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Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Maxim/TARGET_MAX32610/analogout_api.c@583:967d0d8b7aed, 2015-07-06 (annotated)

Committer:
mbed_official
Date:
Mon Jul 06 09:15:09 2015 +0100
Revision:
583:967d0d8b7aed
Parent:
515:7467ef1f4ad8 
Synchronized with git revision 0a7df4e114501712e80882fb66c8a1e1ffca2dcb



Full URL: https://github.com/mbedmicro/mbed/commit/0a7df4e114501712e80882fb66c8a1e1ffca2dcb/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 507:d4fc7603a669 1 /*******************************************************************************
mbed_official 507:d4fc7603a669 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
mbed_official 507:d4fc7603a669 3 *
mbed_official 507:d4fc7603a669 4 * Permission is hereby granted, free of charge, to any person obtaining a
mbed_official 507:d4fc7603a669 5 * copy of this software and associated documentation files (the "Software"),
mbed_official 507:d4fc7603a669 6 * to deal in the Software without restriction, including without limitation
mbed_official 507:d4fc7603a669 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
mbed_official 507:d4fc7603a669 8 * and/or sell copies of the Software, and to permit persons to whom the
mbed_official 507:d4fc7603a669 9 * Software is furnished to do so, subject to the following conditions:
mbed_official 507:d4fc7603a669 10 *
mbed_official 507:d4fc7603a669 11 * The above copyright notice and this permission notice shall be included
mbed_official 507:d4fc7603a669 12 * in all copies or substantial portions of the Software.
mbed_official 507:d4fc7603a669 13 *
mbed_official 507:d4fc7603a669 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
mbed_official 507:d4fc7603a669 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
mbed_official 507:d4fc7603a669 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
mbed_official 507:d4fc7603a669 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
mbed_official 507:d4fc7603a669 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
mbed_official 507:d4fc7603a669 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
mbed_official 507:d4fc7603a669 20 * OTHER DEALINGS IN THE SOFTWARE.
mbed_official 507:d4fc7603a669 21 *
mbed_official 507:d4fc7603a669 22 * Except as contained in this notice, the name of Maxim Integrated
mbed_official 507:d4fc7603a669 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
mbed_official 507:d4fc7603a669 24 * Products, Inc. Branding Policy.
mbed_official 507:d4fc7603a669 25 *
mbed_official 507:d4fc7603a669 26 * The mere transfer of this software does not imply any licenses
mbed_official 507:d4fc7603a669 27 * of trade secrets, proprietary technology, copyrights, patents,
mbed_official 507:d4fc7603a669 28 * trademarks, maskwork rights, or any other form of intellectual
mbed_official 507:d4fc7603a669 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
mbed_official 507:d4fc7603a669 30 * ownership rights.
mbed_official 507:d4fc7603a669 31 *******************************************************************************
mbed_official 507:d4fc7603a669 32 */
mbed_official 507:d4fc7603a669 33
mbed_official 507:d4fc7603a669 34 #include "mbed_assert.h"
mbed_official 507:d4fc7603a669 35 #include "analogout_api.h"
mbed_official 507:d4fc7603a669 36 #include "clkman_regs.h"
mbed_official 507:d4fc7603a669 37 #include "pwrman_regs.h"
mbed_official 507:d4fc7603a669 38 #include "afe_regs.h"
mbed_official 507:d4fc7603a669 39 #include "PeripheralPins.h"
mbed_official 507:d4fc7603a669 40
mbed_official 507:d4fc7603a669 41 //******************************************************************************
mbed_official 507:d4fc7603a669 42 void analogout_init(dac_t *obj, PinName pin)
mbed_official 507:d4fc7603a669 43 {
