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mbed library sources. Supersedes mbed-src.

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targets/TARGET_Maxim/TARGET_MAX32610/analogout_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
149:156823d33999 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /*******************************************************************************
<> 144:ef7eb2e8f9f7 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Permission is hereby granted, free of charge, to any person obtaining a
<> 144:ef7eb2e8f9f7 5 * copy of this software and associated documentation files (the "Software"),
<> 144:ef7eb2e8f9f7 6 * to deal in the Software without restriction, including without limitation
<> 144:ef7eb2e8f9f7 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
<> 144:ef7eb2e8f9f7 8 * and/or sell copies of the Software, and to permit persons to whom the
<> 144:ef7eb2e8f9f7 9 * Software is furnished to do so, subject to the following conditions:
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 * The above copyright notice and this permission notice shall be included
<> 144:ef7eb2e8f9f7 12 * in all copies or substantial portions of the Software.
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
<> 144:ef7eb2e8f9f7 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
<> 144:ef7eb2e8f9f7 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
<> 144:ef7eb2e8f9f7 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
<> 144:ef7eb2e8f9f7 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
<> 144:ef7eb2e8f9f7 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
<> 144:ef7eb2e8f9f7 20 * OTHER DEALINGS IN THE SOFTWARE.
<> 144:ef7eb2e8f9f7 21 *
<> 144:ef7eb2e8f9f7 22 * Except as contained in this notice, the name of Maxim Integrated
<> 144:ef7eb2e8f9f7 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
<> 144:ef7eb2e8f9f7 24 * Products, Inc. Branding Policy.
<> 144:ef7eb2e8f9f7 25 *
<> 144:ef7eb2e8f9f7 26 * The mere transfer of this software does not imply any licenses
<> 144:ef7eb2e8f9f7 27 * of trade secrets, proprietary technology, copyrights, patents,
<> 144:ef7eb2e8f9f7 28 * trademarks, maskwork rights, or any other form of intellectual
<> 144:ef7eb2e8f9f7 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
<> 144:ef7eb2e8f9f7 30 * ownership rights.
<> 144:ef7eb2e8f9f7 31 *******************************************************************************
<> 144:ef7eb2e8f9f7 32 */
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 35 #include "analogout_api.h"
<> 144:ef7eb2e8f9f7 36 #include "clkman_regs.h"
<> 144:ef7eb2e8f9f7 37 #include "pwrman_regs.h"
<> 144:ef7eb2e8f9f7 38 #include "afe_regs.h"
<> 144:ef7eb2e8f9f7 39 #include "PeripheralPins.h"
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 //******************************************************************************
<> 144:ef7eb2e8f9f7 42 void analogout_init(dac_t *obj, PinName pin)
<> 144:ef7eb2e8f9f7 43 {
<> 144:ef7eb2e8f9f7 44 // Make sure pin is an analog pin we can use for ADC
<> 144:ef7eb2e8f9f7 45 DACName dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
