+        *  - enable adc
+        */
+       adc->SQR1 = 0;
+       adc->SQR2 = 0;
+       adc->SQR3 = 0;
+
+       /* Set 17.1usec sampling time on channel 16 and 17 */
+       adc->SMPR1 |= ((ADC_SAMPLETIME_239CYCLES5 << ADC_CHANNEL_16) |
+               (ADC_SAMPLETIME_239CYCLES5 << ADC_CHANNEL_17));
+
+       /* Register the IRQ handler */
+       sysirq_setHandler(ADC_IRQHANDLER, adc_redyRead);
+       //adc->CR1 |= BV(CR1_EOCIE);
+
+}

diff --git a/bertos/cpu/cortex-m3/drv/adc_stm32.h b/bertos/cpu/cortex-m3/drv/adc_stm32.h
new file mode 100644 (file)
index 0000000..f0af892
--- /dev/null
+++ b/bertos/cpu/cortex-m3/drv/adc_stm32.h
@@ -0,0 +1,72 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2008 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief ADC hardware-specific definition
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ */
+
+#ifndef DRV_ADC_STM32_H
+#define DRV_ADC_STM32_H
+
+#include <hw/hw_cpufreq.h>
+
+#include "cfg/cfg_adc.h"
+
+#include <cfg/compiler.h>
+
+/**
+ * ADC config define.
+ */
+#define ADC_MUX_MAXCH         17 //Max number of channel for ADC.
+#define ADC_BITS              12 //Bit resolution for ADC converter.
+
+/**
+ * Define PIO controller for enable ADC function.
+ * \{
+ */
+
+/*\}*/
+
+/**
+ * Init the ADC pins.
+ * Implement it if necessary.
+ */
+#define ADC_INIT_PINS() \
+       do { \
+       } while (0)
+
+void adc_hw_select_ch(uint8_t ch);
+uint16_t adc_hw_read(void);
+void adc_hw_init(void);
+
+#endif /* DRV_ADC_STM32_H */