mbed_official 507:d4fc7603a669 44 // Make sure pin is an analog pin we can use for ADC
mbed_official 507:d4fc7603a669 45 DACName dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 507:d4fc7603a669 46 MBED_ASSERT((DACName)dac != (DACName)NC);
mbed_official 507:d4fc7603a669 47
mbed_official 507:d4fc7603a669 48 // Set the object pointer
mbed_official 507:d4fc7603a669 49 obj->dac = ((mxc_dac_regs_t*)MXC_DAC_GET_DAC((pin & 0x3)));
mbed_official 507:d4fc7603a669 50 obj->dac_fifo = ((mxc_dac_fifo_t*)MXC_DAC_GET_FIFO((pin & 0x3)));
mbed_official 507:d4fc7603a669 51 obj->index = (pin & 0x3);
mbed_official 507:d4fc7603a669 52
mbed_official 507:d4fc7603a669 53 // Set the ADC clock to the system clock frequency
mbed_official 507:d4fc7603a669 54 MXC_SET_FIELD(&MXC_CLKMAN->clk_ctrl, MXC_F_CLKMAN_CLK_CTRL_ADC_SOURCE_SELECT,
mbed_official 507:d4fc7603a669 55 (MXC_F_CLKMAN_CLK_CTRL_ADC_GATE_N | (MXC_E_CLKMAN_ADC_SOURCE_SELECT_SYSTEM <<
mbed_official 507:d4fc7603a669 56 MXC_F_CLKMAN_CLK_CTRL_ADC_SOURCE_SELECT_POS)));
mbed_official 507:d4fc7603a669 57
mbed_official 507:d4fc7603a669 58
mbed_official 507:d4fc7603a669 59 // Setup the OPAMP in follower mode
mbed_official 507:d4fc7603a669 60 switch(obj->index) {
mbed_official 507:d4fc7603a669 61 case 0:
mbed_official 507:d4fc7603a669 62 // Enable DAC clock
mbed_official 507:d4fc7603a669 63 MXC_CLKMAN->clk_ctrl_14_dac0 = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
mbed_official 507:d4fc7603a669 64
mbed_official 507:d4fc7603a669 65 // Enable OPAMP
mbed_official 507:d4fc7603a669 66 MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP0;
mbed_official 507:d4fc7603a669 67
mbed_official 507:d4fc7603a669 68 // Set the positive and negative inputs
mbed_official 507:d4fc7603a669 69 MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_A |
mbed_official 507:d4fc7603a669 70 MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP0 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP0),
mbed_official 507:d4fc7603a669 71 ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP0_POS) |
mbed_official 507:d4fc7603a669 72 (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP0_POS) |
mbed_official 507:d4fc7603a669 73 (0x0 << MXC_F_AFE_CTRL4_DAC_SEL_A_POS)));
mbed_official 507:d4fc7603a669 74
mbed_official 507:d4fc7603a669 75 // Enable N and P channel inputs
mbed_official 507:d4fc7603a669 76 MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP0 |
mbed_official 507:d4fc7603a669 77 MXC_F_AFE_CTRL3_EN_NCH_OPAMP0);
mbed_official 507:d4fc7603a669 78 break;
mbed_official 507:d4fc7603a669 79 case 1:
mbed_official 507:d4fc7603a669 80 // Enable DAC clock
mbed_official 507:d4fc7603a669 81 MXC_CLKMAN->clk_ctrl_15_dac1 = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
mbed_official 507:d4fc7603a669 82
mbed_official 507:d4fc7603a669 83 // Enable OPAMP
mbed_official 507:d4fc7603a669 84 MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP1;
mbed_official 507:d4fc7603a669 85
mbed_official 507:d4fc7603a669 86 // Set the positive and negative inputs
mbed_official 507:d4fc7603a669 87 MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_B |
mbed_official 507:d4fc7603a669 88 MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP1 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP1),
mbed_official 507:d4fc7603a669 89 ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP1_POS) |
mbed_official 507:d4fc7603a669 90 (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP1_POS) |
mbed_official 507:d4fc7603a669 91 (0x1 << MXC_F_AFE_CTRL4_DAC_SEL_B_POS)));
mbed_official 507:d4fc7603a669 92
mbed_official 507:d4fc7603a669 93 // Enable N and P channel inputs
mbed_official 507:d4fc7603a669 94 MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP1 |
mbed_official 507:d4fc7603a669 95 MXC_F_AFE_CTRL3_EN_NCH_OPAMP1);
mbed_official 507:d4fc7603a669 96
