Amit Gandhi
test
Fork of
mbed-dev
by 
mbed official
Diff: targets/TARGET_Realtek/TARGET_AMEBA/analogout_api.c
- Revision:
- 168: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