Diff: targets/TARGET_Realtek/TARGET_AMEBA/analogout_api.c

Revision:

167:e84263d55307

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/analogout_api.c	Wed Jun 21 17:46:44 2017 +0100
@@ -0,0 +1,189 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2013-2016 Realtek Semiconductor Corp.
+ *
+ * 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 "objects.h"
+#include "analogout_api.h"
+
+
+#if CONFIG_DAC_EN
+
+#include "cmsis.h"
+#include "pinmap.h"
+#include <string.h>
+
+#define DAC_POSITIVE_FULL_SCALE  0x7E0
+#define DAC_NEGATIVE_FULL_SCALE  0x820
+
+
+/** \brief analogout_init:\n
+ *          to initialize DAC
+ *  
+ *   This function is mainly to initialize a DAC channel.
+ *   \para dac_t *: obj
+ *   \para PinName: pin
+ */
+void analogout_init(dac_t *obj, PinName pin)
+{
+    uint32_t dac_idx;
+    uint32_t DacTemp;
+    PHAL_DAC_INIT_DAT   pHalDacInitData = (PHAL_DAC_INIT_DAT)&(obj->DACpara);
+    dac_idx = pin & 0x0F;
+
+    /* Assign dac index */
+    pHalDacInitData->DACIdx = dac_idx;
+
+    pHalDacInitData->DACEn         =   DAC_DISABLE;
+    pHalDacInitData->DACDataRate   =   DAC_DATA_RATE_250K;
+    pHalDacInitData->DACEndian     =   DAC_DATA_ENDIAN_LITTLE;
+    pHalDacInitData->DACBurstSz    =   10;
+    pHalDacInitData->DACDbgSel     =   DAC_DBG_SEL_DISABLE;
+    pHalDacInitData->DACDscDbgSel  =   DAC_DSC_DBG_SEL_DISABLE;
+    pHalDacInitData->DACBPDsc      =   DAC_BYPASS_DSC_SEL_DISABLE;
+    pHalDacInitData->DACDeltaSig   =   0;
+    pHalDacInitData->DACAnaCtrl0   =   0;
+    pHalDacInitData->DACAnaCtrl1   =   0;
+    pHalDacInitData->DACIntrMSK    =   DAC_FEATURE_DISABLED;
+    
+    /* DAC Function and Clock Enable*/
+    HalDACPinMuxInit(pHalDacInitData);
+
+    HalDACInit8195a(pHalDacInitData);
+    
+    HAL_DAC_WRITE32(pHalDacInitData->DACIdx, REG_DAC_INTR_CTRL, 
+                                (BIT_DAC_FIFO_FULL_EN       |
+                                 BIT_DAC_FIFO_OVERFLOW_EN   |
+                                 BIT_DAC_FIFO_STOP_EN       |
+                                 BIT_DAC__WRITE_ERROR_EN    |
+                                 BIT_DAC_DSC_OVERFLOW0_EN   |
+                                 BIT_DAC_DSC_OVERFLOW1_EN));
+    DBG_DAC_INFO("INTR MSK:%x\n", HAL_DAC_READ32(pHalDacInitData->DACIdx,REG_DAC_INTR_CTRL));
+
+    DacTemp = HAL_DAC_READ32(pHalDacInitData->DACIdx, REG_DAC_ANAPAR_DA1);
+    DacTemp |= (BIT31);
+    HAL_DAC_WRITE32(pHalDacInitData->DACIdx, REG_DAC_ANAPAR_DA1, DacTemp);
+    DBG_DAC_INFO("REG_DAC_ANAPAR_DA1:%08x\n",HAL_DAC_READ32(pHalDacInitData->DACIdx, REG_DAC_ANAPAR_DA1));
+    
+    DacTemp = HAL_DAC_READ32(pHalDacInitData->DACIdx, REG_DAC_CTRL);
+    DacTemp |= BIT3;
+    HAL_DAC_WRITE32(pHalDacInitData->DACIdx, REG_DAC_CTRL, DacTemp);
+    DBG_DAC_INFO("REG_DAC_CTRL:%08x\n",DacTemp);
+    
+    pHalDacInitData->DACEn  = DAC_ENABLE;
+    HalDACEnableRtl8195a(pHalDacInitData);
+    osDelay(6); //hardware needs some time to get ready
+}
+
+/** \brief analogout_free:\n
+ *          to free DAC
+ *  
+ *   This function is mainly to free a DAC channel.
+ *   \para dac_t *: obj
+ */
+void analogout_free(dac_t *obj)
+{
+    PHAL_DAC_INIT_DAT   pHalDacInitData = (PHAL_DAC_INIT_DAT)&(obj->DACpara);
+
+    HalDACPinMuxDeInit(pHalDacInitData);