mbed_official 507:d4fc7603a669 97 break;
mbed_official 507:d4fc7603a669 98 case 2:
mbed_official 507:d4fc7603a669 99 // Enable DAC clock
mbed_official 507:d4fc7603a669 100 MXC_CLKMAN->clk_ctrl_16_dac2 = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
mbed_official 507:d4fc7603a669 101
mbed_official 507:d4fc7603a669 102 // Enable OPAMP
mbed_official 507:d4fc7603a669 103 MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP2;
mbed_official 507:d4fc7603a669 104
mbed_official 507:d4fc7603a669 105 // Set the positive and negative inputs
mbed_official 507:d4fc7603a669 106 MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_C |
mbed_official 507:d4fc7603a669 107 MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP2 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP2),
mbed_official 507:d4fc7603a669 108 ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP2_POS) |
mbed_official 507:d4fc7603a669 109 (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP2_POS) |
mbed_official 507:d4fc7603a669 110 (0x2 << MXC_F_AFE_CTRL4_DAC_SEL_C_POS)));
mbed_official 507:d4fc7603a669 111
mbed_official 507:d4fc7603a669 112 // Enable N and P channel inputs
mbed_official 507:d4fc7603a669 113 MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP2 |
mbed_official 507:d4fc7603a669 114 MXC_F_AFE_CTRL3_EN_NCH_OPAMP2);
mbed_official 507:d4fc7603a669 115 break;
mbed_official 507:d4fc7603a669 116 case 3:
mbed_official 507:d4fc7603a669 117 // Enable DAC clock
mbed_official 507:d4fc7603a669 118 MXC_CLKMAN->clk_ctrl_17_dac3 = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
mbed_official 507:d4fc7603a669 119
mbed_official 507:d4fc7603a669 120 // Enable OPAMP
mbed_official 507:d4fc7603a669 121 MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP3;
mbed_official 507:d4fc7603a669 122
mbed_official 507:d4fc7603a669 123 // Set the positive and negative inputs
mbed_official 507:d4fc7603a669 124 MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_D |
mbed_official 507:d4fc7603a669 125 MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP3 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP3),
mbed_official 507:d4fc7603a669 126 ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP3_POS) |
mbed_official 507:d4fc7603a669 127 (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP3_POS) |
mbed_official 507:d4fc7603a669 128 (0x3 << MXC_F_AFE_CTRL4_DAC_SEL_D_POS)));
mbed_official 507:d4fc7603a669 129
mbed_official 507:d4fc7603a669 130 // Enable N and P channel inputs
mbed_official 507:d4fc7603a669 131 MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP3 |
mbed_official 507:d4fc7603a669 132 MXC_F_AFE_CTRL3_EN_NCH_OPAMP3);
mbed_official 507:d4fc7603a669 133 break;
mbed_official 507:d4fc7603a669 134 }
mbed_official 507:d4fc7603a669 135
mbed_official 507:d4fc7603a669 136 // Enable AFE power
mbed_official 507:d4fc7603a669 137 MXC_PWRMAN->pwr_rst_ctrl |= MXC_F_PWRMAN_PWR_RST_CTRL_AFE_POWERED;
mbed_official 507:d4fc7603a669 138
mbed_official 507:d4fc7603a669 139 // Setup internal voltage references
mbed_official 507:d4fc7603a669 140 MXC_SET_FIELD(&MXC_AFE->ctrl1, (MXC_F_AFE_CTRL1_REF_DAC_VOLT_SEL | MXC_F_AFE_CTRL1_REF_ADC_VOLT_SEL),
mbed_official 507:d4fc7603a669 141 (MXC_F_AFE_CTRL1_REF_ADC_POWERUP | MXC_F_AFE_CTRL1_REF_BLK_POWERUP |
mbed_official 507:d4fc7603a669 142 (MXC_E_AFE_REF_VOLT_SEL_1500 << MXC_F_AFE_CTRL1_REF_ADC_VOLT_SEL_POS)));
mbed_official 507:d4fc7603a669 143
mbed_official 507:d4fc7603a669 144 // Disable interpolation
mbed_official 507:d4fc7603a669 145 obj->dac->ctrl0 &= MXC_F_DAC_CTRL0_INTERP_MODE;
mbed_official 507:d4fc7603a669 146 }
mbed_official 507:d4fc7603a669 147
mbed_official 507:d4fc7603a669 148 //******************************************************************************
mbed_official 507:d4fc7603a669 149 void analogout_write(dac_t *obj, float value)