<> 144:ef7eb2e8f9f7 46 MBED_ASSERT((DACName)dac != (DACName)NC);
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 // Set the object pointer
<> 144:ef7eb2e8f9f7 49 obj->dac = ((mxc_dac_regs_t*)MXC_DAC_GET_DAC((pin & 0x3)));
<> 144:ef7eb2e8f9f7 50 obj->dac_fifo = ((mxc_dac_fifo_regs_t*)MXC_DAC_GET_FIFO((pin & 0x3)));
<> 144:ef7eb2e8f9f7 51 obj->index = (pin & 0x3);
<> 144:ef7eb2e8f9f7 52
<> 144:ef7eb2e8f9f7 53 // Set the ADC clock to the system clock frequency
<> 144:ef7eb2e8f9f7 54 MXC_SET_FIELD(&MXC_CLKMAN->clk_ctrl, MXC_F_CLKMAN_CLK_CTRL_ADC_SOURCE_SELECT,
<> 144:ef7eb2e8f9f7 55 (MXC_F_CLKMAN_CLK_CTRL_ADC_GATE_N | (MXC_E_CLKMAN_ADC_SOURCE_SELECT_SYSTEM <<
<> 144:ef7eb2e8f9f7 56 MXC_F_CLKMAN_CLK_CTRL_ADC_SOURCE_SELECT_POS)));
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58
<> 144:ef7eb2e8f9f7 59 // Setup the OPAMP in follower mode
<> 144:ef7eb2e8f9f7 60 switch(obj->index) {
<> 144:ef7eb2e8f9f7 61 case 0:
<> 144:ef7eb2e8f9f7 62 // Enable DAC clock
<> 144:ef7eb2e8f9f7 63 MXC_CLKMAN->clk_ctrl_14_dac0 = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 // Enable OPAMP
<> 144:ef7eb2e8f9f7 66 MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP0;
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 // Set the positive and negative inputs
<> 144:ef7eb2e8f9f7 69 MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_A |
<> 144:ef7eb2e8f9f7 70 MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP0 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP0),
<> 144:ef7eb2e8f9f7 71 ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP0_POS) |
<> 144:ef7eb2e8f9f7 72 (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP0_POS) |
<> 144:ef7eb2e8f9f7 73 (0x0 << MXC_F_AFE_CTRL4_DAC_SEL_A_POS)));
<> 144:ef7eb2e8f9f7 74
<> 144:ef7eb2e8f9f7 75 // Enable N and P channel inputs
<> 144:ef7eb2e8f9f7 76 MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP0 |
<> 144:ef7eb2e8f9f7 77 MXC_F_AFE_CTRL3_EN_NCH_OPAMP0);
<> 144:ef7eb2e8f9f7 78 break;
<> 144:ef7eb2e8f9f7 79 case 1:
<> 144:ef7eb2e8f9f7 80 // Enable DAC clock
<> 144:ef7eb2e8f9f7 81 MXC_CLKMAN->clk_ctrl_15_dac1 = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
<> 144:ef7eb2e8f9f7 82
<> 144:ef7eb2e8f9f7 83 // Enable OPAMP
<> 144:ef7eb2e8f9f7 84 MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP1;
<> 144:ef7eb2e8f9f7 85
<> 144:ef7eb2e8f9f7 86 // Set the positive and negative inputs
<> 144:ef7eb2e8f9f7 87 MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_B |
<> 144:ef7eb2e8f9f7 88 MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP1 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP1),
<> 144:ef7eb2e8f9f7 89 ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP1_POS) |
<> 144:ef7eb2e8f9f7 90 (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP1_POS) |
<> 144:ef7eb2e8f9f7 91 (0x1 << MXC_F_AFE_CTRL4_DAC_SEL_B_POS)));
<> 144:ef7eb2e8f9f7 92
<> 144:ef7eb2e8f9f7 93 // Enable N and P channel inputs
<> 144:ef7eb2e8f9f7 94 MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP1 |
<> 144:ef7eb2e8f9f7 95 MXC_F_AFE_CTRL3_EN_NCH_OPAMP1);
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 break;
<> 144:ef7eb2e8f9f7 98 case 2:
<> 144:ef7eb2e8f9f7 99 // Enable DAC clock
<> 144:ef7eb2e8f9f7 100 MXC_CLKMAN->clk_ctrl_16_dac2 = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
<> 144:ef7eb2e8f9f7 101
<> 144:ef7eb2e8f9f7 102 // Enable OPAMP
<> 144:ef7eb2e8f9f7 103 MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP2;
<> 144:ef7eb2e8f9f7 104
<> 144:ef7eb2e8f9f7 105 // Set the positive and negative inputs
<> 144:ef7eb2e8f9f7 106 MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_C |
<> 144:ef7eb2e8f9f7 107 MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP2 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP2),
<> 144:ef7eb2e8f9f7 108 ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP2_POS) |
<> 144:ef7eb2e8f9f7 109 (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP2_POS) |
<> 144:ef7eb2e8f9f7 110 (0x2 << MXC_F_AFE_CTRL4_DAC_SEL_C_POS)));
<> 144:ef7eb2e8f9f7 111
<> 144:ef7eb2e8f9f7 112 // Enable N and P channel inputs
<> 144:ef7eb2e8f9f7 113 MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP2 |
<> 144:ef7eb2e8f9f7 114 MXC_F_AFE_CTRL3_EN_NCH_OPAMP2);
<> 144:ef7eb2e8f9f7 115 break;
<> 144:ef7eb2e8f9f7 116 case 3:
<> 144:ef7eb2e8f9f7 117 // Enable DAC clock
<> 144:ef7eb2e8f9f7 118 MXC_CLKMAN->clk_ctrl_17_dac3 = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
<> 144:ef7eb2e8f9f7 119
<> 144:ef7eb2e8f9f7 120 // Enable OPAMP
<> 144:ef7eb2e8f9f7 121 MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP3;
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123 // Set the positive and negative inputs
<> 144:ef7eb2e8f9f7 124 MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_D |
<> 144:ef7eb2e8f9f7 125 MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP3 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP3),
<> 144:ef7eb2e8f9f7 126 ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP3_POS) |
<> 144:ef7eb2e8f9f7 127 (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP3_POS) |
<> 144:ef7eb2e8f9f7 128 (0x3 << MXC_F_AFE_CTRL4_DAC_SEL_D_POS)));
<> 144:ef7eb2e8f9f7 129
<> 144:ef7eb2e8f9f7 130 // Enable N and P channel inputs
<> 144:ef7eb2e8f9f7 131 MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP3 |
<> 144:ef7eb2e8f9f7 132 MXC_F_AFE_CTRL3_EN_NCH_OPAMP3);
<> 144:ef7eb2e8f9f7 133 break;
<> 144:ef7eb2e8f9f7 134 }
<> 144:ef7eb2e8f9f7 135
<> 144:ef7eb2e8f9f7 136 // Enable AFE power
<> 144:ef7eb2e8f9f7 137 MXC_PWRMAN->pwr_rst_ctrl |= MXC_F_PWRMAN_PWR_RST_CTRL_AFE_POWERED;
<> 144:ef7eb2e8f9f7 138
<> 144:ef7eb2e8f9f7 139 // Setup internal voltage references
<> 144:ef7eb2e8f9f7 140 MXC_SET_FIELD(&MXC_AFE->ctrl1, (MXC_F_AFE_CTRL1_REF_DAC_VOLT_SEL | MXC_F_AFE_CTRL1_REF_ADC_VOLT_SEL),
<> 144:ef7eb2e8f9f7 141 (MXC_F_AFE_CTRL1_REF_ADC_POWERUP | MXC_F_AFE_CTRL1_REF_BLK_POWERUP |
<> 144:ef7eb2e8f9f7 142 (MXC_E_AFE_REF_VOLT_SEL_1500 << MXC_F_AFE_CTRL1_REF_ADC_VOLT_SEL_POS)));
<> 144:ef7eb2e8f9f7 143
<> 144:ef7eb2e8f9f7 144 // Disable interpolation
<> 144:ef7eb2e8f9f7 145 obj->dac->ctrl0 &= ~MXC_F_DAC_CTRL0_INTERP_MODE;
<> 144:ef7eb2e8f9f7 146 }
<> 144:ef7eb2e8f9f7 147
<> 144:ef7eb2e8f9f7 148 //******************************************************************************