+
+    pHalDacInitData->DACEn  = DAC_DISABLE;
+    HalDACEnableRtl8195a(pHalDacInitData);
+}
+
+/** \brief analogout_write:\n
+ *          to execute analogout_write
+ *  
+ *   This function is mainly to execute analog output and the value is a ratio.
+ *   The upper/lower bound of DAC register input value is defined by 
+ *   DAC_XXXXX_FULL_SCALE. The parameter "value" of this function should be 
+ *   transfered to register value.
+ *   
+ *   \para dac_t *  : obj
+ *   \para float      : value
+ */
+void analogout_write(dac_t *obj, float value)
+{
+    uint32_t    dactemp;
+    uint16_t    dacnegtemp;
+    PHAL_DAC_INIT_DAT   pHalDacInitData = (PHAL_DAC_INIT_DAT)&(obj->DACpara);
+    
+    if (value < 0.0f) {
+        HAL_DAC_WRITE32(pHalDacInitData->DACIdx, REG_DAC0_FIFO_WR, 0x00000000);
+    } else if (value > 1.0f) {
+        dactemp = (DAC_POSITIVE_FULL_SCALE<<16) | DAC_POSITIVE_FULL_SCALE;
+        HAL_DAC_WRITE32(pHalDacInitData->DACIdx, REG_DAC0_FIFO_WR, dactemp);
+    } else {
+        if (value >= 0.5) {
+            dactemp     = (uint32_t)((((value-0.5)/0.5) * (2^12)) * DAC_POSITIVE_FULL_SCALE);
+            dactemp     = dactemp / (2^12);
+            dactemp     = (dactemp<<16) | dactemp;
+            HAL_DAC_WRITE32(pHalDacInitData->DACIdx, REG_DAC0_FIFO_WR, dactemp);
+        } else {
+            dacnegtemp  = (DAC_NEGATIVE_FULL_SCALE & 0x7FF);
+            dacnegtemp  = ((~dacnegtemp) + 1) & 0x7FF;
+            dactemp     = (uint32_t)(((0.5-value)/0.5) * (2^12) * dacnegtemp);
+            dactemp     = dactemp / (2^12);
+            dactemp     = 0x1000 - dactemp; //change to 2's complement
+            dactemp     = (dactemp<<16) | dactemp;
+            HAL_DAC_WRITE32(pHalDacInitData->DACIdx, REG_DAC0_FIFO_WR, dactemp);
+        }
+    }
+}
+
+/** \brief analogout_write_u16:\n
+ *          to execute analogout_write_u16
+ *
+ *   The register value of DAC input is a format of 2's complement.
+ *   The most maximum value of positive value drives DAC to output a voltage about 3.3V.
+ *   The most mimimum value of negative value drives DAC to output a voltage about 0.
+ *   And the middle value of 0x000 will drive DAC to output a voltage of half of max voltage.
+ *
+ *   \para dac_t *  : obj
+ *   \para float      : value
+ */
+void analogout_write_u16(dac_t *obj, uint16_t value)
+{
+    uint32_t    dactemp;
+    PHAL_DAC_INIT_DAT   pHalDacInitData = (PHAL_DAC_INIT_DAT)&(obj->DACpara);
+    
+    /* To give a two point data */
+    dactemp = (value << 16) | value;
+    HAL_DAC_WRITE32(pHalDacInitData->DACIdx, REG_DAC0_FIFO_WR, dactemp);
+}
+
+/** \brief analogout_read_u16:\n
+ *          to read back analog output value in float format
+ *  
+ *   This function is NOT available in rtl8195a hardware design.
+ *   It always returns a fixed value of 0.0;
+ *   \para dac_t *  : obj
+ */
+float analogout_read(dac_t *obj)
+{
+    return (float)0.0;
+}
+
+/** \brief analogout_read_u16:\n
+ *          to read back analog output register value
+ *  
+ *   This function is NOT available in rtl8195a hardware design.
+ *   It always returns a fixed value of 0xFFFF;
+ *   \para dac_t *  : obj
+ */
+uint16_t analogout_read_u16(dac_t *obj)
+{
+    return (uint16_t)0xFFFF;
+}
+
+#endif