mbed_official 507:d4fc7603a669 150 {
mbed_official 507:d4fc7603a669 151 analogout_write_u16(obj, (uint16_t)((value/1.0) * 0xFFFF));
mbed_official 507:d4fc7603a669 152 }
mbed_official 507:d4fc7603a669 153
mbed_official 507:d4fc7603a669 154 //******************************************************************************
mbed_official 507:d4fc7603a669 155 void analogout_write_u16(dac_t *obj, uint16_t value)
mbed_official 507:d4fc7603a669 156 {
mbed_official 507:d4fc7603a669 157 // Enable the OPAMP
mbed_official 507:d4fc7603a669 158 // Setup the OPAMP in follower mode
mbed_official 507:d4fc7603a669 159 switch(obj->index) {
mbed_official 507:d4fc7603a669 160 case 0:
mbed_official 507:d4fc7603a669 161 MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP0;
mbed_official 507:d4fc7603a669 162 break;
mbed_official 507:d4fc7603a669 163 case 1:
mbed_official 507:d4fc7603a669 164 MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP1;
mbed_official 507:d4fc7603a669 165 break;
mbed_official 507:d4fc7603a669 166 case 2:
mbed_official 507:d4fc7603a669 167 MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP2;
mbed_official 507:d4fc7603a669 168 break;
mbed_official 507:d4fc7603a669 169 case 3:
mbed_official 507:d4fc7603a669 170 MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP3;
mbed_official 507:d4fc7603a669 171 break;
mbed_official 507:d4fc7603a669 172 }
mbed_official 507:d4fc7603a669 173
mbed_official 507:d4fc7603a669 174 // Output 1 sample with minimal delay
mbed_official 507:d4fc7603a669 175 obj->dac->rate |= 0x1;
mbed_official 507:d4fc7603a669 176
mbed_official 507:d4fc7603a669 177 // Set the start mode to output once data is in the FIFO
mbed_official 507:d4fc7603a669 178 obj->dac->ctrl0 &= ~(MXC_F_DAC_CTRL0_START_MODE | MXC_F_DAC_CTRL0_OP_MODE);
mbed_official 507:d4fc7603a669 179
mbed_official 507:d4fc7603a669 180 // Enable the DAC
mbed_official 507:d4fc7603a669 181 obj->dac->ctrl0 |= (MXC_F_DAC_CTRL0_POWER_MODE_2 |
mbed_official 507:d4fc7603a669 182 MXC_F_DAC_CTRL0_POWER_MODE_1_0 | MXC_F_DAC_CTRL0_POWER_ON |
mbed_official 507:d4fc7603a669 183 MXC_F_DAC_CTRL0_CLOCK_GATE_EN | MXC_F_DAC_CTRL0_CPU_START);
mbed_official 507:d4fc7603a669 184
mbed_official 507:d4fc7603a669 185 if(obj->index < 2) {
mbed_official 515:7467ef1f4ad8 186 obj->out = (value);
mbed_official 507:d4fc7603a669 187 obj->dac_fifo->output_16 = (obj->out);
mbed_official 507:d4fc7603a669 188
mbed_official 507:d4fc7603a669 189 } else {
mbed_official 507:d4fc7603a669 190 // Convert 16 bits to 8 bits
mbed_official 507:d4fc7603a669 191 obj->out = (value >> 8);
mbed_official 507:d4fc7603a669 192 obj->dac_fifo->output_8 = (obj->out);
mbed_official 507:d4fc7603a669 193 }
mbed_official 507:d4fc7603a669 194 }
mbed_official 507:d4fc7603a669 195
mbed_official 507:d4fc7603a669 196 //******************************************************************************
mbed_official 507:d4fc7603a669 197 float analogout_read(dac_t *obj)
mbed_official 507:d4fc7603a669 198 {
mbed_official 507:d4fc7603a669 199 return (((float)analogout_read_u16(obj) / (float)0xFFFF) * 1.5);
mbed_official 507:d4fc7603a669 200 }
mbed_official 507:d4fc7603a669 201
mbed_official 507:d4fc7603a669 202 //******************************************************************************
mbed_official 507:d4fc7603a669 203 uint16_t analogout_read_u16(dac_t *obj)
mbed_official 507:d4fc7603a669 204 {
mbed_official 507:d4fc7603a669 205 if(obj->index < 2) {
mbed_official 507:d4fc7603a669 206 // Convert 12 bits to 16 bits
mbed_official 507:d4fc7603a669 207 return (obj->out << 4);
mbed_official 507:d4fc7603a669 208 } else {
mbed_official 507:d4fc7603a669 209 // Convert 8 bits to 16 bits
mbed_official 507:d4fc7603a669 210 return (obj->out << 8);
mbed_official 507:d4fc7603a669 211 }
mbed_official 507:d4fc7603a669 212 }