<> 144:ef7eb2e8f9f7 149 void analogout_write(dac_t *obj, float value)
<> 144:ef7eb2e8f9f7 150 {
<> 144:ef7eb2e8f9f7 151 analogout_write_u16(obj, (uint16_t)((value/1.0) * 0xFFFF));
<> 144:ef7eb2e8f9f7 152 }
<> 144:ef7eb2e8f9f7 153
<> 144:ef7eb2e8f9f7 154 //******************************************************************************
<> 144:ef7eb2e8f9f7 155 void analogout_write_u16(dac_t *obj, uint16_t value)
<> 144:ef7eb2e8f9f7 156 {
<> 144:ef7eb2e8f9f7 157 // Enable the OPAMP
<> 144:ef7eb2e8f9f7 158 // Setup the OPAMP in follower mode
<> 144:ef7eb2e8f9f7 159 switch(obj->index) {
<> 144:ef7eb2e8f9f7 160 case 0:
<> 144:ef7eb2e8f9f7 161 MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP0;
<> 144:ef7eb2e8f9f7 162 break;
<> 144:ef7eb2e8f9f7 163 case 1:
<> 144:ef7eb2e8f9f7 164 MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP1;
<> 144:ef7eb2e8f9f7 165 break;
<> 144:ef7eb2e8f9f7 166 case 2:
<> 144:ef7eb2e8f9f7 167 MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP2;
<> 144:ef7eb2e8f9f7 168 break;
<> 144:ef7eb2e8f9f7 169 case 3:
<> 144:ef7eb2e8f9f7 170 MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP3;
<> 144:ef7eb2e8f9f7 171 break;
<> 144:ef7eb2e8f9f7 172 }
<> 144:ef7eb2e8f9f7 173
<> 144:ef7eb2e8f9f7 174 // Output 1 sample with minimal delay
<> 144:ef7eb2e8f9f7 175 obj->dac->rate |= 0x1;
<> 144:ef7eb2e8f9f7 176
<> 144:ef7eb2e8f9f7 177 // Set the start mode to output once data is in the FIFO
<> 144:ef7eb2e8f9f7 178 obj->dac->ctrl0 &= ~(MXC_F_DAC_CTRL0_START_MODE | MXC_F_DAC_CTRL0_OP_MODE);
<> 144:ef7eb2e8f9f7 179
<> 144:ef7eb2e8f9f7 180 // Enable the DAC
<> 144:ef7eb2e8f9f7 181 obj->dac->ctrl0 |= (MXC_F_DAC_CTRL0_POWER_MODE_2 |
<> 144:ef7eb2e8f9f7 182 MXC_F_DAC_CTRL0_POWER_MODE_1_0 | MXC_F_DAC_CTRL0_POWER_ON |
<> 144:ef7eb2e8f9f7 183 MXC_F_DAC_CTRL0_CLOCK_GATE_EN | MXC_F_DAC_CTRL0_CPU_START);
<> 144:ef7eb2e8f9f7 184
<> 144:ef7eb2e8f9f7 185 if(obj->index < 2) {
<> 144:ef7eb2e8f9f7 186 obj->out = (value);
<> 144:ef7eb2e8f9f7 187 obj->dac_fifo->output_16 = (obj->out);
<> 144:ef7eb2e8f9f7 188
<> 144:ef7eb2e8f9f7 189 } else {
<> 144:ef7eb2e8f9f7 190 // Convert 16 bits to 8 bits
<> 144:ef7eb2e8f9f7 191 obj->out = (value >> 8);
<> 144:ef7eb2e8f9f7 192 obj->dac_fifo->output_8 = (obj->out);
<> 144:ef7eb2e8f9f7 193 }
<> 144:ef7eb2e8f9f7 194 }
<> 144:ef7eb2e8f9f7 195
<> 144:ef7eb2e8f9f7 196 //******************************************************************************
<> 144:ef7eb2e8f9f7 197 float analogout_read(dac_t *obj)
<> 144:ef7eb2e8f9f7 198 {
<> 144:ef7eb2e8f9f7 199 return (((float)analogout_read_u16(obj) / (float)0xFFFF) * 1.5);
<> 144:ef7eb2e8f9f7 200 }
<> 144:ef7eb2e8f9f7 201
<> 144:ef7eb2e8f9f7 202 //******************************************************************************
<> 144:ef7eb2e8f9f7 203 uint16_t analogout_read_u16(dac_t *obj)
<> 144:ef7eb2e8f9f7 204 {
<> 144:ef7eb2e8f9f7 205 if(obj->index < 2) {
<> 144:ef7eb2e8f9f7 206 // Convert 12 bits to 16 bits
<> 144:ef7eb2e8f9f7 207 return (obj->out << 4);
<> 144:ef7eb2e8f9f7 208 } else {
<> 144:ef7eb2e8f9f7 209 // Convert 8 bits to 16 bits
<> 144:ef7eb2e8f9f7 210 return (obj->out << 8);
<> 144:ef7eb2e8f9f7 211 }
<> 144:ef7eb2e8f9f7 212 }